CN108298690B - Integrated Partial Nitrosation-ANAMMOX Inclined Plate Enhanced Bioreactor - Google Patents

Abstract

The invention provides an integrated partial nitrosation-anammox slanted plate enhanced bioreactor. The main structure of the bioreactor is a cuboid, which is divided into an aerobic zone, a transition zone, anaerobic zone, a diversion zone, and a separation zone from left to right, including water inlet pipes, compartment double-sided water distributors, microporous aeration pipes, aerobic zone mud discharge pipes, transition zone and anaerobic zone sludge discharge pipes, separation zone mud discharge pipes, return pipes, aerobic zone and transition zone exhaust pipes, anaerobic zone exhaust pipes, and separation zones. Pipe, outlet tank, outlet pipe, baffle, combined sloping plate I, combined sloping plate II, sloping plate. The bioreactor can realize autonomous allocation between functional areas, completely avoid the poisonous effect of aeration on anaerobic functional microorganisms, greatly improve the separation effect of mud and water, and improve the overall denitrification efficiency of the reactor. The beneficial effects are as follows: 1) The impact load resistance is strong, and the occupied area is small. 2) Avoid the influence of aeration on the performance of the reactor. 3) Realize the autonomous allocation of functional areas. 4) Improve the overall efficiency of the reactor.

Description

Integrated Partial Nitrosation-ANAMMOX Inclined Plate Enhanced Bioreactor

technical field

The invention relates to a biological autotrophic denitrification reactor for sewage, which belongs to the field of biological treatment for denitrification of sewage, in particular to an integrated partial nitrosation-anammox slant plate enhanced bioreactor.

Background technique

The Ministry of Environmental Protection pointed out in 2017 the environmental quality of surface water that ammonia nitrogen has become one of the main pollution indicators of surface water in my country. In recent years, the concentration of ammonia nitrogen discharged in the process of life and production has far exceeded the self-purification capacity of the receiving water body, which has become a major problem in the protection of my country's water environment. Ammonia nitrogen pollution will not only cause a series of environmental problems such as eutrophication of water bodies, but also a major hidden danger that threatens human health.

When the traditional denitrification technology treats ammonia nitrogen wastewater, there are problems such as high operating costs and difficulties in sludge disposal. The partial nitritation-anaerobic ammonium oxidation (PN-ANAMMOX) process is a new type of fully autotrophic denitrification technology, which can solve the existing problems of traditional denitrification. During the operation of this process, no organic carbon source is needed, the sludge output is low, and the aeration rate can be saved by 25%, which can greatly reduce the treatment cost. The bioreactor is the core of the partial nitrosation-anammox process. There are two main types of partial nitrosation-anammox bioreactors: split type and integrated type. The integrated type has the characteristics of saving investment costs and realizing the internal balance of alkalinity. However, the aeration process affects the activity of ANAMMOX functional bacteria, which leads to a slow increase in the overall denitrification capacity of the reactor, and the aerobic zone and anaerobic zone cannot be independently allocated.

Contents of the invention

Aiming at the problems of functional area allocation and the effect of aeration on the activity of anammox functional flora in current partial nitrosation-anammox bioreactors, the present invention proposes a new type of partial nitrosation-anammox slant-plate enhanced bioreactor that can overcome the deficiencies of existing devices.

In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions to achieve:

The integrated partial nitrosation-anammox slant-plate enhanced bioreactor of the present invention has a cuboid structure and can be made of steel plates or plexiglass. It can be an integrated device for sewage denitrification treatment, or it can be an assembled modular monomer and other different treatment processes to form a composite treatment facility. The integrated partial nitritation-anammox bioreactor includes the main body of the bioreactor, the double-sided water distributor of the compartment, the water inlet pipe, the microporous aeration pipe, the sludge discharge pipe in the aerobic zone, the sludge discharge pipe in the transition zone and the anaerobic zone, the sludge discharge tube in the separation zone, the return pipe, the exhaust pipe in the aerobic zone and the transition zone, the exhaust pipe in the anaerobic zone, the exhaust pipe in the separation zone, the water outlet tank, and the water outlet pipe. From left to right, the main body of the bioreactor is an aerobic zone, a transition zone, an anaerobic zone, a diversion zone, and a separation zone.

The aerobic zone is built with semi-soft fiber bundle packing and water distributors on both sides of the compartment. The aerobic zone is separated from the transition zone on the right side by the baffle, but it communicates with the gap between the baffle and the combined sloping plate I; it is separated from the anaerobic zone by the combined sloping plate I. The leftmost bottom of the aerobic zone is equipped with compartment double-sided water distributors and microporous aeration tubes from left to right. The water distributor on both sides of the compartment is connected with the water inlet pipe. The aerobic zone and the transition zone exhaust pipes are arranged on the roof of the aerobic zone, and the aerobic zone mud discharge pipe is arranged at the junction of the aerobic zone and the bottom of the baffle.

A fluidized bed filler K1 is built in the transition zone. The left side of the transition zone is separated from the aerobic zone by the baffle, but communicated with the gap between the baffle and the combined inclined plate I; separated from the anaerobic zone by the combined inclined plate I, but communicated through the gap between the combined inclined plate I and the combined inclined plate II.

The anaerobic zone is located between the transition zone and the separation zone, and is separated from the transition zone by the combined sloping plate I, but communicates through the gap between the combined sloping plate I and the bottom of the combined sloping plate II; the combined sloping plate II is separated from the diversion zone and the separation zone, but communicates with the diversion zone through the gap between the combined sloping plate II and the top plate;

The diversion zone is located on the upper right side of the anaerobic zone, separated from the anaerobic zone by the combined inclined plate II, but communicated with the anaerobic zone through the gap between the combined inclined plate II and the top plate; separated from the separation zone by the inclined plate, but communicated with the separation zone through the gap between the inclined plate and the combined inclined plate II.

The separation zone is located on the far right side of the main body of the bioreactor, and is separated from the anaerobic zone and the diversion zone by the combined sloping plate II and the sloping plate respectively, but communicates with the diversion zone through the gap between the sloping plate and the combined sloping plate II; a separation zone exhaust pipe is provided on the top plate of the separation zone, and a water outlet tank, a water outlet pipe, and a return pipe are arranged on the outside, and the separation zone communicates with the water outlet tank through the slit of the water outlet tank; a separation zone sludge discharge pipe is arranged at the junction of the separation zone and the bottom of the combined inclined plate II.

Wherein, the ratio of the length (L), width (W) and height (H) of the bioreactor body is (4-6):1:(2-3), and the volume ratio of the aerobic zone, transition zone, anaerobic zone, and separation zone is 3:1:2:1.

Wherein, the length of the water distributor on both sides of the compartment is equal to the width of the main body of the bioreactor, the double side plate and the main surface of the reactor form a closed compartment, and both side plates are opened with a circular hole array, the diameter (D) of the round hole is (0.05 ~ 0.015) L, and the width of the double side plate is 0.03 L.

Wherein, the length of the microporous aeration pipe is 1/2 of the length of the aerobic zone, and one end is adjacent to the double-sided water distributor of the compartment, arranged along the length direction of the bioreactor, and located on one side of the height surface of the reactor main body.

Wherein, the baffle is located at 1/2L of the main body of the reactor and arranged vertically, and the height of the baffle is (1/2˜2/3)H.

Wherein, the combined inclined plate I is composed of a longitudinal inclined plate and a transverse inclined plate, and the angle between the longitudinal inclined plate and the transverse inclined plate is 150°; the longitudinal inclined plate is joined to the top plate of the reactor, and the horizontal angle is 60°; the horizontal angle between the transverse inclined plate is 30°.

Wherein, the combined inclined plate II is composed of a longitudinal inclined plate and a transverse inclined plate, and the angle between the longitudinal inclined plate and the transverse inclined plate is 150°; the longitudinal inclined plate is joined to the bottom of the reactor main body at a horizontal angle of 60°, and the horizontal inclined plate is 30°; the width of the gap between the combined inclined plate II and the combined inclined plate I is 2-10 cm, and the height of the edge of the transverse inclined plate in the combined inclined plate II is lower than the height of the outlet pipe by 3-15 cm.

Wherein, the inclined plate is joined to the top plate of the main body of the reactor, and the horizontal angle is 60°; the width of the gap between the inclined plate and the combined inclined plate II is 2-10 cm.

Wherein, the height of the slit of the water outlet is 6-15 cm lower than that of the water outlet pipe, and the height of the return pipe is equal to the slit of the water outlet.

Wherein, the exhaust pipes of the aerobic zone and the transition zone, the exhaust pipe of the anaerobic zone, and the exhaust pipe of the separation zone are all located at 1/2 of the width of the top plate of the reactor main body, respectively located at 1/2 of the length of each functional zone, and the inner diameters of the exhaust pipes are all 2 to 10 cm.

Wherein, the aerobic zone is equipped with aerobic denitrification floc sludge, and the volume of the semi-soft fiber bundle filler in the aerobic zone accounts for 25% to 45% of the volume of the aerobic zone; the anaerobic zone is equipped with anammox granular sludge, and the transition zone is filled with fluidized filler K1, and the sludge type is automatically allocated by the reaction process.

The configuration design of the reactor is very important for the reasonable configuration of the functional areas of partial nitrification and anammox, the reduction of the reaction dead zone, the optimization of the flow state in the reactor, and the improvement of the nitrogen removal efficiency. The present invention divides the bioreactor into aerobic zone, transition zone, anaerobic zone, diversion zone, and sedimentation zone by using baffles and combined sloping plates. The transition zone can realize the independent configuration of the half-process nitrification and anammox functional zone, and completely avoid the adverse effect of the aeration process on the activity of anammox functional bacteria; optimize the overall flow state of the reactor by combining the sloping plate, greatly reduce the functional dead zone of the reactor, increase the effective reaction volume of the reactor, and reduce the occupied area; set the sloping plate to prolong the reaction process and reaction time; realize full mixed flow in each functional zone of the reactor, The overall push flow of the reactor can greatly improve the denitrification and removal efficiency; the design of the sloping plate in the sedimentation zone can increase the area of the sedimentation zone, slow down the horizontal flow rate of sewage, which is more conducive to sludge sedimentation, and improve the separation effect of sludge and water; filling the aerobic zone with filler can maintain a high amount of nitrification functional microorganisms in the reactor, significantly increase the denitrification volume load, and improve the reactor’s impact load resistance.

The beneficial effects of the present invention are as follows:

1) Strong impact load resistance and small footprint. The aerobic zone and the transition zone are equipped with fillers, which can maintain a high functional microbial biomass; the anaerobic zone is equipped with anammox granular sludge, and the concentration of anammox functional microorganisms is high. The reactor can reach a higher volume load, thereby occupying a small area, and the high concentration of functional microorganisms can greatly improve the reactor's ability to resist shock loads.

2) Avoid the influence of aeration on the performance of the reactor. The setting of the transition zone can form a buffer space between the aerobic zone and the anaerobic zone. Oxygen can be effectively used by microorganisms in the transition zone, which can completely eliminate its oxygen toxicity to the subsequent anammox functional flora, thereby maintaining the efficient and stable operation of the reactor.

3) Realize the independent allocation of functional areas. The transition zone can independently adjust its functions during the actual operation of the reactor. It can reasonably switch between aerobic half-process nitrification and anammox, and can self-adjust the ratio between the aerobic zone and the anaerobic zone. It can respond quickly and effectively to changes in operating parameters, and independently adjust and rationally allocate.

4) Improve the overall efficiency of the reactor. Reasonable setting of baffles and combined inclined plates can optimize the flow state of the reactor, reduce the functional dead zone of the reactor, prolong the reaction process, increase the reaction time, and achieve full mixing in each functional area of the reactor, while the reactor as a whole realizes plug flow, which greatly improves the denitrification performance of the reactor; increases the surface area of the separation area, thereby reducing the surface velocity of sewage, and improving the separation effect of mud and water.

A series of concepts in simplified form are introduced in the Summary of the Invention, which will be further detailed in the Detailed Description. The summary of the present invention does not mean trying to limit the key features and essential technical features of the claimed technical solution, nor does it mean trying to determine the protection scope of the claimed technical solution.

The advantages and features of the present invention will be described in detail below in conjunction with the accompanying drawings.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing and embodiment, in the accompanying drawing:

Figure 1 is a structural schematic diagram of an integrated partial nitrosation-anammox inclined plate enhanced bioreactor;

Figure 2 is the top view of the integrated partial nitrosation-anammox inclined plate enhanced bioreactor;

Among them, 1. Bioreactor main body; 2. Aerobic zone; 3. Transition zone; 4. Anaerobic zone; 5. Diversion zone; 6. Separation zone; 7. Inlet pipe; 6. Exhaust pipe in the separation area; 17. Outlet tank; 18. Outlet pipe; 19. Baffle plate; 20. Composite inclined plate I; 21. Combined inclined plate II; 22. Inclined plate; 201. Combined inclined plate I longitudinal inclined plate;

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments described here are only used to explain the present invention, not to limit the present invention.

In the following description, numerous specific details are given in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other examples, some technical features known in the art are not described in order to avoid confusion with the present invention.

In order to provide a thorough understanding of the present invention, the detailed structure will be set forth in the following description. It is evident that the practice of the invention is not limited to specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments besides these detailed descriptions.

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 and 2, the integrated partial nitrosation-anammox inclined-plate enhanced bioreactor has a cuboid structure, which can be made of steel plate or plexiglass, and can be used as an integrated device for sewage denitrification treatment, or as a composite treatment facility composed of an assembled modular monomer and other different treatment processes. Including bioreactor main body 1, compartment bilateral water distributor 8, water inlet pipe 7, microporous aeration pipe 9, aerobic zone mud discharge pipe 10, transition zone and anaerobic zone mud discharge pipe 11, separation zone mud discharge pipe 12, return pipe 13, aerobic zone and transition zone exhaust pipe 14, anaerobic zone exhaust pipe 15, separation zone exhaust pipe 16, water outlet tank 17, and water outlet pipe 18. From left to right, the main body of the bioreactor is an aerobic zone 2, a transition zone 3, an anaerobic zone 4, a diversion zone 5, and a separation zone 6.

The aerobic zone 2 is built with semi-soft fiber bundle fillers and water distributors 8 on both sides of the compartment. The aerobic zone 2 is separated from the transition zone 3 on the right side by the baffle plate 19, and communicates with the gap between the baffle plate 19 and the combined sloping plate I20; it is separated from the anaerobic zone 4 by the combined sloping plate I20. The leftmost bottom of the aerobic zone 2 is provided with compartment double-sided water distributors 8 and microporous aeration pipes 9 from left to right, and the compartment double-sided water distributors 8 are connected to the water inlet pipe 7 . The top plate of the aerobic zone 2 is provided with an exhaust pipe 14 for the aerobic zone and the transition zone, and an aerobic zone mud discharge pipe 10 is provided at the junction of the aerobic zone 2 and the bottom of the baffle plate 19 .

The transition zone 3 is built with a fluidized bed filler K1. The left side of the transition zone 3 is separated from the aerobic zone 2 by the baffle 19, but communicates with the gap between the baffle 19 and the combined sloping plate I20, and is separated from the anaerobic zone 4 by the combined sloping plate I20, but communicates with the gap between the combined sloping plate I19 and the combined sloping plate II21.

The anaerobic zone 4 is located between the transition zone 3 and the separation zone 6, and is separated from the transition zone 3 by the combined inclined plate I20, but communicates with the transition zone 3 through the gap between the combined inclined plate I20 and the bottom of the combined inclined plate II21; it is separated from the diversion zone 5 and the separation zone 6 by the combined inclined plate II21, but communicates with the diversion zone 5 through the gap between the combined inclined plate II21 and the top plate; The transition area and the anaerobic area mud discharge pipe 11 are provided at the gap between the 0 and the bottom of the combined sloping plate II 21.

The diversion zone 5 is located on the upper right side of the anaerobic zone 4, and is separated from the anaerobic zone 4 by the combined sloping plate II 21, but communicates with the anaerobic zone 4 through the gap between the combined sloping plate II 21 and the top plate; it is separated from the separation zone 6 by the sloping plate 22, but communicates with the separation zone 6 through the gap between the sloping plate 22 and the combined sloping plate II 21.

The separation zone 6 is located on the far right side of the bioreactor main body 1, and is separated from the anaerobic zone 4 and the flow diversion zone 5 by the combined inclined plate II 21 and the inclined plate 22, but communicates with the diversion zone 5 through the gap between the inclined plate 22 and the combined inclined plate II 21; the separation zone exhaust pipe 16 is arranged on the top plate of the separation zone, and the water outlet tank 17, the water outlet pipe 18 and the return pipe 13 are arranged on the outside, and the separation zone 6 is communicated with the water outlet tank 17 through the slit; The joint is provided with a mud discharge pipe 12 in the separation zone.

Wherein, the ratio of the length (L), width (W) and height (H) of the bioreactor main body 1 is (4-6):1:(2-3), and the volume ratio of the aerobic zone 2, transition zone 3, anaerobic zone 4, and separation zone 6 is 3:1:2:1. The length of the water distributor 8 on both sides of the compartment is equal to the width of the main body of the bioreactor 1. The double side plates and the main body of the reactor form a closed compartment. Both side plates are opened with circular hole arrays. The diameter (D) of the round holes is (0.05 ~ 0.015) L, and the width of both side plates is 0.03L. The length of the microporous aeration pipe 9 is 1/2 of the length of the aerobic zone 2, and one end is adjacent to the double-sided water distributor 8 of the compartment, arranged along the length direction of the bioreactor body 1, and located on the side of the height plane of the reactor body 1. The baffle 19 is located at 1/2L of the main body of the reactor and arranged vertically, and the height of the baffle 19 is (1/2˜2/3)H. The combined inclined plate I20 is composed of a longitudinal inclined plate 201 and a transverse inclined plate 202. The angle between the longitudinal inclined plate 201 and the transverse inclined plate 202 is 150°; the longitudinal inclined plate 201 is connected to the top plate of the reactor, and the horizontal angle is 60°; the horizontal angle between the transverse inclined plate 202 is 30°. The combined inclined plate II 21 is composed of a longitudinal inclined plate 211 and a transverse inclined plate 212. The angle between the longitudinal inclined plate 211 and the transverse inclined plate 212 is 150°; the longitudinal inclined plate 211 is combined with the bottom of the reactor main body at a horizontal angle of 60°, and the horizontal inclined plate 212 is 30°; Water pipe 18 height 3～15cm. The sloping plate 22 is joined to the top plate of the reactor main body 1 with a horizontal angle of 60°; the gap between the sloping plate 22 and the combined sloping plate II 21 has a width of 2-10 cm. The slit height of the water outlet tank 17 is 6-15 cm lower than the height of the water outlet pipe 18 . The exhaust pipe 14 of the aerobic zone and the transition zone, the exhaust pipe 15 of the anaerobic zone, and the exhaust pipe 16 of the separation zone are all located at 1/2 of the width of the top plate of the reactor main body, and respectively located at 1/2 of the length of each functional zone, and the inner diameter of the exhaust pipe is 2 to 10 cm. The aerobic zone 2 is built with aerobic denitrification floc sludge, and the volume of the built-in semi-soft fiber bundle filler accounts for 25% to 45% of the volume of the aerobic zone 1; the anaerobic zone 4 is built with anammox granular sludge, and the transition zone 3 is filled with fluidized filler K1, and the sludge type is automatically configured by the reaction process.

The working process of the integrated partial nitrosation-anammox slanted plate enhanced bioreactor of the present invention is as follows: ammonia nitrogen-containing waste water enters the double-sided water distributor 8 of the compartment through the water inlet pipe 7, and after being fully mixed with the reflux outlet water of the return pipe 13 in the double-sided water distributor 8 of the compartment, the water is evenly distributed in the horizontal and vertical directions through the circular hole arrays on the double-side plates of the compartment double-sided water distributor 8, and then enters the aerobic zone 2. Under the action of agitation and aeration, the sewage is fully mixed and oxygenated to a certain extent in the aerobic zone. The sewage undergoes partial nitrosation in the aerobic zone 2, and part of the ammonia nitrogen is converted into sodium nitrite. The sewage flows through the second half of the aerobic zone. Because there is no microporous aeration tube for aeration, the oxygen content in the sewage gradually decreases; the sewage continues to enter the transition zone 3 through the gap between the baffle plate 19 and the combined inclined plate I20. If the oxygen concentration is high, it is an aerobic or facultative environment. The short-range nitrification reaction is the main one. If the oxygen concentration is low and it is an anoxic or anaerobic environment, the transition zone 3 will perform the function of the anaerobic zone 4, mainly anaerobic ammonium oxidation reaction; the sewage from the transition zone 3 will continue to enter the anaerobic zone 4 through the gap between the combined inclined plate I20 and the combined inclined plate II21. Zone 5: The sewage continues to enter the separation zone 6 from the diversion zone 5 through the gap between the sloping plate 22 and the combined sloping plate II 21. The setting of the combined sloping plate II 21 can increase the surface area of the separation zone, thereby reducing the surface velocity of the sewage and making the muddy water well separated; the sewage continues to flow into the outlet tank 17 through the slit in the separation zone 6 and is discharged through the drain pipe 18.

The content described in the embodiments of this specification is only an enumeration of the implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms stated in the embodiments. The protection scope of the present invention also includes equivalent technical means that those skilled in the art can think of according to the present invention concept.

Claims (7)

1. An integrated partial nitrosation-anammox slanted plate enhanced bioreactor, characterized in that: the main structure of the bioreactor is a cuboid, which is divided into aerobic zone, transition zone, anaerobic zone, diversion zone, and separation zone from left to right, including water inlet pipe, compartment double-sided water distributor, microporous aeration pipe, aerobic zone sludge discharge pipe, transition zone and anaerobic zone sludge discharge pipe, separation zone mud discharge pipe, return pipe, aerobic zone and transition zone exhaust pipe, anaerobic zone exhaust pipe, Separation area exhaust pipe, water outlet tank, outlet pipe, baffle, combined sloping plate I, combined sloping plate II, sloping plate; The aerobic zone is built with semi-soft fiber bundle packing, and the aerobic zone is separated from the transition zone on the right side by a baffle, but communicated with the gap between the baffle and the combined sloping plate I; separated from the anaerobic zone by the combined sloping plate I, the leftmost bottom of the aerobic zone is provided with compartment double-sided water distributors and microporous aeration pipes from left to right, and the compartment bilateral water distributors are connected to the water inlet pipe. There are mud discharge pipes in the aerobic zone; The fluidized bed filler K1 is built in the transition zone, and the left side of the transition zone is separated from the aerobic zone by a baffle, but communicates with the gap between the baffle and the combined sloping plate I; it is separated from the anaerobic zone by the combined sloping plate I, but communicates through the gap between the combined sloping plate I and the combined sloping plate II; The function of the transition zone can be adjusted independently during the actual operation of the reactor. It can be reasonably switched between aerobic half-stage nitrification and anaerobic ammonium oxidation. It can self-adjust the ratio between the aerobic zone and the anaerobic zone, respond quickly and effectively to changes in operating parameters, and independently adjust and distribute reasonably. If the oxygen concentration is high, it is an aerobic or facultative environment. Mainly anaerobic ammonium oxidation reaction; The anaerobic zone is located between the transition zone and the separation zone, and is separated from the transition zone by the combined sloping plate I, but communicates through the gap between the combined sloping plate I and the bottom of the combined sloping plate II; the combined sloping plate II is separated from the diversion zone and the separation zone, but communicates with the diversion zone through the gap between the combined sloping plate II and the top plate; 2. The bioreactor according to claim 1, characterized in that: the diversion zone is located on the upper right side of the anaerobic zone, separated from the anaerobic zone by the combined inclined plate II, but communicated with the anaerobic zone through the gap between the combined inclined plate II and the top plate; separated from the separation zone by the inclined plate, but communicated with the separation zone through the gap between the inclined plate and the combined inclined plate II. 3. The bioreactor according to claim 1, characterized in that: the separation zone is located at the far right of the main body of the bioreactor, and is separated from the anaerobic zone and the flow diversion zone by the combined sloping plate II and the sloping plate, but communicates with the flow diversion zone through the gap between the sloping plate and the combined sloping plate II; the separation zone exhaust pipe is arranged on the top plate of the separation zone, and the water outlet tank, the water outlet pipe, and the return pipe are arranged on the outside, and the separation zone communicates with the water outlet tank through the slit of the water outlet tank; . 4. The bioreactor according to claim 1, characterized in that: the ratio of the length, width, and height of the bioreactor body is (4-6):1:(2-3), and the volume ratio of the aerobic zone, transition zone, anaerobic zone, and separation zone is 3:1:2:1. 5. The bioreactor according to claim 1, characterized in that: the length of the water distributor on both sides of the compartment is equal to the width of the main body of the bioreactor, the double side plates form a closed compartment with the surface of the main body of the reactor, and both side plates are provided with circular hole arrays, the diameter of the round holes is 0.05 to 0.015 of the length of the main body of the reactor, and the width of the double side plates is 0.03 of the length of the main body of the reactor. 6. The bioreactor according to claim 1, characterized in that: the length of the microporous aeration pipe is 1/2 of the length of the aerobic zone, and one end is adjacent to the water distributor on both sides of the compartment, arranged along the length direction of the bioreactor, and located on one side of the height surface of the reactor body; Wherein, the baffle is located at 1/2 of the length of the reactor main body and arranged vertically, and the height of the baffle is (1/2-2/3) the height of the reactor main body. 7. The bioreactor according to claim 1, characterized in that: the combined inclined plate I is composed of a longitudinal inclined plate and a transverse inclined plate, and the angle between the longitudinal inclined plate and the transverse inclined plate is 150°; the longitudinal inclined plate is joined to the top plate of the reactor, and the horizontal angle is 60°; the horizontal angle between the transverse inclined plate is 30°; Wherein, the combined inclined plate II is composed of a longitudinal inclined plate and a transverse inclined plate, and the angle between the longitudinal inclined plate and the transverse inclined plate is 150°; the longitudinal inclined plate is joined to the bottom of the reactor main body, the horizontal angle is 60°, and the horizontal inclined plate is 30°; the width of the gap between the combined inclined plate II and the combined inclined plate I is 2-10 cm, and the height of the edge of the transverse inclined plate in the combined inclined plate II is lower than the height of the outlet pipe by 3-15 cm.