JP5739207B2 - Biological carrier and septic tank - Google Patents

Description

  The present invention relates to a biological carrier disposed in a treatment tank that decomposes a target substance in a fluid to be treated by microorganisms, and a purification tank equipped with the biological carrier.

  In a treatment tank such as a septic tank, it is known that, among living organisms, the amount of treatment increases when the contact area with a fluid to be treated is widened for a carrier where microorganisms adhere and inhabit the fluid to be treated. Yes. For this reason, conventionally, the surface shape of the supporting portion has been complicated so that the contact area with the fluid to be treated becomes large.

  For example, in the septic tank described in Patent Document 1, a plurality of mesh-shaped cylindrical filter media are separated from an anaerobic treatment tank (in the literature, “anaerobic filter bed tank”) or an aerobic treatment tank (in literature, “contact aeration tank”). In a container with the same shape as above, spray the adhesive with a spray gun to bond the filter media together, or pack the filter media in a basket-shaped case that matches the shape of the anaerobic treatment tank or aerobic treatment tank Thus, a biological carrier having a wide contact area with the fluid to be treated has been manufactured by immersing it in an adhesive and bonding the filter media together.

  Further, in the septic tank described in Patent Document 2, in the anaerobic treatment tank ("anaerobic filter bed tank" in the literature), a supporting portion ("filter medium" in the literature) is provided in the space between the filter medium presser plate and the filter medium mounting plate. A biological carrier having a large contact area with the fluid to be treated was filled.

Japanese Utility Model Publication No. 4-65200 (page 4, FIGS. 2 and 3) JP-A-10-128352 (paragraphs [0012] to [0015], FIG. 1)

  However, the biological carrier described in Patent Document 1 requires a process for producing the carrying part and a process for adhering the carrying parts to each other. Further, in the case of the biological carrier described in Patent Document 2, when one biological carrier is disposed in the anaerobic treatment tank, an operation for fixing the filter medium mounting plate to the anaerobic treatment tank and an operation for filling the carrier part And the work of fixing the filter material presser plate to the anaerobic treatment tank is required three times, and the work efficiency is poor.

  This applies not only to the septic tank but also to a processing tank that uses other biological carriers such as various deodorizing towers.

  An object of the present invention is to provide a biological carrier that does not require a lot of production work and has a high efficiency in attaching work to a treatment tank.

The first characteristic configuration of the biological carrier according to the present invention is a biological carrier disposed in a treatment tank that decomposes a target substance in a fluid to be treated by microorganisms, and the microorganisms adhere and inhabit, A supporting portion through which a processing fluid can flow, and an attachment portion that is incapable of flowing the processing fluid and is formed in a frame shape surrounding the supporting portion, and is attached to the processing tank while holding the supporting portion. The attachment portion is formed in a shape corresponding to a cross-sectional shape of the treatment tank to which the biological carrier is attached , and the carrier portion and the attachment portion are integrally molded.

  With this feature configuration, the attachment portion for attaching the carrier portion to the treatment tank is molded integrally with the carrier portion, so that the labor for producing the biological carrier can be reduced as compared with the conventional case. Moreover, only one operation | work which fixes an attaching part to a processing tank can arrange | position one biological carrier to a processing tank, and attachment work efficiency is good.

  According to a second characteristic configuration of the biological carrier according to the present invention, the carrier part includes a plurality of carrier bodies, the carrier body is formed in a tapered hollow shape protruding along a predetermined direction, and the attachment part is formed. , All the carriers are formed in a frame shape surrounding the base side position.

  According to this characteristic configuration, the carrier protrudes along a predetermined direction and is formed in a tapered hollow shape. Therefore, the carrier is separated from the inside (cavity portion) of the carrier of a certain biological carrier. It is possible to stack a plurality of biological carriers in a compact manner by inserting the biological carriers in a predetermined direction. That is, with this feature configuration, while improving the manufacturability of the biological carrier and the ease of assembly to the treatment tank as described above, it is also possible to keep stock from the production to assembly in the treatment tank. And space saving during transportation.

In addition, as long as it protrudes along a predetermined direction, it may be either a carrier that protrudes from the attachment portion toward one side or a carrier that protrudes from the attachment portion toward the other side. Even if it has a carrier that protrudes in different directions, the biological carrier can be taken into consideration if it is possible to pull out the mold at the time of manufacture and that both of them protrude along the same predetermined direction. When stacking, the carrier projecting in one direction in one biological carrier and the carrier projecting in the other side in another biological carrier do not interfere with each other, and clean multiple biological carriers Can be stacked.
A third characteristic configuration of the biological carrier according to the present invention is that the carrier has a tapered hollow shape, and includes a tip member, a side circumferential member, a root member, and a plurality of elongated rod-shaped vertical rib members. The tip member, the side peripheral member, and the root member are arranged at intervals, and are formed in a mesh shape supported by a plurality of longitudinal rib members arranged in the circumferential direction, and the support portions are adjacent to each other The supporting bodies include a plurality of the supporting bodies that are connected to each other by the root members, and the frame portion is the outermost supporting body in plan view among the supporting bodies of the supporting section. It is connected and formed in a frame shape surrounding the plurality of carriers at the position of the base member.

A fourth feature of the biological carrier according to the present invention is a biological carrier disposed in a treatment tank that decomposes a target substance in a fluid to be treated by microorganisms, and the microorganisms adhere to and inhabit, A carrier part through which a processing fluid can flow and an attachment part attached to the treatment tank while holding the carrier part, and integrally molding the carrier part and the attachment part. The carrier is formed in a tapered hollow shape projecting along a predetermined direction, and the mounting portion is formed in a frame shape surrounding all the carriers at the root side position , The mounting portion has a bilaterally symmetric shape when viewed along the predetermined direction, and the carrier is arranged asymmetrically with respect to the predetermined central direction across the symmetry center line of the mounting portion. The biological carrier is inverted about the symmetry center line. The other biological carrier, when the attachment positions of the mounting portions are aligned and close to each other along the predetermined direction, the other biological carrier between the carrier and the other It is that at least a part of the carrier in the biological carrier can be inserted.

  As described above, the biological carrier should be configured to have a large contact area with the fluid to be treated, but this does not mean that the surface area of the biological carrier should be widened in a dark cloud. Since the space for installing the biological carrier in the treatment tank is limited, it is not preferable that the volume occupied by the biological carrier is increased by increasing the surface area of the biological carrier. Therefore, it is important to increase the surface area ratio of the biological carrier in a certain volume space, that is, to increase the area efficiency of the biological carrier.

  According to this characteristic configuration, when one biological carrier is reversed (turned over) with respect to one biological carrier around the symmetry center line, and the two biological carriers are brought close to each other, Between the bodies, at least a part of the carrier of the other biological carrier enters. Similarly, at least one of the carriers of one biological carrier enters between the carriers of the other biological carrier. Therefore, it is possible to stack a plurality of biological carriers in a predetermined direction so that the opposite carriers overlap each other, and the occupied volume as a whole can be reduced. Thus, by stacking a plurality of biological carriers, the area efficiency of the biological carriers is improved as a whole.

  Furthermore, according to this feature configuration, even if a plurality of organism carriers are stacked, the outer positions of the respective mounting portions are aligned, so that the plurality of organism carriers have a compact shape as a whole, improving the area efficiency of the organism carrier. And a small installation space in the processing tank.

A fifth characteristic configuration of the biological carrier according to the present invention includes an engagement portion on an outer peripheral portion of the carrier, and the biological carrier in the other biological carrier is between the carrier in one biological carrier. When at least a part of the carrier is inserted, the engaging portion of the carrier in one of the biological carriers can be engaged with the engaging portion of the carrier in the other biological carrier. In that point.

  With this feature configuration, the relative start of the plurality of biological carriers is restricted by the engagement between the engaging portions. For example, when three or more biological carriers are disposed in the treatment tank, If only the most upstream biological carrier and the most downstream biological carrier are fixed to the treatment tank, the intermediate layer can be formed by engaging the engaging portion without fixing the biological carrier as the intermediate layer to the treatment tank. The biological carrier to be obtained can be held in the treatment tank. That is, it is only necessary to fix at least the uppermost biological carrier to the treatment tank, and the assemblability is very good. Further, even if the processing tank is driven to circulate the fluid to be processed, the biological carriers are not displaced from each other, so that a short circuit path does not occur unexpectedly, and the fluid to be processed can be reliably circulated through the supporting portion.

The sixth characteristic configuration of the biological carrier according to the present invention is that the mounting portion has a symmetrical shape when viewed along the predetermined direction, and the carrier is viewed along the predetermined direction. It is arranged symmetrically with respect to the symmetry center line of the attachment part, and the biological carrier is inverted around the symmetry center line so that the outline of each of the attachment parts is different from the other biological carrier. When approaching along the predetermined direction while aligning the position, the tip of the carrier in one of the organism carriers and the tip of the carrier in the other organism carrier are face-to-face In addition, the front end of the carrier projecting in the same direction is provided with an engaging portion, and the engaging portion is disposed asymmetrically with respect to the center line of symmetry. In the tip of the carrier and the other biological carrier When the tip of the carrier is brought into contact with each other, the engaging portion of the carrier in one of the biological carriers and the engaging portion of the carrier in the other biological carrier are: It is in the point which can be engaged .

  As long as the fluid to be treated can flow, various shapes can be adopted as the shape of the carrier based on the type of the treatment tank and the fluid to be treated. That is, there may be a case where a plurality of biological carriers are stacked so that the tip portions of the carriers are flush with each other to increase the surface area of the entire biological carrier. Even in such a case, with this feature configuration, the area efficiency can be improved, and the biological carrier can be disposed in the treatment tank in a compact state.

  In the case of this characteristic configuration, as described above, the assembling property is very good, and a short circuit path does not occur unexpectedly, so that the fluid to be processed can be reliably circulated through the carrier.

  A seventh characteristic configuration of the biological carrier according to the present invention is that the carrier projects in the same direction along the predetermined direction.

  According to this characteristic configuration, the shape of the mold is not complicated compared to the case where the carrier is protruded along the predetermined direction in both the one direction and the other direction. Is easy to make.

  Since the carrier tends to be heavy because of its complicated shape, it is generally formed as a thin member or a thin member. For this reason, the carrier often has relatively low rigidity. Therefore, when the carrier is protruded in both directions and the biological carrier is placed on the floor or the like, there is a carrier that inevitably contacts the floor or the like and supports the load of the entire biological carrier. Therefore, it is necessary to devise and place the carrier so that it is not damaged, and it may be difficult to handle. However, with this feature configuration, the carrier protrudes only on one side, so if it is placed with the mounting part down, the carrier will not touch the floor and the carrier will be damaged. There is no equal. Thus, if it is this characteristic structure, it can be set as the biological carrier easy to handle.

An eighth characteristic configuration of the biological carrier according to the present invention is a biological carrier disposed in a treatment tank that decomposes a target substance in a fluid to be treated by microorganisms, and the microorganisms adhere to and inhabit, A carrier part through which a processing fluid can flow and an attachment part attached to the treatment tank while holding the carrier part, and integrally molding the carrier part and the attachment part. The carrier is formed in a tapered hollow shape projecting along a predetermined direction, and the mounting portion is formed in a frame shape surrounding all the carriers at the root side position , The mounting portion is formed in a shape corresponding to an internal shape of a portion of the processing tank to which the mounting portion is mounted, and is bent and supported on the outer peripheral portion of the mounting portion along the outer peripheral shape of the mounting portion. And the bending support portion When the biological carrier is attached to the treatment tank in a state where the holder is disposed and the bent carrier is bent, the carrier provided in the bent carrier is surrounded by the attachment. Further, the carrier is located in a space between the carrier disposed on the outermost side of the carrier and the inner wall of the processing tank.

  As described above, the carrier is formed in a tapered shape that protrudes along a predetermined direction, and the attachment portion is formed in a frame shape that surrounds all the carriers at the base side position. When the biological carrier is attached to the treatment tank, there is at least the width of the attachment part between the inner wall of the treatment tank and the carrier disposed on the outermost side of the carrier surrounded by the attachment part. A total gap with the width corresponding to the taper of the carrier portion is generated. If this gap is too wide, the fluid to be processed may short-circuit the carrier and the processing capacity of the processing tank may be unexpectedly reduced.

  In the case of this feature configuration, the shape of the attachment portion corresponds to the internal shape of the treatment tank. Therefore, when the bent carrier portion is bent, the biological carrier becomes a shape along the internal shape of the treatment tank. Can be attached to the tank. Then, when the biological carrier is attached to the treatment tank in a state where the bending carrier is bent, the space between the inner wall of the treatment tank and the carrier disposed on the outermost side of the carrier surrounded by the attachment part In addition, a carrier portion disposed on the bending carrier portion is located. In other words, the carrier disposed in the bending carrier portion reduces the gap where the fluid to be treated is short-circuited, and the treatment capacity of the treatment tank is unlikely to be unexpectedly reduced.

A first characteristic configuration of the septic tank according to the present invention is a septic tank in which the biological carrier of the first characteristic configuration is disposed, and includes a processing tank in which a fluid to be processed flows in a vertical direction. The biological carrier is arranged so as to be divided into regions, and the fluid to be treated in the treatment tank is allowed to flow through the carrier part of the biological carrier .

A second characteristic configuration of the septic tank according to the present invention is such that the carrier portion of the biological carrier includes a plurality of carriers, and the tapered cavity projects in the same direction along a predetermined direction. It is formed in a shape, and at least two organism carriers are arranged back to back .
The third characteristic configuration of the septic tank according to the present invention is a bulging portion in which the inner wall is bulged inward of the tank in order to reduce a gap space between the inner wall of the treatment tank and the carrying part of the biological carrier. Is in the point that is provided.
A fourth characteristic configuration of the septic tank according to the present invention is that the bulging portion also serves as means for fixing the biological carrier .

It is a vertical side view of the septic tank concerning the present invention. It is sectional drawing of the II-II direction in FIG. It is a top view of the filter bed board concerning the present invention. It is a vertical side view of a filter bed board. It is a perspective view of a filter bed board. (A) is a schematic plan view which shows the arrangement | sequence state of the support part in a filter bed board, (b) is a schematic side view which shows the overlap state of a support part. It is a perspective view which shows the state which piled up the several filter bed board so that it may arrange | position in an anaerobic processing tank. It is a perspective view which shows the state which piled up the several filter bed board in order to store. It is a longitudinal cross-sectional view of the anaerobic processing tank which concerns on 1st another embodiment. It is a figure explaining the filter bed board which concerns on 2nd another embodiment, Comprising: (a) is a schematic plan view which shows the arrangement | sequence state of the support part and engagement part in a filter bed board, (b) is the engagement of an engagement part. It is a model side view which shows a combined state. (A), (b) is a figure explaining the filter bed board which concerns on 3rd another embodiment. It is a figure explaining the filter bed board which concerns on 4th another embodiment, Comprising: (a) And (b) is a figure which shows the state at the time of storage, (c) and (d) are assembled | attached to an anaerobic treatment tank It is a figure which shows the state at the time. (A), (b) is a side view which shows another embodiment of the shape of a support body. It is a figure which shows another embodiment of a support body, Comprising: (a) is a model side view, (b) is a perspective view. It is a longitudinal cross-sectional view of the anaerobic processing tank which shows the example which expanded the inner wall of the anaerobic processing tank. It is a longitudinal cross-sectional view of the anaerobic processing tank which shows another embodiment of a protrusion part.

  Hereinafter, an example in which the biological carrier and the septic tank according to the present invention are applied to a combined processing septic tank will be described with reference to the drawings.

[Overall configuration of septic tank]
The overall configuration of the septic tank and the flow of the fluid to be treated (for example, human waste and miscellaneous wastewater) will be described with reference to FIGS. The septic tank includes a tank body 1 including an upper housing 1A and a lower housing 1B. The septic tank removes contaminants (sand gravel, fibers, wood pieces, plastic pieces, etc.) in the fluid to be treated from the tank body 1 by the first partition plate 4, the second partition plate 5, and the third partition plate 6. Contaminant removal tank A, anaerobic treatment tank B that decomposes the target substance in the fluid to be treated by anaerobic treatment, an aerobic treatment tank C that decomposes the target substance in the fluid to be treated by an aerobic treatment, and an aerobic treatment It is divided into four tanks, a settling tank D for depositing the later sludge and the like. Above the settling tank D, the water collecting tank E for collecting the supernatant of the processed fluid after the precipitation process, the drug cylinder 13 for storing the drug, and the liquid to be processed are sterilized by the drug added from the drug cylinder 13. And a disinfection tank F for disinfection.

  On the upper side surface of the contaminant removal tank A, an inflow pipe 7 for allowing the fluid to be treated to flow is provided. In the contaminant treatment tank, a baffle plate 9 having a U-shaped cross section and extending from the vicinity of the top of the contaminant removal tank A to the vicinity of the center is disposed so as to surround the inlet of the inflow pipe 7. . The baffle plate 9 regulates the flow direction of the fluid to be processed downward. The fluid to be treated is solid-liquid separated in the contaminant removal tank A, and the impurities contained in the fluid to be treated are precipitated in the contaminant removal tank A.

  The fluid to be treated flows into the anaerobic treatment tank B from the advection port h <b> 1 provided at a position slightly higher than the center of the first partition plate 4. A cover plate 10 having a U-shaped cross section and extending from the vicinity of the upper portion of the anaerobic treatment tank B to the lower side of the anaerobic filter bed 2 described later is transferred to the wall surface of the first partition plate 4 on the anaerobic treatment tank B side. It arrange | positions so that the opening | mouth h1 may be enclosed. By the cover plate 10, the fluid to be treated flowing from the advection port h <b> 1 is guided to the lower side of the anaerobic filter bed 2.

  The anaerobic filter bed 2 is configured by stacking a plurality of filter bed plates 20. The filter bed 20 corresponds to the “biological carrier” according to the present invention. Of the filter bed plate 20, anaerobic microorganisms are attached and inhabited on the carrier 22 (see FIG. 5) composed of a plurality of carriers 22A described later. While the fluid to be treated flows through the anaerobic filter bed 2 from the lower side to the upper side, the organic substance in the fluid to be treated, which is the treatment target material, is decomposed by the anaerobic microorganisms.

  The fluid to be treated that has been anaerobically treated in the anaerobic treatment tank B flows into the aerobic treatment tank C from the communication port h <b> 2 opened in the second partition plate 5. A large number of substantially spherical resin flow carriers 3 are suspended in the aerobic treatment tank C. On the surface of the fluid carrier 3, aerobic microorganisms adhere and inhabit in a film form. A diffuser tube 11 is disposed near the bottom of the aerobic treatment tank C, and air is sent from the blower 14 provided outside the tank body 1 to the diffuser pipe 11 through the air supply pipe 12. The air diffuser 11 is provided with a plurality of air diffuser holes, and the air fed into the air diffuser 11 is discharged to the aerobic treatment tank C from the air diffuser holes. The fluid carrier 3 is exposed to the air (aerated) while stirring the fluid to be treated and the fluid carrier 3 with the released air. As a result, the membrane of the aerobic microorganism and the fluid to be treated are repeatedly contacted, and the organic matter and the nitrogen compound in the fluid to be treated, which is the material to be treated, are decomposed and oxidized by the aerobic microorganism.

  The to-be-treated fluid subjected to the aerobic treatment is transferred to the precipitation tank D from between the lower end of the third partition plate 6 and the bottom surface of the aerobic treatment tank C. Sludge and the like in the fluid to be treated are deposited on the bottom surface of the sedimentation tank D. The sludge that has settled on the bottom surface of the sedimentation tank D is sucked up by the first air lift pump 15 extended to the vicinity of the bottom of the sedimentation tank D, and returned to the contaminant removal tank A together with the fluid to be treated through the sludge return pipe 17. .

  The supernatant fluid to be treated in the sedimentation tank D flows into the water collection tank E through the communication port h3. The fluid to be treated that has flowed into the water collection tank E is sucked up by the second air lift pump 16 extended to the vicinity of the bottom of the water collection tank E and flows into the disinfection tank F. A chemical cylinder 13 is disposed above the sterilization tank F, and the fluid to be treated that has flowed into the sterilization tank F is sterilized with the chemical added from the chemical cylinder 13. The sterilized fluid to be treated is finally discharged from the discharge pipe 8 to the outside.

  Two manholes 18 are provided in the upper part of the septic tank. The manhole 18 is opened to perform maintenance and inspection of the septic tank and to collect sludge.

[About filter bed]
As shown in FIGS. 3 to 5, the filter bed plate 20 is composed of a plurality of carriers 22 </ b> A to which microorganisms adhere and inhabit, and a carrier portion 22 through which a fluid to be treated can flow and anaerobic while holding the carrier portion 22. And a frame portion 21 as an “attachment portion” to be attached to the processing tank B. The filter floor plate 20 is made of resin, and the carrier portion 22 and the frame portion 21 are integrally injection-molded.

  As shown in FIG. 4, the carrier 22 </ b> A projects along a projecting direction L as a “predetermined direction” and is formed in a tapered cylindrical shape (conical shape) with a cup lying down. That is, the inside of the carrier 22A is a cavity, and the base side is greatly open. The carrier 22A includes a tip member 22a, two side peripheral members 22b, a root member 22c, and a vertical rib member 22d. The tip member 22a has a bowl-like shape, the side circumferential member 22b and the root member 22c have a wide ring shape, and the vertical rib member 22d has a conical shape extending in the height direction. Shape.

  The tip member 22a, the two side peripheral members 22b, and the root member 22c are arranged at intervals, and are supported from the inner peripheral side by the longitudinal rib members 22d at six locations in the circumferential direction. A circular opening is provided at the top of the tip member 22a. That is, the carrier 22A has a mesh shape in a broad sense, and the fluid to be treated can circulate the mesh. Note that the number of the side peripheral members 22b and the vertical rib members 22d may be appropriately changed depending on the size and overall strength of the carrier 22A.

  As shown in FIG. 3, the frame portion 21 is formed in a frame shape that surrounds all the carriers 22A at the position of the root member 22c. The frame portion 21 is formed in a shape corresponding to the horizontal cross-sectional shape of the anaerobic treatment tank B. In plan view, the central portion of the frame portion 21 is recessed, but this recessed portion is for conforming to the shape of the cover plate 10. As a result, when the filter floor plate 20 is assembled to the anaerobic treatment tank B, no unnecessary gap is generated between the frame portion 21 and the wall surface around the frame portion 21. Further, the frame portion 21 has a left-right symmetrical shape with the symmetry center line M interposed therebetween as viewed along the protrusion direction L (the inner shape of the anaerobic treatment tank B is also left-right symmetrical). As shown in FIGS. 3 to 5, the upper surface of the frame portion 21 has a certain width in a plan view and has a flat shape, and the entire frame portion 21 extends along a plane orthogonal to the projection direction L. It is formed.

  As shown in FIGS. 3 and 4, the carrier 22 </ b> A is aligned so that the bottom surfaces 22 e as “bottom portions” are positioned on the same plane so as to protrude in only one direction with respect to the frame portion 21. Thus, they are arranged most densely (in a staggered manner) inside the frame portion 21. Since the carriers 22A are arranged most densely, as shown by the thick lines in FIG. 6 (a), the three adjacent carriers are arranged so that their centers draw the smallest equilateral triangle. One carrier is adjacent to six carriers. As shown in FIGS. 3 and 4, the support 22 </ b> A and the support 22 </ b> A that are adjacent to each other are connected to each other by their root members 22 c. Out of all the carriers 22A, the outermost carrier 22A in plan view is connected to the frame portion 21.

  With the above configuration, as shown in FIG. 5, the filter bed plate 20 has a complicated shape in which a large number of carriers 22 </ b> A are clustered in one direction along the protrusion direction L from the planar frame portion 21. Yes. In the following description of the filter bed plate 20, for the sake of convenience, the side of the tip member 22a (side on which the carrier 22A protrudes) is referred to as “front”, and the side of the root member 22c is referred to as “back”, “back”, and the like. Similarly, a state in which the tip member 22a is directed upward is referred to as “frontward”, and a state in which the root member 22c is directed upward is referred to as “backward”.

[Anaerobic filter bed]
As shown in FIGS. 1, 2, and 7, the anaerobic filter bed 2 is configured by stacking four filter bed bodies from the lower side in the reverse direction, the front side, the back side, and the front side. It is arranged. As for the anaerobic filter bed 2 as a whole, the support 22A protrudes downward at the bottom, and the support 22A protrudes upward at the top of the anaerobic filter bed 2. In the portion in which the two filter bed plates 20 are stacked back to back, the two filter bed plates 20 do not have any overlapping portions in the protrusion direction L. Duplicate at L.

  The overlapping of the carriers 22A will be described in detail. As shown by a solid line in FIG. 6A, the carrier 22A is arranged asymmetrically with respect to the symmetry center line M. When the filter bed 20 is inverted (turned over) around the symmetry center line M, the inverted support 22A is arranged as shown by a broken line in FIG. 6A, and is inverted from the center of the regular triangle described above. The center of the carrier 22A coincides. Further, since the carrier 22A has a tapered shape, a wide gap is formed in a region surrounded by the vicinity of the tip members 22a of the three neighboring carriers 22A. Accordingly, as shown in FIG. 6 (b), the filter bed 20 that has been turned upside down with respect to a certain filter bed 20 facing the front is replaced with the outer peripheral portion 21b of each frame portion 21 ("outer" according to the present invention). ), The carrier 22A of the back-facing filter bed 20 is inserted into the above-mentioned wide gap in the front-facing filter bed 20 (fitting). Included).

  Since the opposing carriers 22A overlap with each other in this way, the stacking height in the protrusion direction L is shortened. That is, the anaerobic filter bed 2 has a very complicated shape as a whole and has a small occupied volume, so that the area efficiency of the filter bed plate 20 is improved as a whole, and the treatment capacity of the anaerobic treatment tank B is improved. improves. Moreover, since the frame part 21 is formed so that the plane orthogonal to the protrusion direction L may be followed, and the position of the outer peripheral part 21b of each frame part 21 is aligned, the anaerobic filter bed 2 is compact as a whole. The area efficiency of the filter bed 20 can be improved most, and the installation space in the anaerobic treatment tank B can be reduced.

  As shown in FIG. 6B, when the carriers 22A are overlapped with each other, the bottom 22f of the outer periphery of the tip member 22a in one filter bed 20 is bitten with the bottom 22f of the line end in the other filter bed 20 Engage with each other. As a result, the relative movement of the two filter bed plates 20 in the direction away from each other is restricted. Further, the apex angle portion 22g of one side circumferential member 22b and the side portion 22h of the other tip member 22a abut each other. As a result, the relative movement of the two filter bed plates 20 in the directions approaching each other is restricted. As a result, the two filter bed plates 20 are positioned with respect to each other and maintain their relative positions. That is, the bottom portion 22f, the apex angle portion 22g, and the side portion 22h correspond to the “engagement portion” according to the present invention.

[Assembly of anaerobic filter bed]
The assembly of the anaerobic filter bed 2 to the anaerobic treatment tank B will be described. As shown in FIGS. 1 and 2, the anaerobic filter bed 2 is disposed over the upper housing 1A and the lower housing 1B. As shown in FIG. 1, each of the first partition plate 4 and the second partition plate 5 is provided with a protruding portion 1 b that bulges in the tank inner direction, and the frame portions 21 of the upper and lower filter bed plates 20 that are back to back are It inserts between the protrusion parts 1b. At the same time, as shown in FIG. 5, both sides of the frame portion 21 are provided with flange portions 21a, and as shown in FIG. 2, the upper housing 1A and the lower housing 1B are each provided with a locking portion 1a protruding in the tank interior direction. The engaging portion 1a is sandwiched between the flange portions 21a of the upper and lower filter bed plates 20 that are back to back.

  That is, in one place, the two filter bed plates 20 that are back-to-back by the member (projecting portion 1b) on the tank body 1 side are sandwiched, and in another place, the two filter bed plates 20 that are back-to-back are used. The side member (locking portion 1a) is clamped. Thereby, the two filter bed boards 20 back-to-back can be reliably held in the tank body 1 without being fixed to each other. In addition, even if the protrusion part 1b and the latching | locking part 1a are a thing with a long width | variety, a width | variety may be short and it may be a partial thing.

  The upper housing 1A and the lower housing 1B are provided with at least one portion having an internal shape corresponding to the outer peripheral shape of the filter bed plate 20 so that the filter bed plate 20 having the same shape can be used.

  Further, in FIG. 1, four protrusions 1b are provided at different positions in the vertical direction, and the first and second filter floor plates 20 from the bottom are formed by the first and second protrusions 1b from the bottom. The third and fourth filter floor plates 20 from below are sandwiched between the third and fourth protrusions 1b from below. However, as described above, with respect to the filter plate 20 facing the second step from the bottom and the filter plate 20 facing the third step from the bottom, the engagement portions 22f, 22g, and 22i are engaged with each other. Since the uppermost filter bed 20 and the lowermost filter bed 20 are sandwiched, the second and third protrusions 1b from the bottom may not be provided.

  Since it is such a structure, the assembly | attachment to the anaerobic processing tank B of the anaerobic filter bed 2 does not require the hardware only for an assembly | attachment, or an exclusive operation | work, and the upper housing 1A, the lower housing 1B, and the 1st partition plate 4 and the second partition plate 5 can be easily performed in a series of operations.

  In addition, since at least the uppermost filter bed 20 is face up (the support 22A is upward), sludge or the like that naturally settles in the anaerobic treatment tank B or is naturally returned from the aerobic treatment tank C In addition, it does not deposit so much on the tip part of the carrier 22A (upper part of the tip member 22a), but is deposited on the upper surface of the frame part 21 or the like, or passes through the anaerobic filter bed 2 and deposits on the bottom surface of the anaerobic treatment tank B To do. That is, naturally settled sludge, naturally returned sludge and the like are deposited at a position away from the water surface. Therefore, even if the fluid to be treated newly newly flows into the anaerobic treatment tank B, it is possible to reduce the accumulated sludge and the like from flowing into the aerobic treatment tank C again. Further, even if the accumulated sludge is wound up by a new fluid to be treated, the momentum of the fluid to be treated is buffered while the fluid to be treated flows through the carrier 22A. Is difficult to flow into the aerobic treatment tank C.

[Inventory storage of filter floor boards]
When storing the filter bed 20, as shown in FIG. 8, all the filter beds 20 are stacked face up. Specifically, with the positions of the outer peripheral portions 21b of the frame portion 21 being aligned, the carrier 22A on the lower filter bed 20 is inserted into the carrier 22A of the corresponding upper filter bed 20 while a plurality of The filter floor plates 20 are stacked. Since the upper carrier 22A and the lower carrier 22A completely overlap, even if one filter bed 20 is stacked, the stacking height in the protruding direction L increases only by the thickness of the frame portion 21. Therefore, it does not take up space during inventory storage or transportation.

[First embodiment]
In the above-described embodiment, when the anaerobic filter bed 2 is configured, the two filter bed plates 20 (for example, the second-stage filter bed plate 20 and the third-stage filter bed plate 20 from the bottom in FIG. 2) support each other. The body 22A was overlapped to increase the area efficiency. Therefore, the arrangement of the support 22A is an asymmetric arrangement with the symmetry center line M in between. However, the arrangement of the carrier 22A may be a symmetrical arrangement with respect to the symmetry center line M. In this case, for example, as shown in FIG. 9, anaerobic is performed such that the support 22A in the third-stage filter bed 20 is inserted between the support 22A in the second-stage filter bed 20 from the bottom. What is necessary is just to crank the inner wall (the tank main body 1, the 1st partition plate 4, the 2nd partition plate 5) of the processing tank B between the 2nd stage filter bed board 20 and the 3rd stage filter bed board 20 from the bottom. .

[Second Embodiment]
In the above-described embodiment, when the anaerobic filter bed 2 is configured, the two filter bed plates 20 (for example, the second-stage filter bed plate 20 and the third-stage filter bed plate 20 from the bottom in FIG. 2) support each other. The body 22A was overlapped to increase the area efficiency. However, it is not always necessary to overlap the carrier 22A. For example, in the case where the mesh shape of the carrier 22A is different, as shown in FIG. 10B, it may be preferable that the top surfaces of the tip member 22a as the “tip portion” are face-to-face. .

  In this case, as shown in FIG. 10A, not only the frame portion 21 but also the arrangement of the carrier 22A is symmetric with respect to the symmetry center line M. Further, as shown in FIG. 10B, the stepped portion 22i is formed in a step shape so that the stepped portion 22i in the upper filter bed plate 20 and the stepped portion 22i in the lower filter bed plate 20 can be engaged with each other. Configure. When the stepped portions 22i are engaged with each other, the filter bed plates 20 are positioned with respect to each other, and rattling or the like between the filter bed plates 20 hardly occurs. That is, the step portion 22i corresponds to the “engagement portion” according to the present invention.

  In addition, in order for the level difference part 22i and the corresponding level difference part 22i among the inverted filter floor plates 20 to engage, the layout of the level difference part 22i must be asymmetrical with respect to the symmetry center line M. That is, as shown in FIG. 10A, in the top view, for example, when the stepped portion 22i is formed by lowering the lower half of the tip member 22a of the carrier 22A lower than the upper half, the symmetry center line M In the carrier 22A at a symmetrical position with respect to the step member 22a, the upper half of the tip member 22a is made lower than the lower half to form the stepped portion 22i. Further, as shown in FIG. 10 (a), it is more preferable to have stepped portions 22i facing in various directions so that the upper and lower filter bed plates 20 and 20 do not move relative to each other when viewed from above. .

  In addition, as an engaging part in this embodiment, it is not restricted to the above-mentioned level difference part 22i. Although not shown in particular, for example, the engaging portion may be provided by providing concavities and convexities that can be engaged with each other at the front end portion of the carrying portion at the symmetrical position. Also in this case, the arrangement of the engaging portions is asymmetrical with respect to the symmetry center line M.

[Third Embodiment]
As shown in FIG. 11, the inner wall (tank main body 1, first partition plate 4, second partition plate 5) of the anaerobic treatment tank B and the outermost carrier 22 </ b> A surrounded by the frame portion 21 are disposed. A gap space g (corresponding to the “space” according to the present invention) is formed between the carrier 22A and the carrier body 22A. If the gap space g is too wide, the fluid to be treated may short-circuit the carrier 22A, and the treatment capacity of the treatment tank may be unexpectedly reduced. Therefore, a configuration in which the gap space g is reduced may be employed.

  For example, as shown in FIGS. 11A and 11B, the outer peripheral portion of the frame portion 21 includes a bending carrier portion 23 that can be bent along the outer peripheral shape of the frame portion 21. Then, a carrier 22 </ b> A is disposed in a region surrounded by the bending carrier 23. Since the shape of the frame portion 21 corresponds to the internal shape of the anaerobic treatment tank B, the filter bed plate 20 can be attached to the anaerobic treatment tank B by bending the bent carrier portion 23. And the support body 22A arrange | positioned at the bending | flexion support part 23 is located in the clearance gap g by assembling | attaching the filter bed board 20 to the anaerobic processing tank B in the state which bent the bending | flexion support part 23. FIG. As a result, the gap in which the fluid to be treated is short-circuited is reduced, and the treatment capacity of the anaerobic treatment tank B can be prevented from being unexpectedly lowered.

  As shown in FIG. 11A, the shape of the carrier 22A disposed on the bending carrier 23 is the same as that of the carrier 22A disposed on the frame 21 other than the bending carrier 23. As shown in FIG. 11B, the shape may be different from the carrier 22 </ b> A disposed in the frame portion 21 other than the bending carrier portion 23 so as to eliminate the gap as much as possible.

[Fourth embodiment]
In the above-described embodiment, an example in which the carrier 22A protrudes only in one direction along the protrusion direction L has been shown. However, as shown in FIG. 12, even if the carrier 22A protrudes on both sides. good. Even in this case, although not particularly illustrated, the frame portion 21 is bilaterally symmetric with respect to the symmetry center line M, and the arrangement of the carrier 22A is asymmetrical with respect to the symmetry centerline M.

  At the time of stock storage or the like, as shown in FIGS. 12A and 12B, the carrier 22A can be completely overlapped to be compact. In addition, when assembling to the anaerobic treatment tank B, as shown in FIGS. 12C and 12D, around the center line N that is parallel to the projection direction L and passes through the center of the filter bed 120 in a top view, The upper and lower filter bed plates 120 are stacked by rotating the filter bed plates 120 by an appropriate angle (for example, 90 degrees or 180 degrees).

[Other alternative embodiments]
(1) In the above-described embodiment, in particular, the shape of the support 22A is tapered and cylindrical so that the plurality of filter bed plates 20 can be compactly stacked at the time of assembly to a processing tank or stock storage. It is not limited to this. Since the object of the present invention can be achieved with the filter bed plate 20 in which the frame portion 21 and the supporting portion 22 are integrally molded, the supporting body 22A does not necessarily have a tapered cylindrical shape. For example, the shape of the carrier 22A may be a simple cylindrical shape or other three-dimensional shape that is not tapered.

  In addition, when the shape of the carrier 22A is a tapered cylindrical shape, the shape is not limited to the tapered cylindrical shape (conical shape) shown in the above-described embodiment, and other tapered cylindrical shapes can be adopted. For example, as shown in FIG. 13A, the shape of the carrier 22A is such that the peripheral diameter changes stepwise as shown in FIG. 13B, even if the side surface is expanded outward. There may be. Further, the shape of the carrier 22A is not particularly illustrated, but may be a polygonal shape such as triangulation, a shape having a wavy surface, or a more complex shape. That is, various shapes can be set for the carrier 22A.

(2) In the above-described embodiment, an example in which the support 22A and the support 22A adjacent to each other are connected by the respective root members 22c and the support 22A is densely arranged has been described. Is not something For example, the base members 22c may be separated from each other, the supporters 22A may be arranged at a distance, and the base members 22c may be connected by different members. Of course, the supporting portions 22A do not have to be arranged densely and regularly, and may be arranged intermittently or irregularly.

  Further, regarding the connection of the carrier 22A to the frame portion 21 and the connection between the carrier portions 22A, a plate material is arranged inside the frame portion 21 and the bottom portion of the carrier 22A is connected to the plate material. It may be a shape as described above.

(3) In the above-described embodiment, an example in which the tapered cylindrical carrier 22A is arranged in a staggered manner on the frame portion 21 is shown, but the present invention is not limited to this. For example, as shown in FIGS. 14 (a) and 14 (b), the filter bed plate 220 is provided with a carrier portion 220 configured by arranging parallel carrier bodies 222A in a row in a top view, and a frame portion 221. It may be a thing. In this case, the carrier 222A in FIGS. 14 (a) and 14 (b) has a planar surface. However, the carrier 222A is not limited to this, and the carrier 222A has a wavy surface shape or a more complicated surface shape. There may be.

(4) In the above-described embodiment, an example in which the bending support portion 23 is provided in order to reduce the gap space g is shown. However, in order to reduce the gap space g, as shown in FIG. A bulging portion 1c in which the inner wall (the tank body 1, the first partition plate 4, the second partition plate 5) is bulged in the tank inner direction may be provided.

  In this embodiment, as is clear from FIG. 15, the bulging portion 1 c also serves as a means for fixing the filter bed plate 20, but is not limited thereto. The means for fixing the filter bed plate 20 and the bulging portion 1c may be configured separately. As means for fixing the filter bed plate 20, for example, a locking portion 1a, a protruding portion 1b (see FIGS. 1 and 2), or an angle member can be applied.

(5) In the above-described embodiment, as an example of fixing the filter bed plate 20 in the anaerobic treatment tank B, the protrusion 1b that bulges in the tank inner direction is shown. However, the shape of the protrusion 1b is as follows. It is not limited to this. For example, the protrusion 1b may have a rib shape extending in the horizontal direction as shown in FIG. 16A or a rib shape extending in the vertical direction as shown in FIG. 16B. Although not shown in particular, the protruding portion 1b may be a member different from the inner wall of the anaerobic treatment tank B (the tank body 1, the first partition plate 4, and the second partition plate 5).

(6) Although not specifically shown, for example, the uppermost filter bed 20 and the lowermost filter bed 20 are not provided without the second and third filter beds 20 and 20 from the bottom in FIG. It is good also as the anaerobic filter bed 2 provided only with. In this case, it is not impeded to fill a large number of carriers separately between the upper and lower filter bed plates 20 and 20.

(7) In the above-described embodiment, the carrier 22A is formed so that the bottom surface 22e is formed along a plane orthogonal to the projection direction L, and the bottom surfaces 22e are aligned on the same "plane". Although it arranged (refer FIG. 4), it is not restricted to this. That is, each bottom surface 22e of the carrier 22A does not need to be a “plane”. For example, although not particularly illustrated, a “surface” having a corrugated shape (corrugated plate shape) when viewed from one side. And various “surfaces” such as a “surface” having a shape in which a predetermined uneven shape is regularly repeated. And you may form the bottom face 22e along those surfaces.

  Furthermore, when the frame portion 21 is shaped along these “surfaces” and the two filter floor plates 20 are back to back, the corrugated plate shape, saw blade shape, unevenness of the bottom surface of each frame portion 21 Preferably, the shapes are configured to engage with each other. With this configuration, the two back-to-back filter bed plates 20 are integrated and difficult to shift, and the rigidity is improved as a whole, even if the fluid pressure acts on the filter bed plate 20 due to the flow of the treated fluid, The filter floor plates 20 are unlikely to rattle each other. Further, the bottom surface of the carrier 22A and the bottom surface of the frame portion 21 are not aligned, and only the frame portion 21 may have a shape along such a surface. Even when the support 22A is arranged so that the bottom surfaces 22e are positioned on the same "plane", although not shown in the drawings, the back surface of the frame portion 21 is provided with irregularities, and two filter bed plates are provided. The same operation and effect can be achieved if the projections and recesses 20 are configured so that the concaves and convexes engage each other.

  The biological carrier according to the present invention can be applied not only to an anaerobic treatment tank but also to an aerobic treatment tank. In addition, the biological carrier according to the present invention is not only a septic tank having the above-described configuration (configuration including a contaminant removal tank, an anaerobic treatment tank, an aerobic treatment tank, a sedimentation tank, a water collection tank, and a disinfection tank), The present invention can also be applied to septic tanks having other configurations (for example, a configuration including two flow rate adjustment tanks and two anaerobic treatment tanks), various deodorization towers, and the like.

1 Tank body (inner wall)
4 First divider (inner wall)
5 Second divider (inner wall)
20 Filter bed (biological carrier)
21 Frame (Mounting part)
21b Outer periphery (outer)
22 carrying part 22A carrying body 22a tip member (tip part)
22f Bottom (engagement part)
22g Vertical corner (engagement part)
22h Side (engagement part)
22i Step part (engagement part)
23 bent carrier 120 filter bed (biological carrier)
220 Filter bed (biological carrier)
221 Frame (mounting part)
222 carrying part 222A carrying body B anaerobic treatment tank (treatment tank)
g Crevice space (space)
L Protrusion direction (predetermined direction)
M symmetry center line

Claims (12)

A biological carrier disposed in a treatment tank that decomposes a target substance in a fluid to be treated by microorganisms,
The microorganism is attached and inhabited, and the supporting part through which the fluid to be treated can circulate,
The fluid to be treated is incapable of flowing, is formed in a frame shape surrounding the carrying portion, and includes an attachment portion attached to the treatment tank while holding the carrying portion,
The attachment portion is formed in a shape corresponding to a cross-sectional shape of the treatment tank to which the biological carrier is attached ,
A biological carrier obtained by integrally molding the carrier and the attachment. The carrier portion includes a plurality of carriers.
Forming the carrier in a tapered cavity shape protruding along a predetermined direction;
The biological carrier according to claim 1, wherein the attachment portion is formed in a frame shape that surrounds all the carriers at a base side position. The carrier has a tapered hollow shape, and includes a tip member, a side peripheral member, a root member, and a plurality of elongated rod-shaped vertical rib members,
  The tip member, the side peripheral member, and the root member are arranged at intervals, and are formed in a mesh shape supported by a plurality of vertical rib members arranged in the circumferential direction,
  The carrying part includes a plurality of the carrying bodies in which the carrying bodies adjacent to each other are connected to each other by the root members,
  The frame portion is connected to the outermost carrier in a plan view among the carriers of the carrier, and is formed in a frame shape surrounding the plurality of carriers at the position of a root member. The biological support according to 1. A biological carrier disposed in a treatment tank that decomposes a target substance in a fluid to be treated by microorganisms,
The microorganism is attached and inhabited, and the supporting part through which the fluid to be treated can circulate,
An attachment part to be attached to the treatment tank while holding the carrier part,
The carrier part and the attachment part are integrally molded,
The carrier portion includes a plurality of carriers.
Forming the carrier in a tapered cavity shape protruding along a predetermined direction;
The mounting portion is formed in a frame shape that surrounds all the carriers at the base side position ,
The mounting portion has a symmetrical shape when viewed along the predetermined direction,
The carrier, as viewed along the predetermined direction, is arranged asymmetrically across the center line of symmetry of the mounting portion,
When the biological carrier is inverted around the symmetry center line and brought close to the other biological carrier along the predetermined direction while aligning the outer position of each of the attachment parts, the therebetween of the support, the other of the insertable der Ru raw material carrying member at least a portion of said carrier in an organism carrying member in the organism carrier. When an outer peripheral portion of the carrier is provided with an engaging portion, and at least a part of the carrier in the other biological carrier is inserted between the carriers in one biological carrier, The biological carrier according to claim 4 , wherein the engaging portion of the carrier in the biological carrier and the engaging portion of the carrier in the other biological carrier can be engaged. The mounting portion has a symmetrical shape when viewed along the predetermined direction,
The carrier is arranged symmetrically across the symmetry center line of the mounting portion as viewed along the predetermined direction.
When the biological carrier is inverted around the symmetry center line and brought close to the other biological carrier along the predetermined direction while aligning the outer position of each of the attachment parts, The tip of the carrier in the biological carrier and the tip of the carrier in the other biological carrier are face-to-face,
An engaging portion is provided at the tip of the carrier projecting in the same direction, and the engaging portion is disposed asymmetrically across the symmetry center line,
When the tip of the carrier in one of the biological carriers and the tip of the carrier in the other biological carrier are brought to face each other, the engagement of the carrier in one of the biological carriers The biological carrier according to claim 2, wherein the joint portion and the engaging portion of the carrier in the other biological carrier can be engaged . The biological carrier according to any one of claims 1 to 6, wherein the carrier projects in the same direction along the predetermined direction. A biological carrier disposed in a treatment tank that decomposes a target substance in a fluid to be treated by microorganisms,
The microorganism is attached and inhabited, and the supporting part through which the fluid to be treated can circulate,
An attachment part to be attached to the treatment tank while holding the carrier part,
The carrying part and the mounting part are integrally molded,
The carrier portion includes a plurality of carriers.
Forming the carrier in a tapered cavity shape protruding along a predetermined direction;
The mounting portion is formed in a frame shape that surrounds all the carriers at the base side position ,
The attachment portion is formed in a shape corresponding to the internal shape of the portion of the treatment tank to which the attachment portion is attached,
The outer peripheral portion of the mounting portion is provided with a bent carrier portion that can be bent along the outer peripheral shape of the mounting portion, and the carrier is disposed on the bent carrier portion,
When the biological carrier is attached to the treatment tank in a state where the bending carrier is bent, the carrier disposed in the bending carrier is the most of the carriers surrounded by the attachment. It said bearing member disposed outside the raw product carrier you located in the space between the inner wall of the processing tank. A septic tank in which the biological carrier according to claim 1 is disposed,
  A treatment tank in which the fluid to be treated flows vertically;
  Arranging the biological carrier so as to divide the treatment tank into upper and lower regions,
  A septic tank in which a fluid to be treated in the treatment tank flows through the carrying part of the biological carrier. The carrying part of the biological carrier comprises a plurality of carriers.
  The septic tank according to claim 9, wherein the carrier is formed in a tapered hollow shape projecting in the same direction along a predetermined direction, and at least two biological carriers are arranged back to back. The bulging part which bulges the inner wall in the tank inner side is provided in order to make the crevice space between the inner wall of the processing tank and the carrying part of the living organism carrier small. The septic tank according to 9 or 10. The septic tank according to claim 11, wherein the bulging portion also serves as means for fixing the biological carrier.

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