JP2019037974A - Sheet structure, wastewater treatment apparatus having the same, and method for manufacturing sheet structure - Google Patents

Abstract

To provide a sheet structure capable of sufficiently securing a gas delivery amount in a gas delivery layer, a waste water treatment apparatus having the same, and a method of manufacturing the sheet structure.SOLUTION: A sheet structure 10 includes a gas delivery layer 11 and a gas permeable impermeable layer 21. The gas delivery layer 11 includes a core 12a constituting a gas flow path S for delivering the gas supplied from the first end side in a first direction, a front liner 12b and a back liner 12c sandwiching the core 12a to face each other and gas passage holes 13 formed in the front liner 12b and back liner 12c. The gas permeable impermeable layer 21 has a property of permeating the gas outward and not permeating the outside liquid to the inside, and covers the front liner 12b and the back liner 12c.SELECTED DRAWING: Figure 4

Description

  The present invention relates to, for example, a sheet structure used in a wastewater treatment apparatus that utilizes the action of microorganisms, a wastewater treatment apparatus including the same, and a method for manufacturing the sheet structure.

  In recent years, wastewater treatment apparatuses that purify wastewater by decomposing organic sludge substances by utilizing the action of aerobic microorganisms have been developed. For example, in the wastewater treatment apparatus, in order to continuously supply oxygen to aerobic microorganisms contained in wastewater at a low cost, a sheet structure including a sheet that transmits gas and does not transmit liquid is used. ing.

  For example, Patent Document 1 includes a) at least one porous gas permeable impermeable layer, and b) a plurality of flow channels that can carry gas to the layer of part a), the layer of part a) A device comprising a layered sheet structure comprising a gas delivery layer attached to a gas inlet and a gas inlet, wherein gas is delivered through the gas permeable layer a) to remove organic materials and / or nitrogen sources from an aqueous medium It is disclosed.

Japanese Patent No. 4680504

However, the conventional sheet structure has the following problems.
That is, in the sheet structure disclosed in the above publication, the gas permeable layer is fixed at the tops of the plurality of main walls forming the gas delivery layer.

  For this reason, when the sheet structure having such a configuration is immersed in the liquid, the gas permeable layer is pushed by the water pressure outside the sheet structure. Since the water pressure is larger than the pressure at which air is discharged to the outside of the sheet structure, the gas permeable layer is in close contact with the comb-like flow channel formed in the gas delivery layer, and the cross-sectional area of the flow channel is Becomes smaller. And since the pressure of the discharged | emitted air is smaller than a water pressure, there exists a possibility that it may become difficult to supply sufficient quantity of gas in a gas delivery layer.

  In particular, when the sheet structure is used in, for example, a wastewater treatment apparatus that purifies wastewater by utilizing the action of microorganisms, it is necessary to continuously supply oxygen to the microorganisms. For this reason, it is not preferable that the supply of sufficient air into the gas delivery layer is hindered because the activity of microorganisms is reduced.

  The subject of this invention is providing the manufacturing method of the sheet | seat structure which can fully ensure the gas delivery amount in a gas delivery layer, the waste water treatment apparatus provided with the same, and a sheet | seat structure.

  A sheet structure according to a first aspect of the present invention is a sheet structure that supplies a gas supplied from a gas supply source into a liquid while being immersed in the liquid, and includes a gas delivery layer, a gas passage hole, And a gas permeable impermeable layer. The gas delivery layer delivers the gas supplied from the first end side in the first direction and has a first surface. The gas passage hole is formed in the first surface. The gas permeable impermeable layer has a property of allowing gas to permeate outside and preventing the outer liquid from permeating inside, and covers the first surface.

  With this configuration, the gas passage hole allows the gas flow path of the gas delivery layer and the gas permeable impermeable layer to communicate with each other, and the gas supplied to the gas delivery layer is liquid via the gas permeable impermeable layer. Supply inside.

  In addition, a gas delivery layer is a layer which has a gas flow path which sends out the gas supplied from the 1st end side in a 1st direction. The gas permeable impermeable layer is a layer having a characteristic that the gas supplied to the gas delivery layer is transmitted to the outside and the outside liquid is not transmitted to the inside. The gas passage hole is a portion that supplies a gas into the liquid by communicating the gas flow path formed on the first surface of the gas delivery layer with the gas permeable impermeable layer.

  Here, for example, in the sheet structure used in the wastewater treatment apparatus utilizing the action of microorganisms, the first surface of the gas delivery layer that forms the gas flow path is covered with the gas permeable impermeable layer. Immerse in the liquid. And in order to prevent the cross section of a gas flow path from becoming small with water pressure in the state immersed in the liquid, the support part holding the space of a gas flow path is provided in the gas delivery layer.

  Here, for the gas delivery layer, for example, a hollow plate-like member such as a corrugated board material arranged so that a gas flow path is formed in the first direction or a hollow body having a circular or polygonal cross section is used. Can do. Note that the gas supplied to the gas delivery layer may be, for example, air containing oxygen supplied to microorganisms when used in a wastewater treatment apparatus.

  Further, the gas permeable impermeable layer is a sheet that transmits gas disposed so as to cover the first surface of the gas delivery layer and does not transmit water, and has, for example, a bag shape. The surface of the gas delivery layer covered with the gas permeable impermeable layer may be one surface substantially parallel to the first direction or a plurality of surfaces. Moreover, the 2nd end on the opposite side to the 1st end in a gas delivery layer may be covered with the gas-permeable impermeable layer, and may be covered with the other member.

  Furthermore, a gas passage hole is a through-hole formed in the gas delivery layer, for example. This through hole may be formed when the gas delivery layer is formed, or may be formed by processing after the formation of the gas delivery layer.

  Thereby, in the state immersed in the liquid, the gas supplied from the 1st end side in a gas delivery layer can be supplied in the liquid from the surface of a gas-permeable impermeable layer through a gas passage hole. it can. And it can hold | maintain with a support part so that the gas flow path in a gas delivery layer may not become small with the water pressure of a liquid.

  As a result, it is possible to secure a sufficient amount of gas delivery in the gas delivery layer (gas channel).

  The sheet structure according to the second invention is the sheet structure according to the first invention, wherein the gas delivery layer has a support part constituting the gas flow path, and the first surface is the support part. Are arranged opposite to each other.

  Here, for example, the gas flow path is configured in the gas delivery layer using a hollow plate-like member such as a corrugated board material arranged so that the gas flow path is formed in the first direction as the support portion, and the first The surfaces are arranged to face each other so as to sandwich the support portion.

  Thereby, a gas delivery layer can be comprised using an inexpensive material by comprising a gas delivery layer using a hollow plate-shaped member, for example.

  The sheet structure according to the third invention is the sheet structure according to the first or second invention, and the gas permeable impermeable layer has a microorganism on its surface to which microorganisms contained in the liquid adhere. It has an adhesion part.

  The gas permeable impermeable layer is a layer to which microorganisms contained in the liquid adhere to the surface.

  Here, for example, when the sheet structure is used in a wastewater treatment apparatus, microorganisms adhere to the surface of the gas-permeable impermeable layer that is in contact with the liquid while being immersed in the liquid.

  Here, if the microorganisms contained in the wastewater are aerobic microorganisms, there is a habit of gathering to the side to which air (oxygen) is supplied.

  Thereby, in the sheet | seat structure of this invention, microorganisms adhere to the surface of the gas-permeable impermeable layer which touches a liquid in the state gathered.

  As a result, when used in wastewater treatment equipment, a sufficient amount of oxygen is supplied to the microorganisms contained in the wastewater to activate the function of aerobic microorganisms and improve the wastewater purification capacity. Can be made.

  A sheet structure according to a fourth invention is the sheet structure according to any one of the first to third inventions, wherein the gas permeable impermeable layer has an opening formed on the first end side. It has an open bag shape.

  Here, as the gas permeable impermeable layer covering the first surface of the gas delivery layer, for example, using a bag-shaped member formed by bonding a sheet material having a characteristic of allowing gas to pass and not liquid to pass Yes.

  Thereby, the state which covered the 1st surface of the gas delivery layer with the gas-permeable impermeable layer can be formed only by inserting the gas delivery layer from the bag-shaped opening side.

  As a result, in the state immersed in the liquid, the liquid does not permeate to the gas delivery layer side, and the gas is allowed to permeate into the liquid through the gas permeable impermeable layer from the gas delivery layer side. Can be supplied.

  A sheet structure according to a fifth invention is the sheet structure according to any one of the first to fourth inventions, wherein the gas delivery layer includes a plurality of gas flows formed along the first direction. It is comprised by the hollow plate-shaped member which has a path.

  Here, the gas delivery layer is configured using a hollow plate-like member in which a plurality of gas flow paths (vent holes) formed along the first direction are arranged.

  Here, the hollow plate-like member is, for example, a sheet-like member configured by overlapping a rib or corrugated core material so as to be sandwiched between a front sheet (liner) and a back sheet (liner). Thus, for example, a structure such as a corrugated cardboard material can be mentioned. The hollow plate member is formed of, for example, paper or plastic.

  Thereby, a gas delivery layer can be comprised using an inexpensive material by using the part of the vent formed with the core material of a hollow plate-shaped member as a gas flow path. And if the front sheet | seat (liner) of a hollow plate-shaped member is made into one 1st surface, it can be set as a gas passage hole by forming a hole by processing etc. in the surface of a front sheet | seat, for example.

  As a result, a gas delivery layer having a gas flow path and a gas passage hole can be configured using the hollow plate member.

  The sheet structure according to the sixth invention is the sheet structure according to the fifth invention, and the material of the hollow plate-shaped member is any one of paper, resin, and metal.

  Here, as a preferable material for the hollow plate member, for example, a resin such as paper, polyolefin, polystyrene, polyvinyl chloride or polyester, a metal such as aluminum, or the like can be used.

  Thereby, the gas delivery layer containing a gas flow path can be comprised using an inexpensive material.

  A sheet structure according to a seventh aspect is the sheet structure according to any one of the first to sixth aspects, wherein the fabric is laminated between the gas delivery layer and the gas permeable impermeable layer. Is arranged.

Here, a fabric is disposed between the gas delivery layer and the gas permeable impermeable layer.
Here, the fabric includes a material having high gas permeability such as a woven fabric such as cotton and linen, and a nonwoven fabric.

  Thus, when the gas is supplied from the gas passage hole that connects the gas flow path of the gas delivery layer and the gas permeable impermeable layer, the gas is transmitted to the gas permeable impermeable layer through the fabric layer. The gas supplied from the gas permeable impermeable layer into the liquid is supplied from a range having a certain extent, not a local range corresponding to the gas passage hole.

  As a result, the gas supply area on the surface of the gas permeable impermeable layer can be expanded to supply the gas into the liquid more efficiently.

  The sheet structure according to the eighth invention is the sheet structure according to the seventh invention, and the material of the fabric is any one of a woven fabric, a mesh sheet, a nonwoven fabric, and a pore membrane.

Here, as a preferable material for the fabric, for example, any one of a woven fabric, a mesh sheet, a non-woven fabric, and a pore membrane can be used.
Thereby, a fabric with high gas permeability can be constituted using an inexpensive material.

  A sheet structure according to a ninth aspect is the sheet structure according to any one of the first to fourth aspects, wherein the gas delivery layer has a plurality of first gas passage holes on one first surface. A plurality of second gas passage holes are provided on the other first surface, and the plurality of second gas passage holes are located at positions shifted in the first direction with respect to the first gas passage hole.

  Here, as a gas delivery layer, for example, in a configuration using a honeycomb structure, in order to secure a gas flow path in the first direction, two gas passage holes are arranged at positions shifted in the first direction. A honeycomb structure (one first surface and the other first surface) is overlaid.

  Thereby, the gas flow path in the first direction can be formed by using two or more honeycomb structures in which the positions of the gas passage holes are shifted.

  In addition to the honeycomb, the gas passage hole can be formed in other shapes such as a circle, a rectangle, a polygon, and an irregular shape.

  A wastewater treatment apparatus according to a tenth aspect of the invention includes at least a purification unit including a sheet structure according to any one of the first to ninth aspects, and a sheet structure that stores wastewater and is included in the purification unit. And a wastewater treatment tank in which a part is immersed.

  Here, a waste water treatment apparatus including a purification unit including the above-described sheet structure and a waste water treatment tank in which at least a part of the sheet structure included in the purification unit is immersed is configured.

  Here, the gas supplied from the gas supply source to the sheet structure includes, for example, air (oxygen) that activates aerobic microorganisms contained in the wastewater.

  Moreover, the sheet structure contained in the purification unit may be singular or plural.

  As a result, waste water is supplied by supplying air (oxygen) from the gas supply source to the sheet structure while the purification unit (sheet structure) is immersed in the waste water stored in the waste water treatment tank. Air can be supplied from the surface of the gas permeable impermeable layer of the sheet structure immersed therein.

  As a result, air is supplied to and activated aerobic microorganisms in the wastewater at a low cost without arranging a pump for supplying oxygen, and at least one organic substance or nitrogen source contained in the wastewater is obtained. By promoting the decomposition, the wastewater treatment capacity can be improved.

  A wastewater treatment apparatus according to an eleventh aspect of the invention is the wastewater treatment apparatus according to the tenth aspect of the invention, further comprising a power unit that sends gas into the gas delivery layer of the sheet structure.

  Here, for example, even when the height of the sheet structure is 100 cm or more, the power unit is provided as a configuration for providing sufficient wastewater treatment performance.

Here, the power unit may be a fan that sends a gas such as air into the gas delivery layer.
Thereby, even when a sheet structure having a height of 100 cm or more is used, a gas structure can be sent into the gas delivery layer using a power unit such as a fan, so that the sheet structure is immersed in waste water. And a sufficient amount of gas can be supplied to the wastewater.
As a result, it is possible to increase the oxygen concentration in the wastewater and obtain a higher wastewater treatment performance.

  A sheet structure manufacturing method according to a twelfth aspect of the present invention is the sheet structure manufacturing method according to any one of the first to eighth aspects of the present invention, comprising an arrangement step, a hole forming step, and a covering step. And. The placing step places the gas delivery layer. In the hole forming step, a gas passage hole is formed on the first surface of the gas delivery layer facing the gas permeable impermeable layer using a needle material having a needle disposed on the surface. In the covering step, the gas delivery layer in which the gas passage hole is formed on the first surface is covered with the gas permeable impermeable layer.

  Here, at the time of manufacturing the above-described sheet structure, after forming a gas passage hole on the first surface of the gas delivery layer using a needle material, the first surface on which the gas passage hole is formed is formed as a gas permeable impermeable water. Cover with sex layer.

  Here, as the needle material used in the hole forming step, for example, a member having a plurality of needles attached to a roll-shaped surface, or a member for manually forming a gas passage hole by attaching one needle, etc. Can be used.

Thereby, even when the 1st surface of a gas delivery layer is covered with the board | plate material etc., a required gas passage hole can be easily formed by processing using a needle material in a hole formation step.
As a result, the above-described sheet structure can be manufactured by an inexpensive method.

  A method for manufacturing a sheet structure according to a thirteenth invention is a method for manufacturing a sheet structure according to the twelfth invention, wherein the needle material includes a roll-shaped main body portion and a plurality of needle members arranged on the surface of the main body portion. And a needle.

  Here, a member in which a plurality of needles are attached to the surface of the roll-shaped main body is used as the needle material.

  Thereby, for example, by using in combination with another roll-shaped member having no needle on the surface, it is only necessary to pass a hollow plate-shaped member such as a corrugated cardboard material between the flat plate and the roll. A hole functioning as a gas passage hole can be formed at the position.

  Moreover, even when using two rolls, the hole which functions as a gas passage hole to the desired position in the 1st surface of a hollow plate member can be formed by allowing a hollow plate member to pass between rolls.

  A method for manufacturing a sheet structure according to a fourteenth invention is a method for manufacturing a sheet structure according to the twelfth or thirteenth invention, wherein, in the covering step, a bag-like gas permeation having an opening on the first end side. The gas delivery layer constituting the gas delivery layer is inserted from the opening of the water-impermeable layer.

  Here, in the coating step, the gas delivery layer is inserted from the opening of the gas permeable impermeable layer formed in a bag shape.

  Thereby, the state by which the outer periphery (1st surface) of the gas delivery layer was covered with the gas-permeable impermeable layer can be formed easily.

  According to the sheet structure according to the present invention, it is possible to sufficiently ensure the gas delivery amount in the gas delivery layer (gas flow path).

The front view which shows the structure of the waste water treatment apparatus provided with the sheet | seat structure which concerns on one Embodiment of this invention. The top view of the waste water treatment apparatus of FIG. The side view of the waste water treatment apparatus of FIG. Sectional drawing which shows the sheet | seat structure which comprises the purification | cleaning unit contained in the wastewater treatment apparatus of FIG. The perspective view which shows the gas delivery layer which comprises the sheet | seat structure of FIG. The microbial aggregate formed on the surface of the gas-permeable impermeable layer of the sheet structure immersed in the wastewater in the wastewater treatment tank of the wastewater treatment apparatus of FIG. 1, and at least one organic substance or nitrogen source by the microorganisms FIG. The flowchart which shows the flow of the manufacturing method of the sheet | seat structure of FIG. The schematic diagram which shows the process of forming the gas moisture-permeable impermeable layer which comprises the sheet | seat structure of FIG. 4 in a bag shape. The schematic diagram which shows the process of inserting a hollow plate-shaped member (corrugated cardboard material) from opening of the bag-shaped gas moisture-permeable impermeable layer of FIG. Sectional drawing which shows the structure of the sheet | seat structure which concerns on other embodiment of this invention. The enlarged view of A part of FIG. The disassembled perspective view which shows the structure of the gas delivery layer contained in the sheet | seat structure which concerns on further another embodiment of this invention. (A) is a front view which shows the honeycomb structure which comprises the gas delivery layer of FIG. (B) is the side view. (C) is the sectional view on the AA line of (a). FIG. 14 is an enlarged view of a portion C in FIG. The disassembled perspective view which shows the structure of the gas delivery layer contained in the sheet | seat structure which concerns on further another embodiment of this invention. (A) is a front view which shows the honeycomb structure which comprises the gas delivery layer of FIG. (B) is the side view. (C) is the BB sectional drawing of (a). The enlarged view of the D section of Drawing 16 (c). The perspective view which shows the gas delivery layer contained in the sheet | seat structure which concerns on further another embodiment of this invention. The figure which compared the sheet | seat structure which concerns on the Example of this invention, and the comparative example. (A) is a figure which shows the structure which used the hollow body which has a circular or polygonal cross section as a gas delivery layer. (B) is the sectional view on the AA line of (a). (C) is the sectional view on the AA line when (a) has a polygonal section. (A) is a top view which shows the state which installed the gas delivery layer shown to Fig.20 (a) etc. in a waste-water-treatment tank. (B) is the side view. The graph which shows the relationship between the distance from the 1st edge part at the time of changing the height of a sheet | seat structure, and the oxygen concentration in a gas delivery layer.

  A sheet structure 10 according to an embodiment of the present invention, a wastewater treatment apparatus 50 including the sheet structure 10, and a method for manufacturing the sheet structure 10 will be described below with reference to FIGS.

(Waste water treatment device 50)
The wastewater treatment apparatus 50 of the present embodiment performs the purification process of the wastewater W by decomposing at least one organic substance or nitrogen source in the wastewater W using the action of aerobic microorganisms contained in the wastewater W. And the wastewater treatment apparatus 50 is provided with the wastewater treatment tank 51, the purification | cleaning unit 52, and the gas supply source 53, as shown in FIG.

  Note that the method for retaining the aerobic microorganisms is not limited to the above, and the surface structure 21a of the gas permeable impermeable layer 21 is supported on the surface 21a of the gas permeable impermeable layer 21 before the sheet structure 10 is immersed in the waste water W, for example. May be.

(Waste water treatment tank 51)
As shown in FIGS. 2 and 3, the waste water treatment tank 51 is a bottomed container in which the waste water W is stored, and an inflow port 51 a and an outflow port 51 b are provided on side surfaces facing each other.

  In the present embodiment, the inlet 51a and the outlet 51b are always open. And as shown in FIG. 3, the waste water W is continuously supplied from the inflow port 51a toward the outflow port 51b arrange | positioned in the position facing the inflow port 51a.

Note that the volume of the waste water treatment tank 51 is not particularly limited, for example, as long as 1 m ³ or more 10,000 m ³ or less of the volume.

(Purification unit 52)
As shown in FIG. 1, the purification unit 52 is disposed inside the wastewater treatment tank 51 and is configured to include a plurality (in this embodiment, five) of sheet structures 10. And the purification | cleaning unit 52 is arrange | positioned so that the part except the upper end part of the sheet | seat structure 10 may be immersed in the waste water W at the time of use.

  Moreover, the purification | cleaning unit 52 is arrange | positioned so that the surface of each sheet | seat structure 10 may become parallel with respect to the straight line which connects the inflow port 51a and the outflow port 51b, as shown in FIG.2 and FIG.3. Thereby, the waste water W supplied into the waste water treatment tank 51 from the inflow port 51a moves in the direction of the outflow port 51b without being blocked by the sheet structure 10.

(Sheet structure 10)
The sheet structure 10 is a flat member and is immersed in the wastewater treatment tank 51 in order to supply gas (air, oxygen, etc.) at low cost to aerobic microorganisms in the wastewater W. Used in state.

  Further, as shown in FIGS. 2 and 3, the flat sheet structure 10 is arranged so that the surface is developed along the vertical direction (depth direction) and the horizontal direction (horizontal direction) in the drawing. Has been. Thereby, a contact area with the waste water W is ensured efficiently. In the present embodiment, the purification unit 52 is configured by a plurality of sheet structures 10 arranged in parallel to each other.

  The gas supplied from the gas supply source 53 into the waste water W through the sheet structure 10 is preferably a gas containing oxygen in order to promote activation of aerobic microorganisms. Specifically, it may be air or pure oxygen.

  An air supply device or the like can be used as a gas supply source for supplying gas to the sheet structure 10.

  And the sheet | seat structure 10 is provided with the gas delivery layer 11 and the gas-permeable impermeable layer 21, as shown in FIG.

(Gas delivery layer 11)
The gas delivery layer 11 is covered with a gas permeable impermeable layer 21 described later on the outer peripheral portion except the upper end portion. In the gas delivery layer 11, gas is supplied from the gas supply source 53 to the upper end portion, and the gas flow path S is formed inside. More specifically, the gas delivery layer 11 has a hollow plate member 12 and a gas passage hole 13 as shown in FIG.

  As shown in FIGS. 20A to 20C, the gas delivery layer 511 configured by a hollow body having a circular or polygonal cross section is used as the gas delivery layer constituting the gas flow path S. May be.

  In this case, as shown in FIG. 20 (a) and FIG. 20 (b), the gas permeable impermeable property is formed on the outer peripheral surface (first surface) of the gas delivery layer 511 as a hollow body having a circular cross section. The layer 521 may be provided.

  Further, in the configuration using a hollow body having a polygonal cross section, as shown in FIG. 20 (c), gas permeation occurs on the four side surfaces (first surface) of the hollow body having a polygonal (quadrangle) cross section. The water-impermeable layer 521 may be disposed.

  When the sheet structure 10 including the gas delivery layer 11 using such a hollow body is configured, as shown in FIGS. 21A and 21B, a predetermined number of sheet structures 10 are 1 A plurality of sets as a set may be installed in the wastewater treatment tank 551.

Further, as the hollow body, a mesh-like polygonal cross-sectional column or the like can be used.
For example, Dainippon Plastic Co., Ltd., High Density Polyethylene Trial Pipes P-489, P-222, P-273, P-239, or Dainippon Plastic Co., Ltd. Polyethylene Netron Pipes GK-50, HK-100, Polypropylene Netron pipes P-N1, P-506, etc., are preferably used. Alternatively, a net ring contact material XE-55R, XE-65R, XE-90R made of Zebioplast, a high density polyethylene net contact material XE-55P, XE-65P, XE-90P, or High density polyethylene fluidized bed carriers BIO-14, BIO-33R, XE-55Z and the like are preferably used.

  The outer diameter of the circular or polygonal cross section is preferably 5 mm or more from the viewpoint of enhancing gas supply performance, more preferably 10 mm or more, and from the viewpoint of reducing the volume of the wastewater treatment apparatus 50, 100 mm or less is preferable, and 60 mm or less. Is more preferable.

  Further, the gas delivery layer 11 may have a configuration in which a support portion is disposed inside a hollow body having a circular or polygonal cross section.

  The hollow plate-like member 12 is a member that constitutes the base portion of the gas delivery layer 11, forms a gas flow path S therein, and moves the gas in the first direction (see the two-dot chain line in FIG. 5). At the same time, gas is released from the side surfaces (the front liner 12b and the back liner 12c). As shown in FIG. 5, the hollow plate-like member 12 includes a core material (support portion) 12 a, a front liner (one first surface, support portion) 12 b, and a back liner (the other first surface, support). Part) 12c. As the hollow plate member 12, for example, corrugated cardboard can be used.

  As shown in FIG. 5, the core member 12 a has a rib shape and is arranged in a state of being sandwiched between a plate-like front liner 12 b and a back liner 12 c. Thereby, the gas flow path S divided | segmented into the some division by the rib-shaped core material 12a is formed in the space between the front liner 12b and the back liner 12c.

  The core member 12a supports the front liner 12b and the back liner 12c together with the front liner 12b and the back liner 12c so that the gap between the front liner 12b and the back liner 12c is not reduced when pressed from the front liner 12b and the back liner 12c side. It functions as a support part. That is, as shown in FIG. 1 and the like, the core material 12a, together with the front liner 12b and the back liner 12c, does not reduce the cross-sectional area of the gas flow path S in a state where the sheet structure 10 is immersed in the waste water W. Preserve space.

  Thereby, the gas delivery amount in the gas delivery layer 11 (gas flow path S) can be sufficiently secured.

  The front liner (one first surface) 12b and the back liner (the other first surface) 12c arranged to face each other are plate-like members constituting the front and back surfaces of the gas delivery layer 11, as shown in FIG. A plurality of through holes (gas passage holes 13) are formed.

  In FIG. 5, a plurality of through holes (gas passage holes 13) are formed in the back liner 12c, but a plurality of through holes (gas passage holes 13) are formed in the front liner 12b as well. Shall.

  The gas passage holes 13 are a plurality of through holes formed in the front liner 12b and the back liner 12c, respectively, and communicate with a gas flow path S formed between the core material 12a, the front liner 12b, and the back liner 12c. .

  That is, the gas passage hole 13 is formed to allow communication from the gas supply source 53 to the gas permeable impermeable layer 21.

  The gas passage hole 13 is formed by processing the front liner 12b and the back liner 12c, for example.

  Here, since the activity of the aerobic microorganism is reduced unless oxygen is continuously supplied, it is important to keep supplying oxygen efficiently in order to maintain the wastewater treatment capacity.

  Therefore, in the sheet structure 10 of the present embodiment, when gas is supplied from the upper end of the gas delivery layer 11, the front liner (one first surface) 12b and the back liner (the other first side) of the gas delivery layer 11 are used. The gas flows out from the plurality of gas passage holes 13 formed in the surface 12c to the gas permeable impermeable layer 21 side.

  As a result, by continuously supplying air to the aerobic microorganisms adhering to the surface of the gas permeable impermeable layer 21, the action of the microorganisms is activated and at least one organic in the sewage is obtained. Waste water can be purified by efficiently decomposing substances or nitrogen sources.

  As materials of each member constituting the gas delivery layer 11, paper, ceramic, aluminum, iron, plastic (polyolefin resin, polystyrene resin, polyester resin, polyvinyl chloride resin, acrylic resin, urethane resin, epoxy resin, polyamide resin, Methyl cellulose resin, ethyl cellulose resin, polyvinyl alcohol resin, vinyl acetate resin, phenol resin, fluororesin, and polyvinyl butyral resin).

  And as a raw material of the hollow plate-shaped member 12 which comprises the gas delivery layer 11, it is preferable that they are paper, aluminum, iron, polyolefin resin, a polystyrene resin, a vinyl chloride resin, and a polyester resin from the viewpoint of the intensity | strength surface. .

The area of the gas passage hole 13 is preferably in the range of 3 * 10 ^{−8 to} 2000 mm ² , and particularly preferably in the range of 7 * 10 ^{−7 to} 350 mm ² .

  In addition, when the area of the gas passage hole 13 falls below the lower limit of the above range, the air flow rate in the gas passage hole 13 may be reduced, and the treatment performance of the waste water W may be reduced. On the contrary, when the area of the gas passage hole 13 exceeds the upper limit of the above range, the amount of deformation of the gas permeable impermeable layer 21 pushed by water pressure increases, and the gas moves in the gas delivery layer 11. May be hindered and the treatment performance of the wastewater W may be reduced.

Therefore, the area of the gas passage hole 13 is preferably set within the above range.
Further, the gas passage hole 13 is set such that the opening ratio of the gas passage hole 13 with respect to the area of one surface (the front liner 12b or the back liner 12c) of the gas delivery layer 11 is in a range of 1% to 90%. It is preferable that it is in the range of 1% to 80%.

  In addition, when the said opening rate is less than a lower limit, it will become difficult to supply oxygen to the microorganisms in the wastewater W, and there exists a possibility that the wastewater treatment capacity of the wastewater W may fall. On the other hand, when the open area ratio exceeds the upper limit value, the portion that supports the gas permeable impermeable layer 21 decreases, and the amount of deformation of the gas permeable impermeable layer 21 that is pushed by water pressure increases. Therefore, the gas movement in the gas delivery layer 11 is hindered, and the treatment performance of the waste water W may be deteriorated.

Here, assuming that the outer area S1 (m ² ) of the gas delivery layer 11 and the total area S2 (m ² ) of the gas passage hole 13 in the portion of the sheet structure 10 that is in contact with the waste water W, the gas passage hole 13 is opened. The rate P (%) is obtained by the following relational expression (1).

P = S2 / S1 × 100 (1)
Further, from the viewpoint of maintaining the activity of aerobic microorganisms, it is preferable that an oxygen concentration of 5% or more is secured in the portion where the oxygen concentration is lowest in the gas delivery layer 11, and is 10% or more. Is more preferable.

  As a method of maintaining the oxygen concentration within the above numerical range, the oxygen concentration can be kept constant by supplying a predetermined amount of pure oxygen. As a method of supplying pure oxygen, for example, air supply using power can be considered.

  When the height of the sheet structure 10 is smaller than 100 cm, gas is sufficiently supplied without using power, so that it is preferable not to use power from the viewpoint of reducing energy consumption and suppressing the cost of the apparatus. It is.

  However, when the height of the sheet structure 10 is greater than 100 cm, it is preferable to send gas using a power unit in order to obtain higher wastewater treatment performance.

  FIG. 22 shows two types of sheet structures having a height of 200 cm and a height of 100 cm, and shows the relationship between the distance from the first end and the oxygen concentration in the gas delivery layer 11 in each manufactured wastewater treatment apparatus. It is a graph.

  In the example shown in FIG. 22, the simulated drainage was poured into the tank, and the oxygen concentration of the gas inside the gas delivery layer after 30 days was measured with the water temperature maintained at 24 ° C. to 27 ° C.

  As shown in FIG. 22, when the height of the sheet structure 10 was 100 cm, the oxygen concentration was sufficient for wastewater treatment, and good wastewater treatment performance was obtained.

  On the other hand, when the height of the sheet structure 10 was 200 cm, the oxygen concentration was low. Although wastewater treatment was possible under these conditions, good treatment performance could not be obtained as compared with the case where the height of the sheet structure 10 was 100 cm.

  Next, even if the height of the sheet structure 10 is 200 cm, a pipe is inserted from the first end of the gas delivery layer 11 and the pipe is moved to a position where the distance from the first end of the gas delivery layer 11 is 190 cm. When the air was inserted and the power part was arranged at the other end of the pipe to send air, the inside of the gas delivery layer 11 had an oxygen concentration equivalent to that of air, and good wastewater treatment performance was obtained.

  As a method of sending gas using power, for example, a fan may be installed in the wastewater treatment apparatus 50 so that the gas flow generated by the fan enters the gas delivery layer 11.

  For example, a ceiling fan may be installed on the upper portion of the seat structure 10 so that wind generated by the ceiling fan enters the gas delivery layer 11. Moreover, piping may be provided in the air outlet of the fan installed in arbitrary places, and the gas outlet from piping may be installed inside the gas delivery layer 11.

  In addition, as another method for improving the gas supply amount, the ratio of the cross-sectional area of the gas delivery layer 11 to the area of the gas permeable impermeable layer 21 of the sheet structure 10 that is in contact with the first surface of the gas delivery layer 11. There is a way to make it bigger.

  Specifically, it is preferable to increase the inner diameter of the cross section constituted by the first surface of the gas delivery layer 11 or to increase the interval between the first surfaces opposed to the gas delivery layer 11. .

  Here, the length in the vertical direction (depth direction during immersion) of the gas flow path S formed in the gas delivery layer 11 may be 0.2 m or more, preferably 0.8 m or more, for example. 3.7 m or more. Moreover, the said length may be 6 m or less, for example, Preferably it is 4 m or less. The length in the lateral direction perpendicular to the vertical direction of the gas flow path S may be, for example, 0.2 m or more, preferably 0.6 m or more, for example, 3.6 m or less, preferably 1.8 m or less. It's okay.

  Here, the fact that the vertical length of the gas flow path S is not less than the above lower limit is that the gas flow path S can be easily maintained and the gas flow path S can be easily ventilated to improve the wastewater treatment performance. Preferably, it is preferably less than or equal to the above upper limit value from the viewpoint of obtaining a better wastewater treatment performance improvement effect by ventilation of the gas flow path S and the ease of installation.

  Moreover, it is preferable that the lateral length of the gas flow path S is equal to or greater than the lower limit value in terms of efficiently securing a contact area with the wastewater W and improving wastewater treatment efficiency. It is preferable in terms of the ease of maintaining the strength of the entire sheet structure 10 and the ease of installation of the purification unit 52.

  The water contact length with respect to the length of the gas flow path S with respect to the waste water W should just be 80% or more and 95% or less, for example. It is preferable that the water contact length is not less than the above lower limit value in terms of ensuring a good amount of oxygen supplied from the gas flow path S and improving wastewater treatment efficiency, and the water contact length is not more than the above upper limit value. This is preferable in terms of preventing the waste water W from entering the gas flow path S.

  Alternatively, in terms of preventing the wastewater W from entering the gas flow path S, the water contact length is such that the water surface of the wastewater W is separated by 2 cm or more from the opening 21b of the sheet structure 10 (gas permeable impermeable layer 21). May be set.

  The thickness of the gas permeable impermeable layer 21 may be, for example, 15 μm or more and 1 mm or less. It is preferable that the thickness is equal to or greater than the lower limit in terms of preventing breakage and ensuring the gas flow path S stably, and being equal to or lower than the upper limit ensures satisfactory oxygen permeability and wastewater treatment efficiency. It is preferable at the point which improves.

(Gas permeable impermeable layer 21)
As shown in FIG. 4, the gas permeable impermeable layer 21 is disposed so as to cover an outer peripheral portion excluding the upper end portion of the gas delivery layer 11.

  The gas permeable impermeable layer 21 allows air to pass from the inside (the gas delivery layer 11) to the outside (the waste water W) while the sheet structure 10 is immersed in the waste water treatment tank 51, and the outside. It is comprised with the film which has the characteristic which does not permeate | transmit wastewater from the (waste water W) inside (gas delivery layer 11). The gas permeable impermeable layer 21 supplies air (oxygen) into the waste water W from the surface 21a.

  Thereby, as shown in FIG. 6, the aerobic microorganisms in the wastewater W gather on the surface 21a of the gas permeable impermeable layer 21 to which air (oxygen) is continuously supplied. Therefore, microorganisms adhere to the surface 21 a of the gas permeable impermeable layer 21.

  Further, the gas permeable impermeable layer 21 is formed by, for example, superimposing two films and adhering three end portions thereof to an upper end portion (an end on the side where gas is supplied to the gas delivery layer 11). Part) is formed in a bag shape having an opening 21b (see FIG. 4). The position or shape of the opening 21b is not limited, and a part of each end (including the top side, the bottom side, and the horizontal side (vertical line) of the bag) may be an opening.

  And the sheet | seat structure 10 by which the outer periphery of the gas delivery layer 11 was covered by the gas-permeable impermeable layer 21 by the gas delivery layer 11 mentioned above being inserted in the opening 21b is comprised.

  Here, the gas permeable impermeable layer 21 means a layer that allows gas to permeate and does not allow liquid (water, solution, etc.) to permeate.

  As the gas permeable impermeable layer 21, a porous membrane, a fabric, or the like can be used. The gas permeable impermeable layer 21 may be coated with a resin on the surface or may be a sheet in which no pores are formed. Furthermore, the gas permeable impermeable layer 21 may be composed of a single material, or may be composed of a combination of a plurality of materials.

  The material of the gas permeable impermeable layer 21 is a fluororesin including polyolefin, polystyrene, polysulfone, polyethersulfone, polyarylsulfone, polymethylpentene, polytetrafluoroethylene and polyvinylidene fluoride, polybutadiene, poly (dimethylsiloxane). And the like, and polymeric materials selected from copolymers of these materials, and the like.

<Method for Manufacturing Sheet Structure 10>
The manufacturing method of the sheet structure 10 of this embodiment is performed according to the flowchart shown in FIG.

  Here, the sheet structure 10 is obtained, for example, by inserting the gas delivery layer 11 into the gas permeable impermeable layer 21 formed into a bag shape.

  Specifically, in step S11 shown in FIG. 7, the hollow plate member 12 constituting the gas delivery layer 11 is placed at a predetermined position (placement step).

  Next, in step S12, the surface of the front liner 12b (one first surface) of the hollow plate-like member 12 and the surface of the back liner 12c (the other first surface) are respectively formed with through-holes (needle material). A plurality of gas passage holes 13) are formed (hole forming step).

  Here, as the needle material for performing the hole processing, for example, a roll-shaped configuration in which needles are arranged on the surface of the entire housing of the gas delivery layer 11 may be used.

  In this case, by rotating a roll having a needle disposed on the surface and passing the hollow plate member 12 between the roll and a plane, a through hole (gas passage hole 13) is formed on the surface of the hollow plate member 12. Can be formed.

  In addition, as a needle material for forming the gas passage hole 13, for example, the gas passage hole 13 is formed by pressing a plate with needles arranged on the surface against the surface of the hollow plate member 12, in addition to the roll-shaped configuration. May be.

  Further, for example, the gas passage hole 13 may be formed by using a cutter such as a cutter knife.

  Next, in step S <b> 13, a bag-like gas-permeable impermeable layer 21 is formed by laminating a substantially square gas-permeable impermeable film and bonding the three ends.

  Specifically, as shown in FIG. 8, in a state where the films F1 and F2 fed out from the two rolls R1 and R2 are overlapped, the three end portions are heat-welded to form a heat-welded portion 21c. . Then, in a state where the three sides are sealed by the heat-welded portion 21c, the films F1 and F2 are cut at a portion that becomes the opening 21b.

  The method of forming the gas permeable impermeable layer 21 into a bag shape is not particularly limited. For example, two substantially rectangular films having gas permeable impermeable properties are overlapped, You may shape | mold by adhere | attaching the outer peripheral edge part of 3 directions. Or you may shape | mold into a bag shape by adhere | attaching only one opening part of the gas-permeable impermeable film shape | molded by the cylinder shape. Alternatively, a single film may be folded in half, and the left and right ends may be heat-welded to form a bag. Alternatively, the bag-like gas permeable impermeable layer 21 may be formed by inflation molding or the like.

  Further, the method for adhering the film is not particularly limited, and for example, heat fusion, double-sided tape, adhesive, or the like can be used.

  The heat fusion temperature is preferably not lower than the melting point of the gas permeable impermeable layer and not higher than the thermal decomposition temperature. The adhesive material is preferably one having at least one of water resistance, water resistance, chemical resistance, and microbial resistance.

  Next, in step S14, as shown in FIG. 9, the hollow plate-like member 12 in which the gas passage hole 13 is formed is inserted from the opening 21b of the bag-shaped gas-permeable impermeable layer 21 (covering step). .

  In addition, as a direction which inserts the hollow plate-shaped member 12 from the opening 21b of the gas-permeable impermeable layer 21, it inserts along the direction of the gas flow path S formed by the core material 12a.

  Thereby, the sheet | seat structure 10 can be comprised in the state which can be connected with a gas supply source from an upper end part.

(Embodiment 2)
The sheet structure 110 according to Embodiment 2 of the present invention will be described below with reference to FIGS. 10 and 11.

  The sheet structure 110 of the present embodiment is different from the configuration of the first embodiment in that the fabric 131 is disposed between the gas delivery layer 111 and the gas permeable impermeable layer 121.

  That is, in the sheet structure 110 of the present embodiment, as shown in FIG. 10, the fabric 131 may be disposed between the gas permeable impermeable layer 121 and the gas delivery layer 111.

  Here, as the fabric 131, for example, a mesh sheet, a woven fabric, a non-woven fabric, a pore membrane, or the like can be used.

  Examples of the material of the fabric 131 include polyolefin resin, polystyrene resin, polyester resin, polyvinyl chloride resin, acrylic resin, urethane resin, epoxy resin, polyamide resin, methyl cellulose resin, ethyl cellulose resin, polyvinyl alcohol resin, and vinyl acetate resin. , Phenol resin, fluororesin, and polyvinyl butyral resin.

  In particular, the fabric 131 is particularly preferably formed of paper, polyolefin resin, polystyrene resin, vinyl chloride resin, or polyester resin from the viewpoint of gas permeability.

  About the adhesion part when the fabric 131 is laminated | stacked, only an outer peripheral part may be sufficient, and if supply of gas to the gas-permeable impermeable layer 121 is possible, the gas-permeable impermeable layer 121 and a gas delivery layer The entire surface of the fabric 131 may be bonded to the substrate 111.

  Accordingly, by interposing the fabric 131 between the gas permeable impermeable layer 121 and the gas delivery layer 111, as shown in FIG. 11, the gas flows in the surface direction of the gas delivery layer 111 in the fabric 131. Can be moved to. Therefore, as compared with the configuration in which the fabric 131 is not interposed, the gas delivered from the gas passage hole 13 of the gas delivery layer 111 is expanded in the plane direction of the back liner 12c of the hollow plate-like member 12 so that the gas permeability is not increased. It can be supplied to the water permeable layer 121.

  As a result, the gas permeable impermeable layer 121 in contact with the waste water W is not locally supplied with gas compared to the configuration in which the fabric 131 is not interposed, but the gas is discharged from a wider range in the waste water W. Can be supplied to.

  Further, since the fabric 131 is disposed so as to be sandwiched between the gas delivery layer 111 and the gas permeable impermeable layer 121, the gas passage hole 113 is adhered to the gas permeable impermeable layer 121. It is possible to prevent gas movement from being blocked.

  Furthermore, since the nonwoven fabric which comprises the fabric 131 has many fine air holes, the effect that it does not become a sealing state can also be expected.

  For example, irregularities may be formed on the surface of the gas permeable impermeable layer 121 opposite to the surface in contact with the waste water W. Even in this configuration, the same effects as when the fabric is arranged can be obtained.

(Embodiment 3)
The sheet structure according to Embodiment 3 of the present invention will be described below with reference to FIGS.

  The sheet structure of the present embodiment is different from the structure of the first embodiment in that a honeycomb structure is adopted as a member constituting the gas delivery layer 211 instead of the hollow plate member. .

  That is, as shown in FIG. 12, the gas delivery layer 211 constituting the sheet structure of the present embodiment includes a first structure 212 having a honeycomb structure, and cells (gas passage holes 212a) of the first structure 212. Is configured by combining a second structure 213 having a honeycomb structure in which cells (gas passage holes 213a) having different sizes are arranged.

  Accordingly, as shown in FIGS. 13A and 13B, when the first structure 212 and the second structure 213 are arranged so as to overlap each other, the gas passage hole 212 a and the second structure 212 of the first structure 212 are arranged. The gas passage hole 213a of the structure 213 is disposed at a position shifted in the vertical direction as shown in FIG.

  As a result, when air is supplied from the upper end of the gas delivery layer 211, as shown in FIG. 14, the gas flow path S is formed through the shifted portions of the gas passage holes 212a and 213a. Gas can be moved in one direction.

  That is, in the present embodiment, the gas delivery layer 211 is configured by combining the first structure 212 and the second structure 213 having the gas passage holes 212a and 213a having different sizes for forming the honeycomb structure, The gas passage holes 212a and 213a can be used as gas passage holes as they are.

  Further, by configuring the gas delivery layer 211 by combining the first structure 212 and the second structure 213 having the gas passage holes 212a and 213a having different sizes, the gas passage holes 212a and 213a are displaced. The gas flow path S can be formed through the space.

Thereby, the effect similar to the said Embodiment 1 can be acquired.
The gas delivery layer 211 is formed by partially adhering the honeycomb structures of the first structure 212 and the second structure 213, and extending the multiple laminated face materials in the normal direction of the surface. And gas passage holes can be formed.

  However, the gas flow path and the gas passage hole may be formed by subjecting the face material to a perforation process before the spreading. In that case, it is possible to supply air only by the first structure.

  Further, the first structure 212 and the second structure 213 constituting the gas delivery layer 211 may be formed using the same material as that of the hollow plate member described in the first embodiment.

(Embodiment 4)
The sheet structure according to Embodiment 4 of the present invention will be described below with reference to FIGS.

  As in the third embodiment, the sheet structure of the present embodiment is a member that constitutes the gas delivery layer 311. The hollow plate-like member has a straight arrangement of the core material (support portion) 12a in FIG. 5 is different from the configuration of the first embodiment in that a configuration in which the positional relationship of the core material (support portion) 12a in FIG. 5 has a honeycomb structure is employed instead of the corrugated cardboard material.

  In the sheet structure of the present embodiment, the first structure 312 and the second structure 313 constituting the gas delivery layer 311 have gas passage holes 312a and 313a having substantially the same size. This is different from the third embodiment.

  That is, in the sheet structure of the present embodiment, as shown in FIG. 15, the first structure 312 having a honeycomb structure and the cells (gas passage holes 312a) of the first structure 312 are in the first direction (in the drawing). And a second structure 313 having a honeycomb structure having cells (gas passage holes 313a) arranged at positions shifted in the vertical direction.

  Accordingly, as shown in FIGS. 16A and 16B, when the first structure 312 and the second structure 313 are arranged so as to be shifted in the vertical direction, the first structure 312 As shown in FIG. 16C, the gas passage hole 312a and the gas passage hole 313a of the second structure 313 are arranged at positions shifted in the vertical direction.

  As a result, when air is supplied from the upper end of the gas delivery layer 311, as shown in FIG. 17, the gas flow path S is formed through the shifted portions of the gas passage holes 312 a and 313 a. Gas can be moved in one direction.

  That is, in the present embodiment, the gas delivery layer 311 is configured by combining the first structure 312 and the second structure 313 having gas passage holes 312a and 313a having substantially the same size to form the honeycomb structure. The gas passage holes 312a and 313a can be used as gas passage holes as they are.

  Furthermore, the gas delivery layer 311 is configured by combining the first structure 312 and the second structure 313 having gas passage holes 312a and 313a having different sizes, so that the gas passage holes 312a and 313a are displaced. The gas flow path S can be formed through the space.

Thereby, the effect similar to the said Embodiment 1 can be acquired.
The gas delivery layer 311 is formed by partially bonding the honeycomb structures of the first structure 312 and the second structure 313, and extending the multiple laminated face materials in the normal direction of the surface, And gas passage holes can be formed.

  However, the gas flow path and the gas passage hole may be formed by subjecting the face material to a perforation process before the spreading. In that case, it is possible to supply air only by the first structure.

  Further, the first structure 312 and the second structure 313 constituting the gas delivery layer 311 may be formed using the same material as the hollow plate member described in the first embodiment.

[Other Embodiments]
As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of invention.

(A)
The sheet structure 10 of the above embodiment has been described with reference to an example used in the wastewater treatment apparatus 50 for purifying wastewater by microorganisms in wastewater. However, the present invention is not limited to this.

  For example, the present invention is applied to an apparatus for separating metal ions, metal compound ions, etc. from a liquid by oxidizing oxygen ions in the liquid to oxidize metal ions, metal compound ions, etc. to form precipitates or precipitates. The sheet structure of the invention may be applied. Alternatively, a device that separates the above metal ions, metal compound ions, etc. from the liquid by reducing metal ions, metal compound ions, etc. in the liquid by supplying a reducing gas into the liquid to form a precipitate or precipitate. The sheet structure of the present invention may be applied to.

  Further, for example, the sheet structure of the present invention may be applied to various apparatuses other than a wastewater treatment apparatus that requires a stable oxygen supply in a liquid.

  For example, the sheet structure of the present invention may be applied to an apparatus for separating a gas dissolved in a liquid. Specific examples include separation of a low molecular weight hydrocarbon compound dissolved in a liquid. In this case, the moving direction of the gas is opposite to that of the embodiment shown above.

(B)
In the said embodiment, the example using the planar sheet | seat structure 10 was given and demonstrated. However, the present invention is not limited to this.

  For example, a structure in which a planar sheet structure is wound may be used, or a sheet structure molded in a cylindrical shape may be used.

(C)
In the said embodiment, the gas delivery layer 11 was inserted from the opening 21b of the gas-permeable impermeable layer 21 shape | molded in the bag shape, and the example which comprised the sheet structure 10 was demonstrated and demonstrated. However, the present invention is not limited to this.

  For example, the gas permeable impermeable layer may be laminated and adhered to the surface of the gas delivery layer.

  As the part to be bonded, only the outer periphery of the gas permeable impermeable layer may be bonded, or if gas can be supplied to the gas permeable impermeable layer, the gas permeable impermeable layer The layer and the gas delivery layer may be bonded on the entire surface.

(D)
In the said embodiment, the example using the gas delivery layer 11 containing the rib-shaped core material 12a, the front liner 12b, and the back liner 12c was demonstrated and demonstrated. However, the present invention is not limited to this.

  For example, as shown in FIG. 18, a front liner (one of the first liners) having a corrugated core member (supporting part) 412a in a cross-sectional view arranged along the gas flow path S and having a plurality of gas passage holes 413 formed therein. 1 side) A hollow plate member 412 disposed between 412b and the back liner 412c may be used as the gas delivery layer 411.

(E)
In the third and fourth embodiments described above, examples in which the gas delivery layers 211 and 311 are respectively configured by combining two honeycomb structure members of the first structures 212 and 312 and the second structures 213 and 313 will be described. did. However, the present invention is not limited to this.

  For example, the gas delivery layer may be configured by combining three or more honeycomb structure members.

  Here, the results verified by comparing the treatment capability of purifying at least one organic substance or nitrogen source contained in the waste water W with the comparative example using the sheet structure 10 of the present invention described above are shown in FIG. Shown in

(Evaluation of organic matter removal rate)
A sheet structure 10 having a height of 90 cm and a width of 60 cm is installed in an evaluation tank capable of storing simulated wastewater having the following composition, and the evaluation tank is filled with simulated wastewater, and 5 g of soil microorganisms are added as microorganisms responsible for organic matter decomposition. did. The wastewater treatment performance was evaluated by continuously flowing in and out the simulated wastewater. The size of the evaluation tank and the flow rate of the simulated waste water were adjusted so that the organic area load was 13 g COD / m ² · d, and the organic volume load was 0.3 kg COD / m ³ · d. The evaluation tank maintained the water temperature in the evaluation tank at 27 ± 3 ° C. by installing a heater in the tank.

<Composition of organic substance-containing water>
Soluble starch: 0.8 g / L, peptone: 0.084 g / L, yeast extract: 0.4 g / L, urea: 0.052 g / L, CaCl2: 0.055 g / L, KH2PO4: 0.017 g / L, MgSO4 · 7H2O: 0.001 g / L, KCl: 0.07 g / L, NaHCO3: 0.029 g / L.

Moreover, the tap water in the Kyoto laboratory of Sekisui Chemical Co., Ltd. was used as a solvent.
The CODCr concentration A (mg / L) of the influent water and the CODCr concentration B (mg / L) of the effluent water were measured after 28 days, 29 days, and 30 days, and the above-mentioned r of 3 calculated by the following relational expression was measured. The average value of the points was defined as the organic matter removal rate R (%).

r = (A−B) / A × 100
The CODCr concentration was measured according to a protocol defined by the product using an absorbance-type water quality meter photoLab7600UV-VIS and VARIO COD measurement reagent LR manufactured by WTW. When the CODCr concentration exceeded the measurement range of the measurement reagent, the sample to be measured was diluted with ion-exchanged water so as to be within the measurement range, and the measured value was multiplied by the dilution factor to obtain the measured value of the CODCr concentration.

In the present embodiment, as the gas delivery layer 11, the arrangement of the rib-shaped core material is a straight line, and the rib-shaped core material is composed of a plate-shaped front sheet (liner) and a plate-shaped back sheet (liner). A plastic corrugated board made by Yamako Co., Ltd. (thickness: 5 mm, weight per unit area: 800 g / m ² ), which is a hollow plate-like member configured to be sandwiched between the ^two, was used.

  On this plastic cardboard, a roll having a plurality of needles on its surface was rotated, and the plastic cardboard was passed between the roll and a plane, thereby forming a plurality of gas passage holes 13 on the surface of the plastic cardboard.

  The dimensions of the gas passage holes 13 were about 2 mm in width and about 1 mm in length, and the ratio of the total area of the gas passage holes in the surface (opening ratio) was about 2%.

  As the gas permeable impermeable layer 21, a sheet in which a nonwoven fabric is laminated on a gas permeable waterproof film (manufactured by Sekisui Chemical Co., Ltd., Serpore NW07H, holding nonwoven fabric on both sides) is used as the gas permeable impermeable layer 21. The layer was laminated so that the portion of the At this time, the length of water contact with the waste water W with respect to the length of the gas flow path S of the sheet structure was 90%.

  The sheet structure 10, which is a laminate of the gas delivery layer 11, the fabric 131, and the gas permeable impermeable layer 21, was installed in the wastewater treatment tank 51 so that the wastewater W did not enter the gas delivery layer 11.

  As a result, the organic matter removal rate was 72%.

  In this example, the same sheet structure as in Example 1 was used except that the ratio (opening ratio) of the gas passage holes 13 of the gas delivery layer 11 was changed from about 2% to 10%. .

  As a result, when the sheet structure was used, the organic matter removal rate was 85%.

  In this example, the same sheet structure as in Example 1 above was used except that the ratio (opening ratio) of the gas passage holes 13 in the gas delivery layer 11 was changed from about 2% to about 55%. It was.

  When this sheet structure was used, the organic matter removal rate was 87%.

  In this example, the same sheet structure as in Example 1 above was used except that the ratio (opening ratio) of the gas passage holes 13 in the gas delivery layer 11 was changed from about 2% to about 78%. It was.

  As a result, when the sheet structure was used, the organic matter removal rate was 89%.

  In this example, a sheet structure similar to that of Example 2 was used except that the nonwoven fabric on the gas delivery layer side was removed from the air-permeable waterproof film NW07H.

  When this sheet structure was used, the organic matter removal rate was 67%.

  In this example, Example 5 except that a fabric (nonwoven fabric manufactured by Toyobo Co., Ltd., Borans 7217P, basis weight 220 g / m 2, thickness 0.9 mm) was laminated between the gas permeable waterproof film and the gas delivery layer. The same sheet structure was used.

  When this sheet structure was used, the organic matter removal rate was 85%.

  In this example, except that a fabric (non-woven fabric manufactured by Unitika Ltd., 82607 WSO, basis weight 260 g / m 2, thickness 0.7 mm) was laminated between the gas permeable waterproof film and the gas delivery layer, A similar sheet structure was used.

  When this sheet structure was used, the organic matter removal rate was 78%.

  In this example, the above example 5 was used except that a cloth (non-woven fabric manufactured by Unitika, Elves II, basis weight 30 g / m 2, thickness 0.1 mm) was laminated between the gas permeable waterproof film and the gas delivery layer. The same sheet structure was used.

  When this sheet structure was used, the organic matter removal rate was 72%.

In this embodiment, a plastic corrugated board manufactured by Yamako Co., Ltd. (thickness 12 mm, basis weight 1800 g / m ² ) is used as the gas delivery layer 11, and the ratio of the sum of the gas passage holes 13 of the gas delivery layer 11 (opening ratio) Was changed from about 2% to about 5%, and the same sheet structure as in Example 1 was used.

  When this sheet structure was used, the organic matter removal rate was 86%.

In this example, a fluidized bed carrier XE-55Z (made of high-density polyethylene, outer diameter 55 mm, inner diameter 47 mm, open area ratio 44%, basis weight 990 g / m ² ) manufactured by Zebioplast was used as the gas delivery layer 11. .

  The fluidized bed carrier was cylindrical, but the fluidized bed carrier was connected in the height direction of the cylinder so that the height was 900 mm, and was used as the cylindrical gas delivery layer 11.

  A sheet (cell pore NW07H) in which a nonwoven fabric is laminated on a gas permeable waterproof film is laminated on the cylindrical gas delivery layer 11 so that the nonwoven fabric portion is in contact with the waste water W as a gas permeable impermeable layer 21. A sheet structure 10 was used. At this time, the water contact length to the waste water with respect to the length of the gas flow path S of the sheet structure 10 was 90%.

  The laminated body of the gas delivery layer 11 and the gas permeable impermeable layer 21 was installed in the wastewater treatment tank 51 so that the wastewater W did not enter the gas delivery layer 11. In the present embodiment, unlike the first to ninth embodiments, the above-mentioned seven laminated bodies having a height of 900 mm are linearly arranged in the diameter direction of the cylindrical circle of the gas delivery layer and installed in the wastewater treatment tank 51. did.

  As a result, the organic matter removal rate was 70%.

Implemented except that Dainippon Plastics Netron Pipe P-N1.5 (polypropylene, outer diameter 35 mm, inner diameter 28 mm, aperture ratio 28%, basis weight 1130 g / m ² ) was used as the gas delivery layer 11. A sheet structure 10 similar to that in Example 10 was used. In the present example, twelve laminated bodies were arranged linearly in the diameter direction of the cylindrical circle of the gas delivery layer and installed in the wastewater treatment tank 51.

  As a result, the organic matter removal rate was 77%.

Comparative Example 1

  In this comparative example, a sheet structure similar to that of Example 1 was used except that the gas transmission hole 13 was not provided in the gas delivery layer 11.

  As a result, the organic matter removal rate was 22%, and the organic matter was treated anaerobically.

Comparative Example 2

  As a comparative example of Examples 1 and 2 above, the gas delivery layer uses a corrugated sheet made of polyvinyl chloride resin manufactured by Takiron Sea Eye Co., Ltd. (hard vinyl vinylamita, slate wave, pitch about 63 mm, valley depth 18 mm), and no fabric Except for these points, sheet structures similar to those in Examples 1 and 2 were prepared.

  In this comparative example, a sheet structure, which is a laminate of a gas delivery layer and a gas permeable impermeable layer, was installed in the wastewater treatment tank so that the wastewater did not enter the gas delivery layer.

As a result, the organic matter removal rate decreased to 60%.
Thus, when the results of Examples 1 to 9 and Comparative Example 1 are compared, since the gas permeation hole 13 is not used in the gas delivery layer 11, oxygen cannot be supplied satisfactorily even if a fabric is used, and aerobic. Could not contribute to the activation of microorganisms. Therefore, the efficiency of organic matter removal rate was poor.

  In addition, when the results of Examples 1 to 9 and Comparative Example 1 are compared, the gas permeable impermeable layer follows the corrugated plate by water pressure because the corrugated plate is used instead of the corrugated board material as the gas delivery layer. As a result, the gas flow path has become narrow. As a result, it was found that oxygen from the gas supply source was not sent to the aerobic microorganisms, and the organic matter removal rate was lowered.

  Further, in Examples 1 to 4 and 6 to 9, since the cloth is interposed between the gas delivery layer and the gas permeable impermeable layer, the space in the normal direction is widened so that the supply of oxygen is not delayed. It was found that organic substances were removed efficiently.

  Moreover, although the fabric is not used in Example 5, since the corrugated cardboard of the hollow plate member is used for the sheet structure as compared with Comparative Example 2, the gas-permeable impermeable layer is less likely to follow, It was found that organic substances could be removed efficiently.

  Since the sheet structure of the present invention has an effect that a gas delivery amount in the gas delivery layer (gas flow path) can be sufficiently secured, gas is supplied into the liquid while being immersed in the liquid. Widely applicable to various devices.

10 Sheet Structure 11 Gas Delivery Layer 12 Corrugated Cardboard Material (Hollow Plate Member)
12a Core material (support part)
12b Front liner (one first surface, support part)
12c Back liner (the other first side, support part)
13 Gas passage hole 21 Gas permeable impermeable layer 21a Surface 21b Opening 21c Heat welding part 50 Waste water treatment apparatus 51 Waste water treatment tank 51a Inlet 51b Outlet 52 Purification unit 53 Gas supply source 110 Sheet structure 111 Gas delivery layer 113 Gas passage hole 121 Gas permeable impermeable layer 131 Fabric 211 Gas delivery layer 212 First structure (honeycomb structure)
212a Gas passage hole 213 Second structure (honeycomb structure)
213a Gas passage hole 311 Gas delivery layer 312 First structure (honeycomb structure)
312a Gas passage hole 313 Second structure (honeycomb structure)
313a Gas passage hole 411 Gas delivery layer 412 Corrugated cardboard material (hollow plate member)
412a Core material (support part)
412b Front liner (one first surface, support part)
412c Back liner (the other first surface, support part)
413 Gas passage hole F1, F2 Film R1, R2 Roll S Gas flow path W Waste water

Claims (14)

A sheet structure for supplying a gas supplied from a gas supply source into the liquid while being immersed in the liquid,
A gas delivery layer having a first surface and delivering the gas supplied from the first end side in a first direction;
A gas passage hole formed in the first surface;
A gas permeable impermeable layer covering the first surface, having the property of allowing the gas to permeate outward and impervious outer liquid to permeate;
A sheet structure comprising: The gas delivery layer has a support part that forms a gas flow path,
The first surfaces are arranged to face each other with the support portion interposed therebetween.
The sheet structure according to claim 1. The gas permeable impermeable layer has, on its surface, a microorganism adhesion part to which microorganisms contained in the liquid adhere.
The sheet structure according to claim 1 or 2. The gas permeable impermeable layer has a bag shape with an opening formed on the first end side,
The sheet structure according to any one of claims 1 to 3. The gas delivery layer is constituted by a hollow plate-like member having a plurality of the gas flow paths formed along the first direction.
The sheet structure according to any one of claims 1 to 4. The material of the hollow plate-shaped member is any one of paper, resin, and metal.
The sheet structure according to claim 5. A fabric is laminated between the gas delivery layer and the gas permeable impermeable layer,
The sheet structure according to any one of claims 1 to 6. The material of the fabric is any one of a woven fabric, a mesh sheet, a nonwoven fabric, and a pore membrane.
The sheet structure according to claim 7. The gas delivery layer has a plurality of first gas passage holes on one of the first surfaces, and has a plurality of second gas passage holes on the other first surface, with respect to the first gas passage holes. The plurality of second gas passage holes are located at positions shifted in the first direction.
The sheet structure according to any one of claims 1 to 4. A purification unit comprising the sheet structure according to any one of claims 1 to 9,
Waste water is stored, and a waste water treatment tank in which at least a part of the sheet structure included in the purification unit is immersed,
Wastewater treatment equipment equipped with. A power unit for sending gas into the gas delivery layer of the sheet structure,
The wastewater treatment apparatus according to claim 10. It is a manufacturing method of the sheet structure according to any one of claims 1 to 8,
An arrangement step of arranging the gas delivery layer;
A hole forming step of forming the gas passage hole on the first surface facing the gas permeable impermeable layer in the gas delivery layer using a needle material having a needle disposed on the surface;
A covering step of covering the gas delivery layer in which the gas passage hole is formed on the first surface with the gas permeable impermeable layer;
The manufacturing method of the sheet | seat structure provided with. The needle material has a roll-shaped main body portion and a plurality of needles arranged on the surface of the main body portion.
The manufacturing method of the sheet | seat structure of Claim 12. In the covering step, the gas delivery layer is inserted from the opening of the bag-like gas-permeable impermeable layer having an opening on the first end side.
The manufacturing method of the sheet structure of Claim 12 or 13.

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