JP2010155184A - Support feeding type biological reaction apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a support feeding type reaction apparatus capable of avoiding the clogging of a support separation panel for separating the support from a biological reaction tank mixed solution and efficiently operating a first settling tank when water flows in a waste water treatment plant in raining or in a quantity equal to or above a designed value in a treatment plant in which a support feeding type activated sludge method is applied. <P>SOLUTION: The support feeding type biological reaction apparatus comprises a biological reactor 1 for carrying out the biological treatment using a support S, a transporting pipe 3 which is provided with a flow-in port and supplies flow-in water to the biological reactor 1, a support separation plate 2 which is arranged in the biological reactor 1 and separates the support S from the biological reactor mixed solution and a downstream side flow-in port 4 which is arranged in the transporting pipe 3 and opened on the downstream side of the support separation plate 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a carrier separation plate that separates a carrier and a biological reaction tank mixed solution in a treatment plant such as sewage to which the carrier input activated sludge method is applied, in rainy weather or when an amount of water greater than the design value flows into the treatment plant. The present invention relates to a carrier input type bioreactor capable of avoiding clogging.

2. Description of the Related Art As a sewage treatment apparatus to which a conventional activated sludge treatment method is applied, a carrier input type bioreaction apparatus that performs a sewage treatment by introducing a carrier to which microorganisms are attached into a biological reaction tank is known (see, for example, Patent Document 1). ).
However, for example, when the biological treatment is performed by simply putting the carrier into the existing biological reaction tank, the carrier flows out of the biological reaction tank together with the biological reaction tank mixed solution, and the carrier is fed to the pump of the sewage treatment system. When sucked, there was a problem such as failure of the pump.

  Therefore, conventionally, as a countermeasure for preventing the carrier from flowing out, a carrier input type bioreaction apparatus has been developed in which a carrier separation plate is installed in the biological reaction tank so that the carrier stays in the biological reaction tank.

  FIG. 25 is a perspective view showing a conceptual configuration of a conventional carrier-feeding biological reaction apparatus. This carrier input type bioreactor performs biological treatment by introducing a carrier S into a bioreactor 1 into which a supernatant liquid after solid-liquid separation flows from a first sedimentation basin (hereinafter referred to as “primary sedimentation”). The mixed liquid and the carrier S are separated by the carrier separation plate 2 installed in the biological reaction tank 1, and the separation liquid that has passed through the carrier separation plate 2 is discharged out of the system through the final sedimentation basin. The carrier separation plate 2 allows the carrier S to remain in the biological reaction tank 1.

In a sewage treatment plant in which such a carrier input type bioreactor is installed, sewage exceeding the designed amount of water is basically prevented from flowing. Sewage exceeding the design water volume is released into rivers after disinfection by performing solid-liquid separation by primary sedimentation, which is a simple treatment, without decomposing organic matter by biological treatment. In the initial settling, solid-liquid separation treatment must be performed in excess of the design water volume, so we are trying to keep the sludge from accumulating in the initial settling. .
Even if simple treatment by solid-liquid separation in the first sedimentation is not possible, if sewage more than the design water flows into the biological reaction tank,
a) Increase the amount of cleaning aeration on the upstream side of the carrier separation plate 2.
b) Increase the return amount of the carrier S.
c) Aeration in the biological reaction tank 1 is stopped and the carrier S is allowed to settle.
It corresponds by such.

JP 58-67395 A (Example and FIG. 1)

The problems of the conventional carrier input type bioreactor provided with the carrier separation plate 2 shown in FIG. 25 are listed below.
(1) When the amount of inflow water in the treatment plant increases abruptly and sewage more than the designed amount of water flows into the treatment plant, the flow rate in the biological reaction tank 1 increases rapidly, so that the carrier S becomes the carrier separation plate 2. There was a problem that the carrier separation plate 2 was blocked in the vicinity and closed.
(2) Even if the carrier separation plate is blocked by the carrier S, if it is left as it is without taking any countermeasure, the water level of the biological reaction tank 1 rises and the biological reaction tank mixture overflows. Since the biological reaction tank mixture contains sludge and sewage mainly composed of microorganisms, it overflows from the biological reaction tank 1 and is not only very dirty, but also contains various germs and pathogenic microorganisms contained in the excrement of the sick. There was also a high possibility of being hygienic, and there were also problems in hygiene.
(3) In addition, when the inflow water of the treatment plant increases, measures such as increasing the cleaning aeration of the carrier separation plate 2 and the carrier return amount or stopping the aeration in the biological reaction tank 1 have been taken. However, there are many cases where the timing of starting treatment is artificially judged, and it is difficult to judge unless it is a skilled engineer, and there is a problem that the treatment is delayed. In general, when the rainfall increases, field workers cannot immediately determine or determine the amount of water to be removed (distributed), and there is a problem that the response is delayed and the biological treatment in the biological reaction tank 1 is adversely affected.
(4) In a sewage treatment plant that is premised on simple treatment, it was necessary to increase the number of initial sludge extractions and the amount of extraction in order to keep the initial sludge from accumulating. As a result, a large amount of low-concentration primary sedimentation sludge is extracted, and the concentration efficiency of primary sedimentation declines, the amount of sludge treatment increases significantly, sludge disposal costs increase, and work becomes complicated. there were.
(5) When sewage more than the design water flows in at once, the residence time of the biological reaction tank 1 becomes extremely short, and the biological reaction tank 1 flows out before the time required for biological treatment cannot be secured. was there. If the residence time is too short, the organic matter treatment will not be sufficient, and the carrier flocs necessary for the treatment and the floating floc of the sludge will not grow normally, will fall apart, become insufficiently oxidized and become unable to separate solid and liquid, and then There was a problem that the biological treatment of the aggravated.
(6) Furthermore, in the treatment plant to which advanced treatment is applied, the sludge retention time of the first settling sludge is shortened, so that the BOD of the biological reaction tank inflow water is lowered and the BOD necessary for advanced treatment cannot be secured. It was.

  The present invention has been made to solve the above-described problems. In a treatment plant to which the carrier-added activated sludge method is applied, the carrier and the living organism can be used in the case of rain or when the amount of water exceeding the design value flows into the treatment plant. It is an object of the present invention to provide a carrier input type bioreactor capable of avoiding clogging of a carrier separation plate for separating a reaction tank mixed liquid and capable of efficiently performing initial sedimentation.

The carrier input type bioreaction apparatus according to the present invention comprises a bioreaction tank that performs biological treatment using a support, an inflow port, a transfer pipe that supplies inflow water to the bioreaction tank, and a bioreaction tank. And a carrier separation plate that separates the carrier from the biological reaction tank mixture, and a downstream inlet that is disposed in the transfer pipe and opens downstream of the carrier separation plate.

  The transfer pipe of the carrier input type bioreactor according to the present invention is provided with a plurality of inflow ports.

  The biological reaction tank of the carrier input type bioreactor according to the present invention is provided with a plurality of carrier separation plates.

The carrier input type bioreactor according to the present invention is characterized in that a screen for removing contaminants from the inflow water and / or the return sludge supplied to the bioreactor is provided.

According to the carrier input type biological reaction apparatus of the present invention, the following many effects can be obtained.
(1) Since the amount of water passing through the carrier separation plate is always less than or equal to the design value by flowing sewage (inflow water) from the downstream inlet of the carrier separation plate, there is a risk that the carrier separation plate will be clogged. Therefore, even when a large amount of influent water flows in, a stable biological treatment as usual can be maintained.
(2) Even if a large amount of inflow water exceeding the design water amount flows in, the carrier separation plate will not be clogged. Therefore, the biological reaction tank mixture overflows without taking measures, and it is caused by various germs and pathogenic microorganisms. There is no worry of contamination.
(3) If a downstream inlet is installed on the downstream side of the carrier separation plate and the water distribution is set in advance using a gate, a skilled engineer who can judge independently even if there is a sudden heavy rainfall Even in the absence, inflowing water can be distributed accurately without delaying judgment and countermeasures because human judgment is unnecessary. Even if the manager of the treatment plant is unaware of the rain or does not take any action, the necessary amount of inflow water can be distributed.
(4) Even if inflow water more than the design water volume flows from the downstream inlet to the downstream side of the carrier separation plate, the inflow water flowing in from the upstream of the biological reaction tank is less than the design water volume, which is necessary for biological treatment. The residence time in the biological reaction tank can be maintained. Since a sufficient residence time can be maintained on the upstream side of the carrier separation plate, the biological reaction tank carrier and floating activated sludge organisms can be maintained in good condition. Since the suspended activated sludge that has passed through the carrier separation plate maintains a good state, organic matter (SS / BOD) can be adsorbed even if it comes into contact with a large amount of influent from the downstream inlet. The suspended sludge can be separated into solid and liquid in the final sedimentation basin into clear treated water and biological sludge.
(5) A downstream inlet is installed on the downstream side of the carrier separation plate, and even if excess inflow water exceeding the design value flows in, the entire amount of inflow water can be biologically processed more than simple treatment. It is not necessary to take measures such as driving that does not accumulate energy. The amount of extracted sludge does not increase, and the sludge disposal cost does not increase.
(6) In the treatment plant where advanced treatment is applied, it is possible to flow directly from the downstream inlet without passing through the primary sedimentation so as to maintain the residence time of the primary sedimentation sludge. Necessary BOD can be secured. For this reason, it is advantageous in treatment plants to which advanced treatment such as nitrogen / phosphorus removal is applied.
(7) Many of the current sewage treatment plants are often connected to the inflow water channel to the end of the biological reaction tank. . In addition, if there is a step inflow gate that is not currently used, it can be modified by simply moving it.
(8) The emergency inlet (downstream inlet) may be a weir or a gate. If it is a weir, it is not necessary to make an artificial judgment, and when excess inflow water exceeding the design value flows in, it can automatically overflow the weir and flow into the biological reaction tank. Even if it is an automatic gate of the type that can be automatically controlled by the water level and the amount of water, once it is set, it is not necessary to make an artificial judgment, and stable processing can be performed at all times.
(9) If a front gate (inflow adjuster) is installed in the biological reaction tank inflow channel (transfer pipe), the water channel (transfer pipe) from the front gate (inflow adjuster) to the downstream inlet is always sewage (inflow water). ) Does not need to be stored, and therefore, the sewage water that has been spoiled does not stay in the water channel (transfer pipe).
(10) If stirring equipment and aeration equipment are installed on the downstream side of the carrier separation plate in the biological reaction tank, stirring of sewage and activated sludge is promoted, and activated sludge does not settle and accumulate on the downstream side of the carrier separation plate. . Moreover, even if an agitation facility or an aeration facility is installed on the upstream side of the carrier separation plate, the carrier separation plate surface can be prevented from being blocked.

Embodiment 1 FIG.
FIG. 1 is a perspective view showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 1 of the present invention. The same parts as those in FIG.
The carrier input type bioreaction apparatus of the first embodiment includes a bioreaction tank 1 that performs biological treatment of influent water using a carrier S to which microorganisms are attached, and a bioreaction tank disposed in the bioreaction tank 1. 1, a carrier separation plate 2 that captures and separates the carrier from the mixed liquid in 1, a transfer pipe 3 that transfers inflow water, and an inflow water that is provided in the transfer pipe 3 and is located downstream of the carrier separation plate 2. It has the basic structure which consists of the downstream inflow port 4 which supplies the to the biological reaction tank 1. The transfer pipe 3 is not limited to a tubular shape as long as it can transfer the inflowing water such as a pipe, a water channel, and a groove for transferring the inflowing water to the biological reaction tank 1.

  In the first embodiment, the biological reaction tank 1 has an inlet (not shown) to which inflow water is supplied from primary sedimentation on the upstream side, and the separation liquid that has passed through the carrier separation plate 2 is subjected to final sedimentation. It is structured to drain into the pond. The transfer pipe 3 is installed at the upper part of the side surface of the biological reaction tank 1, and the downstream inlet 4 thereof opens at a position higher than the reference water level of the biological reaction tank 1 to remove excess influent water from the biological reaction tank 1. It is made to flow in the downstream of the carrier separation plate 2 inside. The inflow water to the biological reaction tank 1 is often the first settling effluent, but the inflow from the pump water, the inflow from the inflow water storage tank, the direct inflow, etc. When reaction tanks such as other treatment equipment or treatment methods are installed in the previous stage, the initial sedimentation is installed, but the amount of inflow water has increased significantly, so it may flow in without passing through the primary sedimentation. Not limited to inflow water from sinking.

  According to the carrier input type biological reaction apparatus of the first embodiment configured as described above, when the amount of water (excess inflow water) exceeding the design value is generated in the treatment field, the excess inflow water is transferred to the transfer pipe. 3 flows into the final sedimentation basin after flowing into the downstream side of the carrier separation plate 2 in the biological reaction tank 1 from the downstream inlet 4 provided on the downstream side of the carrier separation plate 2. Since FIG. 1 is a diagram showing a conceptual configuration, when a plurality of biological reaction tanks 1 are installed, the biological reaction tank 1 of FIG. 1 shows the final tank of the carrier-added biological reaction tank, It is not limited to the final tank, and there may be a separate treatment system in the subsequent stage, and the outflow destination from the biological reaction tank 1 is not limited to the final sedimentation tank. As described above, the excess inflow water can be distributed and flowed to the downstream side of the carrier separation plate 2 in the biological reaction tank 1 by the transfer pipe 3, so that the amount of inflow water (design water amount) of the biological reaction tank 1 to the carrier separation plate 2 is more than. Therefore, there is no effect that the carrier S is concentrated on the upstream side in the vicinity of the carrier separation plate 2 and the blockage of the carrier separation plate 2 by the carrier S can be avoided.

Embodiment 2. FIG.
FIG. 2 is a perspective view showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 2 of the present invention.
In the second embodiment, the upstream side of the transfer pipe 3 in the first embodiment is connected to the initial settling, and the inflow water from the initial settling into the transfer pipe 3 flows into the upstream side in the biological reaction tank 1. 5, and an inflow adjuster (gate) 6 is provided between the inlet 5 and the downstream inlet 4 in the transfer pipe 3, and this point is different from the first embodiment.

In this Embodiment 2, the said inflow regulator 6 consists of a gate (not shown) of a dam structure, and when the inflow water from primary sedimentation is the excess inflow water exceeding design amount water quantity, the excess inflow water Flows over the gate to the downstream inlet 4 and flows from the downstream inlet 4 to the downstream side of the carrier separation plate 2 in the biological reaction tank 1.
That is, the carrier input type bioreactor according to the second embodiment has an inlet 5, an inflow adjuster 6, and a downstream inlet from the upstream side to the transfer pipe 3 installed along the flow-down direction of the biological reaction tank 1. In normal times, the inflow water from the initial sink flows into the upstream side of the biological reaction tank 1 from the inflow port 5, and the inflow water is excessive inflow water exceeding the design value water amount due to rainfall increase etc. At that time, the excess influent water flows from the downstream inlet 4 to the downstream side of the biological reaction tank 1 beyond the gate of the inflow regulator 6. The inflow adjuster 6 may be an openable / closable gate installed on the downstream side of the inlet 5 of the transfer pipe 3. In this case, the gate is normally closed to generate excessive inflow water. Open it sometimes.

  According to the carrier input type bioreaction apparatus of the second embodiment configured as described above, the inflow port 5 and the inflow adjuster 6 are provided in the transfer pipe 3 installed in the flow-down direction of the bioreaction tank 1, so that the normal time Inflow water flows into the biological reaction tank 1 from the inlet 5 upstream of the transfer pipe 3. However, when excess inflow water flows in, the excess inflow water passes through the gate of the inflow regulator 6 and flows downstream. Since it flows into the biological reaction tank 1 from the inlet 4, the same effect as the first embodiment can be obtained.

  When the gate is installed as the inflow adjuster 6 on the downstream side of the inlet 5 of the transfer pipe 3 so that the gate can be opened and closed, the inflow water from the initial settling can be supplied by closing the gate in normal times. Since the inflow water does not flow downstream from the gate, when there is no excess inflow water, sewage stays downstream from the gate in the transfer pipe 3. It is possible to prevent the rot due to sewage stagnation in the transfer pipe 3.

Embodiment 3 FIG.
FIG. 3 is a plan view showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 3 of the present invention, and FIG. 4 (A) shows a gate installation portion of the inflow adjuster 6 in FIG. 4B is a cross-sectional view showing the gate closed state of FIG. 4A, FIG. 4C is a cross-sectional view showing the half-open state, and the same parts as those in FIG. I will explain.
In the third embodiment, an electric gate (automatic gate) 6A is applied as the inflow adjuster 6 in the second embodiment, and this electric gate 6A is installed on the downstream side in the vicinity of the inlet 5 of the transfer pipe 3. is there. The electric gate 6A is normally closed (see FIG. 4 (B)), and is opened (see FIG. 4 (A) or (C)) in an emergency when excessive inflow water due to rainfall increase or the like flows.

In this Embodiment 3, by opening the electric gate 6A in the case of an emergency, excess influent water flows into the biological reaction tank 1 from the downstream inlet 4 of the transfer pipe 3, and is mixed with the biological reaction tank mixture. In contact, the organic matter is adsorbed and removed by the microorganisms.
As described above, in the third embodiment, since the electric gate 6A is installed as an inflow adjusting tool, the electric gate 6A can be instantaneously operated when the amount of inflow water suddenly increases. Since remote control is possible, countermeasures are not delayed and can be handled safely even in rainy weather.

Embodiment 4 FIG.
FIG. 5 is a cross-sectional plan view showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 4 of the present invention, FIG. 6 (A) is a sectional view showing a manual gate installation portion in FIG. FIG. 6B is a cross-sectional view illustrating the gate closed state of FIG.
In the fourth embodiment, a manual gate 6B is applied as the inflow adjuster 6, and this manual gate 6B is installed at the downstream inlet 4 of the transfer pipe 3.
Therefore, even in the case of the fourth embodiment, the manual gate 6B (see FIG. 6B) is normally closed and the manual gate 6B (see FIG. 6A) is opened in an emergency, so Even if the inflowing water is mixed, since the inflowing organic substances are removed by being adsorbed by the microorganisms without clogging the carrier separation plate 2, there is an effect that a stable activated sludge treatment can be continued. Further, by opening the manual gate 6B to a preset height position (see FIG. 6C), when the inflow water suddenly increases and exceeds the set height position, the downstream side inlet 4 Can flow automatically. Further, the increase in the amount of inflow water is reduced and the amount of inflow water is decreased. If the amount is less than the design water amount, the water level of the transfer pipe 3 is also lowered, and the inflow from the downstream inflow port 4 can be stopped naturally. Since these are performed automatically, there is no human error or delay in response, and there is an effect that can be surely performed.

Embodiment 5 FIG.
FIG. 7 is a perspective view showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 5 of the present invention.
In the fifth embodiment, a fixed overflow weir 6C as an inflow adjusting tool is installed at the bottom of the transfer pipe 3 on the downstream side in the vicinity of the inlet 5 of the transfer pipe 3, and the other structure is the same as that of the embodiment described above. This is the same as the first to fourth embodiments.

In the carrier input type bioreactor according to the fifth embodiment, inflow water flows into the bioreaction tank 1 from the inflow port 5 during normal operation. The influent water flows into the biological reaction tank 1 from the downstream inlet 4 of the transfer pipe 3 beyond the fixed overflow weir 6C. The inflowing excess influent water contacts and mixes with the biological reaction tank 1 mixture, and the inflowing organic matter is adsorbed by the organism in the biological reaction tank mixture and is subjected to solid-liquid separation treatment in the final sedimentation basin. Therefore, even in the case of the fifth embodiment, even if excessive influent water is mixed in, the inflowing organic matter is removed by being adsorbed by the microorganisms without clogging the carrier separation plate 2, and thus stable activated sludge treatment. Has the effect of being able to continue.
Excess inflow water exceeding the fixed overflow weir 6C flows down to the downstream side according to the descending gradient of the transfer pipe 3 that is gently taken toward the downstream side, and flows into the biological reaction tank 1 from the downstream inlet 4. . The descending gradient of the transfer pipe 3 is usually designed so that the biological reaction tank mixed solution flows down to the downstream side in the processing facility, and is not limited to the fifth embodiment.

Embodiment 6 FIG.
FIG. 8 is a perspective view showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 6 of the present invention, and FIG. 9 is a schematic plan view of FIG.
In the sixth embodiment, the biological reaction tank 1 is formed in a substantially U-shaped plane as shown in FIG. 9 so that the inlet 5 provided on the upstream side of the biological reaction tank 1 and the downstream inlet 4 are formed. The transfer tube 3 of the biological reaction tank 1 is installed at the opposite position, and a plug-type plate overflow weir 6D is installed at the downstream inlet 4 of the transfer tube 3 so as to be opened and closed as an inflow adjuster. Is.
In the sixth embodiment, since the biological reaction tank 1 is formed in a U shape because of the site, normally, the upstream side and the downstream side are installed apart from each other, but the inlet pipe 5 and the downstream side are placed between the transfer pipes 3. The side inlet 4 is installed at the opposite position. Since the inflow port 5 and the downstream inflow port 4 are installed at positions close to the transfer pipe 3, the downstream inflow port 4 is installed higher than the height position of the inflow port 5. Moreover, although the biological reaction tank 1 is described in U shape in FIG. 9, the upstream side and the downstream side of the two biological reaction tanks using the common transfer pipe 3 may be installed adjacent to each other.

  According to the sixth embodiment configured as described above, the position of the plug-type plate overflow weir 6D can be raised and lowered, so that the plate overflow overflow weir can be adjusted according to the amount of water to be overflowed. The height of 6D can be adjusted, and by adjusting the height in advance, it is possible to handle the carrier separation plate 2 without clogging even when excessive inflow water exceeding the design amount of water suddenly flows in. effective. Furthermore, since a large amount of excess influent water can be treated without bothering people and doing nothing, there is no fear of delays in response or human error, and there is an excellent effect of ensuring safety and ensuring safety. Further, by lowering the plate overflow weir 6D to the bottom, inflowing water flows in from the inlet 5 during normal operation, but when the inflowing water becomes excessive, the water level in the transfer pipe 3 is reduced. When the plate overflows and exceeds the plate overflow weir 6D, excess inflow water flows from the downstream inlet 4. The plug-type plate overflow dam 6D may be any movable weir that can be adjusted in height. In this case, the same effect can be expected. An inflow regulator 6 may be installed between the inlet 5 in the transfer pipe 3 and the downstream inlet 4.

Embodiment 7 FIG.
FIG. 10 is a perspective view showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 7 of the present invention.
In the seventh embodiment, a drop-type plate overflow dam 6E is installed at the downstream inlet 4 of the transfer pipe 3 in the sixth embodiment. The drop-type plate overflow dam 6E has a predetermined height. Therefore, even if a large amount of inflow water suddenly flows in, stable operation is possible without any problem. Further, even if a large amount of inflow water flows from the downstream inlet 4 and flows backward from the carrier separation plate 2 to the biological reaction tank 1, in this case, the size of the falling overflow weir 6E and the inlet 5 is as follows. Since it is possible to select and determine as appropriate, even if a large amount of excess influent flows in, the water level in the biological reaction tank 1 does not rise above a certain level. Moreover, since the carrier separation plate 2 is installed up to the upper part of the normal water level of the biological reaction tank 1, the carrier S does not flow over the carrier separation plate 2. Even if the water flow reversely flows through the biological reaction tank 1 due to the influence of excess influent water for a period of time, if the inflow of excess inflow water settles down, it is designed and constructed so that the influent water flows downstream in the biological reaction tank 1. , Can continue stable sewage treatment. The biological reaction tank 1 may have a U shape, and the shape is not limited to FIG.

Embodiment 8 FIG.
FIG. 11 is a perspective view showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 8 of the present invention.
In the eighth embodiment, a plurality (two in FIG. 11) of carrier separation plates 2A and 2B are installed in the biological reaction tank 1 apart from the upstream side and the downstream side, and the inlet 5 of the transfer pipe 3 and the downstream side A step inlet 7 is provided between the side inlet 4 and the step inlet 7 is opened to the upstream side of the upstream carrier separation plate 2 A in the biological reaction tank 1. Although one step inlet 7 is shown in FIG. 11, two or more step inlets 7 may be provided. When a plurality of step inlets 7 are provided, a carrier separation plate may be provided on the upstream side of the step inlet 7.

  According to the eighth embodiment, a plurality of carrier separation plates 2A and 2B are installed in the biological reaction tank 1, and the inlet 5 and the step inlet 7 of the transfer pipe 3 are arranged upstream of the carrier separation plate 2A in the biological reaction tank 1. By making it open to the side, there exists an effect that the activated sludge process in the biological reaction tank 1 can be performed efficiently and stably.

Embodiment 9 FIG.
FIG. 12 is a perspective view showing a conceptual configuration of a carrier input type bioreaction apparatus according to Embodiment 9 of the present invention. The same parts as those in FIG.
In the ninth embodiment, carrier separation facilities 8 and 9 are provided at the inlet 5 and the step inlet 7 of the transfer pipe 3 in the carrier-added biological reaction apparatus of the eighth embodiment, respectively.
These carrier separation facilities 8 and 9 may be made of a material capable of preventing the carrier S of the biological reaction tank 1 from flowing out to the transfer pipe 3, for example, a punching metal type, a screen type, a mesh type or a lattice type. As long as it can prevent the carrier S from flowing out, it is sufficient.

  According to the ninth embodiment, by providing the carrier separation facilities 8 and 9 at the inlet 5 and the step inlet 7, the water level of the biological reaction tank 1 rises when excess influent water is mixed. Thus, it is possible to prevent the carrier S in the biological reaction tank 1 from flowing out to the transfer pipe. A plurality of step inlets 7 may be provided, and since the carrier separation facility 9 is installed at the step inlet 7, it is possible to prevent the carrier S of the biological reaction tank 1 from flowing backward and flowing out to the transfer pipe 3. Further, the carrier separation plates 2A and 2B may use different shapes and members for each step inlet 7.

Embodiment 10 FIG.
FIG. 13 is a perspective view showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 10 of the present invention.
In the tenth embodiment, a carrier return pump 10 is installed in the biological reaction tank 1 of the carrier input type bioreactor according to the first embodiment.
The carrier return pump 10 supplies a carrier return pipe 11 that returns the carrier S in the biological reaction tank 1 from the downstream side to the upstream side of the biological reaction tank 1, and supplies compressed air from the downstream side into the carrier return pipe 11. It consists of an air supply pipe (compressed air supply means) 12. The carrier return pipe 11 includes a suction pipe part 11a that hangs down in the sewage in the vicinity of the upstream side of the carrier separation plate 2 in the biological reaction tank 1, and an upper end of the suction pipe part 11a. It comprises a discharge pipe part 11b extending above the water surface and upstream in the biological reaction tank 1, so that the compressed air from the air supply pipe 12 is supplied from the lower part of the suction pipe part 11a. It has become. The air supply pipe 12 is connected to a compressed air supply source.

  The carrier return pump 10 configured in this manner generates bubbles in the liquid mixture inside the carrier return pipe 11 by supplying compressed air to the suction pipe portion 11a of the carrier return pipe 11 via the air supply pipe 12. Let As a result, the apparent specific gravity of the mixed liquid inside the carrier return pipe 11 is smaller than that of the external biological reaction tank mixed liquid (the mixed liquid inside the biological reaction tank 1), and the biological reaction tank mixed liquid is equivalent to this specific gravity difference. The carrier S is sucked into the carrier return tube 11. The mixed liquid sucked into the carrier return pipe 11 and the carrier S are mixed with bubbles inside the carrier return pipe 11 and pushed up inside the suction pipe portion 11a, and then flow through the discharge pipe portion 11b to flow into the discharge pipe. It is discharged and returned to the upstream side of the biological reaction tank 1 from the tip outlet of the part 11b.

  According to the tenth embodiment described above, in the biological reaction tank 1, when excess inflow water of a design value or more flows in, the excess inflow water is caused to flow into the bioreaction tank 1 from the downstream inlet 4. Since only the inflow water below the design water amount flows into the biological reaction tank 1 on the upstream side of the carrier separation plate 2, the flow of the carrier S is not affected. Since the carrier S flowing down to the vicinity of the downstream carrier separation plate 2 in the biological reaction tank 1 upstream of the carrier separation plate 2 can be returned to the upstream side of the biological reaction tank 1 by the carrier return pump 10. The density of the carrier in the biological reaction tank 1 can be made uniform, and when the inflow water in the biological reaction tank 1 increases, the carrier separation plate 2 is blocked by increasing the amount of returned carrier. Can be prevented. Further, in the carrier return pump 10, the discharge pipe portion 11b of the carrier return pipe 11 is held above the water surface of the biological reaction tank 1, so that it is used even if the biological reaction tank 1 is divided into a plurality of tanks. Can do.

Embodiment 11 FIG.
FIG. 14 is a perspective view showing a conceptual configuration of a carrier input type biological reaction apparatus according to Embodiment 11 of the present invention. The same reference numerals are given to the same and corresponding parts as in FIG.
In the eleventh embodiment, the entire carrier return pipe 11 of the carrier return pump 10 according to the tenth embodiment is installed in a mixed solution inside the biological reaction tank 1. In this case, the carrier return pipe 11 is installed with the discharge pipe section 11b facing upward and the suction pipe section 11a along the bottom of the biological reaction tank 1, and an air supply pipe 12 is connected to the discharge pipe section 11b. It has a structure.

The carrier return pump 10 configured as described above flows down to the vicinity of the carrier separation plate 2 by supplying compressed air to the discharge pipe portion 11b via the air supply pipe 12 as in the case of the tenth embodiment. Since the carrier S thus returned can be returned to the upstream side of the biological reaction tank 1 by the carrier return pump 10, the carrier density in the biological reaction tank 1 can be made uniform and the inflow into the biological reaction tank 1 can be achieved. When the amount of water increases, the same effect as that of the tenth embodiment can be obtained in which the carrier separation plate 2 can be prevented from being blocked by increasing the carrier return amount.
In addition, since the entire carrier return pump 10 is installed in the mixed liquid inside the biological reaction tank 1, there is an effect that less energy is required for transferring the biological reaction tank mixed liquid containing the carrier S. is there.
The carrier return tube 11 of the carrier return pump 10 may have any shape that can return the biological mixture containing the carrier, and the shape is not specified. Similarly to the tenth embodiment, when excess inflow water of a design value or more flows in, the excess inflow water flows into the biological reaction tank 1 from the downstream inflow port 4. Since only the inflow water below the design water amount flows into the reaction tank 1, the flow of the carrier S is not affected.

Embodiment 12 FIG.
FIG. 15 is a perspective view showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 12 of the present invention.
In the twelfth embodiment, the contaminant removal facilities (screens) 13 and 14 for removing contaminants contained in the inflowing water are provided at the inlet 5 and the downstream inlet 4 of the transfer pipe 3 respectively. The sludge return pipe 15 connected to the upstream side of the biological reaction tank 1 is also provided with a contaminant removal facility (screen) 16 for removing contaminants contained in the return sludge.

  Thus, by providing the contaminant removal equipments 13, 14, 16 in the inlet 5, the downstream inlet 4, and the sludge return pipe 15 of the transfer pipe 3, the opening ratio of the carrier separation plate 2 is low, This is effective when there is a high possibility that the contaminants contained in the inflowing water and the returned sludge enter the biological reaction tank 1 and the carrier separation plate 2 is clogged.

  The carrier separation plate 2 having a low aperture ratio includes a screen type. When a small carrier S is employed, a screen type may be employed because the mesh of the carrier separation plate 2 needs to be reduced in order to capture the small carrier S. Since the carrier S is small, the screen-type carrier separation plate 2 for capturing the carrier 2 has a small mesh opening, and if the biological reaction tank 1 contains impurities contained in the inflowing water, fallen leaves or dust falling from the sky. The screen type carrier separating plate 2 is immediately closed. In that case, in order to prevent the screen-type carrier separation plate 2 from being blocked, it is necessary to remove impurities contained in the inflowing water and the return sludge. Further, since the screen type carrier separation plate 2 is easily blocked, even when it is installed in the biological reaction tank 1, a rectifying plate (not shown) is installed upstream of the carrier separation plate 2, or the carrier separation plate 2 is It is installed so as to be submerged in the water level of the biological reaction tank 1. There is no problem if the screens 13 and 14 of the contaminant removal equipment are installed at the inlet 5 and the downstream inlet 4 of the biological reaction tank 1 where the punching metal type carrier separation plate 2 is installed. Since the carrier separation plate 2 is difficult to close, a screen is unnecessary.

The punching metal type carrier separation plate 2 has the following characteristics.
(1) The carrier separating plate 2 has a function of separating a carrier-mixed liquid that allows the mixed liquid in the biological reaction tank 1 to pass through without passing through the carrier. The shape includes, for example, a punching metal type, a screen type, and an oblique lattice type. However, the shape is not specified as long as it can separate the carrier and the mixed liquid.
(2) When the carrier separation plate 2 is a punching metal type, the installation direction is such that the punching surface (= smooth surface) faces the upstream side of the biological reaction tank 1 as shown in FIG. (= Rough surface).
(3) If the rough surface is directed to the upstream side, the carrier is worn out and deteriorated, so that the carrier is consumed and the exchange frequency is increased, which not only hinders biological treatment but also increases the running cost.
(4) As shown in FIG. 17, the installation angle of the punching metal type carrier separation plate 2 is preferably 90 degrees or less (standing vertically from the bottom surface or inclined to the downstream side).
(5) A punching metal type carrier separation plate 2 having an aperture ratio of 30 to 65% may be applied.
(6) When the carrier shape was 12 mm × 12 mm × 15 mm, the punching metal type carrier separation plate 2 having an opening diameter of 2 to 15 mmφ was good. In the case of a small carrier having a carrier shape of φ3.0 mm × 5.0 mm, the screen type carrier separation plate 2 having an interval of 1.0 to 5.0 mm was preferably applied.
(7) Even when the hole of the punching metal type carrier separation plate 2 is 2 mmφ, the separation of the carrier and the biological reaction tank mixture was obtained, and the carrier separation property was not blocked by the carrier, but the carrier was somewhat Gathered nearby. A hole with a diameter of 15 mmφ was acceptable, but the hole with an diameter of 8 mmφ was the most smooth and good separation between the carrier and the biological reaction tank mixture.
(8) As shown in FIG. 18, an air diffuser and an agitator for preventing sludge sedimentation (deposition) and for eliminating the blockage of the carrier separator are also provided on the upstream and downstream sides of the carrier separator 2. Because aeration is performed, it contributes to elimination of water level difference (equalization of flow velocity).

The screen type carrier separator has the following characteristics.
(1) The screen-type carrier separation plate is installed at an angle. It is necessary to provide a current plate on the upstream surface of the screen type carrier separation plate.
(2) The screen type carrier separation plate may be installed so as to be submerged. Since the screen-type carrier separation plate has a small opening width, resistance is applied when the biological reaction tank mixture passes through the carrier separation plate, and if the carrier separation plate is not submerged, as shown in FIG. , A difference in water level (high on the upstream side and low on the downstream side) occurs due to the resistance of the prevention plate (rectifying plate). Therefore, a water head difference is generated before and after the carrier separation plate, the passing speed at the opening of the carrier separation plate and the flow velocity at the downstream side of the carrier separation plate are increased, and the resistance is increased and the blockage is likely to occur.

Embodiment 13 FIG.
FIG. 20 is a block diagram showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 13 of the present invention.
In the thirteenth embodiment, a plurality (two in FIG. 20) of biological reaction tanks 1A and 1B are arranged in parallel.
In the thirteenth embodiment, the first biological reaction tank 1A in which the punching metal type carrier separation plate 21 is installed vertically and the second organism in which the screen type carrier separation plate 22 is installed at a predetermined inclination angle. Reaction tank 1B is installed in parallel. Each of these biological reaction tanks 1A and 1B is also provided with a downstream inlet, and excess inflow water flows from these downstream inlets. In addition, the transfer pipe 3 through which the inflow water from the first sedimentation basin (first sedimentation) 23 flows into the biological reaction tanks 1A and 1B is connected to the branch pipe 3a of the biological reaction tank 1A system and the branch pipe 3b of the biological reaction tank 1B system. Branched. Similarly to this, the sludge return pipe 15 is also branched into the both systems.

  In the case of the screen-type carrier separation plate 22, if contaminants in the inflow water are mixed into the biological reaction tank mixed solution, the carrier separation plate 22 is blocked, and therefore the branch pipe 3 b of the biological reaction tank 1 </ b> B system in the transfer pipe 3 is contaminated. An object removal screen 25 is installed. In the case of the biological reaction tank 1A in which the punching metal type carrier separating plate 21 is installed, there is no concern that the carrier separating plate 21 will be blocked even if foreign substances flow in, so no screen for removing foreign substances is installed. Therefore, the sludge returned from the final sedimentation basin to the biological reaction tank 1B in which the screen type carrier separation plate 22 is installed is contaminated with contaminants that have flowed into the biological reaction tank 1A. A screen 26 for removing contaminants is also installed in the branch pipe returned to the biological reaction tank 1B. By providing the screens 25 and 26 for removing contaminants, it is possible to prevent contaminants from being mixed into the mixed liquid in the biological reaction tanks 1A and 1B.

The screens 25 and 26 for removing foreign substances have the following characteristics.
(1) The screen for removing foreign substances removes foreign substances and residue contained in the influent water or returned sludge.
(2) If a screen for removing contaminants is not installed, contaminants contained in the influent water and return sludge will enter the biological reaction tank, blocking the screen-type carrier separation plate, overflowing the liquid mixture, and the worst In this case, activated sludge treatment cannot be performed.
(3) As a screen for removing foreign substances, a fine screen or a screen having an interval of 0.5 to 5.0 mm is applied. However, the screen is not limited thereto as long as it can capture and remove foreign substances. When the biological reaction tank of the carrier input type and the biological reaction tank other than the carrier input type are installed and used in parallel, the biological reaction tank other than the carrier input type does not require a screen for removing contaminants. If there is no screen for removing contaminants in the carrier input type bioreactor, the carrier separation plate will be clogged and it will not be possible to treat activated sludge. Therefore, a screen for removing contaminants from the incoming water and / or return sludge is required. It becomes.
(4) When the processing facility is outdoors, if the screen is used as a carrier separation plate, the screen may be clogged due to mixing of dust (such as leaves or paper). For this reason, the biological reaction tank needs to be covered. On the other hand, the punching metal type carrier separation plate does not need to be specially covered because it does not become clogged with mixed dust.

  In this way, the biological reaction tank 1A in which the punching metal type carrier separation plate 21 is installed and the biological reaction tank 1B in which the screen type carrier separation plate 22 is installed are installed in parallel to perform processing. However, even if the size and shape of the carrier and the size and shape of the openings of the carrier separation plate are different, even if these methods are mixed, the downstream side inlet port on the downstream side of the carrier separation plate By installing, there is an effect that stable treatment can be ensured even if excessive inflow water exceeding the design value suddenly flows. In other words, even if a carrier separation plate is installed that has a small opening enough to be closed when impurities are mixed in, or a carrier separation plate is installed that has an opening ratio that does not block even if impurities are mixed, these methods are mixed. Even if multiple installations are installed, installing a downstream inlet on the downstream side makes it possible to prevent blockage of the carrier separation plate due to sudden inflow of excess inflow water above the design value. The effect is not affected by the size of the separation plate or the carrier, and there is an effect that it is possible to obtain the effect by using a carrier and using a member such as a carrier separation plate.

Embodiment 14 FIG.
FIG. 21 is a block diagram showing a conceptual configuration of a carrier input type biological reaction apparatus according to Embodiment 14 of the present invention.
In the thirteenth embodiment, the return sludge is returned from the sludge return pipe 15 of the system to the bioreactor 1B so that the contaminants of the return sludge are not mixed into the bioreactor 1B in which the screen type carrier separation plate 22 is installed. Although the screen 26 for removing contaminants is installed only in the branch pipe, in the fourteenth embodiment, the sludge return pipe 15 that does not allow the contaminants in the returned sludge to be mixed into both the biological reaction tanks 1A and 1B. A screen 26 for removing impurities is installed at the position.

Embodiment 15 FIG.
FIG. 22 (A) is a schematic configuration explanatory view showing a carrier input type bioreactor according to Embodiment 16 of the present invention, and FIG. 22 (B) is an explanatory view showing a downstream inlet in FIG. 22 (A). .
In the fifteenth embodiment, the transfer pipe 3 installed in parallel with the biological reaction tank 1 is composed of an inflow water path, and a tubular inflow water path is formed in the transfer pipe 3. The transfer pipe 3 has a structure in which an overflow weir 27 is provided in the vicinity of the downstream side of the inflow port 5.

  In the fifteenth embodiment, the downstream inlet 4 is not provided with a gate, a valve, an overflow weir, or the like for controlling the amount of inflow, so that excess inflow water passing through the transfer pipe 3 is the biological reaction tank 1. It flows in as it is. The amount of inflow water is adjusted by using the overflow weir shown in FIGS. 7, 8, and 10, the automatic gate shown in FIG. 3, the manual gate shown in FIG. In the case of the amount of water, the inflowing water is controlled to flow from the downstream inlet 4.

  In addition, since the transfer pipe 3 in the fifteenth embodiment has a tubular cross section as described above and the water channel is sealed, odors do not leak to the outside, and there is a concern that fallen leaves or dust may enter from the outside. Absent. In addition, accidents where people or people fall can be avoided. Since safety facilities are unnecessary or simpler than construction in the shape of the inflow channel, it is inexpensive.

Embodiment 16 FIG.
FIG. 23 is a perspective view showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 16 of the present invention.
The carrier input type bioreactor according to the sixteenth embodiment has a cleaning aeration facility 30 installed upstream of the carrier separation plate 2 in the biological reaction tank 1. The cleaning and aeration equipment 30 is for cleaning the carrier separation plate 2 by aeration so that the carrier S does not adhere to the carrier separation plate 2. In FIG. 23, the cleaning and aeration equipment 30 is described on the upstream side of the carrier separation plate 2. However, if the carrier separation plate 2 can be cleaned, it may be installed on the downstream side, the front side of the side, etc. is not. When the inflowing water increases, an effect of further strengthening the effect of preventing the clogging of the carrier separation plate 2 by allowing the excess inflowing water to flow in from the downstream inflow port 4 can be obtained by increasing the amount of aeration air. Further, when the inflowing water flows in by installing the cleaning aeration equipment 30, the biological reaction tank mixed liquid after separating the carrier S and the inflowing water flowing in from the downstream inlet 4 are efficiently mixed. Therefore, the organic substance is easily adsorbed on the floc, and the activated sludge treatment efficiency is increased.

  When the cleaning aeration equipment 30 is installed, as the cleaning aeration equipment 30, an air diffuser extending in the inflow direction is installed in the lower part on the upstream side of the carrier separation plate 2. The carrier separation plate 2 is basically flat, but is not limited thereto, and may be U-shaped or L-shaped, or may be an arrangement in which the stirring equipment in FIG. 22 is changed to an aeration equipment. The shape of the carrier separation plate 2 is appropriately determined depending on the flow velocity of the incoming water.

Embodiment 17
FIG. 24 is a perspective view showing a conceptual configuration of a carrier input type bioreactor according to Embodiment 17 of the present invention.
In the seventeenth embodiment, an agitation facility 31 is installed on the downstream side of the carrier separation plate 2 in the biological reaction tank 1. This agitation equipment 31 prevents the carrier S from adhering to the carrier separation plate 2 in order to prevent the biological reaction tank mixture on the downstream side of the carrier separation plate 2 from slowing down, settling, and accumulating in the lower part of the tank. The carrier separation plate 2 is washed. When the inflow water of the biological reaction tank 1 increases, the carrier separation plate 2 can be prevented from being blocked by increasing the stirring power of the stirring facility 31. In addition, when excessive influent water flows in from the downstream inlet, the biological reaction tank mixed liquid after separating the carrier S and the influent water flowing in from the downstream inlet 4 can be efficiently mixed. Organic substances are more likely to be adsorbed on the floc, resulting in increased processing efficiency. It has an effect of promoting contact between the excess influent water and activated sludge and preventing sedimentation of sludge.
In the seventeenth embodiment, only the agitation equipment 31 is shown, but it may be shared with the cleaning aeration equipment 30 of the sixteenth embodiment, and even if the cleaning aeration equipment and the agitation equipment are installed as shown in FIG. Well, by installing both the cleaning aeration equipment 30 and the stirring equipment 31, there is an effect that the cleaning efficiency and the processing efficiency of the carrier separation plate 2 are further increased.

Example 1.
In the biological reaction tank 1 in Embodiment 1 shown in FIG. 1, the inflow regulator (automatic gate) has increased to an influent water amount of 15,000 m ³ / day or more during operation with respect to the designed treated water amount of 7,500 m ³ / day. ) Was opened and allowed to flow into the downstream inlet of the carrier separation plate.
As a result, since the amount of inflow water in the biological reaction tank 1 could be maintained below the design value, normal operation could be maintained without stagnation or blockage of the carrier in the vicinity of the carrier separation plate.
The inflow water BOD concentration was normally 200 mg / L, but decreased to 120 mg / L at the inflow water peak. Before the emergency inlet was installed, the BOD concentration was discharged at 80 mg / L after the simple treatment before the disinfection treatment. After the emergency inlet was installed, the 120 mg / L BOD of the influent water could be reduced to 7 mg / L by being adsorbed by the biological reaction tank mixture on the downstream side of the carrier separation plate.
In addition, when the inflow water amount decreased to the design value, the inflow adjuster (automatic gate) was closed and returned to normal operation.

Example 2
In the biological reaction tank 1 in Embodiment 2 shown in FIG. 3, the design treated water amount is 10,000 m ³ / day, and 30,000 m ³ / day is caused by an accident such as a water pipe near the road where the sewer pipe is buried. The amount of inflow water increased. At the time of receiving notification of the accident, it overflowed from the overflow weir (inflow adjuster) during rainy weather, and excess influent flowed from the downstream inlet of the carrier separation plate. At this time, since the amount of inflow water in the biological reaction tank 1 was maintained below the design value, normal operation could be maintained without stagnation or blockage of the carrier in the vicinity of the carrier separation plate. Inflow water BOD was about 80 mg / L BOD because most of the increased water was tap water.

Example 3 FIG.
In biological reactor 1 in the fourth embodiment shown in FIG. 7, increasing to design processing water 2,000 m ³ / day, up to a large amount of unknown water flows, 10,000 m ³ / day or more inflow water amount by weather disasters did. Overflowing from the fixed overflow weir (inflow regulator), excess inflow water flowed in from the downstream inlet of the carrier separation plate. Since the amount of inflow water in the biological reaction tank 1 was maintained below the design value, normal operation could be maintained without stagnation or blockage of the carrier in the vicinity of the carrier separation plate.
Moreover, when the inflow water amount was reduced to the design value, the overflow from the fixed overflow weir (inflow regulator) disappeared and the normal operation was resumed.

It is a schematic perspective view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 1 of this invention. It is a schematic perspective view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 2 of this invention. It is a schematic cross-sectional top view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 3 of this invention. 4A is a cross-sectional view showing the gate installation portion in FIG. 3 in the gate open state, FIG. 4B is a cross-sectional view showing the gate closed state in FIG. 4A, and FIG. 4C is FIG. It is sectional drawing which shows a gate installation part in a half open state. It is a schematic cross-sectional top view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 4 of this invention. 6A is a cross-sectional view showing the manual gate installation portion in FIG. 5 in the gate open state, FIG. 6B is a cross-sectional view showing the gate closed state in FIG. 6A, and FIG. It is sectional drawing which shows the change of the gate open state of 6 (A), and a closed state. It is a schematic perspective view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 5 of this invention. It is a schematic perspective view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 6 of this invention. It is a schematic top view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 7 of this invention. It is a schematic perspective view of the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 8 of this invention. It is a schematic perspective view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 9 of this invention. It is a schematic perspective view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 10 of this invention. It is a schematic perspective view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 11 of this invention. It is a schematic perspective view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 12 of this invention. It is a schematic perspective view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 13 of this invention. It is a schematic sectional drawing of a carrier separation plate. It is the schematic which shows the example of installation of a carrier separation board in relation to a cleaning aeration equipment. It is a layout view showing the relationship among the carrier separation plate, cleaning aeration equipment, and stirring equipment. It is the schematic which shows the example of installation of a carrier separation board. It is a block diagram which shows the carrier injection | throwing-in type bioreaction apparatus by Embodiment 14 of this invention. It is a block diagram which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 15 of this invention. FIG. 22 (A) is a schematic configuration explanatory view showing a carrier input type bioreactor according to Embodiment 16 of the present invention, and FIG. 22 (B) is an explanatory view showing a downstream inlet in FIG. 22 (A). . It is a schematic perspective view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 17 of this invention. It is a schematic perspective view which shows the support | carrier injection | throwing-in type bioreaction apparatus by Embodiment 18 of this invention. It is a schematic perspective view which shows the conventional carrier injection | throwing-in type bioreaction apparatus.

Explanation of symbols

1, 1A, 1B Biological reaction tank 2, 2A, 2B Carrier separation plate 3 Transfer pipe 3a, 3b Branch pipe 4 Downstream inlet 5 Inlet 6 Inflow regulator 6A Electric gate 6B Manual gate 6C Fixed overflow weir 6D Insertion Type plate overflow dam 6E Drop type plate overflow weir 7 Step inlet 8, 9 Carrier separation equipment 10 Carrier return pump 11 Carrier return pipe 11a Suction pipe part 11b Discharge pipe part 12 Air supply pipes 13, 14 Contaminants Removal equipment (screen)
15 Sludge return pipe 16 Contaminant removal equipment (screen)
21, 22 Carrier separation plate 23 First sedimentation basin 24 Final sedimentation basin 25, 26 Screen 27 Overflow weir 30 Cleaning aeration equipment 31 Stirring equipment 61A Opening 61B Opening

Claims (4)

A biological reaction tank for biological treatment using a carrier;
A transfer pipe having an inlet and supplying influent water to the biological reaction tank;
A carrier separation plate disposed in the biological reaction tank and separating the carrier from the biological reaction tank mixture;
A carrier input type bioreactor comprising a downstream inflow port disposed on the transfer pipe and opening on the downstream side of the carrier separation plate. 2. The carrier input type bioreactor according to claim 1, wherein the transfer pipe is provided with a plurality of inlets. The carrier input type bioreaction apparatus according to claim 1 or 2, wherein the biological reaction tank is provided with a plurality of carrier separation plates. 4. The carrier input type bioreactor according to any one of claims 1 to 3, further comprising a screen for removing contaminants from the inflow water and / or the returned sludge supplied to the bioreactor.

Images