An anaerobic reactor

Abstract

The present invention discloses an anaerobic reactor, comprising a water inlet system, an anaerobic reaction tank, a separation tank and a water collection system. The anaerobic reaction tank is connected to the water inlet system, a sludge bed is provided at the bottom of the anaerobic reaction tank, and a degassing system is provided at the top of the anaerobic reaction tank to remove biogas in the wastewater. The separation tank is arranged below the anaerobic reaction tank, and the separation tank comprises a tank body and a filler, and the tank body is connected to the top of the anaerobic reaction tank so that the wastewater from which the biogas is removed enters the tank body. The filler is arranged in the tank body, and a corrugated channel for water flow to pass through in a vertical direction is formed in the filler. The water collection system is connected to the top of the tank body, and is used to discharge the wastewater passing through the corrugated channel. The above-mentioned anaerobic reactor can realize the three-phase separation of gas, solid and liquid in the wastewater, and has a simple structure, is easy to maintain and has a low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of anaerobic biological treatment, in particular to an anaerobic reactor. Background Art

[0002] As we all know, during anaerobic biological treatment, sludge generally forms into two forms: flocculent sludge and granular sludge. Granular sludge, with its larger particle size and higher density, has a higher settling rate and separation efficiency. Therefore, reactors using granular sludge can treat more pollutants per unit volume and time, making them highly regarded.

[0003] Currently, the main types of anaerobic reactors for granular sludge include UASB, EGSB, and IC. The core structure of these is the three-phase separator. The basic principle of a three-phase separator is to separate gas, solid, and liquid by utilizing the different densities. A three-phase separator generally consists of multiple layers of herringbone plates with an outlet pipe at the top. Gases generated by the anaerobic reaction are discharged through the outlet pipe, while liquid and solids are separated by collision between the plates.

[0004] However, although the above three-phase separator can realize gas, solid and liquid separation, it has a complex structure, requires huge investment, is inconvenient to install, and has high maintenance costs. Summary of the Invention

[0005] Based on this, it is necessary to provide an anaerobic reactor to address the problems of complex structure, huge investment and high maintenance cost of the three-phase separator of the anaerobic reactor.

[0006] An anaerobic reactor, comprising:

[0007] Water inlet system;

[0008] An anaerobic reaction tank is connected to the water inlet system, a sludge bed is provided at the bottom of the anaerobic reaction tank, and a degassing system is provided on the top of the anaerobic reaction tank to remove methane in the wastewater;

[0009] a separation tank arranged below the anaerobic reaction tank, the separation tank comprising a tank body and a filler, the tank body being in communication with the top of the anaerobic reaction tank so that wastewater from which biogas has been removed can enter the tank body, the filler being disposed within the tank body, and having a corrugated channel formed therein for water to flow through in a vertical direction; and

[0010] The water collection system is connected to the top of the tank body and is used to discharge the waste water passing through the corrugated channel.

[0011] In one embodiment, the degassing system includes an air duct, a fan and a degassing pipe, the fan is installed on the air duct, the degassing pipe is immersed in the wastewater, one end of the air duct is located in the gas area in the anaerobic reaction tank, and the other end of the air duct is connected to the degassing pipe, and air distribution holes are opened on the side wall of the degassing pipe.

[0012] In one embodiment, the degassing system includes a water suction pipe, a suction pump and a nozzle, the suction pump is installed on the water suction pipe, one end of the water suction pipe is immersed in the wastewater, and the nozzle is installed on the other end of the water suction pipe.

[0013] In one embodiment, the packing includes a plurality of annular packing sheets, which are concentric and arranged in sequence from the inside to the outside, and the inner and outer sides of the packing sheets are provided with corrugations in the vertical direction.

[0014] In one embodiment, the filler sheet is bent in a vertical direction to form the corrugations.

[0015] In one embodiment, the separation tank further comprises a water inlet cylinder, which is arranged at the center of the filler, and the bottom of the water inlet cylinder is arranged upward.

[0016] In one embodiment, the bottom of the water inlet cylinder and the top of the tank body are both connected to an air outlet pipe, and the air outlet pipe is connected to the top of the anaerobic reaction tank.

[0017] In one embodiment, a pH meter is provided in the tank.

[0018] In one embodiment, a sludge return system is further included, and the sludge return system is used to return the sludge particles separated by the separation tank to the anaerobic reaction tank.

[0019] In one embodiment, a recirculation zone and a settling zone are provided in the anaerobic reaction tank. The sludge particles flow back into the recirculation zone, pass through the degassing system to remove biogas and increase potential energy through gas lift, and then enter the settling zone to settle and flow into the sludge bed.

[0020] The above anaerobic reactor has at least the following advantages:

[0021] Sewage enters the anaerobic reaction tank from the bottom through the water inlet system, and after being purified by the sludge bed, it rises into the upper area. The degassing system removes the methane in the wastewater, and then the wastewater containing sludge particles enters the separation tank. When the wastewater passes through the corrugated channel, the water flow and flocculated sludge will turn and pass through. When the granular sludge hits the turn, it will collide with the folded surface under the action of inertia, thereby slowing down the rising speed, and gradually separating from the effluent, and finally sliding to the bottom of the tank body to achieve solid-liquid separation. At the same time, the separation tank is arranged below the anaerobic reaction tank, so that the pressure in the separation tank can reach 2-3 standard atmospheric pressures. There is enough pressure difference between the two to dissolve the methane generated by the sludge secondary during the separation process in time. The anaerobic reactor of the present invention can realize the three-phase separation of gas, solid and liquid in wastewater, and has a simple structure, is easy to maintain, and has low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present invention, the following briefly introduces the drawings required for use in the specific embodiments. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0023] Figure 1 Schematic diagram of the structure of an anaerobic reactor in one embodiment;

[0024] Figure 2 for Figure 1 A schematic diagram of another embodiment of the degassing system;

[0025] Figure 3 for Figure 1 A schematic diagram of another embodiment of the sludge return system;

[0026] Figure 4 for Figure 1 Schematic diagram of the concentric arrangement of the filler sheets.

[0027] Reference numerals:

[0028] 10-water inlet system, 12-water inlet pipe, 14-water inlet pump, 20-anaerobic reaction tank, 21-sludge bed, 22-water outlet pipe, 23-biogas pipe, 24-manhole, 25-stripping area, 26-water outlet area, 27-connecting pipe, 28-recirculation area, 29-static settling area, 30-separation tank, 31-tank body, 312-mud hopper, 32-filler, 322-corrugated channel, 324-filler sheet, 33-water inlet cylinder, 34-air outlet pipe, 35-pH meter, 40-water collection system, 42-water collecting pipe, 44-drain pipe, 46-liquid level control box, 48-drain valve, 50-degassing system, 521-air duct, 522-fan, 523-degassing pipe, 541-water suction pipe, 542-suction pump, 543-nozzle, 60-sludge return system, 62-return pipe, 64-return pump. DETAILED DESCRIPTION

[0029] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in this specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] See also Figure 1 The anaerobic reactor in one embodiment includes a water inlet system 10 , an anaerobic reaction tank 20 , a separation tank 30 and a water collection system 40 .

[0033] The anaerobic reaction tank 20 is connected to an inlet system 10, which is used to introduce untreated sewage into the anaerobic reaction tank 20. In one embodiment, the inlet system 10 includes an inlet pipe 12 and an inlet pump 14. The inlet pump 14 is mounted on the inlet pipe 12, which extends to the bottom of the anaerobic reaction tank 20. An outlet pipe 22 is provided within the sludge bed 21 of the anaerobic reaction tank 20. The outlet pipe 22 is connected to the inlet pipe 12 and has multiple outlet holes on its sidewall to ensure even distribution of the sewage within the sludge bed 21.

[0034] The bottom of the anaerobic reaction tank 20 is provided with a sludge bed 21. The sewage is purified through the sludge bed 21 and then rises to the upper area. Due to the continuous generation of methane in the anaerobic reaction tank 20 to form a stirring effect, the wastewater in the upper area contains a certain amount of sludge particles.

[0035] A degassing system 50 is installed at the top of the anaerobic reaction tank 20. This system removes dissolved gases, such as methane, from the wastewater, allowing the full release of excess dissolved gases from the liquid rising from the bottom of the anaerobic reaction tank 20. A methane pipe 23 is installed at the top of the anaerobic reaction tank 20 to discharge the methane generated during the purification process. A manhole 24 is also provided at the top of the anaerobic reaction tank 20 to facilitate maintenance of the anaerobic reaction tank 20.

[0036] In one embodiment, the degassing system 50 includes an air duct 521, a fan 522, and a degassing pipe 523. The fan 522 is located outside the anaerobic reaction tank 20 and is mounted on the air duct 521. One end of the air duct 521 is located within the gas area of ​​the anaerobic reaction tank 20, and the other end of the air duct 521 is connected to the degassing pipe 523. The degassing pipe 523 is immersed in the wastewater and has air distribution holes formed on its sidewall. The fan 522 can draw biogas from the anaerobic reaction tank 20 and then discharge the biogas through the air distribution holes in the degassing pipe 523, thereby removing the biogas dissolved in the wastewater.

[0037] Based on the above embodiment, the anaerobic reaction tank 20 is further provided with a stripping zone 25 and a water outlet zone 26. The degassing pipe 523 is located in the stripping zone 25. The rising wastewater first enters the stripping zone 25, where methane is uniformly removed from the wastewater. This ensures the degassing system 50's efficiency in removing methane from the wastewater. The degassed wastewater then enters the water outlet zone 26, carrying a small amount of sludge particles.

[0038] It should be understood that in other embodiments, the degassing pipe 523 can also be arranged in the outlet area 26 to remove methane from the wastewater. Alternatively, the degassing pipe 523 can be directly immersed in the wastewater, and the degassed wastewater enters the outlet area 26.

[0039] Please also refer to Figure 2 In another embodiment, the degassing system 50 may also have other structures. Specifically, the degassing system 50 includes a suction pipe 541, a suction pump 542, and a nozzle 543. The suction pump 542 is located outside the anaerobic reaction tank 20. The suction pump 542 is installed on the suction pipe 541. One end of the suction pipe 541 is immersed in the wastewater. The other end of the suction pipe 541 is installed with a nozzle 543. The nozzle 543 is located within the gas area of ​​the anaerobic reaction tank 20 and directly above the water outlet area 26. The suction pump 542 can extract wastewater and then spray it out from the nozzle 543. During the spraying process, biogas and other substances dissolved in the wastewater are released and discharged, thereby removing biogas from the wastewater.

[0040] Separation tank 30 is positioned below anaerobic reaction tank 20, creating a significant height difference between the two. This utilizes the principle of communicating vessels to preserve the potential energy of the effluent from the original equipment without incurring additional compression work or head loss, while achieving excellent treatment and separation results. In one embodiment, separation tank 30 is vertically positioned at least 20 meters below anaerobic reaction tank 20.

[0041] The separation tank 30 includes a tank body 31 and a filler 32. The tank body 31 is connected to the top of the anaerobic reaction tank 20 so that the wastewater from which the biogas is removed can enter the tank body 31. The filler 32 is disposed in the tank body 31 and has a corrugated channel 322 formed therein for water to flow through in a vertical direction.

[0042] After degassing within the anaerobic reaction tank 20, wastewater containing a certain amount of sludge particles enters the tank body 31. The wastewater then gradually rises through the corrugated channel 322 and enters the top of the tank body 31. As the water flow, mixed with sludge particles, passes through the corrugated channel 322, it makes a turn. When the sludge particles hit the turn, their inertia causes them to collide with the folded surface, slowing their ascent. They gradually separate from the effluent and eventually slide to the bottom of the tank body 31. In comparison, flocculent sludge has smaller particles and a lower density than granular sludge. Due to their smaller particle mass and slower settling velocity, they are not decelerated by collisions when passing through the corrugated channel 322 and are instead carried away with the effluent. Therefore, the rising flow rate in the controlled section is 1-5 m / h, which can completely intercept sludge particles with a diameter of less than 0.2 mm, eliminate flocculent sludge, and increase the granular sludge cultivation rate.

[0043] In one embodiment, the tank body 31 is connected to the top of the anaerobic reaction tank 20 via a connecting pipe 27. Specifically, one end of the connecting pipe 27 is connected to the outlet area 26 of the anaerobic reaction tank 20, and the other end is connected to the bottom of the tank body 31. A flow stabilization valve is provided on the connecting pipe 27 to automatically control the flow rate within the connecting pipe 27. This prevents a sudden increase in the water inflow to the separation tank 30 when sludge recirculation is activated or the inflow to the anaerobic tank increases, thereby affecting the rising flow rate and mud-water separation efficiency in the separation tank 30. The bottom of the tank body 31 is recessed to form a mud hopper 312, which is used to accommodate separated sludge particles.

[0044] Please also refer to Figure 4 In one embodiment, the packing 32 includes a plurality of annular packing sheets 324, which are arranged sequentially from the inside out and concentrically and coaxially. The packing sheets 324 are vertically corrugated on both the inside and outside, forming a corrugated channel 322 between adjacent layers of packing sheets 324. Adjacent packing sheets 324 are spaced uniformly apart, have the same vertical waveform, and have the same phase angle, so that the width of the outlet channel remains constant.

[0045] Specifically, the filler sheet 324 is bent in the vertical direction to form corrugations, thereby forming corrugations on both the inner and outer sides. Of course, in other embodiments, corrugated plates can also be installed on both the inner and outer sides of the filler sheet 324 to form the corrugated channel 322.

[0046] Traditional high-efficiency sedimentation separations often use inclined plate packing, but these can only be installed in rectangular tanks. Due to the operating pressure of the separation tank 30, the tank 31 of the present invention adopts a circular structure, which is pressure-resistant and simple. Therefore, the inclined plate / inclined tube packing used in traditional sedimentation separations cannot be installed in circular equipment.

[0047] In this invention, the packing sheets 324 are arranged in multiple concentric circles, each with its own curvature. These sheets are produced using a mold. To facilitate production, transportation, and installation, each packing sheet 324 is designed as multiple pieces and assembled on-site. Furthermore, the corrugated sheet has a strong resistance to bending, which reduces material consumption.

[0048] Furthermore, the bevel of the corrugated packing sheet 324 is short, only 5-15 cm, and is injection molded in one step, with no welds and a smooth surface. This makes it less likely to deform during installation, significantly reducing sludge adhesion and thus preventing sludge accumulation and clogging in the gaps between the packing sheets 32. Conventional inclined plate packing, on the other hand, has a bevel length of 100 cm or even 150 cm. This often deforms during installation or during sewage treatment operations, preventing the separated sludge from properly draining back into the sludge hopper 312.

[0049] It is understood that in other embodiments, the corrugated channel 322 may be formed in the filler 32 by other structures, as long as the corrugated channel 322 can be formed. For example, the corrugated channel 322 may be formed by opening holes in the filler 32.

[0050] In addition to the above embodiment, the separation tank 30 further includes a water inlet cylinder 33, which is disposed at the center of the filler 32, with the bottom of the water inlet cylinder 33 facing upward, and the connecting pipe 27 extends into the water inlet cylinder 33. Wastewater containing sludge particles in the anaerobic reaction tank 20 first enters the water inlet cylinder 33. The water inlet cylinder 33 can achieve downward annular water distribution, ensuring that the wastewater evenly enters the corrugated channel 322, thereby improving the separation effect.

[0051] In addition to the above embodiment, an air outlet pipe 34 is further connected to the bottom of the water inlet cylinder 33 and the top of the tank body 31. The air outlet pipe 34 is connected to the top of the anaerobic reaction tank 20. During the process of wastewater containing sludge particles entering the water inlet cylinder 33 and during the solid-liquid separation of the wastewater, some biogas may escape. The air outlet pipe 34 can collect the escaped gas into the anaerobic reaction tank 20 and discharge it through the biogas pipe 23 of the anaerobic reaction tank 20.

[0052] The pressure at the top of the anaerobic reaction tank 20 is very close to that of the external atmosphere, generally only 2000-3000 Pa above normal atmospheric pressure, approximately 2%-3% of standard atmospheres. The pressure within the separation tank 30 can reach 2-3 standard atmospheres. As is well known, the solubility of gases is related to pressure. When pressure increases, although gas exists in the liquid, it is in an unsaturated dissolved state and will not be released. Therefore, it will not affect the solid-liquid separation in the separation tank 30. The sufficient pressure difference between the two allows for the timely dissolution of the biogas generated by the sludge during the separation process.

[0053] In one embodiment, a pH meter 35 is provided in the tank 31 to detect the pH value of the wastewater. The pH meter 35 can accurately control the gas content of the liquid in the separation tank 30 so that it can be refluxed before reaching saturation.

[0054] Specifically, the ratio of carbon dioxide to methane produced by anaerobic organisms is generally between 1:1 and 1:2. The solubility of carbon dioxide in water affects the pH of the water, causing it to drop. A pH meter 35 is installed in the separation tank 30. This pH value can be used to calculate the carbon dioxide concentration within the separation tank 30. Before the gas solubility reaches saturation, the settled sludge at the bottom of the tank is recirculated, reducing the gas production rate within the separation tank 30. This allows the entire reactor to be operated automatically, ensuring high stability and reliability.

[0055] The water collection system 40 is connected to the top of the tank body 31 and is used to discharge wastewater passing through the corrugated channel 322. In one embodiment, the water collection system 40 includes a water collection pipe 42, a drain pipe 44, and a liquid level control box 46. The water collection pipe 42 is installed in the separation tank 30 and arranged in an annular direction along the circumference of the packing 32, with the center of the water collection pipe 42 on the central axis of the packing 32. The sidewall of the water collection pipe 42 is provided with multiple water inlet holes, through which wastewater rising from the corrugated channel 322 can enter the water collection pipe 42.

[0056] A drain pipe 44 is connected to the water collection pipe 42, and a liquid level control box 46 is mounted on the drain pipe 44. The liquid level control box 46 controls the height of the wastewater discharged. Wastewater collected in the water collection pipe 42 flows into the drain pipe 44, where it is discharged. In one embodiment, a drain valve 48 is connected to the drain pipe 44, which utilizes the pressure difference between high and low to drain the wastewater and prevent clogging of the water inlet of the water collection pipe 42.

[0057] In one embodiment, the anaerobic reactor further includes a sludge return system 60 . The sludge return system 60 can return the sludge particles deposited in the separation tank 30 to the anaerobic reaction tank 20 when the sludge particles accumulate to a certain extent.

[0058] In addition to the above embodiment, the sludge return system 60 includes a return pipe 62 and a return pump 64. One end of the return pipe 62 is connected to the sludge hopper 312 at the bottom of the tank 31, and the other end of the return pipe 62 is connected to the sludge bed 21 within the anaerobic reaction tank 20. The return pump 64 is mounted on the return pipe 62 and sucks sludge particles from the sludge hopper 312 into the sludge bed 21 within the anaerobic reaction tank 20. A drain valve 48 is connected to the return pipe 62 to prevent clogging of the sludge return system 60.

[0059] Please also refer to Figure 3 On the basis of the above embodiment, a recirculation zone 28 and a static settling zone 29 are further provided in the anaerobic reaction tank 20. The sludge particles flow back into the recirculation zone 28. A degassing pipe 523 is also provided in the recirculation zone 28 so that the degassing system 50 removes the methane in the recirculated particles and lifts them to increase their potential energy. Finally, the sludge particles flow into the static settling zone 29, settle in the static settling zone 29, and finally flow into the sludge bed 21, thereby ensuring the quality of the recirculated sludge particles.

[0060] The working process of the above anaerobic reactor is specifically as follows:

[0061] The sewage enters the bottom of the anaerobic reaction tank 20 through the water inlet system 10, and after being purified by the sludge bed 21, it rises into the upper area. At this time, the tank continuously generates biogas stirring, and the sewage in the upper area also contains a certain amount of granular sludge.

[0062] The wastewater first passes through the degassing system 50 to remove large amounts of dissolved gases. The degassed wastewater, carrying a small amount of sludge, then enters the outlet area 26 and flows through the connecting pipe 27 into the separation tank 30 located at the lower part of the tank body. A flow-stabilizing valve is installed on the connecting pipe 27 to automatically control the flow rate within the connecting pipe 27. This prevents a sudden increase in the water inflow to the separation tank 30 when sludge recirculation is activated or the water flow rate of the anaerobic tank increases, which could affect the rising flow rate in the separation tank 30 and the mud-water separation effect.

[0063] The mud-water mixture first enters the water inlet 33 at the center of the separation tank 30, achieving circumferential water distribution. The mixture then rises through the corrugated channel 322 for separation. The separated granular sludge enters the sludge hopper 312 and is returned to the anaerobic reaction tank 20 via the sludge return system 60. The separated clean water (including fine flocculent sludge) enters the water collection pipe 42, where it is collected by the water collection system 40 and discharged.

[0064] The above-mentioned anaerobic reactor can realize the three-phase separation of gas, solid and liquid in wastewater, and has a simple structure, is easy to maintain and has low cost.

[0065] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. An anaerobic reactor, It is characterized in that include: Water inlet system; An anaerobic reaction tank connected to the water inlet system, a sludge bed is provided at the bottom of the anaerobic reaction tank, and a degassing system is provided at the top of the anaerobic reaction tank to remove methane in the wastewater; A separation tank is arranged below the anaerobic reaction tank, and the separation tank is at least 20 meters lower than the anaerobic reaction tank in the vertical direction, so that a pressure difference is formed between the separation tank and the anaerobic reaction tank to dissolve the biogas generated by the sludge during the separation process; the separation tank includes a circular tank body and a filler, the tank body is connected to the top of the anaerobic reaction tank, so that the wastewater from which the biogas is removed can enter the tank body, the filler is arranged in the tank body, and a corrugated channel is formed in the filler along the vertical direction for water flow to pass through; and A water collection system connected to the top of the tank body, the water collection system being arranged higher than the separation tank and used for discharging waste water passing through the corrugated channel; The packing comprises a plurality of annular packing sheets, which are concentric and arranged in sequence from the inside to the outside, and the inner and outer sides of the packing sheets are provided with corrugations in the vertical direction to form the corrugated channel between two adjacent layers of the packing sheets; the spacing between two adjacent packing sheets is the same, and they are the same waveform in the vertical direction, have the same phase angle, and the width of the water outlet channel remains unchanged; When the water flow mixed with granular sludge passes through the corrugated channel, the water flow will turn and pass through. When the granular sludge hits the turn, it will collide with the folded surface under the action of inertia, thereby slowing down the rising speed, and gradually separating from the effluent, and finally sliding to the bottom of the tank body; the particle size and density of flocculent sludge are smaller than those of granular sludge. Because of its smaller particle mass and slower static sedimentation speed, it will not be decelerated due to collision when passing through the corrugated channel, and will be carried out with the effluent.

2. The anaerobic reactor according to claim 1, It is characterized in that The degassing system includes an air duct, a fan and a degassing pipe, wherein the fan is installed on the air duct, the degassing pipe is immersed in the wastewater, one end of the air duct is located in the gas area in the anaerobic reaction tank, the other end of the air duct is connected to the degassing pipe, and air distribution holes are opened on the side wall of the degassing pipe.

3. The anaerobic reactor according to claim 1, It is characterized in that The degassing system comprises a water suction pipe, a suction pump and a nozzle. The suction pump is installed on the water suction pipe. One end of the water suction pipe is immersed in the wastewater, and the nozzle is installed on the other end of the water suction pipe.

4. The anaerobic reactor according to claim 1, It is characterized in that The filler sheet is bent in a vertical direction to form the corrugations.

5. The anaerobic reactor according to claim 1, It is characterized in that The separation tank further comprises a water inlet cylinder, which is arranged at the center of the filler and has a bottom facing upward.

6. The anaerobic reactor according to claim 5, It is characterized in that The bottom of the water inlet cylinder and the top of the tank body are both connected with an air outlet pipe, and the air outlet pipe is connected to the top of the anaerobic reaction tank.

7. The anaerobic reactor according to claim 6, It is characterized in that A pH meter is arranged in the tank.

8. The anaerobic reactor according to claim 1, It is characterized in that It also includes a sludge return system, which is used to return the sludge particles separated by the separation tank to the anaerobic reaction tank.

9. The anaerobic reactor according to claim 8, It is characterized in that The anaerobic reaction tank is provided with a reflow zone and a static settling zone. The sludge particles reflow into the reflow zone, pass through the degassing system to remove biogas and gas lift to increase potential energy, and then enter the static settling zone to statically settle and flow into the sludge bed.

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