CN1331780C - Integrative bioreactor for treating refuse leachate - Google Patents

Abstract

The invention relates to an integrated bioreactor for treating landfill leachate, which relates to the technology of environmental protection. The invention is composed of two biological reaction areas and a regulating area, and each biological reaction area is filled with biological filler to form an aerobic area and an anaerobic area. In the aerobic zone, organic matter is degraded into inorganic carbon by aerobic heterotrophic bacteria, and the nitrification process of ammonia nitrogen is controlled. In the nitrification stage, 50% of ammonia nitrogen is oxidized to nitrite, and the effluent from the aerobic zone is mixed with After the pH regulator is mixed evenly, it enters the anaerobic zone. In the anaerobic zone, anammox bacteria use ammonia nitrogen as the electron donor to reduce nitrite, use nitrite as the electron acceptor to oxidize ammonia nitrogen, convert ammonia nitrogen and nitrite nitrogen into nitrogen, and some organic matter is anaerobic. microbial uptake or degradation. The invention can complete the removal of ammonia nitrogen and organic matter under the water quality condition of low carbon-to-nitrogen ratio of landfill leachate, adjust the impact load of water quality and water quantity of landfill leachate, and operate efficiently and stably.

Description

An integrated bioreactor for treating landfill leachate

technical field

The invention relates to the technical field of environmental protection, and relates to an integrated bioreactor, in particular to a bioreactor for treating landfill leachate.

Background technique

Landfill leachate is a kind of high-concentration ammonia-nitrogen wastewater that is harmful and difficult to treat. It contains a variety of pollutants, the main water quality characteristics: high concentration of ammonia nitrogen, and the imbalance of carbon and nitrogen (C/N) ratio; BOD ₅ /CODcr ratio changes greatly, and the temporal and regional variability of water quality and water quantity. At present, the main technologies for treating leachate at home and abroad include biological treatment and physical and chemical treatment. Although physical and chemical treatment technology has a good treatment effect, it is expensive, energy-consuming, and prone to secondary pollution. Biological treatment technology has the advantages of economy and simplicity. And is generally adopted.

Traditional biological denitrification includes two steps of biological aerobic nitrification and denitrification, and the process flow is shown in Figure 5. After the sewage is input into the denitrification tank for treatment, it enters the complete nitrification tank for treatment. Part of the mixed liquor from the complete nitrification tank flows back into the denitrification tank for secondary treatment, and part of it enters the secondary sedimentation tank for sedimentation. Secondary treatment in the nitrification tank, part of which is discharged, and the qualified water in the upper layer is discharged from the top.

This technology treats landfill leachate, and there are the following main problems:

(1) High energy consumption, 4.57g of oxygen is required for complete nitrification of 1g of ammonia nitrogen.

(2) The denitrification process requires sufficient organic carbon sources as electron donors to ensure the denitrification rate. For landfill leachate with high ammonia nitrogen and low carbon-to-nitrogen ratio (C/N), it is difficult to effectively denitrify, resulting in low denitrification efficiency, and the addition of carbon sources not only increases the treatment cost, but also easily causes secondary pollution

(3) The technological process is complicated, and the return flow of sludge and mixed liquid increases the power cost.

Landfill leachate has time and geographical variability of water quality and water quantity. The current biological treatment facilities and reaction devices cannot well adjust the load impact of water quality and water quantity, and have major shortcomings such as unstable operation and low treatment efficiency.

Contents of the invention

The purpose of the present invention is to overcome the problems faced by existing treatment facilities, combine nitrification and anaerobic ammonia oxidation technology, and propose an integrated bioreactor capable of stably and efficiently treating landfill leachate.

In order to achieve the above object, the technical solution of the present invention is to provide an integrated bioreactor for treating landfill leachate, which is a closed container and consists of three parts: an aerobic biological reaction zone, an anaerobic biological reaction zone and a regulation zone. Part of each biological reaction zone is filled with biological fillers, and operates under aerobic and anaerobic conditions respectively, and the regulating zone is located between the aerobic zone and the anaerobic zone;

The upper and middle structures of the aerobic bioreaction zone and the anaerobic bioreaction zone are the same. In the cavity of the two zones, a horizontal support is provided horizontally above the upper part. There is a three-phase separator. The three-phase separator is composed of a central cylinder and an inverted cone. The central cylinder is an inverted T shape. The upper cylinder is fixed to the middle of the bracket. The lower end is a bell mouth. The surrounding edges of the inverted cone are fixed to the inner wall of the cavity, and spherical fillers are installed under the three-phase separators;

An outlet pipe is provided on the upper side wall of the chamber of the anaerobic biological reaction zone;

The top of the aerobic biological reaction area and the anaerobic biological reaction area are equipped with water seals, and the upper side of the center is fixed with a gas discharge pipe, and the other ends of the two gas discharge pipes are connected to gas treatment equipment;

There is a sewage inlet pipe horizontally above the lower part of the chamber in the aerobic biological reaction zone, and an aeration plate is arranged horizontally below the sewage water inlet pipe. The wall is provided with an air intake pipe;

There is a water distribution plate horizontally above the lower part of the chamber in the anaerobic biological reaction zone. There are multiple water distribution holes on the water distribution board. The surrounding edges are fixed to the inner wall of the chamber. After the wall passes through, it is connected to the heating equipment;

There is a water outlet above the side wall adjacent to the aerobic bioreaction area and the adjustment area, which connects the aerobic bioreaction area and the adjustment area;

There is a water inlet below the side wall adjacent to the anaerobic biological reaction zone and the regulating zone, which connects the anaerobic biological reaction zone and the regulating zone;

A dosing pipe is provided at the top of the chamber in the regulating area, and the outer end of the dosing pipe communicates with the dosing equipment.

In the integrated bioreactor, a socket is also provided on the outer wall of the aerobic bioreaction zone, and a dissolved oxygen monitor electrode is installed on the socket;

On the outer wall of the anaerobic biological reaction zone, the upper outlet pipe communicates with the sewage inlet pipe in the aerobic zone of the reactor, a return pump is installed on the pipeline connecting the outlet pipe and the sewage inlet pipe, and a pH and temperature monitor is installed below , redox potential monitor;

A water distribution device is provided in the cavity of the regulating area.

In the integrated bioreactor, there are a plurality of heating pipes, which merge into a main pipe, and the main pipe passes through the side wall and is connected with the heating equipment.

In the integrated bioreactor, the water distribution device is composed of a water outlet tank and a water distribution pipe, and the water distribution pipe is further divided into a water distribution main pipe and a water distribution branch pipe; the water distribution device has three structures.

In the integrated bioreactor, the three structures of the water distribution device, the first one is to set a water outlet horizontally in the middle of the cavity of the adjustment area, below the water outlet of the aerobic bioreaction area, There are multiple holes on the bottom surface of the water outlet tank, the holes are arranged along the diagonal or radial direction of the reactor, and the water distribution branch pipe is fixed vertically under the hole, and the length of the water distribution branch pipe gradually increases from one end to the other end according to the diagonal line or diameter of the reactor. lengthened;

The second is to set a water outlet horizontally in the middle of the chamber of the adjustment area below the water outlet of the aerobic biological reaction area. There are a plurality of holes on the bottom surface of the water outlet. The main water distribution pipe, the main water distribution pipe is equidistantly arranged in the vertical direction with multiple water distribution branch pipes horizontally;

The third type is composed of several second water distribution devices.

In the integrated bioreactor, the two ends of the branch water distribution pipe in the second water distribution device are tilted upward.

In the integrated bioreactor, the water distribution device in the adjustment area can be of different structures according to different needs; when the design water volume is large and the reactor volume is large, the first or third water distribution device can be selected. device; when the outlet side wall width of the aerobic reaction zone is less than 1 to 1.5 meters, choose the second water distribution device; the water distribution pipe in the water distribution device can be increased according to the actual water volume.

In the integrated bioreactor, the reflux pump constitutes a reflux system, and part of the effluent from the anaerobic biological reaction zone flows back to the water inlet of the reactor, and is mixed with landfill leachate into the aerobic reaction zone to reduce the high concentration The load impact of pollutants, the return flow depends on the concentration of pollutants in the landfill leachate. When the concentration of ammonia nitrogen in the influent is lower than 1000mg/L, the return flow stops.

The integrated bioreactor is characterized in that:

In the aerobic biological reaction zone, microorganisms and nitrosating bacteria that degrade organic matter attach and grow on the biological filler, organic matter is degraded into inorganic carbon by aerobic heterotrophic bacteria, and the nitrification process of ammonia nitrogen is controlled in the nitrification stage, and the 50 %～55% of ammonia nitrogen is oxidized to nitrite;

In the anaerobic biological reaction zone, the cultured anammox bacteria attach and grow on the filler, and the anammox bacteria use ammonia nitrogen as an electron donor to reduce nitrite, and use nitrite as an electron acceptor to oxidize ammonia nitrogen , convert ammonia nitrogen and nitrite nitrogen into nitrogen, and some organic matter is absorbed or degraded by other anaerobic microorganisms;

The water distribution device in the adjustment area can adjust the water quality, so that the effluent from the aerobic biological reaction area in different periods can be fully mixed in the pre-mixing area, and at the same time adjust the pH value of the water to ensure the stability of the water quality and make the anaerobic reaction area in the best condition .

The integrated reactor for treating landfill leachate in the present invention has the following advantages:

(1) Microorganisms are diverse and can survive for a long time.

(2) The denitrification efficiency is high, and there is no need to add organic carbon sources.

(3) The process flow is simple, no need for sludge reflux, low energy consumption, no need to set up a separate sedimentation tank, and the operation is simple.

(4) Stable operation, resistant to load impact of water quality and water quantity

(5) The process layout is compact, the land occupation is small, and the infrastructure investment is low.

(6) The reactor is closed and operated, and the gas generated is collected and discharged in a centralized manner to ensure the environmental sanitation of the treatment site.

Description of drawings

Fig. 1 is a structural diagram of an integrated bioreactor for treating landfill leachate according to the present invention.

Fig. 2 is a schematic diagram of a water distribution device 23A of the present invention.

Fig. 3 is a schematic diagram of the water distribution device 23B of the present invention.

Fig. 4 is a schematic diagram of a water distribution device 23C of the present invention.

Figure 5. Traditional biological denitrification process flow chart.

Detailed ways

As shown in FIG. 1 , it is a structural diagram of an integrated bioreactor for treating landfill leachate according to the present invention. The integrated bioreactor is a closed container, which consists of two biological reaction areas and one adjustment area. The three areas are connected to each other in the closed overall container. Each biological reaction area is filled with biological fillers to form an aerobic area 1 and anaerobic zone 3, conditioning zone 2 is located between aerobic zone 1 and anaerobic zone 3.

The upper and middle structures of the aerobic bioreaction zone 1 and the anaerobic bioreaction zone 3 are the same, but the components of the aerobic bioreaction zone 1 are smaller than those of the anaerobic bioreaction zone 3 . In the chambers of the two regions, a horizontal bracket 17, 17a is arranged horizontally above the upper part. Constituted with inverted cones 8, 8a, the central cylinder 16, 16a is an inverted T shape, the upper cylinder is fixedly connected to the middle part of the bracket 17, 17a, the lower end is a bell mouth, and the horizontal side angle of the bell mouth is 60 °, the central cylinder 16, 16a Inverted cones 8, 8a are arranged horizontally below the bell mouth, the surrounding edges of the inverted cones 8, 8a are fixedly connected to the inner wall of the cavity, the angle between the bottom surface and the side of the inverted cones 8, 8a is 120°, and each of the three-phase separators below Spherical fillers 7, 7a are provided; an outlet pipe 22 is provided on the upper side wall of the cavity of the anaerobic biological reaction zone 3 .

The tops of the aerobic biological reaction zone 1 and the anaerobic biological reaction zone 3 are provided with water seals 10, 10a, and a gas discharge pipe 20 is fixedly connected to the upper side of the center, and the other end of the gas discharge pipe 20 is connected to gas treatment equipment.

The lower structures in the cavities of the aerobic biological reaction zone 1 and the anaerobic biological reaction zone 3 are different. In the aerobic biological reaction zone 1, a sewage water inlet pipe 4 is horizontally arranged above the lower part of the chamber, and an aeration plate 5 is horizontally arranged below the sewage water inlet pipe 4. Then, the lower side wall is provided with an air intake pipe 21.

In the anaerobic biological reaction zone 3, there is a water distribution plate 13 horizontally above the lower part of the cavity, and there are multiple water distribution holes on the water distribution plate 13. 19. A plurality of heating pipes 19 merge into a main pipe, and the main pipe passes through the side wall and is connected with the heating equipment.

There is a water outlet 9 above the side wall adjacent to the aerobic bioreaction zone 1 and the regulation zone 2, which connects the aerobic bioreaction zone 1 and the regulation zone 2.

There is a water inlet 12 under the side wall adjacent to the anaerobic biological reaction zone 3 and the regulating zone 2, which connects the anaerobic biological reaction zone 3 and the regulating zone 2.

The outer wall of the aerobic biological reaction zone 1 is also provided with a socket 6, and a dissolved oxygen monitor (DO) electrode is installed on the socket 6.

On the outer wall of the anaerobic biological reaction zone 3, the outlet pipe 22 above communicates with the sewage inlet pipe 4 of the aerobic zone 1 of the reactor. A pH and temperature monitor 14 and an oxidation-reduction potential (ORP) monitor 15 are provided.

A dosing tube 11 is provided at the top of the cavity of the regulating area 2, and the outer end of the dosing tube 11 communicates with the dosing equipment.

In the cavity of the adjustment area 2, a water distribution device 23 is provided. The water distribution device 23 is composed of a water outlet tank 231 and a water distribution pipe. The water distribution pipe is further divided into a water distribution main pipe 232 and a water distribution branch pipe 233. The water distribution device 23 has three structures: a water distribution device 23A, a water distribution device 23B and a water distribution device 23C.

As shown in Figure 2, it is a water distribution device 23A, which is in the middle of the cavity of the conditioning area 2, below the water outlet 9 of the aerobic bioreaction area 1, and a water outlet 231 is horizontally arranged. The holes are arranged along the diagonal direction (or radial direction) of the reactor, and a water distribution branch pipe 233 is vertically fixed below the hole. lengthened.

As shown in Figure 4, it is a water distribution device 23C, which is in the middle of the cavity of the adjustment area 2, below the water outlet 9 of the aerobic biological reaction area 1, and a water outlet 231 is horizontally arranged, and there are many water outlets on the bottom of the water outlet 231. The holes are arranged in a row, and the bottom of the hole is vertically fixed with a main water distribution pipe 232, and the main water distribution pipe 232 is provided with a plurality of water distribution branch pipes 233 equidistantly in the vertical direction, and the two ends of the water distribution branch pipe 233 are upturned.

As shown in FIG. 3 , it is a water distribution device 23B, and the water distribution device 23B is composed of several water distribution devices 23C.

The water distribution device 23 can select different water distribution devices according to different needs. When the design water volume is large and the volume of the reactor is large, the water distribution devices 23A and 23B should be selected. When the outlet side wall width of the aerobic reaction zone 1 is less than 1-1.5 meters, the water distribution device 23C should be selected; the water distribution devices 23A and 23B The water distribution pipes can be increased correspondingly according to the actual water volume; the water distribution branch pipes 233 of the water distribution device 23A are arranged according to the diagonal of the reactor, so as to achieve the purpose of uniform water distribution.

Both the aerobic reaction zone 1 and the anaerobic reaction zone 3 in the reactor adopt an upward-flowing fixed-bed biofilm reactor structure, and spherical fillers 7 and 7a are installed in the lower layer. Water seals 10, 10a are installed on the top of the reactor to keep the smell in the reactor from escaping, and the various gases produced are collected and treated for discharge to ensure the sanitation of the treatment site.

The landfill leachate flows into the aerobic biological reaction zone 1 from the bottom, distributes water evenly to the reaction zone through the water distribution pipe 4, and supplies gas to the reactor through the aeration device 5 from the gas supply facility to provide the oxygen required for the biological aerobic reaction, and run During the process, a dissolved oxygen monitor (DO) electrode is installed on the socket 6 to monitor the dissolved oxygen in the reaction zone, and adjust the aeration rate according to different influent water quality and water volume, that is, different influent pollutant loads, so as to control sub- purpose of nitrification. The waste water is in contact with the biofilm grown on the filler 7, part of the ammonia nitrogen (NH ₄ -N) in the leachate is oxidized to nitrite nitrogen (NO ₂ -N), and most of the easily biodegradable organic matter is destroyed by aerobic heterotrophic bacteria Degraded into inorganic carbon, the mixed liquid of biodegraded wastewater and suspended sludge passes through the three-phase separator 8, the gas is mainly collected in the upper central cylinder 16, and discharged upward through the gas discharge pipe 20, and the sludge is flocculated, precipitated, and clarified The water flows out from the water outlet 9 and enters the adjustment area 2. After the water outlets in different periods are fully mixed and uniform through the water distribution device 23, the water automatically flows into the anaerobic biological reaction area 3 through the water inlet 12 below the anaerobic biological reaction area 3, and the waste water automatically flows into the anaerobic biological reaction area 3. Flow through the water distribution plate 13 from bottom to top. Under anaerobic conditions, the microorganisms grown on the filler 7a perform biological metabolism, and the anammox bacteria use ammonia nitrogen (NH ₄ —N) as the electron donor to reduce nitrite, thereby Nitrite (NO ₂ -N) is an electron acceptor to oxidize ammonia nitrogen (NH ₄ -N), convert ammonia nitrogen and nitrite nitrogen into nitrogen (N ₂ ), and some organic matter is absorbed or degraded by other anaerobic microorganisms. After the biodegraded waste water is separated from gas, water and mud by the three-phase separator 8a, the supernatant is discharged, and the effluent is passed through a water seal to ensure that air does not enter the reactor. The online control interface of pH and temperature monitor 14, oxidation-reduction potential (ORP) monitor 15 is installed on the anaerobic reaction area 3, in operation, the pH of wastewater in the reaction area is lower than 8, and the dosing pump in the online control system Start, pump the alkali agent into the adjustment area 2 through the dosing pipe 11, and after fully mixing with the effluent from the aerobic area 1, it will automatically flow into the anaerobic area 3 from the lower water inlet 12, and adjust the pH in the anaerobic area 3 to reach Operation requirements to ensure the normal progress of the anammox biological reaction; due to the temperature requirements of the anammox biological reaction, a heating pipe 19 is installed at the bottom of the anaerobic zone 3 to heat the wastewater in the reactor when the ambient temperature drops . The outlet pipe 22 of the anaerobic zone 3 is connected to the sewage inlet pipe 4 of the aerobic zone 2 of the reactor. When the water quality of the landfill leachate changes and the concentration of pollutants increases greatly, the reflux pump 18 is used to return the outlet water of the reactor to the garbage seepage. The filtrate enters the aerobic zone 1 after being mixed and diluted to reduce the load of influent pollutants, reduce the impact on the reactor, and ensure the stable operation of the reactor.

Water seals 10 and 10a are installed on the top of the reactor, and the gas generated by the biological reaction is collected from the top of the reactor and sent to the processing equipment through the gas discharge pipe 20 for discharge.

The principle of the treatment technology adopted by the reactor in the present invention is: oxidize about 50% of the ammonia nitrogen in the landfill leachate to nitrite nitrogen, that is, the nitrification process only proceeds to the nitrosation stage, and removes most of the easily biodegradable organic matter at the same time; Under anaerobic conditions, use the remaining 50% ammonia nitrogen as the electron donor and nitrite nitrogen as the electron acceptor to convert ammonia nitrogen and nitrite nitrogen into nitrogen gas.

The processing technique of the present invention has the following advantages:

(1) The nitrification reaction only proceeds to the nitrosation stage, and only about 50% of ammonia nitrogen is oxidized to nitrite nitrogen, saving energy consumption by 62.5%. .

(2) Save 100% denitrification organic carbon source.

Example 1

Please refer to attached picture 1.

Landfill leachate is used as wastewater treatment. The entire technological process has been running continuously and stably for nearly four months, and the treatment effect of the reactor is as follows:

Influent concentration of ammonia nitrogen (NH ₄ -N): 1282.9mg/L, effluent concentration: 108.6mg/L, removal rate: 91.5%; TN influent concentration: 1424.6mg/L, effluent concentration: 260.1mg/L, Removal rate: 81.6%; CODcr influent concentration: 1035.5mg/L, effluent concentration: 279mg/L, removal rate: 73%.

Claims (9)

1. the integrated bioreactor of a treating refuse percolate, container for sealing, form by aerobe reaction zone, anaerobe reaction zone and regulatory region three parts, subregion filled biomass filler is all arranged in each bio-reaction zone, and under aerobic and anaerobic condition, move respectively, regulatory region is between aerobic zone and anaerobic zone; It is characterized in that:

Top, central structure in aerobe reaction zone and the anaerobe reaction zone cavity volume are identical, in two district's cavity volumes, each level of top, top is provided with a horizontal support, horizontal support two ends and sidewall are affixed, the middle part respectively is provided with triphase separator, triphase separator is made of central tube and inversed taper platform, central tube is an inverted T shape, upper end cylinder and mid-stent are affixed, the lower end is a hydraucone, central tube hydraucone lower horizontal is provided with inversed taper platform, and edge and cavity volume inwall are affixed around the inversed taper platform, and the triphase separator below respectively is provided with the ball-type filler;

Upper portion side wall in the anaerobe reaction zone cavity volume is provided with rising pipe;

The top of aerobe reaction zone and anaerobe reaction zone all is provided with manhole cover, and wherein side is connected with gas outlet pipe in the heart, another termination gas processing device of two gas outlet pipes;

The bottom upper horizontal is provided with sewage water inlet pipe in the aerobe reaction zone cavity volume, and the sewage water inlet pipe lower horizontal is provided with aeration board, and a plurality of holes are arranged on the aeration board, and edge and cavity volume inwall are affixed around it, and its lower sidewalls is provided with inlet pipe;

The bottom upper horizontal is provided with water distribution board in the anaerobe reaction zone cavity volume, and a plurality of water distributing pores are arranged on the water distribution board, and edge and cavity volume inwall are affixed around it, and its lower horizontal is provided with heating tube, and heating tube passes the back from sidewall and links to each other with heating installation;

There is water outlet the sidewall top that aerobe reaction zone and regulatory region are adjacent, and aerobe reaction zone and regulatory region are communicated with;

There is water-in the sidewall below that anaerobe reaction zone and regulatory region are adjacent, and anaerobe reaction zone and regulatory region are communicated with;

The top of regulatory region is provided with chemical feed pipe, and the chemical feed pipe outer end communicates with medicine machine.

2. integrated bioreactor as claimed in claim 1 is characterized in that: also be provided with socket on the outer side wall of described aerobe reaction zone, dissolved oxygen monitoring meter electrode is installed on the socket;

On the outer side wall of anaerobe reaction zone, the rising pipe of top communicates with the sewage water inlet pipe of reactor aerobic zone, is provided with reflux pump on rising pipe and pipeline that sewage water inlet pipe is communicated with, and the below is provided with pH and temperature monitoring meter, redox potential monitoring meter;

In the cavity volume of regulatory region, be provided with water-distributing device.

3. integrated bioreactor as claimed in claim 1 is characterized in that: described heating tube is a plurality of, imports a house steward, and house steward passes the back from sidewall and links to each other with heating installation.

4. integrated bioreactor as claimed in claim 2 is characterized in that: described water-distributing device, to form by effluent trough and water distributing pipe, and water distributing pipe is divided into distributing main, range pipe again; Water-distributing device has three kinds of structures.

5. integrated bioreactor as claimed in claim 4, it is characterized in that: three kinds of structures of described water-distributing device, first kind is middle part in the cavity volume of regulatory region, in the below of aerobe reaction zone water outlet, level is established an effluent trough, and a plurality of holes are arranged on the effluent trough bottom surface, hole cistron device diagonal or radial array, hole below vertically is connected with range pipe, and the length of range pipe extends to the other end gradually according to an end of reactor diagonal lines or diameter;

Second kind is middle part in the cavity volume of regulatory region, and in the below of aerobe reaction zone water outlet, level is established an effluent trough, a plurality of holes are arranged on the effluent trough bottom surface, the hole is arranged in delegation, and the below, hole vertically is connected with distributing main, and the distributing main in the vertical direction equidistantly is horizontally disposed with a plurality of range pipes;

The third is to be combined by several second kind of water-distributing device.

6. integrated bioreactor as claimed in claim 5 is characterized in that: the range pipe in described second kind of water-distributing device, its two ends are upturned.

7. integrated bioreactor as claimed in claim 5 is characterized in that: the water-distributing device of described regulatory region, can select different structures for use according to different needs; When designed water is big, when reactor volume is big, select first kind or the third water-distributing device for use; Aerobic reactor zone water outlet sidewall is wide during less than 1～1.5 meter, selects second kind of water-distributing device; Water distributing pipe in the water-distributing device can be according to the corresponding increase of actual amount of water.

8. integrated bioreactor as claimed in claim 2, it is characterized in that: described reflux pump, constitute return-flow system, the effluent recycling of part anaerobe reaction zone is to reactor water inlet place, be mixed into aerobic reactor zone with percolate, to reduce the load impact of high density pollution thing, quantity of reflux is decided on Pollutant levels in the percolate, when ammonia nitrogen concentration was lower than 1000mg/L in the water inlet, backflow stopped.

9. as claim 1,2,3,4,5,6 or 7 described integrated bioreactors, it is characterized in that:

In the described aerobe reaction zone, the microorganism of degradation of organic substances and nitrococcus apposition growth are on biologic packing material, organism is degraded to inorganic carbon by aerobic heterotrophic bacterium, and the nitrifying process of control ammonia nitrogen is in the nitrosification stage, and keeps 50%～55% ammonia nitrogen to be oxidized to nitrite;

In the described anaerobe reaction zone, cultivate the anaerobic ammonia oxidizing bacteria apposition growth on filler, anaerobic ammonia oxidizing bacteria is that electron donor reduces nitrite with the ammonia nitrogen, with the nitrite is that electron acceptor(EA) comes the oxidation ammonia nitrogen, ammonia nitrogen and nitrite nitrogen are transformed into nitrogen, and partial organic substances is absorbed by other anaerobion or degrades;

The water-distributing device of regulatory region, adjustable water saving matter makes aerobe reaction zone water outlet thorough mixing in the pre-mixing district of different periods, and the pH value of regulating water simultaneously is to guarantee the stable of water quality and to make the anaerobic reaction district at optimum.

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