Anaerobic wastewater treatment equipment

Abstract

The invention discloses anaerobic wastewater treatment equipment which comprises an anaerobic tower for treating wastewater through anaerobic fermentation and an external pressure ultrafiltration membrane assembly, and wastewater enters the external pressure ultrafiltration membrane assembly through a second liquid inlet pipe after being subjected to anaerobic fermentation treatment in the anaerobic tower. The external pressure ultrafiltration membrane assembly is used for separating wastewater to divide the wastewater into produced water and concentrated water, the chemical cleaning assembly comprises a chemical cleaning water tank and a chemical cleaning water pipe, the chemical cleaning water pipe is communicated with the interior of the chemical cleaning water tank, and a chemical cleaning agent in the chemical cleaning water tank enters the external pressure ultrafiltration membrane assembly through the chemical cleaning water pipe for chemical cleaning; the anaerobic tower and the external pressure type ultrafiltration membrane are combined, pollutants in the wastewater are removed through anaerobic reaction, then the wastewater is divided into produced water and concentrated water through the external pressure type ultrafiltration membrane, the concentrated water flows back to the anaerobic tower for circular reaction, the produced water is stored in the produced water tank, and the produced water is recycled. Meanwhile, the equipment can be used for carrying out online cleaning on the external pressure type ultrafiltration membrane through the chemical cleaning assembly.

Description

Technical Field

[0001] The present application relates to the technical field of wastewater treatment, and in particular to an anaerobic wastewater treatment device. Background Art

[0002] COD (Chemical Oxygen Demand) is a very important indicator for judging whether the water environment is polluted. In the study of river pollution and the properties of industrial wastewater and the operation and management of wastewater treatment plants, it is an important and quickly measured organic pollution parameter. General wastewater contains oil and has a high COD value. Traditional wastewater treatment equipment is not effective in reducing the COD value after wastewater purification. At the same time, the filter components of the equipment will affect the purification effect of the equipment when there are too many suspended solids, requiring staff to shut down and chemically clean the equipment, affecting work efficiency and high costs. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of this application is to provide an anaerobic wastewater treatment device to effectively solve the above technical problems.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] The present application provides an anaerobic wastewater treatment device, comprising:

[0006] An anaerobic tower, wherein the interior of the anaerobic tower is connected to a first liquid inlet pipe, the first liquid inlet pipe is connected to a wastewater source, wastewater enters the anaerobic tower from the wastewater source through the first liquid inlet pipe, and the anaerobic tower treats the wastewater by anaerobic fermentation.

[0007] An external pressure ultrafiltration membrane assembly, wherein the interior of the external pressure ultrafiltration membrane assembly is connected to a second liquid inlet pipe, and the second liquid inlet pipe is connected to the interior of the anaerobic tower. After the wastewater is treated by anaerobic fermentation in the anaerobic tower, it enters the external pressure ultrafiltration membrane assembly through the second liquid inlet pipe. The external pressure ultrafiltration membrane assembly performs separation treatment on the wastewater so that the wastewater is divided into produced water and concentrated water. The interior of the external pressure ultrafiltration membrane assembly is connected to a concentrated water pipe, and the concentrated water pipe is connected to the interior of the anaerobic tower. The concentrated water in the external pressure ultrafiltration membrane assembly flows back to the interior of the anaerobic tower through the concentrated water pipe. The interior of the external pressure ultrafiltration membrane assembly is connected to a produced water pipe, and the produced water pipe is connected to the interior of a produced water tank. The produced water in the external pressure ultrafiltration membrane assembly enters the produced water tank through the produced water pipe for storage.

[0008] A chemical cleaning component, the chemical cleaning component includes a chemical cleaning water tank and a chemical cleaning water pipe. The interior of the chemical cleaning water tank is connected to the chemical cleaning water pipe, and the chemical cleaning water pipe is connected to the interior of the external pressure ultrafiltration membrane component. The chemical cleaning agent in the chemical cleaning water tank enters the interior of the external pressure ultrafiltration membrane component through the chemical cleaning water pipe for chemical cleaning.

[0009] Furthermore, the interior of the anaerobic tower is connected to a biogas pipe, and an explosion-proof fan is provided on the biogas pipe. The biogas pipe is connected to the interior of the external-pressure ultrafiltration membrane assembly, and the biogas generated in the anaerobic tower enters the interior of the external-pressure ultrafiltration membrane assembly through the biogas pipe and the explosion-proof fan. Anaerobic fermentation in the anaerobic tower will produce biogas, so the device uses the biogas generated in the anaerobic tower as an aeration source, and passes the biogas in the anaerobic tower into the external-pressure ultrafiltration membrane assembly through the biogas pipe through the fan to reduce membrane pollution and clogging.

[0010] Furthermore, the biogas pipe is connected to a biogas return pipe, which is connected to the interior of the anaerobic tower. The biogas in the biogas pipe flows back to the interior of the anaerobic tower through the biogas return pipe. The biogas return pipe allows the biogas to flow back to the anaerobic tower to provide aeration for the anaerobic tower.

[0011] Furthermore, the concentrate pipe includes a concentrate return pipe and a chemical washing concentrate pipe, the concentrate return pipe is connected to the interior of the anaerobic tower, and the concentrate in the external pressure ultrafiltration membrane assembly flows back to the interior of the anaerobic tower through the concentrate return pipe, and the chemical washing concentrate pipe is connected to the interior of the chemical washing water tank, and the concentrate in the external pressure ultrafiltration membrane assembly enters the chemical washing water tank through the chemical washing concentrate pipe, a part of the concentrate separated inside the external pressure ultrafiltration membrane assembly flows back to the anaerobic tower for circulation treatment, and the other part enters the chemical washing water tank through the chemical washing concentrate pipe to be used as one of the raw materials for chemical cleaning agents.

[0012] Furthermore, the water production pipe includes a water production spray pipe and a water production inlet pipe, the water production spray pipe is connected to the interior of the anaerobic tower, the water production in the external pressure ultrafiltration membrane module enters the interior of the anaerobic tower through the water production spray pipe, the water production inlet pipe is connected to the interior of the water production tank, the water production in the external pressure ultrafiltration membrane module enters the interior of the water production tank through the water production inlet pipe; a part of the water production separated from the external pressure ultrafiltration membrane module enters the interior of the anaerobic tower through the spray pipe, so that the water production is used as spray water to eliminate scum and bubbles on the top of the anaerobic tower, and another part of the product enters the water production tank through the water production inlet pipe for storage.

[0013] Furthermore, it also includes a tap water pipe, the inside of the chemical washing water tank is connected to the tap water pipe, the tap water pipe is connected to a tap water source, and the tap water enters the inside of the chemical washing water tank through the tap water pipe. The tap water enters the chemical washing water tank and is mixed with the concentrated water separated by the external pressure ultrafiltration membrane component as a chemical cleaning agent. During chemical cleaning, appropriate chemicals should be selected according to the types of pollutants causing membrane pollution. Generally, inorganic pollutants are cleaned with citric acid and hydrochloric acid; organic pollutants are cleaned with alkali and NaClO; oil stains are cleaned with alkali, surfactants or a combination of the two. The selection of chemical reagents and dosages are determined based on the specific raw water quality and treatment experience.

[0014] Furthermore, the first liquid inlet pipe is provided with a diaphragm pump and a first check valve.

[0015] The second liquid inlet pipe is provided with an explosion-proof centrifugal pump and a first pressure gauge.

[0016] The concentrated water pipe is provided with a second pressure gauge and a second check valve.

[0017] The chemical washing water pipe is provided with a chemical washing filter.

[0018] The diaphragm pump and the explosion-proof centrifugal pump provide power for the solution circulation, the first check valve and the second check valve are used to prevent the liquid in the pipe from flowing back, the first pressure gauge and the second pressure gauge are used to check the pressure in the pipe, and the chemical cleaning filter is used to filter the chemical cleaning agent.

[0019] Furthermore, the second liquid inlet pipe is connected to the nitrogen pipe, and nitrogen enters the external pressure ultrafiltration membrane assembly through the nitrogen pipe and the second liquid inlet pipe. When the external pressure ultrafiltration membrane assembly needs to be cleaned by air flushing, nitrogen is used as a source and provided through the nitrogen pipe.

[0020] Furthermore, the interior of the anaerobic tower is connected to a first drain pipe, through which the internal liquid is drained from the anaerobic tower; the interior of the external pressure ultrafiltration membrane module is connected to a second drain pipe, through which the internal liquid is drained from the external pressure ultrafiltration membrane module.

[0021] Beneficial Effects

[0022] The present application adopts a combination of an anaerobic tower and an external pressure ultrafiltration membrane. The pollutants in the wastewater are first removed through anaerobic reaction, and then the wastewater is separated into produced water and concentrated water through the external pressure ultrafiltration membrane. The concentrated water is returned to the anaerobic tower for cyclic reaction, and the produced water is stored in the produced water tank. The use of anaerobic process can effectively reduce COD and salts in the wastewater, and the subsequent treatment cost of membrane produced water is greatly reduced. At the same time, the combination of anaerobic and ultrafiltration membranes also reduces energy consumption. The operation process produces usable biogas, which has great economic and environmental benefits. At the same time, the equipment can perform online cleaning of the external pressure ultrafiltration membrane through a chemical cleaning component, thereby effectively improving the working efficiency of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings are used to provide an understanding of the technical solution of the present disclosure and constitute a part of the specification. Together with the embodiments of the present disclosure, they are used to explain the technical solution of the present disclosure and do not constitute a limitation on the technical solution of the present disclosure. The shapes and sizes of the components in the accompanying drawings do not reflect the actual proportions and are only intended to illustrate the content of the present application.

[0024] Figure 1 A schematic diagram of the overall structure of a wastewater treatment device provided in one embodiment of the present application.

[0025] Figure 2 A wastewater treatment process flow chart provided for one embodiment of the present application.

[0026] In the above figures,

[0027] 1. Anaerobic tower; 2. First liquid inlet pipe; 3. Wastewater source; 4. External pressure ultrafiltration membrane assembly; 5. Second liquid inlet pipe; 6. Water production tank; 7. Chemical washing water tank; 8. Chemical washing water pipe; 9. Biogas pipe; 10. Explosion-proof fan; 11. Biogas return pipe; 12. Concentrate return pipe; 13. Chemical washing concentrate pipe; 14. Water production spray pipe; 15. Water production inlet pipe; 16. Tap water pipe; 17. Tap water source; 18. Diaphragm pump; 19. First check valve; 20. Explosion-proof centrifugal pump; 21. First pressure gauge; 22. Second pressure gauge; 23. Second check valve; 24. Chemical washing filter; 25. Nitrogen pipe; 26. First drain pipe; 27. Second drain pipe. DETAILED DESCRIPTION

[0028] The above scheme is further described below in conjunction with specific examples. It should be understood that these examples are used to illustrate the present application and are not limited to the scope of the present application. The implementation conditions adopted in the examples can be further adjusted as the conditions of the specific manufacturer, and the unspecified implementation conditions are usually the conditions in conventional experiments.

[0029] Unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present disclosure should be understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connecting" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. In this article, "electrical connection" includes the situation where the constituent elements are connected together through an element with some electrical function. "Elements with some electrical function" are not particularly limited as long as they can transfer electrical signals between the connected constituent elements. "Elements with some electrical function" can be, for example, electrodes or wiring, or switching elements such as transistors, or other functional elements such as resistors, inductors or capacitors. "Up", "down", "left", "right", etc. are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0030] In this application, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "middle", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0031] Example

[0032] An embodiment of the present application provides an anaerobic wastewater treatment device, such as Figure 1 and Figure 2 As shown, the device includes:

[0033] The anaerobic tower 1 is connected to a first liquid inlet pipe 2, which is connected to a wastewater source 3. Wastewater enters the anaerobic tower 1 from the wastewater source 3 through the first liquid inlet pipe 2. The anaerobic tower 1 treats the wastewater through anaerobic fermentation.

[0034] The external pressure ultrafiltration membrane assembly 4 is connected to the second liquid inlet pipe 5, and the second liquid inlet pipe 5 is connected to the inside of the anaerobic tower 1. After the wastewater is treated by anaerobic fermentation in the anaerobic tower 1, it enters the external pressure ultrafiltration membrane assembly 4 through the second liquid inlet pipe 5. The external pressure ultrafiltration membrane assembly 4 separates the wastewater so that the wastewater is divided into produced water and concentrated water. Among them, the external pressure ultrafiltration membrane assembly 4 is connected to the concentrated water pipe, and the concentrated water pipe is connected to the inside of the anaerobic tower 1. The concentrated water in the external pressure ultrafiltration membrane assembly 4 is The concentrated water pipe flows back to the inside of the anaerobic tower 1, the external pressure ultrafiltration membrane assembly 4 is connected to the water production pipe, the water production pipe is connected to the inside of the water production tank 6, the water produced in the external pressure ultrafiltration membrane assembly 4 enters the water production tank 6 through the water production pipe for storage, the concentrated water pipe includes a concentrated water return pipe 12 and a chemical washing concentrated water pipe 13, the concentrated water return pipe 12 is connected to the inside of the anaerobic tower 1, the concentrated water in the external pressure ultrafiltration membrane assembly 4 flows back to the inside of the anaerobic tower 1 through the concentrated water return pipe 12, and the chemical washing concentrated water pipe 13 is connected to the chemical washing water tank 7, the concentrated water in the external pressure ultrafiltration membrane assembly 4 enters the chemical washing water tank 7 through the chemical washing concentrated water pipe 13, a part of the concentrated water separated in the external pressure ultrafiltration membrane assembly 4 flows back to the anaerobic tower 1 for circulation treatment, and the other part enters the chemical washing water tank 7 through the chemical washing concentrated water pipe 13 to be used as one of the raw materials of the chemical cleaning agent; the water production pipe includes a water production spray pipe 14 and a water production inlet pipe 15, the water production spray pipe 14 is connected to the inside of the anaerobic tower 1, the produced water in the external pressure ultrafiltration membrane assembly 4 enters the inside of the anaerobic tower 1 through the water production spray pipe 14, the produced water in the water production inlet pipe 15 is connected to the inside of the water production tank 6, and the produced water in the external pressure ultrafiltration membrane assembly 4 enters the inside of the water production tank 6 through the water production inlet pipe 15; a part of the produced water separated in the external pressure ultrafiltration membrane assembly 4 enters the inside of the anaerobic tower 1 through the spray pipe, so that the produced water is used as spray water to eliminate the scum and bubbles on the top of the anaerobic tower 1, and the other part of the product enters the water production tank 6 through the water production inlet pipe 15 for storage.

[0035] The chemical cleaning component includes a chemical cleaning water tank 7 and a chemical cleaning water pipe 8. The chemical cleaning water tank 7 is connected to the chemical cleaning water pipe 8, and the chemical cleaning water pipe 8 is connected to the inside of the external pressure ultrafiltration membrane component 4. The chemical cleaning agent in the chemical cleaning water tank 7 enters the inside of the external pressure ultrafiltration membrane component 4 through the chemical cleaning water pipe 8 and enters the chemical cleaning.

[0036] The membrane assembly used in this scheme is an ultrafiltration membrane assembly for use with an anaerobic tower 1. The system operation mode is external pressure. The wastewater enters the anaerobic tower 1 and stays for 4-8 hours before entering the external pressure membrane assembly for treatment. At the same time, the residence time of the anaerobic tower 1 is maintained at 4 to 8 hours. After anaerobic fermentation reduces pollutants in the wastewater, the suspended solids are separated by the ultrafiltration membrane assembly so that the membrane water meets the subsequent treatment requirements. During the operation, an external pressure control method is adopted, that is, the system is pumped through a mode of running for 8 minutes and stopping for 2 minutes to observe the change law of the flux or water production flow rate. If the water production flow rate has a significant decrease (20 to 30% of the design flux), it is recommended to chemically clean the membrane. The membrane assembly can be chemically cleaned online through the chemical cleaning assembly.

[0037] In some embodiments, the interior of the anaerobic tower 1 is connected to a biogas pipe 9, on which an explosion-proof fan 10 is provided, and the biogas pipe 9 is connected to the interior of the external pressure ultrafiltration membrane assembly 4, and the biogas generated inside the anaerobic tower 1 enters the interior of the external pressure ultrafiltration membrane assembly 4 through the biogas pipe 9 and the explosion-proof fan 10; the anaerobic fermentation in the anaerobic tower 1 will produce biogas, so the present device uses the biogas generated in the anaerobic tower 1 as an aeration source, and passes the biogas in the anaerobic tower 1 through the biogas pipe 9 through the fan into the external pressure ultrafiltration membrane assembly 4 to reduce membrane pollution and clogging.

[0038] In some embodiments, the biogas pipe 9 is connected to the biogas return pipe 11, and the biogas return pipe 11 is connected to the inside of the anaerobic tower 1. The biogas in the biogas pipe 9 flows back to the inside of the anaerobic tower 1 through the biogas return pipe 11; the biogas return pipe 11 can allow the biogas to flow back to the anaerobic tower 1 to perform an aeration function for the anaerobic tower 1.

[0039] In some embodiments, the device also includes a tap water pipe 16, the chemical washing water tank 7 is connected to the tap water pipe 16, the tap water pipe 16 is connected to the tap water source 17, the tap water enters the chemical washing water tank 7 through the tap water pipe 16, the tap water enters the chemical washing water tank 7 and is mixed with the concentrated water separated by the external pressure ultrafiltration membrane assembly 4 as a chemical cleaning agent. During chemical cleaning, appropriate chemicals should be selected according to the type of pollutants causing membrane pollution. Generally, inorganic pollutants are cleaned with citric acid and hydrochloric acid; organic pollutants are cleaned with alkali and NaClO; oil stains are cleaned with alkali, surfactants or a combination of the two. The selection of chemical reagents and dosages are determined based on the specific raw water quality and treatment experience.

[0040] In some embodiments, a diaphragm pump 18 and a first check valve 19 are provided on the first liquid inlet pipe 2, an explosion-proof centrifugal pump 20 and a first pressure gauge 21 are provided on the second liquid inlet pipe 5, and a second pressure gauge 22 and a second check valve 23 are provided on the concentrated water pipe.

[0041] A chemical washing filter 24 is provided on the chemical washing water pipe 8, the diaphragm pump 18 and the explosion-proof centrifugal pump 20 provide power for the solution circulation, the first check valve 19 and the second check valve 23 are used to prevent the liquid in the pipe from flowing back, the first pressure gauge 21 and the second pressure gauge 22 are used to check the pressure in the pipe, and the chemical washing filter 24 is used to filter the chemical cleaning agent.

[0042] In some embodiments, the second liquid inlet pipe 5 is connected to the nitrogen pipe 25, and nitrogen enters the external pressure ultrafiltration membrane assembly 4 through the nitrogen pipe 25 and the second liquid inlet pipe 5. When the external pressure ultrafiltration membrane assembly 4 needs to be cleaned by air flushing, nitrogen is used as a source and provided through the nitrogen pipe 25.

[0043] In some embodiments, the interior of the anaerobic tower 1 is connected to the first drain pipe 26, and the internal liquid of the anaerobic tower 1 is emptied through the first drain pipe 26. The interior of the external pressure ultrafiltration membrane assembly 4 is connected to the second drain pipe 27, and the internal liquid of the external pressure ultrafiltration membrane assembly 4 is emptied through the second drain pipe 27.

[0044] This embodiment combines an anaerobic tower 1 with an external pressure ultrafiltration membrane. The pollutants in the wastewater are first removed through anaerobic reaction, and then the wastewater is separated into produced water and concentrated water through the external pressure ultrafiltration membrane. The concentrated water is returned to the anaerobic tower 1 for cyclic reaction, and the produced water is stored in the produced water tank 6. The use of anaerobic process can effectively reduce COD and salts in the wastewater, and the subsequent treatment cost of membrane produced water is greatly reduced. At the same time, the combination of anaerobic and ultrafiltration membranes also reduces energy consumption. The operation process produces usable biogas, which has great economic and environmental benefits. At the same time, the equipment can perform online cleaning of the external pressure ultrafiltration membrane through a chemical cleaning component, thereby effectively improving the working efficiency of the equipment.

[0045] The above embodiments are only for illustrating the technical concept and features of the present application, and their purpose is to enable people familiar with the technology to understand the content of the present application and implement it accordingly, and they cannot be used to limit the protection scope of the present application. Any equivalent transformation or modification made according to the spirit of the present application shall be included in the protection scope of the present application.

Claims

1. An anaerobic wastewater treatment equipment, characterized in that: include: An anaerobic tower, wherein the interior of the anaerobic tower is connected to a first liquid inlet pipe, the first liquid inlet pipe is connected to a wastewater source, wastewater enters the anaerobic tower from the wastewater source through the first liquid inlet pipe, and the anaerobic tower treats the wastewater by anaerobic fermentation. An external pressure ultrafiltration membrane assembly, wherein the interior of the external pressure ultrafiltration membrane assembly is connected to a second liquid inlet pipe, and the second liquid inlet pipe is connected to the interior of the anaerobic tower. After the wastewater is treated by anaerobic fermentation in the anaerobic tower, it enters the external pressure ultrafiltration membrane assembly through the second liquid inlet pipe. The external pressure ultrafiltration membrane assembly performs separation treatment on the wastewater so that the wastewater is divided into produced water and concentrated water. The interior of the external pressure ultrafiltration membrane assembly is connected to a concentrated water pipe, and the concentrated water pipe is connected to the interior of the anaerobic tower. The concentrated water in the external pressure ultrafiltration membrane assembly flows back to the interior of the anaerobic tower through the concentrated water pipe. The interior of the external pressure ultrafiltration membrane assembly is connected to a produced water pipe, and the produced water pipe is connected to the interior of a produced water tank. The produced water in the external pressure ultrafiltration membrane assembly enters the produced water tank through the produced water pipe for storage. A chemical cleaning component, the chemical cleaning component includes a chemical cleaning water tank and a chemical cleaning water pipe. The interior of the chemical cleaning water tank is connected to the chemical cleaning water pipe, and the chemical cleaning water pipe is connected to the interior of the external pressure ultrafiltration membrane component. The chemical cleaning agent in the chemical cleaning water tank enters the interior of the external pressure ultrafiltration membrane component through the chemical cleaning water pipe for chemical cleaning.

2. The anaerobic wastewater treatment equipment according to claim 1, characterized in that: The interior of the anaerobic tower is connected to a biogas pipe, on which an explosion-proof fan is provided. The biogas pipe is connected to the interior of the external pressure ultrafiltration membrane assembly, and the biogas generated inside the anaerobic tower enters the interior of the external pressure ultrafiltration membrane assembly through the biogas pipe and the explosion-proof fan.

3. The anaerobic wastewater treatment equipment according to claim 2, characterized in that: The biogas pipe is connected to a biogas return pipe, and the biogas return pipe is connected to the interior of the anaerobic tower. The biogas in the biogas pipe flows back to the interior of the anaerobic tower through the biogas return pipe.

4. The anaerobic wastewater treatment equipment according to claim 1, characterized in that: The concentrate water pipe includes a concentrate water return pipe and a chemical washing concentrate water pipe. The concentrate water return pipe is connected to the interior of the anaerobic tower, and the concentrate water in the external pressure ultrafiltration membrane assembly flows back to the interior of the anaerobic tower through the concentrate water return pipe. The chemical washing concentrate water pipe is connected to the interior of the chemical washing water tank, and the concentrate water in the external pressure ultrafiltration membrane assembly enters the interior of the chemical washing water tank through the chemical washing concentrate water pipe.

5. The anaerobic wastewater treatment equipment according to claim 1, characterized in that: The water production pipe includes a water production spray pipe and a water production inlet pipe. The water production spray pipe is connected to the interior of the anaerobic tower, and the water produced in the external pressure ultrafiltration membrane module enters the interior of the anaerobic tower through the water production spray pipe. The water production inlet pipe is connected to the interior of the water production tank, and the water produced in the external pressure ultrafiltration membrane module enters the interior of the water production tank through the water production inlet pipe.

6. The anaerobic wastewater treatment equipment according to claim 1, characterized in that: It also includes a tap water pipe, the interior of the chemical washing water tank is connected to the tap water pipe, the tap water pipe is connected to a tap water source, and tap water enters the interior of the chemical washing water tank through the tap water pipe.

7. The anaerobic wastewater treatment equipment according to claim 1, characterized in that: The first liquid inlet pipe is provided with a diaphragm pump and a first check valve. The second liquid inlet pipe is provided with an explosion-proof centrifugal pump and a first pressure gauge. The concentrated water pipe is provided with a second pressure gauge and a second check valve. A chemical washing filter is arranged on the chemical washing water pipe.

8. The anaerobic wastewater treatment equipment according to claim 1, characterized in that: The second liquid inlet pipe is connected to the nitrogen pipe, and nitrogen enters the interior of the external pressure ultrafiltration membrane assembly through the nitrogen pipe and the second liquid inlet pipe.

9. The anaerobic wastewater treatment equipment according to claim 1, characterized in that: The interior of the anaerobic tower is connected to a first drain pipe, through which the internal liquid of the anaerobic tower is drained; the interior of the external pressure ultrafiltration membrane module is connected to a second drain pipe, through which the internal liquid of the external pressure ultrafiltration membrane module is drained.

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