JP2003071479A - Microbiological reactor and method for treating liquid containing nutrition source of microorganism using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low cost microbiological reactor which can improve wastewater treatment efficiency and production efficiency of useful substance produced by microorganisms, has a simple structure, is made and maintained easily, and is free from possibilities of component damage and noise generation. SOLUTION: This microbiological reactor 1 is provided with a first reaction tank 2 and a second reaction tank 3 for treating a liquid containing nutrition sources of microorganisms, such as wastewater, by Bacillus bacteria, etc., a communication means (an opening) 4 communicating the spaces in the first reaction tank 2 and the second reaction tank 3 to each other, microorganism carrier bodies 5, 15 that can carry the microorganisms, oxygen supply means (aeration devices) 8, 18 for releasing oxygen-containing gas (air) into the tanks, and exhaust regulating valves 7, 16 for exhausting the oxygen-containing gas. Operation of the exhaust regulating valves 7, 16, etc., makes the liquid containing the nutrition sources of the microorganisms move alternately between the first reaction tank 2 and the second reaction tank 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microbial reaction apparatus capable of treating wastewater containing organic substances or the like, or producing useful substances such as compost and pharmaceuticals using microorganisms.

[0002]

2. Description of the Related Art Conventionally, in order to grow aerobic microorganisms,
Aeration is performed on the nutrient solution in which the microorganisms are suspended in the reaction tank, or on the microbial carrier fixed in the nutrient solution in the reaction tank. However, in any of the methods, since oxygen is supplied to the nutrient solution containing the microorganisms, the supply of oxygen to the microorganisms is insufficient and the growth rate of the microorganisms cannot be significantly increased. In particular, when a microbial carrier is used, the microorganisms attached to the microbial carrier form a film body that is an aggregate of microorganisms on the surface of the microbial carrier, and the thickness of the film body exceeds 0.3 mm. Then, since it is immersed in the liquid, there is a drawback that oxygen is not sufficiently distributed to the inside of the film body and an anaerobic state part is generated.

On the other hand, in the technical field of purifying wastewater from factories, households, etc., in particular, as a method for removing nitrogen and phosphorus, Ina Chuo Sanitation has replaced the conventional activated sludge methods such as A2 / O method and SBR method The processing method using bacteria of the genus Bacillus developed by Hiroki Murakami and Mitsuru Aoki of the center is attracting worldwide attention. This method utilizes bacteria of the genus Bacillus, which is an aerobic gram-positive bacillus, to remove nitrogen and phosphorus in wastewater and purify the wastewater to have a low BOD value. It has also been attempted to cultivate Bacillus bacteria by this method to produce microbial-derived substances that can be used as compost and soil conditioners.

As a means for efficiently carrying out this method, an aeration apparatus including a rotary reticulated disk made of vinylidene chloride fiber has been proposed. This aeration device uses a reticulated disk supporting microorganisms. The reticulated disk is erected vertically with its lower half part immersed in waste water and its upper half part exposed to the air. When the reticulated disc is rotated at a predetermined rotation speed, the microorganisms carried on the reticulated disc are immersed in waste water to supply a nutrient source and exposed to the air to supply oxygen. The cells are alternately placed on the ground and the growth rate is remarkably increased.

[0005]

When the aerator using the rotating reticulated disc is used, a lump of microbial cells adheres around the rotation axis of the reticulated disc as the microorganism grows. The load on the rotary shaft increases, and the risk of damage to the rotary shaft increases. In fact, the rotating disk system is
In the past, there was a history of losing the user's trust due to the world-famous accident of broken shaft, and in recent years, the accident of broken shaft has been reported by the latest surface aeration device. Further, in the rotating disk, the microorganisms hardly adhere to the central portion, but adhere unevenly to the outer peripheral portion, and because the proliferation is uneven, the efficiency of microorganism proliferation is poor,
Having a complicated structure to hold a predetermined shape, high cost, in order to prevent damage to the reticulated disc due to the fall of the lumps of dead and blackened microorganisms on the reticulated disc,
The material of the mesh disc is required to have a certain strength or more, the type of material is limited to a narrow range, the number of parts such as spacers is large, and maintenance is complicated. There are drawbacks such as noise and running cost increase.

Therefore, the object of the present invention is to significantly increase the growth rate of microorganisms as compared with the case where aeration is simply carried out in a microbial nutrient source-containing liquid containing microorganisms, the efficiency of wastewater treatment and useful substances by microorganisms. It is possible to improve the production efficiency of the microbe, and there is no risk of accidents such as breakage of parts during operation, has a simple structure, is easy to manufacture and maintain, and is a low-cost microorganism. It is to provide a reactor.

[0007]

Means for Solving the Problems As a result of intensive studies for solving the above-mentioned problems, the present inventor has provided two reaction tanks containing a microorganism carrier carrying an aerobic microorganism, and these two reaction tanks are provided. It is possible to sufficiently supply the nutrient source and oxygen to the microorganisms by moving the liquid containing the microbial nutrient source such as wastewater between the two, and to realize this method with a simple structure. The present invention has been completed based on the idea that it can be done.

That is, the microbial reaction apparatus according to claim 1 of the present application comprises a first reaction tank and a second reaction tank for treating a microbial nutrient source-containing liquid (for example, waste water from a livestock house) with microorganisms, A microbial reaction apparatus comprising a communication means capable of communicating the inner spaces of the first reaction tank and the second reaction tank, wherein each of the first reaction tank and the second reaction tank A microbial carrier capable of supporting microorganisms and an oxygen supply means for releasing an oxygen-containing gas (typically air) are provided in the tank space, and the first reaction is carried out. Each of the tank and the second reaction tank is characterized by having an exhaust control valve provided above the microorganism carrier for exhausting the oxygen-containing gas in the tank. According to this structure, the microbial nutrient source-containing liquid such as wastewater can be alternately moved between the first reaction tank and the second reaction tank by operating the exhaust control valve or the like. The microorganisms carried on the carrier are supplied with a nutrient source when immersed in a microbial nutrient source-containing liquid, and are exposed to a high level of aerobic atmosphere when aerated in an oxygen-containing gas. , The growth rate is significantly increased.

Specific examples of the communication means of the microbial reaction apparatus include the following. That is, in an example of the specific mode of the communication means, the communication means communicates the opening formed in the first reaction tank with the opening formed in the second reaction tank. It is a communication passage, each of the opening of the first reaction tank and the opening of the second reaction tank, the lower end of the microbial carrier in the first reaction tank, and the second reaction tank It is provided so as to be located below any of the lower ends of the above-mentioned microorganism carrier (claim 2). With this configuration, no power is required to move the microbial nutrient source-containing liquid between the two reaction tanks, which saves energy and has a simple structure, which facilitates the production and maintenance of the device. Is.

In another example of the specific embodiment of the communicating means, the communicating means supplies the microbial nutrient source-containing liquid in the first reaction tank to the second reaction tank. Means and a second communication means for supplying the microbial nutrient source-containing liquid in the second reaction tank to the first reaction tank, the first communication means, the first reaction A water intake section arranged below the microorganism carrier in the tank, a water sprinkling section arranged above the microorganism carrier in the second reaction tank, and the water intake section and the water sprinkling section are connected to each other. The second communication means, a water intake section disposed below the microorganism carrier in the second reaction tank, and the microorganisms in the first reaction tank. It is provided with a water sprinkling portion arranged above the carrier and a pipe line connecting the water intake portion and the water sprinkling portion (claim) 3). If configured in this way, from the watering section disposed above the microbial carrier, since the microbial nutrient source-containing liquid is sprayed, the microorganisms in the microbial nutrient source-containing liquid are easily carried by the microbial carrier, The growth rate of microorganisms in the microorganism carrier can be further increased.

In the above-mentioned microbial reaction apparatus, in each of the first reaction tank and the second reaction tank, the liquid level of the microbial nutrient source-containing liquid reaches a predetermined height above the microbial carrier. It is possible to have a liquid level sensor for detecting the fact (claim 4). By providing the liquid level sensor in this manner, the liquid level sensor and the exhaust control valve and the like can be interlocked with each other to smoothly and quickly move the microbial nutrient source-containing liquid between the two reaction tanks.

The method for treating a microbial nutrient source-containing liquid according to claim 5 of the present application is a method for treating a microbial nutrient source-containing liquid with a microorganism, which comprises using a first reaction tank and a second reaction tank. A method for treating a liquid, wherein a microbial carrier is disposed in the inner space of each of the first reaction tank and the second reaction tank, and a predetermined microorganism is carried on the microbial carrier. After that, by alternately moving the microbial nutrient source-containing liquid between the first reaction tank and the second reaction tank, the microbial carrier in the first reaction tank,
Immersed in the microbial nutrient source-containing liquid, and the microbial carrier in the second reaction tank, a state aerated in oxygen-containing gas, the microbial carrier in the first reaction tank Is aerated in an oxygen-containing gas, and the microbial carrier in the second reaction tank, the state of being immersed in the microbial nutrient source-containing liquid, configured to appear alternately. Characterize. Here, as an example of the microorganism,
An example is a bacterium belonging to the genus Bacillus, which is an aerobic gram-positive bacillus (claim 6).

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Examples of the microbial nutrient source-containing liquid to be treated by the microbial reaction apparatus of the present invention include:
Examples include various wastewaters and nutrient solutions containing nutrient components suitable for culturing microorganisms. Examples of the wastewater include wastewater containing human waste from pig farms, wastewater from food manufacturing plants, wastewater from ordinary households, and the like. As a nutrient solution containing nutrient components suitable for culturing microorganisms, for example, polysaccharides such as starch,
Monosaccharides, proteins, amino acids, fatty acids, nitrogen-containing compounds,
A compound containing a phosphoric acid-containing compound and various minerals is used. The nutrient solution may be prepared by adding additional nutritional ingredients based on sterilized human waste from a livestock barn or the like, or may be prepared by adding all nutritional ingredients to water. . When wastewater is treated, the main purpose is to purify wastewater, and when nutrient solution is treated,
The main purpose is to produce useful substances such as antibiotics by culturing microorganisms.

As the microorganisms used in the microbial reaction apparatus of the present invention, aerobic microorganisms are used. Among them, bacteria belonging to the genus Bacillus, yeasts and the like are preferably used. Bacteria belonging to the genus Bacillus are Gram-positive bacilli and are particularly preferably used because they have a sporulation ability. Examples of bacteria belonging to the genus Bacillus include Bacill
us thuringiensis , Bacillus pumilus , Bacillus megat
erium , Bacillus subtilis , Bacillus amyloquefacien
s , Bacillus natanus , Bacillus licheniformis , Bacil
lus polymyxa , Bacillus macerans , Bacillus coagulan
s , Bacillus pasteurii , Bacillus sphaericus , Bacill
us fastidiosus , Bacillus alcei , Bacillus brevis , B
acillus scirculans and the like.

The mechanism by which the bacteria of the genus Bacillus can efficiently treat wastewater is as follows. Bacillus bacteria are prokaryotic microorganisms,
It is characterized by its ability to secrete enzymes that decompose and digest polysaccharides such as starch, monosaccharides, proteins, peptides, pectins, amino acids, oils and fats to the outside of the body and to decompose organic substances in the liquid containing microbial nutrients. . It is also known that Bacillus bacteria decompose and absorb malodorous components such as hydrogen sulfide, diethylamine, and ammonia, and decompose uric acid, lignin, pigments, and the like. Furthermore, it is also known that Bacillus bacteria digest and absorb the carcasses of anaerobic microorganisms containing many pathogenic bacteria in a highly aerobic atmosphere.

Bacteria belonging to the genus Bacillus are a nutrient source for sporulation in the process of sporulation by the sporulation gene cascade from Spo0 to SpoVI under conditions of hypotrophy and hypoxia. In order to secure the above, denitrification and dephosphorization from the microbial nutrient source-containing liquid are promoted. At this time, most of the aerobic microorganisms that do not form endospores are killed because they are under conditions of oligotrophic and hypoxic conditions, and the surviving ones are bacteria of the genus Bacillus. It is killed by antibiotics such as polymyxin that is secreted in the early stages of the transformation process. As a result, the bacteria of the genus Bacillus are dominant. Bacteria of the genus Bacillus that have been sporulated (spores) have a specific gravity of greater than 1, and therefore can be precipitated and easily recovered. In addition, in sporulation of Bacillus bacteria, an inorganic substance containing silicon oxide and magnesium sulfate as main components, which is necessary for floc formation, is required.
Therefore, after the Bacillus bacteria are grown in the upstream reaction tank under nutrient-rich and aerobic conditions, the Bacillus bacteria are grown in the downstream reaction tank under oligotrophic and hypoxic conditions. If the endospores are transformed into endospores, a liquid containing a microbial nutrient source such as waste water can be efficiently treated.

The microbial reaction apparatus of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view showing an example (first embodiment) of the microbial reaction device of the present invention, FIG. 2 is a cross-sectional view taken along the line AA in FIG. A cross-sectional view showing another example (second embodiment) of the microbial reaction device of the present invention, FIG. 4 is a cross-sectional view taken along the line BB in FIG. 3, and FIG. FIG. 6 is a schematic diagram showing an example of a wastewater treatment system including the microbial reaction device shown in FIG. 3, and FIG. 6 is a schematic diagram showing an example of a useful substance production system including the microbial reaction device shown in FIG.

First, a first embodiment of the microbial reaction device of the present invention will be described. 1 and 2, the microbial reaction apparatus 1 includes a first reaction tank 2 and a second reaction tank 3 as main constituent parts. First reaction tank 2 and second reaction tank 3
Each is formed as a rectangular parallelepiped box, and has a tank internal space (cavity) for containing a microbial nutrient source-containing liquid (for example, waste water or nutrient liquid). Further, the first reaction tank 2 and the second reaction tank 3 are arranged in a state in which the tank internal spaces are communicated with each other by the communication passage 4.

The first reaction tank 2 and the second reaction tank 3
May be separately manufactured as a box having an opening for the communication passage 4 at the bottom and then connected by welding or the like, or in the case of one box formed in a rectangular parallelepiped shape, its ceiling The partition wall may be made to hang down from the center of the lower surface of the wall, and the communication path 4 may be formed between the lower end and the bottom surface of the partition wall. When the first reaction tank 2 and the second reaction tank 3 are produced separately, the communication passage 4 is provided in the lower part of each of the first reaction tank 2 and the second reaction tank 3 other than that shown in FIG. It is also possible to form by forming an opening in each of the openings and connecting the openings with a conduit having an appropriate length. Further, these reaction tanks 2 and 3 may be formed in a columnar shape, a hexagonal columnar shape or the like, instead of the rectangular parallelepiped shape.

The first reaction tank 2 has a rectangular parallelepiped-shaped microbial carrier fixed in the tank, an inlet 6 for introducing a microbial nutrient source-containing liquid, and a gas for evacuating the tank. For this purpose, an exhaust control valve 7, an aeration device (oxygen-containing gas supply means) 8, a liquid level sensor 9, and a heat dissipation plate 10 are provided.

The microorganism carrier 5 may have any structure as long as it can support microorganisms. For example, three-dimensionally stacked general-purpose filters made of fibers, vertically folded coarse net-like cloth made of fibers, and a large number of small porous spheres or cubes that are assembled and fixed together , A honeycomb structure made by stacking porous plates with corrugated cross sections, and a large number of small porous spheres and cubes in a rectangular parallelepiped frame made of mesh plates (however, , Small porous spheres and cubes have a relatively small specific gravity and are configured so that they can freely float in a frame when immersed in a liquid). it can.

When the flexible fiber is used, the microbial carrier 5 is constructed by surrounding the flexible fiber with a rectangular parallelepiped frame body having a rough mesh shape or the like. Also,
When using a microbial support having a honeycomb structure, the microbial support 5 is arranged in the reaction tanks 2 and 3 with the openings of the honeycomb structure oriented in the vertical direction. As a material of the microorganism carrier 5, it is necessary to use a material having biocompatibility, not being eroded by microorganisms, and having a certain strength or more. Here, the bio-affinity means that it has a polarity opposite to the charged polarity of the microorganism, that the microorganism is easily attached, and that it has an affinity for water and tends to retain water. .

The material of the microorganism carrier 5 has oxygen permeability, does not contain atoms such as chlorine, does not pollute the environment after disposal (has environmental compatibility), and has a coating layer. It is more preferable as long as it can be easily formed or formed into a fibrous shape or a granular shape, and that the price is low. Specific examples of the material of the microorganism carrier 5 include vinylidene chloride, synthetic resins such as polypropylene, and inorganic substances such as zeolite, silicon oxide, glass, and carbon materials. The microbial carrier 5 is provided in the reaction tanks 2 and 3 at positions such that appropriate spaces are formed above, below, and laterally of the microbial carrier 5 by a supporting means such as a supporting rod. A few
Fixed inside.

The inflow port 6 is arranged so that the microbial nutrient source-containing liquid falls on the upper surface of the microbial carrier 5. Inlet 6
An inflow adjusting valve 12 is provided outside the reaction tank 2 in the inflow pipe 11 having the above, and supplies and stops the microbial nutrient source-containing liquid every 1 cool (a predetermined amount of liquid per treatment). It is like this.

The exhaust control valve 7 is provided above the microorganism carrier 5. More specifically, the exhaust control valve 7 is arranged above the liquid level detection portion of the liquid level sensor 9 located above the microbial carrier 5 so as not to let the microbial nutrient source-containing liquid flow out. ing. The exhaust control valve 7 is computer-controlled by an electromagnetic valve, but may be controlled in a relay type or a mechanical type in cooperation with the liquid level sensor 9. The oxygen-containing gas discharged from the exhaust control valve 7 to the outside of the tank can be sent to an intake section (not shown) of the aeration device 8 and reused.

Aeration device (oxygen supply means) 8
Is a porous aeration main body for releasing the oxygen-containing gas into the tank, an air supply pipe for supplying the oxygen-containing gas to the aeration main body, and a flow rate of the oxygen-containing gas from the intake part. Alternatively, it includes an inflow air adjusting valve 13 for stopping and an intake portion (not shown). As the aeration device 8, for example, a general-purpose aeration device used in the conventional activated sludge method can be used. However, when the BOD value in the microbial nutrient source-containing liquid such as wastewater is large and there is a possibility that the microorganisms are excessively attached to the microorganism carrier 5, the microorganisms should be blown off.
It is necessary to use a device with strong aeration ability.

The liquid level sensor 9 detects when the liquid level of the microbial nutrient source-containing liquid in the reaction tank 2 rises and reaches a predetermined position above the microbial carrier 5 by the liquid level detecting section, It is configured to prevent further elevation of the surface. The heat radiating plate 10 is provided as necessary in order to suppress a temperature increase due to heat generation due to the growth of microorganisms.

In the second reaction tank 3, instead of the inflow port 6,
The first reaction tank 2 is configured similarly to the first reaction tank 2 except that the drain port 14 is provided. That is, the second reaction tank 3 includes an aeration device (oxygen-containing gas supply device) 18 having a microorganism carrier 15, a drainage port 14, an exhaust control valve 16, and an inflow air control valve 17, and a liquid level sensor 19. And the heat sink 20
It has and. Further, a drain pipe 21 having a drain port 14
An outflow adjusting valve 22 is attached to the outside of the second reaction tank 3 so that the liquid containing the microbial nutrient source can be discharged and stopped for each cool. When each of the first reaction tank 2 and the second reaction tank 3 is formed in, for example, a rectangular parallelepiped shape, it is preferable that the bottom has a dimension of about 1 to 1.5 m square and a height of about 4 m.

Next, a method of operating the microbial reaction apparatus 1 shown in FIGS. 1 and 2 will be described. First, the inflow adjusting valve 12 is opened to allow a liquid containing a microbial nutrient source (specifically, wastewater, a nutrient liquid for culturing microorganisms, etc.) to flow into the first reaction tank 2 from the inlet 6. At this time, the exhaust control valve 16
The outflow adjusting valve 22 is closed, and the exhaust adjusting valve 7 is opened. Further, the inflow air adjusting valve 17 is closed, the inflow air adjusting valve 13 is opened, and only the aeration device 8 is operated.

In this case, the second reaction tank 3 is filled with oxygen-containing gas (air) and is hermetically sealed. Therefore, after the liquid level of the microbial nutrient source-containing liquid rises to the upper end of the communication passage 4, the liquid level of the microbial nutrient source-containing liquid rises only in the first reaction tank 2. Then, the liquid level of the microbial nutrient source-containing liquid continues to rise in the first reaction tank 2 and, after exceeding the upper end of the microbial carrier 5, the inflow adjusting valve 12 is closed and the first reaction tank 2 The supply of the liquid containing the microbial nutrient source to the inside is stopped. The above is a process (A).

Next, the exhaust adjusting valve 7 is closed, the exhaust adjusting valve 16 is opened, and both the inflow air adjusting valve 13 and the inflow air adjusting valve 17 are opened, and the first reaction tank 2 and the second reaction Aeration in the tank 3 is started. In this case, since the exhaust control valve 7 is closed and the exhaust control valve 16 is open, the oxygen-containing gas is accumulated in the upper part of the first reaction tank 2 and the microbial nutrient source-containing liquid in the first reaction tank 2 is stored. The liquid level of the liquid containing the microbial nutrient source in the second reaction tank 3 rises as the liquid level of the liquid decreases. Then, the liquid level of the microbial nutrient source-containing liquid continues to rise in the second reaction tank 3, exceeds the upper end of the microbial carrier 15, and finally, the liquid level sensor 19
Is detected by the liquid level detection unit. The above is a process (B).

After being detected by the liquid level sensor 19, the exhaust adjusting valve 16 is closed and the exhaust adjusting valve 7 is opened. Then, in the microbial nutrient source-containing liquid, contrary to the step (B), the oxygen-containing gas is accumulated in the upper part of the second reaction tank 3, and the liquid surface of the microbial nutrient source-containing liquid in the second reaction tank 3 And the liquid level of the liquid containing the microbial nutrient source in the first reaction tank 2 rises. Then, the liquid level of the microbial nutrient source-containing liquid continues to rise in the first reaction tank 2 and exceeds the upper end of the microbial carrier 5,
Finally, it is detected by the liquid level detection unit of the liquid level sensor 9. The above is a process (C). After the step (C), the same steps as the steps (B) and (C) are alternately repeated. After the elapse of a predetermined time, when the liquid containing the microbial nutrient source is stored in the second reaction tank 3, the outflow adjusting valve 22 of the second reaction tank 3 is opened to treat the treated microbial nutrient source. The contained liquid is discharged from the drain port 14 through the drain pipe 21. The residence time of the microbial nutrient source-containing liquid in the microbial reaction apparatus 1 varies depending on the volume of the reaction tank and the concentration of organic substances and the like in the microbial nutrient source-containing liquid, but is usually 8 to 6
It takes about 0 minutes. The movement of the microbial nutrient source-containing liquid between the first reaction tank 2 and the second reaction tank 3 varies depending on the size of the reaction tank and the like, but is usually about 0.1 to 5 times / minute (however,
One round trip is required. ).

Next, a second embodiment of the microbial reaction device of the present invention will be described with reference to FIGS. Figure 3
Further, in FIG. 4, the microbial reaction device 31 includes a first reaction tank 32.
And the second reaction tank 33 are arranged separately. In each of the first reaction tank 32 and the second reaction tank 33, the microorganism carrier 5,15, the aeration devices 8,18, the exhaust control valves 7,16, the liquid level sensors 9,19, the heat radiating plate 10, Two
The point that 0 is provided is the same as in the first embodiment shown in FIGS. 1 and 2.

In the second embodiment, in place of the communication passage 4 in the first embodiment, a microbial nutrient source-containing liquid in the first reaction tank 32 is supplied to the second reaction tank 33. It is provided with one communication means 34 and second communication means 35 for supplying the microbial nutrient source-containing liquid in the second reaction tank 33 to the first reaction tank 32.

The first communication means 34 is the first reaction tank 32.
A water intake section 36 disposed below the microbial carrier 5;
In the second reaction tank 33, a water sprinkler 37 arranged above the microorganism carrier 15, a pipe 38 connecting the water intake 36 and the water sprinkler 37, and a pipe 38 provided in the middle of the pipe 38. The water spray adjusting valve 39 is provided. Second communication means 35
Is a water intake section 40 arranged below the microorganism carrier 15 in the second reaction tank 33, and a water sprinkling section 41 arranged above the microorganism carrier 5 in the first reaction tank 32. , A pipe line 42 connecting the water intake unit 40 and the sprinkler unit 41, and a pipe line 4
2 is provided with a water spray adjusting valve 43.

An inflow pipe 44 for inflowing the microbial nutrient source-containing liquid is connected to the sprinkling section 41, and the inflow pipe 4
In the middle of 4, an inflow adjustment valve 12 for supplying and stopping the microbial nutrient source-containing liquid is provided for each cool. A drainage pipe 45 for discharging the microbial nutrient source-containing liquid is connected to the water intake unit 40, and an outflow for discharging and stopping the microbial nutrient source-containing liquid is performed in each course of the drainage pipe 45. A regulating valve 22 is provided.

Next, a method of operating the microbial reaction device 31 shown in FIGS. 3 and 4 will be described. First, with the sprinkling adjustment valve 43 closed and the exhaust adjustment valve 7 open, the inflow adjustment valve 12 is opened to supply the microbial nutrient source-containing liquid from the inflow pipe 44 into the first reaction tank 32. At this time, the inflow air adjusting valve 17 is closed and the inflow air adjusting valve 13 is opened so that the oxygen-containing gas is released only from the aeration device 8. In this case, the microbial nutrient source-containing liquid is stored only in the first reaction tank 32. The liquid level of the microbial nutrient source-containing liquid continues to rise in the first reaction tank 32, and after passing over the upper end of the microbial carrier 5, the inflow adjustment valve 12 is closed and enters the first reaction tank 32. The supply of the liquid containing the microbial nutrient source is stopped. The above is a process (A).

Next, the exhaust adjusting valve 7 and the sprinkling adjusting valve 43
The outflow adjusting valve 22 is closed, and the exhaust adjusting valve 16 and the sprinkling adjusting valve 39 are opened. In addition, the inflow air adjustment valve 13
And the inflow air adjusting valve 17 are opened, and the first reaction tank 32 is opened.
And aeration in the second reaction tank 33 is started. In this case, since the exhaust control valve 7 is closed and the exhaust control valve 16 is open, the oxygen-containing gas is accumulated in the upper part of the first reaction tank 32, and the liquid of the microbial nutrient source-containing liquid in the first reaction tank 32 is stored. The surface is pushed down, and the microbial nutrient source-containing liquid is taken from the water intake portion 36 of the first reaction tank 32, rises in the pipe 38, and is sprayed from the water spray portion 37 into the second reaction tank 33. The microbial nutrient source-containing liquid sprayed is the microbial carrier 1
After dropping on 5, it flows down along the microbial carrier 15,
It falls to the bottom of the second reaction tank 33. Second reaction tank 3
The liquid level of the microbial nutrient source-containing liquid in 3 rises and exceeds the upper end of the microbial carrier 15, and finally, the liquid level sensor 19
Is detected by the liquid level detection unit. The above is a process (B).

After being detected by the liquid level sensor 19, the exhaust adjusting valve 16 and the sprinkling adjusting valve 39 are closed, and the exhaust adjusting valve 7 and the sprinkling adjusting valve 43 are opened. Then, contrary to the step (B), the oxygen-containing gas accumulates in the upper part of the second reaction tank 33,
The liquid surface of the microbial nutrient source-containing liquid in the second reaction tank 33 is pushed down, and the microbial nutrient source-containing liquid is taken from the water intake device 40 of the second reaction tank 33, rises in the pipe line 42, and is sprinkled. It is sprayed from the device 41 into the first reaction tank 32. The sprayed microbial nutrient source-containing liquid drops on the microbial carrier 5 and then flows down along the microbial carrier 5 to form the first reaction tank 3
2 falls to the bottom. The liquid level of the microbial nutrient source-containing liquid in the first reaction tank 32 rises, crosses the upper end of the microbial carrier 5, and finally is detected by the liquid level detection unit of the liquid level sensor 9. The above is a process (C).

After the step (C), the above step (B) is further performed.
And step (C) are alternately repeated. After a predetermined time (residence time for microbial reaction) has passed, the second reaction tank 3
When the microbial nutrient source-containing liquid is stored in 3, the sprinkle adjusting valve 43 is closed, the exhaust adjusting valve 16 and the outflow adjusting valve 22 are opened, and the treated microbial nutrient source-containing liquid is drained by the drain pipe 45. Exhaust through. Simultaneously with the discharge of the treated microbial nutrient source-containing liquid, one cool of the microbial nutrient source-containing liquid to be treated next is supplied from the inflow pipe 44 to the first reaction tank 32.
Let it flow in. At this time, the inflow air adjusting valve 17 is closed, the inflow air adjusting valve 13 is opened, and the first reaction tank 3 is closed.
Aerate only within 2. Microbial reactor 3
The residence time of the microbial nutrient source-containing liquid in 1 and the number of times of transfer of the microbial nutrient source-containing liquid between the first reaction tank 32 and the second reaction tank 33 are the same as those in the first embodiment (microorganism reaction apparatus 1). Is the same as.

Next, a wastewater treatment system using the microbial reactor 31 of the present invention shown in FIG. 3 will be described. In FIG. 5, the wastewater treatment system includes a storage tank 51, a microbial reactor 31 (first reaction tank 32 and second reaction tank 33), a first aeration tank 52, and a first aeration tank 52 in order from the upstream side to the downstream side. The second aeration tank 53, the denitrification / sporification tank 54, and the precipitation tank 55 are arranged.

The wastewater first flows into the storage tank 51 through the filter 56 for removing dust and the like. Storage tank 51
Has a role of storing foul wastewater having a non-uniform inflow rate and adjusting the flow rate of the microbial nutrient source-containing liquid in the wastewater treatment system. An aeration device 57 is arranged in the storage tank 51 so that the microorganisms returned from the denitrification / sporification tank 54 and the precipitation tank 55 can grow in the storage tank 51. The concentration of microorganisms in the waste water in the storage tank 51 is set to a high density state of 5,000 mg / liter or more in MLSS value. As a result, it is possible to prevent clogging of the microbial carrier 5, 15 (see FIG. 3) due to filamentation of the microorganism.

The waste water in the storage tank 51 is supplied to the inflow adjusting valve 1
2 is opened, the flow rate is adjusted by the flow rate adjusting device 58, and the mixture flows into the microbial reaction device 31. At this time, the microorganisms grown in the storage tank 51 also flow into the microbial reaction device 31 together with the waste water. In the microbial reaction device 31,
Microorganisms given sufficient oxygen and nutrients (organic substances in wastewater, etc.) actively grow and proliferate, and organic substances in wastewater are decomposed and absorbed by microorganisms. The wastewater treated in the microbial reaction device 31 is supplied into the first aeration tank 52 by opening the outflow adjusting valve 22.

The first aeration tank 52 is for promoting the flocculation of the filamentous mass of microorganisms formed in the microbial reactor 31. By becoming flocs, microorganisms are more likely to become spores. In order to promote flocking, a mineral agent mainly containing silicon oxide and magnesium sulfate is put into the first aeration tank 52. In the first aeration tank 52, the organic matter is thoroughly removed, the wastewater becomes in an oligotrophic state, and the conditions for sporulation of microorganisms are adjusted. An aeration device 59 is arranged in the first aeration tank 51, and a relatively large amount of oxygen is supplied to the waste water.

The second aeration tank 53 is the aeration device 6
The amount of oxygen supplied from 0 is 10 to 20% of that of the first aeration tank 52.
It is intended to induce denitrification by microorganisms and sporulation of microorganisms, and to prepare for release of antibiotics. In the second aeration tank 53, the microorganism initiates the gene cascade for spore formation.

The denitrification / sporification tank 54 contains 1 mg of dissolved oxygen.
To reduce the amount of oxygen supplied from the aeration device 61 to about 10% of the first aeration tank 52,
The purpose is to carry out full-scale denitrification and release of antibiotics, and to promote full-scale spore formation (spore formation) of microorganisms. In this process, the remaining nitrogen and phosphorus are taken up by the spores in the form of peptidoglycan, dipicolinic acid, polyphosphoric acid, DNA, etc., and nitrogen and phosphorus are removed.

In the denitrification / sporification tank 54, a return conduit 6 for returning the wastewater to the storage tank 51 and the first aeration tank 52.
Two are provided. The return conduit 62 is branched by the flow rate adjusting device 63, passes through the inflow adjusting valve 64, and enters the storage tank 5.
1 is divided into a part that is guided into the first aeration tank 52 and a part that is guided into the first aeration tank 52 through the inflow adjustment valve 65. The amount of liquid returned to the storage tank 51 depends on the BO of the waste water in the storage tank 51.
It is appropriately determined according to the D concentration.

A drainage port is provided in the denitrification / sporification tank 54, and by opening the inflow adjusting valve 66, the wastewater in the denitrification / spore formation tank 54 flows into the precipitation tank 55. ing. The settling tank 55 is for collecting and removing sporulated microorganisms. A portion near the liquid surface of the waste water in the settling tank 55 (a portion not containing sporulated microorganisms) is discharged from the drain port. Further, in the settling tank 55, there is provided a pipe line 68 for returning the wastewater (a part where the sporulated microorganisms are settled) near the bottom surface of the settling tank 55 to the storage tank 51 and supplying it to the dehydrator 67. It is provided.
The pipe line 68 is branched by the flow rate adjusting device 69 and divided into a part that is guided into the storage tank 51 through the inflow adjusting valve 70 and a part that is passed through the inflow adjusting valve 71 into the dehydrating device 67. There is. The amount of liquid returned to the storage tank 51 is appropriately determined according to the BOD concentration of the waste water in the storage tank 51. The dehydration device 67 is for dehydrating excess sludge composed of sporulated microbial cells. is there. The dehydrated surplus sludge can be used as a compost or a soil conditioner.

Next, a useful substance production system for culturing a microorganism to obtain a useful substance derived from the microorganism will be described. FIG. 4 is a diagram showing an entire useful substance production system including the microbial reaction device 31 shown in FIG. The nutrient solution storage tank 81 stores a sterile nutrient solution containing sugars, starches, proteins, amino acids, fatty acids, nitrogen-containing compounds, phosphoric acid, minerals, etc., which are nutrient sources of microorganisms to be cultured. There is. When culturing bacteria of the genus Bacillus,
As the nutrient solution, it is desirable to use a solution obtained by sterilizing the human waste of omnivorous animals. The nutrient solution is
It is supplied from the upper part of the nutrient solution storage tank 81 by opening the inflow adjustment valve 82. The inflow air adjusting valve 83 is opened and the oxygen-containing gas is supplied from the aeration device 84 into the nutrient solution storage tank 81.

A drainage conduit is attached to the lower portion of the nutrient solution storage tank 81, and is connected to the microbial reaction device 31 via a flow rate adjusting device 85. Microbial reactor 3
As described above, 1 is a device for growing microorganisms, and microorganisms to be cultured are attached to the microorganism carriers 5, 15 (see FIG. 3) in advance. Microbial reactor 31
The sporulation promoting device 86 disposed on the downstream side of is configured to adjust the aeration amount of the aeration device 88 stepwise by the inflow air adjusting valve 87. In the first stage, sufficient air is supplied to grow microorganisms. In the second step, the oxygen supply is reduced so that the dissolved oxygen content becomes 1 mg / L or less, and the grown microorganisms are sporulated. In the nutrient solution in the sporulation promoting device 86,
If necessary, a sporulation promoter can be added.

The nutrient solution in the vicinity of the bottom surface of the sporulation promoting device 86 (including sporulated microorganisms) is returned to the nutrient solution storage tank 81 by the return conduit 89. Return line 89
Is provided with a flow rate adjusting device 90 and an inflow adjusting valve 91. The nutrient solution in the sporulation promoting device 86, except for the water taken in the return conduit 89, is an inflow adjusting valve 92.
And sent to the spore separation device 93. The nutrient solution in the vicinity of the bottom surface of the spore separating device 93 (the sporulated microorganisms are precipitated) is supplied to the nutrient solution storage tank 81 and the dehydrating device 94 by the conduit 95. The pipe line 95 is branched by the flow rate adjusting device 96 into a part that is guided into the nutrient solution storage tank 81 through the inflow adjusting valve 92 and a part that is guided into the dehydrating device 94 through the inflow adjusting valve 97. I know.
The microbial cells dehydrated by the dehydrator 94 can be used as compost, soil improver, or the like. Spore separation device 93
The treated liquid obtained by draining the nutrient liquid in the vicinity of the liquid surface does not contain sporulated microorganisms and contains useful substances (antibiotics etc.) produced by the microorganisms. The useful substance is separated and recovered from the treated liquid.

[0052]

Example [Production of wastewater treatment system] As the microbial reaction apparatus 31 (see FIG. 3), two reaction tanks having a bottom of 0.5 m square and a height of 3 m are connected to each other, and the first embodiment shown in FIG. A reactor including the reaction tank 32 and the second reaction tank 33 was prepared. On the other hand, a metal net with a diameter of 0.4 mm and a 2.5 mm mesh and a height of 2.4 m is folded into a bellows shape with a side of 2 cm and stretched so that each side becomes one side of an equilateral triangle, and it is flattened. Alternately stacked and pasted with the net of No. 3, and formed into a shape with many vertical triangular holes. This was immersed in a polypropylene diluting solution to prepare microbial carrier 5, 15 having a polypropylene coating layer on the surface. The biofilm area of this microbial carrier is 1,480 m ² , and has a performance equivalent to 29,160 mg / L in terms of MLSS.

The exhaust control valves 7 and 16 are constructed by using solenoid valves so as to be controlled in conjunction with the liquid level sensors 9 and 19. The aeration devices 8 and 18 are configured by arranging a plurality of porous plates in parallel. The water sprinkling parts 37, 41 are each formed with six tubes each having a plurality of holes so that the microbial nutrient source-containing liquid can be uniformly sprayed on the microbial carriers 5, 15, and the reaction tank 32 , 33, and fixed at the top. The water intake parts 36 and 40 are the reaction tank 3
After forming a valley having a V-shaped cross section with two inclined iron plates at the bottom of Nos. 2 and 33, the valleys were arranged at the bottom of the valley (see FIG. 4). As the water intake pipe constituting the water intake part, one having 10 water intake holes with a diameter of 8 mm was used.

The prepared microbial reactor has a maximum treatment capacity of 19.8 m ³ / day of the microbial nutrient source-containing liquid and a BOD of 4.
It was capable of handling 3 kg / day. The reason for having such a large processing capacity is as follows. That is,
By completely placing the microbial carrier on which the aerobic microorganisms are densely attached and in the air and immersing the microbial carrier in the oxygen-rich microbial nutrient-containing solution by alternately using two reaction tanks, Microorganisms can efficiently exchange oxygen as in lung breathing. Thereby,
The depth at which oxygen permeates the microbial membrane attached to the microbial carrier is determined by the microbial nutrient source-containing liquid that supplies oxygen.
The limit was 0.3 mm from the surface, but with this method it was about 1.2 mm. This means that the efficiency of the reaction is increased about 3 to 4 times. For example, the microbial membrane in the microbial nutrient source-containing liquid is 6,200 mg / L in terms of MLSS,
The microbial membrane in the method of the present invention is converted to MLSS.
It is 22,320 mg / L. It usually took 15 to 20 days to dominate the Bacillus bacterium and adapt it to raw water. After achieving the dominance and adaptation to raw water, the wastewater became stable. It was confirmed that there is no problem in the operation of the wastewater treatment system even with changes in the load of raw water (for example, changes in the concentration of microbial nutrient components).

The wastewater treatment system was constructed as shown in FIG. Also for the storage tank 51, the denitrification / sporification tank 54
Since the waste water containing microorganisms was returned from the above, the microorganisms were active in the storage tank 51, and the odor from the storage tank 51 was hardly sensed. Hereinafter, experimental examples using various wastewaters will be described in detail.

[Example 1] Microbial reactor 31 prepared
An experiment was conducted to confirm the purification capacity of wastewater from pig farms using a wastewater treatment system that includes the above. Pig wastewater daily amount of livestock pens is 3.8 m ^3, the waste water of BOD (biochemical oxygen demand) is 11,631mg / L, COD (chemical oxygen demand) of 6,822mg / L, suspended solids ( The SS) was 12,106 mg / L, the total nitrogen content (TN) was 4,614 mg / L, and the total phosphorus content (TP) was 402 mg / L. After removing dust and the like with a 0.75 mm fine mesh screen 56 (see FIG. 5), 80% by volume of the returned sludge was returned from the settling tank 55 to the storage tank 51 having a volume of 9.3 m ³ to make the bacterial density high. Air was supplied from the aeration device 57 at 0.15 m ³ / min. At this stage, the stench almost disappeared.
Next, one cool (one treatment unit amount) of waste water was supplied from the storage tank 51 to the first reaction tank 32 of the microbial reaction apparatus 31. Waste water is alternated between the first reaction tank 32 (volume: 0.75 m ³ ) and the second reaction tank 33 (volume: 0.75 m ³ ) at a repetition rate of 4.4 times / minute. Moved to.
The retention time of the wastewater (microorganism reaction time) was 28 minutes.
After the retention, the waste water discharged from the second reaction tank 33 was collected and analyzed. The BOD in the waste water was 465 ml / L and the COD was 396 ml.
/ L, suspended solids were 472 mg / L, total nitrogen content was 138 mg / L, and total phosphorus content was 10.8 mg / L.

The waste water discharged from the second reaction tank 33 of the microbial reactor 31 is the first aeration tank 52 (volume: 6 m ³ ) which is the first aeration tank among the ^three aeration tanks. Was supplied to. The first aeration tank 52 contains 6.6k of mineral components (including silicic acid, magnesium, calcium, manganese, selenium, etc.) for promoting the growth and sporulation of microorganisms.
It was added at a feed rate of g / day. In addition, in the first aeration tank 52,
70% of the aeration volume (supply air volume) of the entire three aeration tanks was allocated to create a high level aerobic atmosphere. As a result, the remaining BOD that was not treated by the microbial reactor 31 was removed, and the wastewater became oligotrophic.

Next, the second aeration tank 5 which is the second aeration tank
In 3 (volume: 3 m ³ ), 20% of the aeration volume of the three aeration tanks was supplied to further promote oligotrophic conditions and to provide microorganisms with a place for denitrification and sporulation. . The third aeration tank, the denitrification / sporification tank 54 (volume: 3 m ³ ), supplies 10% of the aeration volume of the three aeration tanks to release nitrogen and sporulate microorganisms. Let When the wastewater discharged from the denitrification / sporification tank 54 was collected and analyzed, the BOD in the wastewater was 9.8 ml /
L, COD is 12 ml / L, suspended matter is 11 mg / L, total nitrogen content is 2.1 mg / L.
The amount of L and total phosphorus was 0.5 mg / L. E. coli 30% before treatment
There were 000 cells / mL, but at this stage they were all gone.

The wastewater was sent from the denitrification / sporification tank 54 to the settling tank 55. The sporulated microorganisms in the wastewater settled in the settling tank 55. Wastewater containing spores of microorganisms was recovered from near the bottom of the settling tank 55 through a pipe 68 having a water intake port, and a part (20% by volume) thereof was supplied to a dehydrator 67. The wastewater sent to the dehydrator 67 was dehydrated and accumulated as excess sludge. The amount of surplus sludge obtained is 1
It was 6.17 kg per day. This excess sludge can be effectively used as a soil conditioner and the like. In pig farms, various odorous components are generated from wastewater. The malodorous components include ammonia, hydrogen sulfide, methyl mercaptan, dimethylamine, trimethylamine, lower fatty acids and the like. All of these malodorous components could be removed during the wastewater treatment process. In addition, the above-mentioned measured value is an average of the values measured in the wastewater treatment 10 times. The measured values described above are summarized in Tables 1 and 2.

[0060]

[Table 1]

[0061]

[Table 2]

[Example 2] Wastewater of a milk beverage manufacturing plant was treated, and the wastewater was purified in the same manner as in Example 1.
The amount of wastewater was 6 m ³ / day. The residence time of wastewater in the microbial reactor was 23 minutes, and the number of times wastewater was transferred between the first reaction tank and the second reaction tank was 1.3 times / minute. The results are shown in Table 3. The measured values in Table 3 are averages of the values measured in the wastewater treatment 10 times.

[0063]

[Table 3]

[Example 3] Waste water from a dairy beverage manufacturing plant was treated, and the waste water was purified in the same manner as in Example 1.
The amount of waste water was 10 m ³ / day. The residence time of the wastewater in the microbial reactor was 25 minutes, and the number of times the wastewater was transferred between the first reaction tank and the second reaction tank was 2.6 times / minute. The results are shown in Table 4. The measured values in Table 4 are averages of the values measured in the wastewater treatment 10 times.

[0065]

[Table 4]

[Embodiment 4] As a treatment target of domestic wastewater,
Waste water was purified in the same manner as in Example 1. Waste water volume is 4m ³
/ Day. The residence time of wastewater in the microbial reactor is
The number of transfers of the waste water between the first reaction tank and the second reaction tank was 0.1 times / minute for 8 minutes. The results are shown in Table 5. The measured values in Table 5 are the averages of the values measured in the wastewater treatment 10 times.

[0067]

[Table 5]

[0068]

According to the microbial reaction apparatus of the present invention, it is possible to supply sufficient nutrients and oxygen to the microorganisms,
Organic substances, nitrogen, phosphorus, pathogenic bacteria, malodorous substances, etc. can be removed from wastewater discharged from livestock houses, factories, households, etc., and purified water that is significantly below the emission standard values can be obtained. Specifically, from high concentration (20,000mg / L) to low concentration (25mg / L)
Wastewater having a BOD value of 0 mg / L) can be purified to a BOD value of 10 mg / L or less, and nitrogen and phosphorus can be removed by 90% or more. In addition, the excess sludge derived from the bacterial cells of the propagated microorganisms is effective as a useful soil microorganism as a pesticide-free cultivation or soil amendment agent for a soiled land, and does not cause problems such as illegal dumping in the ocean. In addition, purified water contains substances useful for animal and plant diseases that are released by apoptosis of mother cells when Bacillus microorganisms sporulate.Therefore, use this useful substance after separating it from purified water. You can also

According to the microbial reaction device of the present invention,
Since sufficient nutrients and oxygen can be supplied to the microorganisms, aerobic microorganisms can be cultivated at a high growth rate to efficiently produce medicines such as compost (compost) and antibiotics. Further, the microbial reaction device of the present invention has a simple structure, is easy to manufacture and maintain, and is low in cost. In particular, since it does not have a drive part such as a motor or a speed reducer, it does not generate noise and does not break down during operation. Further, in the conventional reticulated rotary disk system, from the viewpoint of the cost of power consumption and structural strength, the diameter of the disk could not be 3 m or more, but in the microbial reactor of the present invention, power is used. Therefore, the efficiency and stability of the treatment can be improved by increasing the height to 10 m or more, or by providing a large number of reaction tanks inside in the form of a honeycomb or the like. Furthermore, since the material and shape of the microbial carrier in the microbial reaction device can be freely selected, a wide variety of microorganisms can be handled, and various wastewaters, nutrient solutions, etc. can be dealt with.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example (first embodiment) of a microbial reaction device of the present invention.

FIG. 2 is a sectional view taken along the line AA in FIG.

FIG. 3 is a cross-sectional view showing another example (second embodiment) of the microbial reaction device of the present invention.

FIG. 4 is a sectional view taken along the line BB in FIG.

5 is a schematic view showing an example of a wastewater treatment system including the microbial reaction device shown in FIG.

FIG. 6 is a schematic diagram showing an example of a useful substance production system including the microbial reaction device shown in FIG.

[Explanation of symbols]

1,31 Microbial reactor 2,32 First reaction tank 3,33 Second reaction tank 4 Communication passage 5,15 Microorganism carrier 6 Inflow port 7,16 Exhaust regulating valve 8,18,57,59,60, 61,84,88 Aeration device (oxygen-containing gas supply means) 9,19 Liquid level sensor 10,20 Radiating plate 11,44 Inflow pipe 12, 64, 65, 66, 70, 71, 82, 91, 9
2,97 Inflow adjustment valve 13, 17, 83, 87 Inflow air adjustment valve 14 Drain port 21, 45 Drain pipe 22 Outflow adjustment valve 34 First communication means 35 Second communication means 36, 40 Water intake portion 37, 41 Water spray Parts 38, 42, 68, 95 Pipe lines 39, 43 Water sprinkling adjustment valve 51 Storage tank 52 First aeration tank 53 Second aeration tank 54 Denitrification / sporification tank 55 Precipitation tank 56 Filter 58, 63, 69, 85, 90,96 Flow rate adjusting device 62,89 Returning pipe 67,94 Dehydrating device 81 Nutrient solution storage tank 86 Sporulation promoting device 93 Spore separating device

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C12N 1/20 C12N 1/20 F // (C12M 1/00 C12R 1:07 C12R 1:07) (C12N 1/20 C12R 1:07) (72) Inventor, Lin Feng Feng, People's Republic of China 155-101 F-term, Kosanmura, Yangpu-gu, Shanghai, China (reference) 4B029 AA03 AA05 BB02 CC02 CC10 DB15 DC07 DG06 4B065 AA15X BB40 BC06 BC41 BC50 CA49 CA55 4D003 AA01 AB02 BA01 BA04 DA08 DA29 DA30 EA03 EA14 EA16 FA01 4H061 AA03 CC47 CC51 GG49 GG67 GG70

Claims (6)

[Claims] 1. A first reaction tank and a second reaction tank for treating a liquid containing a microbial nutrient source with microorganisms, and the tank spaces of the first reaction tank and the second reaction tank are communicated with each other. A microbial reactor provided with a communicating means to obtain, in the inner space of each of the first reaction tank and the second reaction tank, a microbial carrier capable of supporting microorganisms, and oxygen in the tank. Oxygen supply means for releasing the contained gas is arranged, each of the first reaction tank and the second reaction tank, for exhausting the oxygen-containing gas in the tank, the microorganism A microbial reaction device having an exhaust control valve provided above a carrier. 2. The communication means is a communication passage that connects an opening formed in the first reaction tank and an opening formed in the second reaction tank, Each of the opening of the reaction tank and the opening of the second reaction tank, the lower end of the microorganism carrier in the first reaction tank, the lower end of the microorganism carrier in the second reaction tank The microbial reaction device according to claim 1, wherein the microbial reaction device is provided so as to be located below both of them. 3. The first communication means for supplying the microbial nutrient source-containing liquid in the first reaction tank to the second reaction tank, and the communication means in the second reaction tank. A second communication means for supplying a microbial nutrient source-containing liquid to the first reaction tank, wherein the first communication means is arranged below the microbial carrier in the first reaction tank. A water intake section provided, and a water sprinkling section disposed above the microorganism carrier in the second reaction tank,
It is provided with a pipe line that connects these water intake section and water sprinkling section, the second communication means, the water intake section disposed below the microorganism carrier in the second reaction tank, and A sprinkling section arranged above the microorganism carrier in the first reaction tank,
The microbial reaction apparatus according to claim 1, comprising a pipe line that connects the water intake section and the water sprinkling section. 4. The first reaction tank and the second reaction tank each detect that the liquid level of the microbial nutrient source-containing liquid reaches a predetermined height above the microbial carrier. The microbial reaction device according to any one of claims 1 to 3, further comprising a liquid level sensor for performing the operation. 5. A method for treating a microbial nutrient source-containing liquid using a first reaction tank and a second reaction vessel for treating a microbial nutrient source-containing liquid with a microorganism, comprising: After arranging a microorganism carrier in each tank space of the second reaction tank, and supporting a predetermined microorganism on the microorganism carrier, the first reaction tank and the second reaction tank By alternately moving the microbial nutrient source-containing liquid, the microbial carrier in the first reaction tank is immersed in the microbial nutrient source-containing liquid, and the second reaction The microbial carrier in the tank is aerated in an oxygen-containing gas, the microbial carrier in the first reaction tank is aerated in an oxygen-containing gas, and the second reaction tank The above-mentioned microbial carrier in the state of being immersed in the above-mentioned microbial nutrient source-containing liquid. DOO is processing method microbial nutrient-containing solution, characterized by being configured to alternately appear. 6. The method for treating a microbial nutrient-containing solution according to claim 5, wherein a bacterium of the genus Bacillus is used as the microorganism.