KR102592116B1 - Apparatus for culturing microorganism for wastewater treatment and method for culturing microorganism for wastewater treatment using the same - Google Patents

Abstract

The present invention relates to an apparatus for culturing microorganisms, which comprises: a culture tank containing a culture medium to culture microorganisms that decompose organic matter contained in the culture medium; an air diffuser accommodated in the culture tank to receive external air and supply microbubbles of the air to the culture tank through a plurality of holes; a fluid circulation unit having a fluid inflow pipe that is a pipe disposed outside the side of the culture tank and branched from the lower side to communicate with the culture tank and enable a fluid to flow in from the culture tank and a fluid output pipe branched from the upper side to communicate with the culture tank and enable the fluid to flow out into the culture tank; and a non-powered stirrer installed at a predetermined interval above the air diffuser in the culture tank and rotated by the momentum of the culture medium flowing out of a culture medium outflow pipe. Accordingly, a culturing speed in the culture tank is fast and a culture cycle is shortened to increase microbial culture efficiency.

Description

Microorganism culturing device for wastewater treatment and method for cultivating microorganisms for wastewater treatment using the same {Apparatus for culturing microorganism for wastewater treatment and method for culturing microorganism for wastewater treatment using the same}

The present invention relates to a microbial culture device for wastewater treatment and a method for treating wastewater using the same. More specifically, it relates to a microbial culture device for wastewater treatment using the aeration liquid of an aeration tank of a wastewater treatment plant and a method for cultivating microorganisms for wastewater treatment using the same. will be.

Typically, wastewater treatment methods include physicochemical methods and biological methods. Among these, physical and chemical methods have high processing costs and the inconvenience of having to go through a separate process to treat the product after treatment. On the other hand, biological methods remove organic substances in wastewater by decomposing organic substances into carbon dioxide and generating methane gas, so the amount of products after treatment is relatively small. Biological treatment methods mainly use microorganisms to decompose, detoxify, and separate pollutants in wastewater, and are mainly used for secondary treatment of domestic sewage, factory wastewater containing organic matter, and sludge generated therefrom. This biological wastewater treatment method is widely used because it has the advantages of low treatment cost and various processes.

Microorganisms used in biological treatment of wastewater are mainly grown in culture tanks and are mixed cultures containing bacteria, fungi, protozoa, and metazoans, which proliferate using dissolved oxygen dissolved in wastewater, converting organic pollutants into nutrients. It can be used to purify wastewater by decomposing organic pollutants. A microbial culture tank is an environment similar to natural conditions in which microorganisms can be cultivated and propagated with high efficiency, that is, the microorganisms are cultivated and proliferated by supplying culture strains, organic and inorganic media, and air inside. Therefore, it is necessary to develop a culture device in which the environmental treatment conditions of the culture tank are optimized to improve the culture efficiency of microorganisms for wastewater treatment.

International Patent Publication WO 96/15992

The purpose of the present invention is to not only smooth the supply of air and supply fine air uniformly without causing dead zones, but also to generate large air bubbles due to vortices generated when fluid collides with the bottom surface during fluid circulation, thereby damaging the fluid in the culture tank. A microbial culture device for wastewater treatment that solves the problem of low dissolved oxygen due to reduced contact time, thereby increasing the culture speed of aerobic microorganisms, shortening the culture cycle, increasing culture efficiency, and minimizing power consumption. The aim is to provide a method for cultivating microorganisms for wastewater treatment using this method.

According to one aspect of the present invention,

A culture tank in which the culture medium is accommodated and microorganisms that decompose organic matter contained in the culture medium are cultivated; an air diffuser accommodated in the culture tank, receiving external air and supplying fine air bubbles to the culture tank through a plurality of holes; A pipe disposed outside the side of the culture tank, forming a fluid inlet pipe that communicates with the lower side of the culture tank and allows fluid to flow from the culture tank, and a fluid outflow pipe that communicates with the upper side of the culture tank and allows fluid to flow out of the culture tank. fluid circulation unit; and a non-powered agitator installed on the diffuser portion in the culture tank at predetermined intervals, rotated by the momentum of the culture fluid flowing out of the culture fluid outflow pipe, and causing the fluid to flow toward the diffuser portion. A microbial culture device for wastewater treatment comprising a. is provided.

The diffuser unit includes a diffuser tube which is a pipe arranged in a circular shape at a predetermined distance from the inner surface and bottom surface of the culture tank, and the diffuser tube is arranged in a plurality in equilibrium with each other at a predetermined interval, and includes a plurality of the diffuser tubes. They can be connected to each other through diffuser connectors and communicate with each other.

The plurality of diffusers include an upper diffuser, a middle diffuser, and a lower diffuser from the top, and the circular diameter of the diffuser arranged in a circle may be decreased in the order of upper diffuser > middle diffuser > lower diffuser. there is.

The distance between the inner surface of the culture tank based on the upper diffuser may be 80 to 160 mm, and the distance between the bottom surface of the culture tank and the lower diffuser may be 200 to 500 mm.

The upper diffuser may communicate with the upper air inlet, and the lower diffuser may communicate with the lower air inlet.

The plurality of holes include: a first hole located on the lower side of the upper diffuser to discharge fine bubbles downward; a second hole located on the lower side of the intermediate diffuser to discharge fine bubbles downward; and a third hole located on the lower side of the lower diffuser for discharging fine bubbles downward.

The diameter of the hole gradually increases from the inner wall to the outer wall of the diffuser, so that an inclined surface may be formed at the edge of the hole.

The inclined surface may have an angle (θ) of 20 to 40° with the hole central axis.

The distance between the upper diffuser and the lower diffuser may be 250 to 400 mm.

It may further include a microbubble plate located inside or outside the air diffuser and including a mesh network to generate microbubbles of air.

The microbubble plate 140 may have a mesh of 28 to 36.

The diffuser is located longitudinally in the center at a predetermined distance from the bottom surface of the culture tank, includes an air tank pipe that is a pipe through which external air flows, branches off from the air tank pipe, and is connected to an inner surface of the culture tank and It is disposed at predetermined intervals, communicates with the air tank pipe, and includes a tapered diffuser rod, which is a rod-shaped diffuser pipe with a plurality of holes, and the air tank pipe is in communication with an air inlet pipe through which external air flows. You can.

The tapered diffuser includes an upper tapered diffuser and a lower tapered diffuser respectively branched from the top and bottom of the air tank pipe, and the upper tapered diffuser includes a fourth diffuser located at the lower side to discharge fine bubbles to the bottom. A plurality of holes may be formed, and a plurality of fifth holes may be formed in the lower tapered diffuser rod to discharge microbubbles downward.

The fluid circulation unit may be equipped with a pump that provides power to elevate the fluid flowing into the fluid inlet pipe to the fluid outlet pipe.

According to another aspect of the present invention,

A method of cultivating microorganisms for wastewater treatment using the above-described microorganism culture device for wastewater treatment is provided.

The microbial culture device for wastewater treatment of the present invention smoothens the supply of air, supplies fine air bubbles uniformly by minimizing dead zones, and minimizes vortices generated when the fluid collides with the bottom surface during fluid circulation, thereby increasing the flow rate within the culture tank. By increasing the amount of dissolved oxygen by increasing the contact time between microbubbles and fluid, the culture speed of aerobic microorganisms can be increased, the culture cycle can be shortened, and culture efficiency can be increased. In addition, power usage can be reduced as it includes a diffuser structure that optimizes fluid agitation and oxygen supply conditions in the culture tank and a non-powered stirrer that does not use power.

1 is a partial side view of a microbial culture device for wastewater treatment according to a first embodiment of the present invention.
Figure 2 is a top plan view of a microbial culture device for wastewater treatment according to a first embodiment of the present invention.
Figure 3 is a partial side cross-sectional view of the diffuser 120 included in the microbial culture device for wastewater treatment according to the first embodiment of the present invention.
Figure 4 is a plan view of the non-powered stirrer 300 included in the microbial culture device for wastewater treatment according to an embodiment of the present invention.
Figure 5 is a side schematic diagram showing only the additional configuration of the microbial culture device for wastewater treatment according to the first embodiment of the present invention.
Figure 6 is a partial side view of a microbial culture device for wastewater treatment according to a second embodiment of the present invention.
Figure 7 is a top plan view of a microbial culture device for wastewater treatment according to a second embodiment of the present invention.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all transformations, equivalents, and substitutes included in the spirit and technical scope of the present invention. In describing the present invention, if it is determined that a detailed description of related known technologies may obscure the gist of the present invention, the detailed description will be omitted.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, identical or corresponding components will be assigned the same drawing numbers and overlapping descriptions thereof will be omitted. do.

Figure 1 is a partial side view of a microbial culture device for wastewater treatment according to a first embodiment of the present invention, and Figure 2 is a top plan view of a microbial culture device for wastewater treatment according to a first embodiment of the present invention. In addition, Figure 3 is a partial side and cross-sectional view (A-A section) of the diffuser 120 included in the microbial culture device for wastewater treatment according to the first embodiment of the present invention, and Figure 4 is an embodiment of the present invention. It is a plan view of the non-powered agitator 300 included in the microbial culture device for wastewater treatment according to the present invention, and Figure 5 is a side schematic diagram showing only the additional configuration of the microbial culture device for wastewater treatment according to the first embodiment of the present invention.

Hereinafter, a microbial culturing device for wastewater treatment according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 5.

The microbial culturing device for wastewater treatment of the present invention can cultivate microorganisms by directly using the aeration liquid from the aeration tank of the wastewater treatment plant as a culture medium.

The microorganism culture device for wastewater treatment according to the first embodiment of the present invention includes a culture tank 10, a first diffuser 100a, a fluid circulation unit 200, and a non-powered stirrer 300.

The culture tank 10 is characterized in that it is a culture tank in which a culture solution introduced from the outside is received and microorganisms that decompose organic matter contained in the culture solution are cultured.

The first diffuser 100a has a trapezoidal rotating body shape and is accommodated in the culture tank 10, and has a structure that receives external air and supplies fine bubbles of air to the culture tank 10 through a plurality of holes 130. It is characterized by

The fluid circulation unit 200 is a pipe disposed outside the side of the culture tank 10, and is in communication with the lower side of the culture tank 10, and includes a fluid inlet pipe 210 through which fluid flows from the culture tank 10, And a fluid outflow pipe 220 is formed that communicates with the upper side of the culture tank and allows fluid to flow out into the culture tank 10.

The non-powered stirrer 300 is installed at predetermined intervals on the first diffuser 100a in the culture tank 10 and is rotated by the momentum of the culture solution flowing out of the culture solution outflow pipe 220.

The culture tank 10 is additionally equipped with a cover 12 at the top, and the cover 12 has a culture solution supply part 14 through which the culture solution flows, and a culture solution supply pump that supplies the aeration solution of the wastewater treatment plant aeration tank to the culture solution supply part 14. (15), a strain input portion 16 into which cultured microorganisms and/or medium is input may be formed.

It is preferable that an insulating part 11 is additionally installed on the outside or inside the surface of the culture tank 10, and more preferably, an insulating material can be adhered to surround the outside of the surface of the culture tank 10. Accordingly, the temperature of the culture medium inside the culture tank 10 can be maintained at a temperature suitable for culturing microorganisms of 20 to 30°C.

A water level sensor 19 that detects the water level in the culture tank may be additionally installed in the culture tank 10.

The water level sensor 19 may be a contact or non-contact sensor. The contact type water level sensor may be a guide rope type (shown in FIG. 5 of the present invention), float type, capacitance type, pressure type, differential pressure type, etc., and the non-contact type sensor may be a radio wave type or ultrasonic type sensor.

Additionally, a discharge portion 18 may be formed at the bottom of the culture tank 10 through which the culture solution in which the microbial culture is completed is discharged.

Meanwhile, the first diffuser 100a will be looked at in detail below.

The diffuser 100 includes a diffuser 120, which is a pipe arranged in a circular shape at a predetermined distance from the inner and bottom surfaces of the culture tank 10.

A plurality of diffusers 120 are arranged in equilibrium with each other at predetermined intervals, and the plurality of diffusers 120 may be connected to each other through a diffuser connector 128 to communicate with each other.

The plurality of diffusers 120 includes an upper diffuser 122, a middle diffuser 124, and a lower diffuser 126 from the top, and the circular diameter of the diffuser pipes arranged in a circle is the upper diffuser. (122) > middle diffuser (124) > lower diffuser (126) is preferably decreased in this order.

The distance (W ₁ ) from the inner surface of the culture tank 10 based on the upper diffuser 122 is preferably 80 to 160 mm, more preferably 100 to 140 mm, and even more preferably 110 to 130 mm. It can be mm. When the distance (W ₁ ) from the inner surface is maintained in the above range, the circulation of fluid in the culture tank 10 can be achieved without causing eddy currents, and as a result, the contact time between the microbubbles and the fluid increases, increasing the amount of dissolved oxygen. It can be increased appropriately.

Meanwhile, the distance (h ₁ ) from the bottom of the culture tank 10 based on the lower diffuser 126 is preferably 200 to 500 mm, more preferably 150 to 450 mm, and even more preferably 200 mm. It may be from 300 mm. By maintaining the distance (h ₁ ) from the bottom surface in this way, the fluid can be circulated while minimizing the eddy currents generated when the fluid flow collides with the bottom surface. As a result, the generation of large air bubbles due to vortex generation can be minimized, thereby increasing contact time with the fluid and maximizing the amount of dissolved oxygen. At this time, if the distance (h ₁ ) between the diffuser 120 and the bottom is less than 200 mm, the amount of vortex generation may increase and the amount of dissolved oxygen may decrease, and if it is more than 500 mm, the fluid may reach the bottom of the culture tank 10. Microbial culture efficiency may decrease due to poor circulation.

At least one of the plurality of diffusers 120 may be in communication with the air inlets 110 and 112, which are passages for introducing external air or oxygen, and preferably the upper diffuser 122 is the upper air inlet. It communicates with the unit 110, and the lower diffuser 126 may communicate with the lower air inlet 112. In this way, external air or oxygen is introduced simultaneously from the upper and lower parts of the diffuser 120, so that air or oxygen can be uniformly supplied to the entire diffuser 120 in a sufficiently large amount.

The air inlets 110 and 120 may be connected to an air pump (not shown) that supplies external air.

The pipe diameter of the diffuser 120 is preferably 15 to 25 mm, and more preferably 18 to 23 mm. If the pipe diameter is smaller than 15 mm, the discharge of microbubbles may decrease, which may reduce the oxygen supply in the culture medium. If the pipe diameter exceeds 25 mm, the speed of fluid movement within the pipe will slow down, reducing the formation of microbubbles, which may reduce the dissolved oxygen in the culture medium. Oxygen levels may decrease.

The circular arrangement of the upper diffuser 122 preferably has a diameter of 400 to 500 mm, and more preferably 450 to 480 mm. In addition, the circular arrangement of the lower diffuser 126 preferably has a diameter of 100 to 200 mm, and more preferably 120 to 160 mm. In this way, because it forms a trapezoidal rotating body whose diameter becomes smaller toward the bottom, microbubbles are sufficiently supplied to the central area where the diffuser 122 is placed, so that the culture cycle of aerobic microorganisms is shortened and they can be cultured in sufficient quantities. In addition, the fluid that descends toward the center of the diffuser 120 by the non-powered stirrer 300 moves toward the lower diffuser 126 and then rises outward, and at this time, the circular arrangement diameter of the lower diffuser 126 is relatively small. Therefore, the fluid can rise more easily and the fluid can circulate more easily. However, when the upper diffuser 122, the middle diffuser 124, and the lower diffuser 126 are arranged in the same form, the passage through which the rising fluid passes is narrowed and only the vertical passage remains, making smooth fluid circulation difficult. .

A plurality of holes 130 for discharging external air into the culture tank 10 may be formed in any one of the plurality of diffusers 120, preferably the upper diffuser 122 and the middle diffuser. Each of the holes 124 and the lower diffuser 126 may be formed with a plurality of holes 130 .

More preferably, the hole 130 includes a first hole 132 located on the lower side of the upper diffuser 122 to discharge fine bubbles downward; A second hole 134 located on the lower side of the intermediate diffuser 124 to discharge fine bubbles downward; and a third hole 136 located on the lower side of the lower diffuser 126 to discharge fine bubbles downward. In this way, the hole 130 is installed in the lower direction of the diffuser 120, that is, in the same direction as the downward direction of the fluid, thereby minimizing the vortex of the fluid and preventing the formation of large air bubbles, thereby maximizing the amount of dissolved oxygen.

The distance between the upper diffuser 122 and the lower diffuser 126 is preferably 250 to 400 mm, and more preferably 300 to 350 mm. If the gap is within the above range, microbubbles may be uniformly supplied to the area between the air diffusers 120. If the gap exceeds the above range, a dead zone of microbubble supply may occur, and if the gap is less than the above range, a dead zone of microbubble supply may occur. Cultivation efficiency may decrease.

Meanwhile, referring to FIG. 7 , the diameter of the hole 130 gradually increases from the inner wall to the outer wall of the diffuser 120, so that an inclined surface is preferably formed at the edge of the hole.

The angle θ of the inclined surface with the central axis of the hole 130 is preferably 20 to 40°, and more preferably 25 to 35°. If the angle (θ) is less than 20°, the range of the dead zone where fine bubbles are not supplied around the hole 130 may be expanded, and if it exceeds 40°, the supply speed of fine bubbles may be lowered. You can.

The diameter of the hole 130 is preferably 2 to 7 mm, more preferably 3 to 5 mm, based on the wide diameter. If the hole 130 diameter is formed less than the lower limit, the supply amount of microbubbles may be insufficient, and if the hole 130 diameter exceeds the upper limit, the outflow speed of the microbubbles may decrease and a dead zone may occur.

Meanwhile, it is preferable to further include a microbubble plate 140 located inside or outside the diffuser 120 and including a mesh net to generate fine bubbles of air, and more preferably inside the diffuser 120. It can be located in .

The microbubble plate 140 is preferably formed with a 28 to 36 mesh, more preferably with a 30 to 34 mesh, and even more preferably with a 31 to 33 mesh. If meshes larger than 28 mesh are formed, the size of the air bubbles increases, shortening the contact time with the fluid, which may reduce oxygen supply, and if meshes smaller than 36 mesh are formed, the production rate of microbubbles may decrease.

The mesh unit is in accordance with the standards listed in Table 1 below.

[Table 1]

Meanwhile, the fluid circulation unit 200 may be equipped with a pump (not shown) that provides power to raise the fluid flowing into the fluid inlet pipe 210 to the fluid outlet pipe 220.

The non-powered stirrer 300 may include a body 310 and a stirring blade 320. The body 310 is fixed at a predetermined position within the culture tank 10, and the stirring wing 320 is a wing branched from the side of the body 310.

The stirring wings 320 form a uniform angle and may be formed in 2 to 4 pieces, preferably in 3 pieces. The stirring blade 320 rotates by the momentum of the fluid flowing out of the fluid outlet pipe 220 of the fluid circulation unit 200 without a separate power supply, and the rotation causes the upper fluid to descend into the diffuser 100. can do.

The non-powered stirrer 300 preferably has a side width of the stirring blade 320 of 150 to 170 mm, more preferably 155 to 168 mm, and even more preferably 160 to 164 mm. If the width is less than the lower limit, the circulation range of the fluid in the culture tank becomes narrow, making it difficult for smooth circulation to occur, and if it exceeds the upper limit, the rotation speed of the stirring blade 320 may slow down, making fluid circulation difficult.

Meanwhile, a temperature control unit 400 that controls the culture temperature may be additionally installed in the culture tank 10.

The temperature control unit 400 may include a fruit tank 410, a heat conduction pipe 420, and a heat transfer unit 430.

The fruit tank 410 stores fruit or refrigerant if necessary, includes a heater (not shown) that heats the fruit, and may be installed separately outside the reactor 10.

The heat conduction pipe 420 may be a pipe that transfers heat from the fruit tank 410 to the culture tank 10.

The heat transfer unit 430 is connected to the heat conduction pipe 420 and may be installed inside the culture tank to transfer heat to the fluid within the culture tank 10. Preferably, the heat transfer unit 430 is a solenoid-shaped pipe installed on the inner surface of the culture tank 10. As the heated fruit flows inside, the heat of the fruit can be transferred to the fluid in the culture tank 10 through the pipe. .

Meanwhile, a washing nozzle 500 may be additionally installed in the culture tank 10 or the cover 12 to spray washing water inside the culture tank after completion of cultivation.

A high-temperature sterilizer 510 may be additionally installed inside the culture tank 10 to sterilize the inside of the culture tank after completion of cultivation.

The high-temperature sterilizer 510 is preferably located below the culture tank 10, and may be formed as a pipe through which fruit flows.

The microbial culture device for wastewater purification of the present invention is additionally equipped with a controller (not shown) so that the operation of the device can be manually or automatically controlled.

Figure 6 is a partial side view of a microorganism culture device for wastewater treatment according to a second embodiment of the present invention, and Figure 7 is a top plan view of the microorganism culture device for wastewater treatment according to a second embodiment of the present invention.

Hereinafter, a microorganism culture device for wastewater treatment according to a second embodiment of the present invention will be described with reference to FIGS. 6 and 7.

The microbial culture device for wastewater treatment according to the second embodiment of the present invention may have the same configuration except that it includes a second diffuser (100b) instead of the first diffuser (100a) of the first embodiment. You can.

The second diffuser 100b is characterized in that it includes an air tank pipe 150 and tapered diffuser rods 152 and 154.

The second diffuser 100b is located longitudinally in the center of the culture tank 10 at a predetermined distance from the bottom surface, and may be a pipe through which external air flows.

The tapered diffuser rods (152, 154) are branched from the air tank pipe (150), are arranged at a predetermined distance from the inner surface of the culture tank, are in communication with the air tank pipe (150), and have a rod shape with a plurality of holes. It is characterized by being a diffuser.

The air tank pipe 150 may be in communication with the air inlet pipes 110 and 112 through which external air flows.

The tapered diffuser preferably includes an upper tapered diffuser 152 located at the upper end of the air tank pipe 150 and a lower tapered diffuser 154 located at the lower end of the air tank pipe 150.

The distance (W ₂ ) from the inner surface of the culture tank 10 based on the upper tapered diffuser rod 152 is preferably 80 to 160 mm, more preferably 100 to 140 mm, and even more preferably 110 to 110 mm. It may be 130 mm. When the distance (W ₂ ) from the inner surface is maintained in the above range, the circulation of fluid in the culture tank 10 can be achieved without causing eddy currents, and as a result, the contact time between the microbubbles and the fluid increases, increasing the amount of dissolved oxygen. It can be increased appropriately.

Meanwhile, the distance (h ₂ ) from the bottom of the culture tank 10 based on the lower tapered diffuser rod 154 is preferably 200 to 500 mm, more preferably 150 to 450 mm, and even more preferably It may be 200 to 300 mm. By maintaining the distance (h ₂ ) from the bottom surface in this way, the fluid can be circulated while minimizing the eddy currents generated when the fluid flow collides with the bottom surface. As a result, the generation of large air bubbles due to vortex generation can be minimized, thereby increasing contact time with the fluid and maximizing the amount of dissolved oxygen. At this time, if the distance (h ₂ ) between the lower tapered diffuser rod 154 and the bottom is less than 200 mm, the amount of vortex generation may increase and the amount of dissolved oxygen may decrease, and if it is more than 500 mm, the bottom surface of the culture tank 10 Since fluid circulation is not smooth, microbial culture efficiency may be reduced.

It is preferable that the upper tapered diffuser rod 152 and the lower tapered diffuser rod 154 are three rod-shaped pipes branching at a uniform angle.

Each of the plurality of tapered diffuser rods 152 and 154 may have a plurality of holes formed therein.

Preferably, a plurality of fourth holes 162 may be formed in the upper tapered diffuser 152 and positioned on the lower side to discharge microbubbles downward, and located on the lower side of the lower tapered diffuser 154. Thus, a plurality of fifth holes 164 that discharge microbubbles downward may be formed.

The diameter of the air tank pipe 150 is preferably 3 to 10 mm, and more preferably 5 to 7 mm. If the diameter is less than the lower limit, the amount of air supplied to the air tank pipe 150 of the second diffuser 100b is low, and the density of air smoothly supplied to the tapered diffuser rods 152 and 154 is lowered, resulting in the formation of fine bubbles. The discharge amount may be lowered, and if the diameter exceeds the upper limit, the flow rate of air moving in the pipe may become slow, making it difficult to quickly supply air to the tapered diffuser rods 152 and 154.

The distance between the upper tapered diffuser 152 and the lower tapered diffuser 154 may be 250 to 400 mm, and more preferably 300 to 350 mm. If the gap is within the above range, fine bubbles can be uniformly supplied to the area between the upper tapered diffuser 152 and the lower tapered diffuser 154, and if the gap exceeds the above range, fine bubbles are not supplied. Dead zones may occur, and if the interval is less than the above, culture efficiency may decrease.

In addition, the present invention provides a method of cultivating microorganisms for treating wastewater using the above-described microorganism culturing device for treating wastewater.

Although the embodiments of the present invention have been described above, those skilled in the art can add, change, delete or add components without departing from the spirit of the present invention as set forth in the patent claims. The present invention may be modified and changed in various ways, and this will also be included within the scope of rights of the present invention.

Culture tank (10)
Insulation section (11)
Cover(12)
Culture medium supply unit (14)
Culture medium supply pump (15)
Strain input unit (16)
Discharge section (18)
Water level sensor(19)
First base (100a)
Upper air inlet (110)
Lower air inlet (112)
Diffuser (120)
Upper diffuser (122)
Intermediate diffuser (124)
Lower diffuser (126)
Diffuser connector (128)
Hall(130)
Hole 1 (132)
2nd hole (134)
3rd hole (136)
Microbubble plate (140)
Second perinatal area (100b)
Air tank pipe (150)
Upper tapered diffuser (152)
Lower tapered diffuser (154)
Hole 4 (162)
Hole 5 (164)
Fluid circulation unit (200)
Fluid Inlet Pipe (210)
Fluid Outlet Pipe (220)
Non-powered stirrer (300)
Body (310)
Stirring wing (320)
Temperature control unit (400)
Fruit Tank(410)
Heat conduction tube (420)
Heat transfer unit (430)
Washing nozzle (500)
High temperature sterilizer (510)

Claims (15)

A culture tank in which the culture medium is accommodated and microorganisms that decompose organic matter contained in the culture medium are cultivated;
an air diffuser accommodated in the culture tank, receiving external air and supplying fine air bubbles to the culture tank through a plurality of holes;
A pipe disposed outside the side of the culture tank, branched from the lower side and communicating with the culture tank, and a fluid inlet pipe through which fluid flows from the culture tank, and a fluid branching from the upper side and communicating with the culture tank, through which fluid flows out into the culture tank. a fluid circulation section in which an outflow pipe is formed; and
It includes a non-powered stirrer installed at a predetermined interval above the acid base in the culture tank and rotated by the momentum of the culture solution flowing out of the fluid outflow pipe,
The diffuser includes a diffuser that is a pipe arranged in a circular shape at a predetermined distance from the inner surface of the culture tank, and the diffuser is arranged in a plurality in equilibrium with each other at a predetermined interval, and the plurality of diffusers are diffuser pipes. They are interconnected by connectors and communicate with each other,
The plurality of diffusers include an upper diffuser, a middle diffuser, and a lower diffuser from the top, and the circular diameters of the diffusers arranged in a circle become smaller in the order of upper diffuser > middle diffuser > lower diffuser,
The plurality of holes include: a first hole located on the lower side of the upper diffuser to discharge fine bubbles downward; a second hole located on the lower side of the intermediate diffuser to discharge fine bubbles downward; and a third hole located on the lower side of the lower diffuser for discharging fine bubbles downward. delete delete According to paragraph 1,
The upper air diffuser is in communication with the upper air inlet, and the lower air diffuser is in communication with the lower air inlet. delete According to paragraph 1,
The hole is a microorganism culture device for wastewater treatment, characterized in that the diameter of the hole gradually increases from the inner wall to the outer wall of the diffuser, and an inclined surface is formed at the edge of the hole. According to clause 6,
A microbial culture device for wastewater treatment, characterized in that the angle (θ) of the inclined surface with the central axis of the hole is 20 to 40°. According to paragraph 1,
A microbial culture device for wastewater treatment, characterized in that the distance between the upper diffuser and the lower diffuser is 250 to 400 mm. According to paragraph 1,
A microbubble culture device for wastewater treatment, characterized in that it is located inside or outside the diffuser and further includes a microbubble plate that includes a mesh network and generates microbubbles in the air. According to clause 9,
The microbubble plate 140 is a microbial culture device for wastewater treatment, characterized in that 28 to 36 mesh is formed. delete delete delete According to paragraph 1,
A microbial culture device for wastewater treatment, wherein the fluid circulation unit is equipped with a pump that provides power to raise the fluid flowing into the fluid inlet pipe to the fluid outlet pipe. A method of cultivating microorganisms for wastewater treatment using the microbial culture device for wastewater treatment according to any one of claims 1, 4, 6 to 10, and 14.