Anaerobic reactor and method of using the same

Abstract

The application discloses an anaerobic reactor and a method for using the same. The anaerobic reactor comprises a reactor, an internal space of which is divided into a reaction zone at a lower portion and a sedimentation zone at an upper portion, a water inlet distribution device is arranged at the bottom of the reaction zone, the water inlet distribution device is connected with a water storage tank through a water inlet pipe, a water outlet collecting device is arranged at the top of the sedimentation zone, a plurality of three-phase separators are arranged between the reaction zone and the sedimentation zone, the top outlet of each three-phase separator is connected with a gas lifting pipe, one layer of flow guide device or more than two layers of flow guide devices at different heights are arranged between the water inlet distribution device and the plurality of three-phase separators, each layer of flow guide device comprises a plurality of flow state flow guides which are arranged in parallel and at intervals in the transverse direction, a flow guide cavity which is wide at the lower portion and narrow at the upper portion in the transverse direction is formed in the inside of each flow state flow guide, and an opening is formed at the top of the flow guide cavity, a gas-liquid separation tank is arranged above the reactor, the gas-liquid separation tank is connected with the gas lifting pipe and is provided with a gas outlet at the top, and a reflux water distribution device is arranged at the bottom of the reaction zone and is connected with the bottom of the gas-liquid separation tank through an upwardly extending settling pipe.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wastewater treatment, and relates to an anaerobic reactor and a use method for treating wastewater by using the anaerobic reactor. BACKGROUND

[0002] Biological treatment technology is one of the most commonly used wastewater treatment technologies. It converts organic matter in wastewater into simple inorganic matter, methane, carbon dioxide, etc. through the metabolism of microorganisms, or converts ammonia nitrogen in wastewater into nitrate nitrogen, or reduces nitrate nitrogen in wastewater to nitrogen, so as to achieve the purpose of harmless.

[0003] According to whether the microorganisms need oxygen supply, biological treatment technology is divided into aerobic biological treatment technology and anaerobic biological treatment technology.

[0004] Anaerobic biological technology refers to a technology for treating wastewater by using anaerobic microorganisms, such as converting organic matter in wastewater into methane, carbon dioxide, etc. through the metabolism of anaerobic microorganisms, so as to make it harmless. Or using the reduction of denitrifying bacteria to remove nitrate nitrogen in wastewater. The representative process of anaerobic biological treatment technology is UASB process. The UASB process is currently mainly used for the treatment of organic wastewater, but if the anaerobic bacteria are replaced by denitrifying bacteria, it can be used for denitrification treatment of nitrate nitrogen wastewater.

[0005] When the UASB process is used for the treatment of organic wastewater and nitrate nitrogen wastewater, the mixing of wastewater and microorganisms is realized by the hydraulic stirring action of the influent and the gas stirring action formed by the metabolic products of microorganisms, such as methane, carbon dioxide and nitrogen. However, in practice, the stirring action generated by the two is relatively weak, and cannot realize the sufficient mixing and contact of microorganisms and wastewater, which affects the mass transfer efficiency and further reduces the treatment efficiency of wastewater.

[0006] In addition, the metabolic products of microorganisms, i.e. gas, often adheres to the surface of microorganisms in the form of micro-bubbles, increases the buoyancy of microorganisms, and then floats up to form a large amount of floating sludge in the upper part of the UASB reaction zone. The generation of floating sludge makes the microorganisms stay in the upper part of the reaction zone, which reduces the sufficient contact of microorganisms and wastewater and affects the mass transfer efficiency. At the same time, the generation of a large amount of floating sludge is easy to block the three-phase separator and affect its normal operation.

[0007] If the bubbles adhering to the surface of microorganisms cannot be separated from the microorganisms before entering the three-phase separator, it is also easy to cause the microorganisms to enter the sedimentation zone and be taken away with the effluent, causing the phenomenon of sludge running.

[0008] At the same time, the existing anaerobic reactor has difficulty in forming granular sludge and the proportion of granular sludge is relatively low.

[0009] From the process requirements, the gas produced by microbial metabolism is separated from the microorganisms in time, which is the most ideal state. SUMMARY

[0010] To solve the problems of the anaerobic biological technology in the prior art, the purpose of the present application is to provide an anaerobic reactor and a use method thereof, which can significantly improve the mass transfer efficiency of the reactor, thereby improving the treatment efficiency, without easily forming floating sludge and promoting sludge granulation, and can also improve the phenomenon of sludge running out of the effluent.

[0011] To achieve the above-mentioned purpose, an embodiment of the present application provides an anaerobic reactor, which comprises:

[0012] a water storage tank;

[0013] a reactor, the internal space of which is divided into a reaction zone at the lower part and a sedimentation zone at the upper part, the bottom of the reaction zone is provided with a water inlet distribution device, the water inlet distribution device is connected in communication with the water storage tank through a water inlet pipe, and the top of the sedimentation zone is provided with a water outlet collecting device;

[0014] a plurality of three-phase separators arranged between the reaction zone and the sedimentation zone, the top outlet of each three-phase separator is connected in communication with a gas lift pipe;

[0015] one flow guide device or more than two flow guide devices at different heights arranged between the water inlet distribution device and the plurality of three-phase separators, each flow guide device comprises a plurality of flow state flow guides arranged in parallel and at intervals in the transverse direction, the inside of each flow state flow guide forms a flow guide cavity which is wide at the lower part and narrow at the upper part in the transverse direction, and the top of the flow guide cavity is provided with an opening;

[0016] a gas-liquid separation tank arranged above the reactor, which is connected in communication with the gas lift pipe and is provided with a gas outlet at the top; and

[0017] a reflux water distribution device arranged at the bottom of the reaction zone and connected in communication with the bottom of the gas-liquid separation tank through an upwardly extending settling pipe.

[0018] Preferably, the anaerobic reactor further comprises:

[0019] a sampling pipe having a sampling port extending to the reaction zone, the sampling pipe being provided with a valve controlling the opening and closing of the sampling port; and

[0020] a pH probe arranged on the sampling pipe and located downstream of the valve.

[0021] Preferably, the anaerobic reactor further comprises:

[0022] An acid adding device comprising an acid storage tank connected to the water storage tank or the water inlet pipe through an acid adding pipe, and a first dosing pump arranged on the acid adding pipe;

[0023] A control device connected to the pH probe and the first dosing pump, and configured to control the opening and closing of the first dosing pump according to the detection result of the pH probe.

[0024] Preferably, the sampling pipe has multiple sampling ports extending to different heights of the reaction zone respectively, and is provided with multiple valves corresponding to the multiple sampling ports respectively;

[0025] The control device is further connected to each valve, and controls all valves to be opened one by one in turn every interval.

[0026] Preferably, the multiple three-phase separators are provided with the sampling ports between the uppermost layer of the flow guide devices and the lowermost layer of the flow guide devices, between any two adjacent layers of the flow guide devices, and below the lowermost layer of the flow guide devices.

[0027] Preferably, the anaerobic reactor further comprises a sampling backflow pipe connected between the sampling pipe and the gas-liquid separation tank.

[0028] Preferably, the sampling backflow pipe has a gas stripping pipe section extending from bottom to top, and the bottom end of the gas stripping pipe section is connected to a gas supply device; or, a backflow pump is arranged in the sampling backflow pipe.

[0029] Preferably, the water inlet pipe is provided with a water inlet pump, a flow meter, and a nitrate nitrogen measuring instrument.

[0030] The anaerobic reactor further comprises:

[0031] A carbon source supplementing device comprising a carbon source storage tank connected to the water inlet pipe through a carbon adding pipe, and a second dosing pump arranged on the carbon adding pipe.

[0032] A control device connected to the water inlet pump, the flow meter, the nitrate nitrogen measuring instrument, and the second dosing pump, and configured to control the flow ratio of the second dosing pump and the water inlet pump according to the measurement result of the nitrate nitrogen measuring instrument.

[0033] Preferably, the anaerobic reactor further comprises:

[0034] A flow collecting device arranged at the top of the reaction zone and below the three-phase separators;

[0035] A backflow water distribution device arranged at the bottom of the reaction zone and connected to the flow collecting device through a backflow pipe; and

[0036] A driving pump is arranged on the return pipe and used to drive the flow of fluid from the collecting device to the return water distribution device through the return pipe.

[0037] Preferably, the anaerobic reactor further comprises a gas distribution device arranged at the bottom of the reaction zone, which is communicated to the upper part of the gas-liquid separation tank through a gas return pipe;

[0038] A second driving pump is arranged on the gas return pipe, which is used to drive the flow of gas from the gas-liquid separation tank to the gas distribution device through the gas return pipe.

[0039] Preferably, the gas outlet of the gas-liquid separation tank is provided with a gas discharge pipe, the end of which extends into the liquid seal device.

[0040] Preferably, each of the flow state flow guides has its longitudinal two ends respectively connected with the side wall of the reactor, and has one or more vertical partition plates arranged inside to separate the flow guide cavity into multiple unit cells arranged side by side in the longitudinal direction.

[0041] Each of the flow state flow guides comprises two flow guide plates arranged in mirror symmetry in the transverse direction, each of the flow guide plates having an upper inclined plate and a lower vertical plate.

[0042] Preferably, the multiple three-phase separators are divided into:

[0043] Multiple lower three-phase separators arranged side by side and spaced apart in the transverse direction; and,

[0044] Multiple upper three-phase separators arranged alternately staggered with the lower three-phase separators in the transverse direction, each of the upper three-phase separators comprising an inner structure and an outer structure, the inner structure having an open lower end and an open upper end inside, and the open lower end of the inner structure completely covering the gap between the adjacent two lower three-phase separators, and the outer structure being wrapped outside the inner structure and forming a return gap with the inner structure.

[0045] To achieve the above object, an embodiment of the present application provides a use method of an anaerobic reactor, comprising the following steps:

[0046] Adding denitrifying bacteria activated sludge into the reaction zone;

[0047] Collecting the nitrate nitrogen-containing wastewater to be treated into the water storage tank, then conveying the wastewater into the reactor through the water inlet pipe, and uniformly distributing the wastewater at the bottom of the reaction zone through the water inlet water distribution device;

[0048] Gradually rising the wastewater from the bottom of the reaction zone, and reducing the nitrate nitrogen in the wastewater to nitrogen gas through the metabolism of denitrifying bacteria in the reaction zone;

[0049] The wastewater passes through the three-phase separator, and is separated into gas, liquid and solid under the action of the three-phase separator.

[0050] The wastewater enters the sedimentation zone for sedimentation separation and clarification, and the purified water is collected by the water outlet collecting device and discharged.

[0051] Preferably, the use method further comprises the steps of:

[0052] The concentration of nitrate nitrogen in the wastewater in the water inlet pipe is detected in real time, and the amount of carbon source added into the water inlet pipe is adjusted in real time according to the concentration.

[0053] Preferably, the use method further comprises the steps of:

[0054] The pH values of the wastewater at at least two heights in the reaction zone are detected in sequence every interval, and an acid solution is added into the water inlet pipe or the water storage tank according to the detection results.

[0055] To achieve the above-mentioned purposes, an embodiment of the present application provides a use method of an anaerobic reactor, comprising the following steps:

[0056] Anaerobic sludge is added into the reaction zone;

[0057] The organic wastewater to be treated is collected into the water storage tank, and then the wastewater is transported into the reactor through the water inlet pipe and uniformly distributed at the bottom of the reaction zone through the water inlet distribution device;

[0058] The wastewater gradually rises from the bottom of the reaction zone, and the organic matter in the wastewater is converted into methane and carbon dioxide through the metabolism of anaerobic bacteria in the reaction zone;

[0059] The wastewater passes through the three-phase separator, and is separated into gas, liquid and solid under the action of the three-phase separator;

[0060] The wastewater enters the sedimentation zone for sedimentation separation and clarification, and the purified water is collected by the water outlet collecting device and discharged.

[0061] Compared with the prior art, the present application has the beneficial effect that when the anaerobic reactor is used to treat nitrate nitrogen wastewater or organic wastewater, the dispersed gas generated in the reaction process, such as nitrogen, carbon dioxide, methane and the like, is gathered by the flow guide device and then released in a concentrated manner, so that more intense pneumatic stirring effect is generated. The strong pneumatic stirring effect can make the wastewater and the microorganisms fully mixed and contacted, improve the mass transfer efficiency, and thus improve the wastewater treatment efficiency; at the same time, the strong pneumatic stirring effect can also make the bubbles adhered to the surface of the microorganisms timely separated from the microorganisms, so that the floating sludge is not formed again, and the phenomenon of mud running out of the water is also obviously improved; in addition, the structure formed by the flow guide device arranged in the reaction zone can change the flow state of the wastewater in the reaction zone, that is, under the action of the flow guide device, the flow state of the wastewater formed in the reaction zone can promote and accelerate the formation of the granular sludge. BRIEF DESCRIPTION OF DRAWINGS

[0062] Figure 1 Fig. 1 is a structural schematic view of the anaerobic reactor of the present application embodiment 1;

[0063] Figure 2 Fig. 2 is a three-dimensional structural schematic view of the flow state flow guide in the anaerobic reactor of the present application embodiment 1;

[0064] Figure 3 Fig. 3 is a front side view of the flow state flow guide in the anaerobic reactor of the present application embodiment 1;

[0065] Figure 4 Fig. 4 is a schematic view of the arrangement of the plurality of three-phase separators in the anaerobic reactor of the present application embodiment 1;

[0066] Figure 5 Fig. 5 is a structural schematic view of the anaerobic reactor of the present application embodiment 2.

[0067] BRIEF DESCRIPTION OF DRAWINGS

[0068] Anaerobic reactor, 100, 200; Reactor, 10, 20; Reaction zone, 10a, 20a; Sedimentation zone 10b, 20b; Effluent collection device, 101, 201; Water storage tank, 11, 21; Inlet pipe, 110, 210; Inlet water pump, 111, 211; Flowmeter, 112, 212; Nitrate nitrogen analyzer, 113, 213; Inlet water distribution device, 114, 214; Diversion device, 12, 22; Three-phase separator, 13, 23; Gas-liquid separation tank, 14, 24; Air-lift pipe, 140, 240; Settling pipe, 141, 241; Return water distribution device, 142, 242; Exhaust port, 14a, 24a; Exhaust pipe, 243; Liquid seal device, 244; Sampling pipe, 15, 25; Sampling port, 150, 250; Valve, 151, 251; pH probe, 152, 252; Sampling return pipe, 153, 253; Bottom end of the air-lift pipe section, 153E, 253E; Gas supply device, 154, 254; Acid storage bucket, 155, 255; Chemical dosing pump, 156, 256, 161, 261; Acid addition pipe, 157, 257; Carbon source storage bucket, 16, 26; Carbon addition pipe, 162, 262; Control device, 17, 27; Return air pipe, 28; Driving pump, 281; Air distribution device, 282; Flow collection device, 294; Return water distribution device, 292; Return pipe, 29; Driving pump, 291. Detailed implementation manners

[0069] The present invention will be described in detail below in conjunction with the specific implementation manners shown in the drawings. However, these implementation manners do not limit the present invention, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these implementation manners is included in the protection scope of the present invention.

[0070] As mentioned in the background art, aiming at the problems of insufficient agitation, low mass transfer efficiency, low treatment efficiency, and easy sludge runoff and difficult formation of granular sludge in the anaerobic reactor. The present invention aims to provide an anaerobic reactor to solve the problems existing in the prior art. The present invention will be introduced in detail below with different embodiments.

[0071] Embodiment 1

[0072] Refer Figure 1 , the anaerobic reactor 100 provided in this embodiment includes a reactor 10, a water storage tank 11, a plurality of three-phase separators 13, one layer or two or more layers of diversion devices 12, a gas-liquid separation tank 14, and a return water distribution device 142.

[0073] Among them, the water storage tank 11 is used for the collection and temporary storage of wastewater, such as nitrate nitrogen wastewater or organic wastewater.

[0074] The inside space of the reactor 10 serves as a site for implementing wastewater treatment, and is roughly divided into a lower reaction zone 10a and an upper sedimentation zone 10b. The reactor 10 can have a shape of a cubic pool, a rectangular pool, a circular pool, or other shape, which is open or closed at the upper portion and has a certain height in the vertical direction. In addition, in the drawings, the reactor 10 is illustrated as having a pool bottom wall and a pool side wall having a certain thickness, but in actual implementation, the reactor 10 can also be constructed by digging a groove downward on the ground (i.e., the pool wall of the reactor 10 does not have a certain thickness).

[0075] The bottom of the reaction zone 10a is provided with a water inlet distributor 114, which can be supported and fixed on the bottom wall of the reactor 10 for easy installation and fixation. The water inlet distributor 114 is connected to the water storage tank 11 through a water inlet pipe 110, so that the wastewater in the water storage tank 11 can be delivered to the reactor 10 through the water inlet pipe 110 and distributed into the reaction zone 10a through the water inlet distributor 114.

[0076] The top of the sedimentation zone 10b is provided with a water outlet collector 101, i.e., the reactor 10 is of a bottom-inlet and top-outlet type, and the wastewater treated in the reactor 10 forms clean water (relative to the water inlet of the water inlet distributor 114), which is collected by the water outlet collector 101 at the top of the sedimentation zone 10b and finally achieves the water outlet of the anaerobic reactor 100. In the drawings, the water outlet collector 101 is illustrated as a water outlet weir, but is not limited thereto, and other water outlet structures known in the art can also be applicable.

[0077] A plurality of three-phase separators 13 are located in the reactor 10, and are specifically arranged between the reaction zone 10a and the sedimentation zone 10b. In other words, for the inside space of the reactor 10, the three-phase separators 13 serve as a boundary, and the area below the three-phase separators 13 forms the reaction zone 10a, while the area above the three-phase separators 13 forms the sedimentation zone 10b.

[0078] The top outlet of each three-phase separator 13 is connected to a gas lift pipe 140, which is connected to a gas-liquid separation tank 14 above the reactor 10. The gas-liquid separation tank 14 is provided with a gas outlet 14a at the top, and is connected to a reflux water distribution device 142 arranged at the bottom of the reaction zone 10a through a settling pipe 141 extending vertically upward from the reflux water distribution device 142 to the bottom of the gas-liquid separation tank 14. Thus, when treating wastewater, the mixed fluid formed by the water, sludge and gas in the upper part of the reaction zone 10a enters the three-phase separator 13, and the gas carrying a portion of the water enters the gas-liquid separation tank 14 upwardly through the gas lift pipe 140, and then the water and gas are separated in the gas-liquid separation tank 14, the water flows downward along the settling pipe 141 and returns to the reaction zone 10a again through the reflux water distribution device 142, that is, a first circulating loop is formed along the reaction zone 10a→three-phase separator 13→gas lift pipe 140→gas-liquid separation tank 14→settling pipe 141→reflux water distribution device 142→reaction zone 10a, and due to the water distribution of the reflux water distribution device 142 in the circulating loop, a hydraulic stirring is formed at the bottom of the reaction zone 10a, thereby promoting the mixing of wastewater and sludge.

[0079] The flow guide device 12 is arranged between the water inlet distribution device 114 and the three-phase separator 13, that is, in the reaction zone 10a; the anaerobic reactor 100 includes one layer of flow guide device 12, or more than two layers of flow guide devices 12 arranged at different heights, and two layers of flow guide devices 12 are shown in the drawings. Each layer of flow guide device 12 includes a plurality of flow state flow guides arranged in parallel and spaced apart in the transverse direction (i.e., there is a gap between adjacent two flow state flow guides); and in combination Figures 1 to 3 , the inside of each flow state flow guide forms a flow guide cavity 120 which is wide at the bottom and narrow at the top in the transverse direction, and the top of the flow guide cavity 120 is provided with an opening 1201. Thus, when treating wastewater, the gas (such as methane, nitrogen, carbon dioxide, etc. mentioned in the background art) produced by the biochemical reaction between microorganisms and pollutants in wastewater can be collected by the flow state flow guide, and then released again at the upper opening of the flow state flow guide in the form of high-density gas flow, thereby achieving strong pneumatic stirring above each layer of flow guide device 12. The strong pneumatic stirring can make the microorganisms and wastewater more fully mixed and contacted, strengthen the mass transfer efficiency, and improve the treatment efficiency. At the same time, the disturbance caused by the strong pneumatic stirring can make the bubbles attached to the surface of the microorganisms separate from the microorganisms in time, so that floating sludge is not formed.

[0080] In summary, compared with the prior art, the anaerobic reactor 100 of the present application, when treating nitrate nitrogen wastewater or organic wastewater, in addition to the conventional hydraulic stirring formed by the water distribution device 114 at the bottom of the reaction zone 10a, further utilizes the gas generated during the reaction to form pneumatic stirring by means of the flow guide device 12, and utilizes the circulation reflux formed by the three-phase separator 13→ the gas stripping pipe 140→ the gas-liquid separation tank 14→ the settling pipe 141→ the reflux water distribution device 142 to form additional hydraulic stirring, thus strengthening the mixing and contact of microorganisms and wastewater, improving the mass transfer efficiency, and improving the treatment efficiency. At the same time, the bubbles attached to the surface of the microorganisms are separated from the microorganisms in time, so that floating sludge is not formed.

[0081] The present embodiment also provides a first use method of the anaerobic reactor 100. The first use method, i.e., the first wastewater treatment method using the anaerobic reactor 100, specifically includes: first, feeding anaerobic sludge into the reaction zone 10a; second, collecting the organic wastewater to be treated into the water storage tank 11, and then the wastewater is transported into the reactor 10 through the water inlet pipe 110, and is uniformly distributed at the bottom of the reaction zone 10a through the water distribution device 114; the wastewater gradually rises from the bottom of the reaction zone 10a, and the organic matter in the wastewater is converted into methane, carbon dioxide, etc. by the metabolic action of anaerobic bacteria in the reaction zone 10a; the wastewater passes through the three-phase separator 13, and the gas, liquid, and solid (i.e., methane, carbon dioxide, etc.; wastewater and anaerobic bacteria) are separated by the three-phase separator 13; the wastewater enters the sedimentation zone 10b for sedimentation separation and clarification, and the purified water is collected by the water outlet collection device 101 and then discharged.

[0082] As can be seen, the first use method is also for the treatment of organic wastewater, and as known from the background art, the wastewater treatment process produces methane, carbon dioxide, etc. The prior art causes the attachment of these gases on the surface of the sludge, resulting in low sewage treatment efficiency and unstable effluent quality. However, in the case of using the anaerobic reactor 100, as described above, the influence of methane and carbon dioxide can be eliminated, and even pneumatic stirring can be achieved with the help of methane and carbon dioxide, and the wastewater treatment efficiency is improved by combining hydraulic stirring.

[0083] Further, the embodiment also provides a second use method of the anaerobic reactor 100. The second use method is a second wastewater treatment method using the anaerobic reactor 100, which specifically includes: first, adding denitrifying bacteria activated sludge into the reaction zone 10a; second, collecting the wastewater containing nitrate nitrogen to be treated into the water storage tank 11, and then conveying the wastewater into the reactor 10 through the water inlet pipe 110, and uniformly distributing the wastewater at the bottom of the reaction zone 10a through the water inlet distribution device 114; the wastewater gradually rises from the bottom of the reaction zone 10a, and the nitrate nitrogen in the wastewater is reduced to nitrogen gas through the metabolism of denitrifying bacteria in the reaction zone 10a; the wastewater passes through the three-phase separator 13, and the three-phase separation of gas, liquid and solid (i.e. nitrogen gas, carbon dioxide, etc.; wastewater and denitrifying bacteria) is completed under the action of the three-phase separator 13; the wastewater enters the sedimentation zone 10b for sedimentation separation and clarification, and the purified water is collected through the water outlet collection device 101 and then discharged.

[0084] It can be seen that the second use method is a denitrification process using denitrifying bacteria for wastewater containing nitrate nitrogen. It can be known from the background art that nitrogen gas is produced in the denitrification process, and the prior art causes the attachment of these gases on the surface of the sludge, resulting in low sewage treatment efficiency and unstable effluent quality. However, in the case of using the anaerobic reactor 100, it can be known from the foregoing that the influence of nitrogen gas can be eliminated, and even pneumatic agitation can be achieved with the help of nitrogen gas, and the wastewater treatment efficiency can be improved by combining with hydraulic agitation.

[0085] Further, the anaerobic reactor 100 of the embodiment combines Figure 1 and Figure 4 all of the three-phase separators 13 are divided into a plurality of lower three-phase separators 13(a) and a plurality of upper three-phase separators 13(b), which are self-explanatory, i.e. all the three-phase separators are divided into two layers, and the upper three-phase separators 13(b) are located above the lower three-phase separators 13(a). Among them, a plurality of three-phase separators 13(a) are arranged side by side and spaced apart in the transverse direction, and there is a gap T0 between adjacent two three-phase separators 13(a). Each three-phase separator 13(a) specifically includes two guide plates arranged in mirror symmetry in the transverse direction, each guide plate has an inclined plate 131(a) at the upper part and a vertical plate 132(a) at the lower part, the inclined plates 131(a) of the two guide plates are close to each other from bottom to top, and the vertical plates 132(a) of the two guide plates are perpendicular to the transverse direction.

[0086] A plurality of three-phase separators 13(b) are also arranged side by side and spaced apart in the transverse direction. Specifically, each three-phase separator 13(b) includes an inner structure and an outer structure, wherein: the inner structure forms an inner cavity T2 with an open lower end and an open upper end 135(b) inside, like Figure 4As shown, the inner layer structure specifically comprises two inner guide plates arranged mirror-symmetrically in the transverse direction, each having an upper inclined plate 133(b) and a lower vertical plate 134(b), the respective inclined plates 133(b) of the two inner guide plates being close to each other from bottom to top, and the respective vertical plates 134(b) of the two inner guide plates being perpendicular to the transverse direction; and the outer layer structure is wrapped outside the inner layer structure and forms a reflux gap T3 with the inner layer structure, the outer layer structure specifically comprises two outer guide plates arranged mirror-symmetrically in the transverse direction, each having an upper inclined plate 131(b) and a lower vertical plate 132(b), the respective inclined plates 131(b) of the two outer guide plates being close to each other from bottom to top, and the respective vertical plates 132(b) of the two outer guide plates being perpendicular to the transverse direction.

[0087] In addition, the three-phase separators 13(b) and the three-phase separators 13(a) are arranged alternately and staggered in the transverse direction, preferably, the lower end of the inner layer structure of the three-phase separator 13(b) covers the gap T0 between the adjacent two three-phase separators 13(a) completely, for example, to prevent the water, sludge and gas in the gap T0 from flowing into the three-phase separator 13(b) directly. Figure 4 Taking the two three-phase separators 13(a) and one three-phase separator 13(b) as an example, the left vertical plate 134(b) of the inner layer structure of the three-phase separator 13(b) is coplanar with the right vertical plate 132(a) of the left three-phase separator 13(a), and the right vertical plate 134(b) of the inner layer structure of the three-phase separator 13(b) is coplanar with the left vertical plate 132(a) of the right three-phase separator 13(a).

[0088] In this way, through the structural arrangement of the lower three-phase separator 13(a) and the upper three-phase separator 13(b), the mixed fluid formed by the water, sludge and gas in the upper part of the reaction zone 10a, part of which enters the lower three-phase separator 13(a), enters the gas-liquid separation tank 14 through the gas lifting pipe 140, and the water and sludge return to the reaction zone 10a through 141, and the gas is discharged through 14a. The remaining part of the fluid that passes through the gap T0 enters the upper three-phase separator 13(b), enters the gas-liquid separation tank 14 through the gas lifting pipe 140, and the water and sludge return to the reaction zone 10a through 141, and the gas is discharged through 14a. The water enters the sedimentation zone 10b through T4 to achieve three-phase separation of gas, water and sludge.

[0089] In the three-phase separator 13(b), the T2 region is a water-gas mixture fluid, and the T3 region is free of gas, so the density of the T3 region is greater than that of the T2 region, i.e., there is a density difference, under the action of the density difference, a circulation is formed between the T2 and T3 regions, the formation of the circulation makes the fluid in the T4 region have a downward flow rate, and the region above the T4 region is relatively static, according to Bernoulli's theorem, the flow rate is fast, and the pressure is small; the flow rate is small, and the pressure is large. Therefore, the pressure in the T4 region is less than that in the region above the T4 region, i.e., there is a pressure difference. Under the action of the pressure difference, the sludge is prevented from entering the sedimentation zone 10b, and better separation of the sludge and water is achieved.

[0090] Preferably, each of the flow guides has an axis V, and includes two flow guide plates which are mirror-symmetrically arranged with the axis V as a plane of symmetry, each of the flow guide plates has an upper inclined plate 121 and a lower vertical plate 122, whereby the respective inclined plates 121 of the two flow guide plates are close to each other from bottom to top to form a top region of the flow guide cavity 120 in an inverted V shape in a transverse cross section, and the respective vertical plates 122 of the two flow guide plates are perpendicular to the transverse direction to form a bottom region of the flow guide cavity 120 in a rectangular shape in a transverse cross section.

[0091] The longitudinal ends of each of the flow guides are respectively connected to the opposite two side walls of the reactor 10. In addition, one or more vertical partition plates 123 are arranged inside the flow guide to divide the flow guide cavity 120 into a plurality of unit cells arranged side by side in the longitudinal direction. Figure 2 In the embodiment, the number of partition plates 123 is three, and the flow guide cavity 120 is divided into four unit cells arranged side by side in the longitudinal direction, but the number of partition plates 123 is not limited to three in actual implementation. Figure 3 In the embodiment, the partition plates 123 and the two flow guide plates are connected to each other with a slight gap, but in actual implementation, the partition plates 123 and the two flow guide plates are preferably connected to each other in a sealed manner.

[0092] Further, the water inlet pipe 110 is provided with a water inlet pump 111 and a flow meter 112. The anaerobic reactor 100 further includes a control device 17 connected to the water inlet pump 111 and the flow meter 112. The control device 17 can be an industrial computer or a PCL, which can control the opening and closing of the water inlet pump 111 according to the flow value measured by the flow meter 112, and further control whether the water distribution device 114 distributes water or not.

[0093] And, the water inlet pipe 110 is also provided with a nitrate nitrogen detector 113, which is configured to detect the concentration of nitrate nitrogen in the wastewater in the water inlet pipe 110 in real time. The anaerobic reactor 100 further comprises a carbon source supplementing device, which comprises a carbon source storage barrel 16 connected to the water inlet pipe 110 through a carbon supplementing pipe 162, and a dosing pump 161 arranged on the carbon supplementing pipe 162. The control device 17 is connected to the nitrate nitrogen detector 113 and the dosing pump 161, and is configured to receive the detection result of the nitrate nitrogen detector 113, and to regulate the amount of carbon source added to the water inlet pipe 110 according to the detection result of the nitrate nitrogen detector 113.

[0094] Correspondingly, the aforementioned second use method of the anaerobic reactor 100 provided by the embodiment further comprises: detecting the concentration of nitrate nitrogen in the wastewater in the water inlet pipe 110 in real time, and regulating the amount of carbon source added to the water inlet pipe 110 in real time according to the concentration.

[0095] In this way, when the anaerobic reactor 100 is used to treat wastewater containing nitrate nitrogen by using denitrifying bacteria, the amount of carbon source added is adjusted in real time and accurately according to the concentration of nitrate nitrogen, which can ensure that the denitrifying bacteria have sufficient carbon source (i.e. organic matter) as the electron donor for the denitrification reduction reaction, thereby ensuring that the denitrification process is efficient and complete, and achieving satisfactory total nitrogen removal effect; and can also avoid the problem of secondary pollution caused by excessive addition of carbon source, which increases the COD in the effluent.

[0096] Specifically, the control device 17 regulates the amount of carbon source added to the water inlet pipe 110 according to the detection result of the nitrate nitrogen detector 113, which can be achieved by regulating the flow ratio of the dosing pump 161 and the water inlet pump 111, for example:

[0097] In an embodiment, the dosing pump 161 and the water inlet pump 111 are started and stopped synchronously, i.e. they are turned on at the same time and turned off at the same time; and the control device 17 is configured to control the unit time drug supply amount (i.e. the flow rate in unit time) of the dosing pump 161 to be constant, and to regulate the flow rate of the water inlet pump 111 (which can be achieved by regulating the motor frequency of the water inlet pump 111 through a frequency converter) according to the detection result of the nitrate nitrogen detector 113, so as to adjust the amount of carbon source added in unit volume of wastewater; of course, the control device 17 can also obtain the flow value measured by the flow meter 112 to control the flow rate of the water inlet pump 111, so as to realize closed-loop control;

[0098] In still another embodiment, the dosing pump 161 and the water inlet pump 111 are synchronously started and stopped, i.e. both are started at the same time and stopped at the same time; and the control device 17 is configured to control the flow rate of the water inlet pump 111 to be constant, and to control the flow rate of the dosing pump 161 (which can be achieved by controlling the frequency of the motor of the dosing pump 161 through a frequency converter) according to the measurement result of the nitrate nitrogen analyzer 113, so that the amount of carbon source added per unit volume of wastewater can be adjusted.

[0099] Preferably, the anaerobic reactor 100 of the present embodiment further comprises a sampling pipe 15 and a pH probe 152. The sampling pipe 15 has a sampling port 150 extending into the reaction zone 10a, i.e. the sampling pipe 15 communicates with the reaction zone 10a through the sampling port 150, so as to facilitate sampling of wastewater from the reaction zone 10a; the sampling pipe 15 is further provided with a valve 151 configured to control the opening and closing of the sampling port 150, which can be a pneumatic valve or an electric valve; when the valve 151 is opened, the sampling pipe 15 can sample wastewater from the reaction zone 10a through the sampling port 150, and vice versa. The pH probe 152 is arranged on the sampling pipe 15 and located downstream of the valve 151, so that when the valve 151 is opened, the pH probe 152 can measure the pH value of the wastewater flowing into the sampling pipe 15 from the sampling port 150.

[0100] The anaerobic reactor 100 further comprises an acid adding device, which comprises an acid storage tank 155 connected to the water storage tank 11 (or the water inlet pipe 110) through an acid adding pipe 157, and a dosing pump 156 arranged on the acid adding pipe 157. The control device 17 is connected to the pH probe 152 and the dosing pump 156, and is configured to control the opening and closing of the dosing pump 156 according to the detection result of the pH probe 152.

[0101] Correspondingly, the aforementioned second use method of the anaerobic reactor 100 provided by the present embodiment further comprises: detecting the pH value of the wastewater in the reaction zone 10a at intervals, and adding acid solution into the water storage tank 11 (or the water inlet pipe 110) according to the pH value.

[0102] In this way, when the anaerobic reactor 100 is used to treat wastewater containing nitrate nitrogen by using denitrifying bacteria, the denitrification reaction is an alkaline-producing reaction, and the suitable pH range for the denitrifying bacteria is neutral. By regularly detecting the pH value of the wastewater in the reactor 10a, the amount of acid added can be adjusted in a timely and accurate manner, so as to ensure that the denitrifying bacteria are always in a suitable acid-base environment, and the denitrification process is carried out efficiently and stably, thereby ensuring the water quality.

[0103] Further preferably, the sampling pipe 15 has multiple sampling ports 150 respectively extending to different heights of the reaction zone 10a, and is provided with multiple valves 151 corresponding to the multiple sampling ports 150. That is, the multiple sampling ports 150 respectively communicate with different heights of the reaction zone 10a, and each sampling port 150 can be independently opened and closed by the corresponding valve 151.

[0104] The control device 17 is also connected to each valve 151, and every interval, controls all valves 151 to be opened one by one. Correspondingly, in the aforementioned second use method: every interval, the pH values of the wastewater at at least two heights in the reaction zone 10a are detected, and according to the detection results, the acid solution is added into the water storage tank 11 (or the water inlet pipe 110). In this way, the data inaccuracy caused by detecting the pH value at a single height of the reaction zone 10a is avoided.

[0105] For example, for example in the illustration, for the convenience of expression and understanding, the number of sampling ports 150 is set to three, which are sampling port 150(a), 150(b) and 150(c), sampling port 150(a) is provided with valve 151(a), sampling port 150(b) is provided with valve 151(b), and sampling port 150(c) is provided with valve 151(c). Every interval, valve 151(a) is opened first to detect the pH value pH(a) of the wastewater at sampling port 150(a) in the reaction zone 10a, then valve 151(b) is opened to detect the pH value pH(b) of the wastewater at sampling port 150(b) in the reaction zone 10a, and then valve 151(c) is opened to detect the pH value pH(c) of the wastewater at sampling port 150(c) in the reaction zone 10a. The control device 17 controls the opening and closing of the dosing pump 156 according to the average value, maximum value or minimum value of pH(a), pH(b) and pH(c), so as to regulate the amount of acid added. Of course, this is only an example, and the number of sampling ports 150 is not limited thereto, for example, it can be set to two or more than four.

[0106] Most preferably, the multiple three-phase separators 13 have sampling ports 150 between the uppermost layer of flow guide devices 12, between any two adjacent layers of flow guide devices 12, and below the lowermost layer of flow guide devices 12, so as to achieve accurate measurement.

[0107] Further, the anaerobic reactor 100 further comprises a sampling backflow pipe 153. The sampling backflow pipe 153 is connected between the sampling pipe 15 and the gas-liquid separation tank 14, i.e. the downstream end of the sampling pipe 15 is connected to the gas-liquid separation tank 14 through the sampling backflow pipe 153. The wastewater in the sampling pipe 15 can return to the gas-liquid separation tank 14 under the action of gas stripping or pump driving through the sampling backflow pipe 153, for example, the sampling backflow pipe 153 has a gas stripping pipe section extending from bottom to top, the bottom end 153E of the gas stripping pipe section is connected to the gas supply device 154, so that the wastewater returns to the gas-liquid separation tank 14 under the action of gas stripping of the gas supplied by the gas supply device 154; or a backflow pump is arranged in the sampling backflow pipe 153, and the wastewater returns to the gas-liquid separation tank 14 under the driving of the backflow pump.

[0108] In summary, the embodiment has at least the following beneficial effects: when the anaerobic reactor is used to treat wastewater containing nitrate nitrogen salt nitrogen or organic wastewater, in addition to the hydraulic stirring formed by the water distribution device 114 at the bottom of the traditional reaction zone 10a, the gas force stirring formed by the flow guide device 12 gathering the gases such as methane, carbon dioxide and nitrogen generated during the reaction process, and the additional hydraulic stirring formed by the circulation backflow of the three-phase separator 13→ the gas stripping pipe 140→ the gas-liquid separation tank 14→ the settling pipe 141→ the backflow water distribution device 142, thus the stirring effect is strengthened, the wastewater and microorganisms are better mixed and contacted, the mass transfer efficiency is increased, and the treatment efficiency is improved. At the same time, the gas force stirring formed by the flow guide device 12 gathering the gases generated during the reaction process can separate the bubbles attached to the surface of the microorganisms from the microorganisms in time, so that the floating sludge is not formed.

[0109] In addition, the wastewater flow state formed in the reaction zone under the action of the structure formed by the flow guide device can promote and accelerate the formation of granular sludge. That is, another function and effect of the flow guide device is to promote the realization of sludge granulation.

[0110] Further, by arranging the nitrate nitrogen measuring instrument 113, the carbon source supplementing device, the pH probe 152 and the acid adding device, when the wastewater containing nitrate salt nitrogen is treated by denitrifying bacteria, the carbon source can be accurately added and the pH can be accurately controlled, so that the denitrification process is efficiently and completely carried out, the total nitrogen removal effect is satisfied, the addition of excessive carbon source is avoided, the COD in the effluent is increased, and the problem of secondary pollution is avoided.

[0111] Moreover, the anaerobic reactor 100 has compact equipment structure, small land occupation, high wastewater treatment efficiency and stable effluent water quality as a whole.

[0112] Example 2

[0113] Referring to Figure 5The anaerobic reactor 200 provided by the embodiment is different from the anaerobic reactor 1 provided by the embodiment 1 only in that a gas backflow assembly, a liquid seal assembly and a backflow assembly are additionally arranged. Hereinafter, only the specific structure of the difference and the effect thereof are introduced, and the remaining contents are the same as those of the embodiment 1 and will not be described herein again.

[0114] Specifically, in the embodiment, the gas backflow assembly of the anaerobic reactor 200 comprises a gas return pipe 28, a driving pump 281 and a gas distribution device 282. The gas distribution device 282 is arranged at the bottom of the reaction zone 20a and is communicated to the upper portion of the gas-liquid separation tank 24 through the gas return pipe 28. The driving pump 281 is arranged on the gas return pipe 28 and can be a pneumatic diaphragm pump or other available gas pump. The driving pump 281 is used to drive the gas such as methane, carbon dioxide and nitrogen in the gas-liquid separation tank 24 to flow to the gas distribution device 282 through the gas return pipe 28, so as to be finally released from the gas distribution device 282 at the bottom of the reaction zone 20a. In this way, the gas such as methane, carbon dioxide and nitrogen generated in the biochemical reaction process is subjected to pneumatic agitation by means of the flow guide device 22, and further subjected to gas circulation by the three-phase separator 23→ the gas stripping pipe 240→ the gas-liquid separation tank 24→ the gas return pipe 28→ the gas distribution device 282, so as to be subjected to pneumatic agitation again at the bottom of the reaction zone 20a, thereby further strengthening the pneumatic agitation effect, enhancing the mixing and contact of the microorganisms and the wastewater, strengthening the mass transfer efficiency and improving the treatment efficiency. The agitation effect generated by the gas circulation is stronger, the disturbance generated by the fluid is more violent, and the bubbles attached to the surface of the microorganisms are more easily separated from the microorganisms in time, so that the floating sludge is not formed.

[0115] Preferably, the liquid seal assembly of the anaerobic reactor 200 comprises a liquid seal device 244 and an exhaust pipe 243. The inlet of the exhaust pipe 243 is communicated with the exhaust port 24a of the gas-liquid separation tank 24, and the outlet of the exhaust pipe 243 extends into the liquid seal device 244. In this way, compared with the technology that the exhaust port 24a is open in the embodiment 1, the liquid seal device 244 is arranged downstream of the exhaust port 24a in the embodiment, so that the positive pressure in the gas-liquid separation tank 24 can be maintained, which is beneficial to the suction of the gas by the driving pump 281.

[0116] Further, the backflow assembly of the anaerobic reactor 200 comprises a flow collecting device 294, a backflow water distributing device 292, a backflow pipe 29 and a driving pump 291. The flow collecting device 294 is arranged at the top of the reaction zone 20a and below the three-phase separator 23, and is preferably fixedly installed at the bottom support side of the three-phase separator 23; the backflow water distributing device 292 is arranged at the bottom of the reaction zone 20a and is communicated to the flow collecting device 294 through the backflow pipe 29; the driving pump 291 is arranged on the backflow pipe 29 and is used to drive the fluid from the flow collecting device 294 to the backflow water distributing device 292 along the backflow pipe 29, so as to be discharged from the backflow water distributing device 292 at the bottom of the reaction zone 20a. In this way, the backflow from the top of the reaction zone 20a to the bottom of the reaction zone 20a is formed, which promotes the rapid mixing and contact of the wastewater and the microorganisms, and forms the effect of hydraulic stirring, thereby further improving the mass transfer efficiency, improving the wastewater treatment efficiency, and reducing the impact of the fluctuation of the influent load on the system.

[0117] It should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0118] The above series of detailed descriptions are only specific descriptions of the feasible embodiments of the present application, and are not used to limit the protection scope of the present application, and any equivalent embodiments or changes made without departing from the spirit of the present application should be included in the protection scope of the present application.

Claims

1. An anaerobic reactor, characterized in that, The anaerobic reactor comprises: a water storage tank; a reactor, the internal space of which is divided into a lower reaction zone and an upper sedimentation zone, the bottom of the reaction zone is provided with a water inlet distribution device, the water inlet distribution device is connected with the water storage tank through a water inlet pipe, the top of the sedimentation zone is provided with a water outlet collection device, and the water outlet collection device is a water outlet weir; a plurality of three-phase separators arranged between the reaction zone and the sedimentation zone, the top outlet of each three-phase separator is connected with a gas lifting pipe; one or more than two layers of flow guide devices arranged between the water inlet distribution device and the plurality of three-phase separators, each layer of the flow guide device comprises a plurality of flow state flow guides arranged in parallel and at intervals in the transverse direction, the internal space of each flow state flow guide forms a flow guide cavity which is wide at the bottom and narrow at the top in the transverse direction, and the top of the flow guide cavity is provided with an opening; a gas-liquid separation tank arranged above the reactor, which is connected with the gas lifting pipe and provided with a gas outlet at the top; a reflux water distribution device arranged at the bottom of the reaction zone between the water inlet distribution device and the flow guide device, and connected with the bottom of the gas-liquid separation tank through an upwardly extending settling pipe; a sampling pipe having a sampling port extending into the reaction zone, the sampling pipe is provided with a valve controlling the opening and closing of the sampling port; and a pH probe arranged on the sampling pipe and downstream of the valve; and a sampling reflux pipe connected between the sampling pipe and the gas-liquid separation tank, the sampling reflux pipe has a gas lifting pipe section extending from bottom to top, and the bottom end of the gas lifting pipe section is connected with a gas supply device.

2. The anaerobic reactor according to claim 1, characterized in that, Further comprising: an acid adding device comprising an acid storage barrel connected with the water storage tank or the water inlet pipe through an acid adding pipe, and a first drug adding pump arranged on the acid adding pipe; a control device connected with the pH probe and the first drug adding pump, and configured to control the opening and closing of the first drug adding pump according to the detection result of the pH probe.

3. The anaerobic reactor according to claim 2, characterized in that, The sampling pipe has a plurality of sampling ports respectively extending to different heights in the reaction zone, and is provided with a plurality of valves corresponding to the plurality of sampling ports one by one; The control device is further connected with each valve and controls all valves to be opened one by one at intervals.

4. The anaerobic reactor according to claim 3, characterized in that The plurality of three-phase separators, any two adjacent layers of the flow guide devices, and the bottom of the lowermost layer of the flow guide devices all have the sampling ports.

5. The anaerobic reactor according to claim 1, characterized in that, The water inlet pipe is provided with a water inlet pump, a flow meter, and a nitrate nitrogen detector; The anaerobic reactor further comprises: a carbon source supplementing device comprising a carbon source storage barrel connected with the water inlet pipe through a carbon adding pipe, and a second drug adding pump arranged on the carbon adding pipe; a control device connected with the water inlet pump, the flow meter, the nitrate nitrogen detector, and the second drug adding pump, and configured to control the flow ratio of the second drug adding pump and the water inlet pump according to the detection result of the nitrate nitrogen detector.

6. The anaerobic reactor according to claim 1, characterized in that, Further comprising: a flow collecting device arranged at the top of the reaction zone and below the three-phase separators; a reflux water distribution device arranged at the bottom of the reaction zone and communicated to the collecting device through a reflux pipe; and a driving pump arranged on the reflux pipe and used to drive the flow of fluid from the collecting device to the reflux water distribution device through the reflux pipe.

7. The anaerobic reactor according to claim 1, characterized in that, a gas distribution device arranged at the bottom of the reaction zone and communicated to the upper part of the gas-liquid separation tank through a gas return pipe; a second driving pump arranged on the gas return pipe and used to drive the flow of gas from the gas-liquid separation tank to the gas distribution device through the gas return pipe.

8. The anaerobic reactor according to claim 7, characterized in that, an exhaust pipe is arranged at the exhaust port of the gas-liquid separation tank, and the end of the exhaust pipe extends into a liquid seal device.

9. The anaerobic reactor according to claim 1, characterized in that, each of the flow state flow guides has two longitudinal ends respectively connected to the pool side walls of the reactor, and one or more vertical partition plates are arranged inside the flow guide to divide the flow guide cavity into multiple unit cells arranged side by side in the longitudinal direction; each of the flow state flow guides includes two flow guide plates arranged in mirror symmetry in the transverse direction, and each of the flow guide plates has an upper inclined plate and a lower vertical plate.

10. The anaerobic reactor according to claim 1, characterized in that, the multiple three-phase separators are divided into: a plurality of lower three-phase separators arranged side by side and spaced apart in the transverse direction; and a plurality of upper three-phase separators arranged alternately and staggered with the lower three-phase separators in the transverse direction, each of the upper three-phase separators including an inner structure and an outer structure, the inner structure having an open lower end and an open upper end, and the open lower end of the inner structure completely covering the gap between adjacent two lower three-phase separators, and the outer structure being wrapped outside the inner structure and forming a reflux gap with the inner structure.

11. A method of using the anaerobic reactor of claim 1, wherein, including the following steps: adding denitrifying bacteria activated sludge into the reaction zone; collecting the wastewater containing nitrate nitrogen to be treated into the water storage tank, and then conveying the wastewater into the reactor through the water inlet pipe and uniformly distributing the wastewater at the bottom of the reaction zone through the water inlet water distribution device; the wastewater gradually rises from the bottom of the reaction zone, and the nitrate nitrogen in the wastewater is reduced to nitrogen gas by the metabolism of denitrifying bacteria in the reaction zone; the wastewater passes through the three-phase separator to complete the three-phase separation of gas, liquid and solid under the action of the three-phase separator; the wastewater enters the sedimentation zone for sedimentation separation and clarification, and the purified water is collected through the water outlet collection device and discharged.

12. The method of using an anaerobic reactor according to claim 11, wherein, further including the step of: real-time detecting the concentration of nitrate nitrogen in the wastewater in the water inlet pipe, and real-time regulating the amount of carbon source added into the water inlet pipe according to the concentration.

13. The method of using an anaerobic reactor of claim 11, wherein, further including the step of: detecting the pH value of the wastewater at least two heights in the reaction zone in sequence every interval, and adding acid solution into the water inlet pipe or the water storage tank according to the detection result.

14. A method of using the anaerobic reactor of claim 1, wherein, including the following steps: adding anaerobic sludge into the reaction zone; collecting the organic wastewater to be treated into the water storage tank, and then conveying the wastewater into the reactor through the water inlet pipe and uniformly distributing the wastewater at the bottom of the reaction zone through the water inlet water distribution device; the wastewater gradually rises from the bottom of the reaction zone, and the organic matter in the wastewater is converted into methane and carbon dioxide by the metabolism of anaerobic bacteria in the reaction zone; the wastewater passes through the three-phase separator to complete the three-phase separation of gas, liquid and solid under the action of the three-phase separator; The wastewater enters the sedimentation zone for sedimentation separation and clarification, and the purified water is collected by the water outlet collecting device and discharged.

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