Integrated industrial wastewater treatment system

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to an integrated industrial wastewater treatment system which comprises a pretreatment device, an adjusting tank, a hydrolysis acidification tank, an inclined plate sedimentation tank, a primary AO biochemical treatment tank, an MBR (membrane bioreactor) membrane tank and an RO (reverse osmosis) system which are sequentially connected through pipelines, the pretreatment device is used for removing salt, large-particle suspended solids and impurities in the wastewater; the regulating tank is used for carrying out homogenization and flow regulation on the wastewater; the hydrolysis acidification pool is used for degrading organic matters in the wastewater; the inclined plate sedimentation tank is used for removing suspended matters and sediments in water; the AO biochemical treatment tank is used for degrading organic matters and nitrogen and phosphorus substances in the wastewater; the MBR membrane tank is used for enabling the wastewater to reach the effluent standard; the RO reverse osmosis system is used for enabling the effluent quality to reach the drinking water standard; a pure water outlet of the RO reverse osmosis system is communicated with the reuse water system; according to the utility model, the wastewater treatment efficiency is improved, and meanwhile, the wastewater treated by the system meets the industrial water standard requirement.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to an integrated industrial wastewater treatment system. Background Art

[0002] Against the backdrop of rapid industrial development, the amount of industrial wastewater generated is increasing, especially wastewater containing inorganic salts, heavy metal ions, suspended matter and organic pollutants, which poses a serious threat to the environment and human health.

[0003] Industrial wastewater contains a variety of organic matter, inorganic salts and heavy metal ions. Traditionally, industrial wastewater is treated with a single technology, mainly including physical treatment, chemical treatment and biological treatment. However, a single treatment technology is often difficult to treat wastewater, the treatment effect is not ideal, and the treatment efficiency is low. It is difficult for wastewater treated by a single treatment technology to meet the effluent standards. For example, physical treatment methods such as grids, screens, sedimentation, filtration, flotation, etc. can remove some suspended matter and larger particulate matter, but the removal effect of pollutants such as dissolved organic matter and heavy metals is limited, and the treatment efficiency is low. Chemical treatment methods such as coagulation and sedimentation, neutralization, redox, and adsorption can remove certain specific pollutants, but are prone to secondary pollution and are costly. Biological treatment methods such as activated sludge method, biofilm method, membrane separation, etc. use the metabolic action of microorganisms to degrade organic matter, but the treatment effect is not ideal for some high-concentration and difficult-to-degrade industrial wastewater, and the operating stability is greatly affected by factors such as water quality and temperature.

[0004] Therefore, it is necessary to design an integrated industrial wastewater treatment system to improve the above problems. Summary of the Invention

[0005] In order to solve the problems of the prior art, the utility model provides an integrated industrial wastewater treatment system, including a pretreatment device, a regulating tank, a hydrolysis acidification tank, an inclined plate sedimentation tank, a primary AO biochemical treatment tank, an MBR membrane tank, and an RO reverse osmosis system connected in sequence through pipelines;

[0006] The pretreatment device is used to remove salt, large suspended particles and impurities from the wastewater;

[0007] The regulating tank is used to homogenize and regulate the flow of wastewater;

[0008] The hydrolysis and acidification tank is used to degrade organic matter in wastewater;

[0009] The inclined plate sedimentation tank is used to remove suspended matter and sediment in water;

[0010] The AO biochemical treatment pool is used to degrade organic matter and nitrogen and phosphorus substances in wastewater;

[0011] The MBR membrane tank is used to make the wastewater meet the effluent standards;

[0012] The RO reverse osmosis system is used to ensure that the water quality reaches the drinking water standard; the pure water outlet of the RO reverse osmosis system is connected to the recycled water system for recycling the treated water, and the concentrated water outlet of the RO reverse osmosis system is connected to the multi-effect evaporation system;

[0013] The wastewater treatment system further comprises a sludge tank, wherein the feed port of the sludge tank is connected to the mud outlets of the inclined plate sedimentation tank and the MBR membrane tank respectively through pipelines, and the discharge port of the sludge tank is connected to the sludge treatment device;

[0014] A container, wherein the regulating tank, hydrolysis acidification tank, inclined plate sedimentation tank, primary AO biochemical treatment tank, MBR membrane tank, sludge tank and RO reverse osmosis system are integrated in the container;

[0015] Among them, the pretreatment device is arranged outside the container, and an equipment room is also provided in the container, in which a driving device and an electronic control device are provided; the pretreatment device, regulating tank, hydrolysis acidification tank, inclined plate sedimentation tank, primary AO biochemical treatment tank, MBR membrane tank and RO reverse osmosis system are all installed with a monitoring system and a dosing device system, and the control system is respectively connected to the electronic control equipment, driving device, monitoring system and dosing device system, and is used to monitor water quality parameters in real time through the monitoring system, control and adjust the wastewater treatment process through the electronic control equipment according to the parameters, and drive the dosing device corresponding to each process to add medicine.

[0016] Furthermore, the primary AO biochemical treatment pool includes a primary anoxic pool and a primary aerobic pool connected in sequence, the water outlet of the aerobic pool is connected to the water inlet of the MBR membrane pool through a pipe, and a reflux pipe is provided between the primary anoxic pool and the MBR membrane pool.

[0017] Furthermore, the pretreatment device includes a multi-effect evaporation system and a filtration system;

[0018] The multiple-effect evaporation system is a multiple-effect evaporator, and the filtration system is a basket filter;

[0019] The multi-effect evaporator is used to evaporate and concentrate high-salt wastewater to remove salt;

[0020] The basket filter is connected to the water outlet of the multiple-effect evaporator and is used to remove large suspended particles and impurities in the wastewater. The water outlet of the basket filter is connected to the regulating tank.

[0021] Furthermore, the sludge treatment device includes a sludge dewatering system, the discharge port of the sludge tank is connected to the regulating tank through a recycling pipe, and the second pipe of the sludge tank is connected to the sludge dewatering system, and the sludge discharge pipe of the sludge dewatering system is connected to the dry mud transfer device through the sludge output device.

[0022] Furthermore, the hydrolysis and acidification tank and the primary anoxic tank are both equipped with stirring devices to allow the wastewater to fully contact with anaerobic microorganisms, thereby accelerating the escape of gas generated by the decomposition of organic matter in the wastewater.

[0023] Furthermore, the regulating tank, hydrolysis acidification tank, inclined plate sedimentation tank, primary AO biochemical treatment tank and MBR membrane tank are all separated by partitions and connected through the openings on the partitions according to the direction of wastewater treatment flow.

[0024] Beneficial effects of the utility model:

[0025] The utility model is an integrated industrial wastewater treatment system which sequentially connects a pretreatment device, a regulating tank, a hydrolysis acidification tank, an inclined plate sedimentation tank, a primary AO biochemical treatment tank, an MBR membrane tank, and an RO reverse osmosis system through pipelines. It integrates physical treatment, chemical treatment, and biological treatment to treat wastewater. Physical methods are used to remove salt, large suspended solids, and impurities in the wastewater through the pretreatment device. Chemical treatment degrades organic matter in the wastewater through the hydrolysis acidification tank. Biological treatment degrades organic matter and nitrogen and phosphorus substances in the wastewater through the AO biochemical treatment tank. An MBR membrane tank is set up to ensure that the wastewater meets the effluent standards.

[0026] The pretreatment device is set outside the container, and there is also an equipment room inside the container. The equipment room is equipped with a drive device for driving the electronic control equipment in the container and monitoring water quality parameters in real time, and automatically adjusting the treatment process, so that the system has good automatic control and intelligent management functions. The system solves the problem of industrial wastewater pollution, improves wastewater treatment efficiency, and at the same time ensures that the wastewater meets the industrial water standards after treatment by the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the practical integrated industrial wastewater treatment system;

[0028] Reference numerals:

[0029] In the figure: 1-multi-effect evaporator, 2-basket filter, 3-equalization tank, 4-hydrolysis acidification tank, 5-inclined plate sedimentation tank, 6-MBR membrane tank, 7-RO reverse osmosis system, 8-recycled water system, 9-dry mud transfer device, 10-first-level anoxic tank, 11-first-level aerobic tank, 12-return pipe, 13-reuse pipe, 14-sedimentation tank, 15-sludge dewatering system. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] See also Figure 1 The utility model provides an integrated industrial wastewater treatment system, which mainly includes a pretreatment isolation section, an anaerobic treatment section (hydrolysis acidification tank), a primary AO biochemical treatment section, an MBR membrane treatment section, a sludge treatment section and a reverse osmosis treatment section;

[0032] Specifically, the pretreatment isolation section is mainly used to remove salt, large suspended solids and impurities in the wastewater; the anaerobic treatment section is mainly used to degrade organic matter in the wastewater through the action of anaerobic microorganisms, so that various organic matter and other indicators are greatly reduced; the primary AO biochemical treatment section is mainly used to remove organic matter and nitrogen and phosphorus substances in the wastewater; the MBR membrane treatment section further removes suspended solids and microorganisms through membrane biology and filtration separation technology to ensure the effluent quality, making the effluent quality stable, effectively removing microorganisms, and having high system stability; the reverse osmosis treatment section is used to deeply desalinate the water after MBR membrane treatment and remove small molecular pollutants, so that the effluent quality meets the drinking water standard, has a high reuse rate, and can meet the process and product water standards in the "Water Quality for Industrial Water Used in Municipal Wastewater Recycling" (GB / T19923-2005);

[0033] The integrated industrial wastewater treatment system includes a pretreatment device, a regulating tank, a hydrolysis acidification tank, an inclined plate sedimentation tank, a primary AO biochemical treatment tank, an MBR membrane tank, and an RO reverse osmosis system, which are connected in sequence through pipelines.

[0034] Pretreatment equipment to remove salt, large suspended solids and impurities from wastewater;

[0035] Regulating tank 3: used for homogenizing and regulating the flow of wastewater;

[0036] Hydrolysis and acidification tank 4, used to degrade organic matter in wastewater;

[0037] Inclined plate sedimentation tank 5, used to remove suspended matter and sediment in water;

[0038] The first-level AO biochemical treatment pool is used to degrade organic matter and nitrogen and phosphorus substances in wastewater;

[0039] MBR membrane tank 6, used to make the wastewater meet the effluent standards;

[0040] The RO reverse osmosis system 7 is connected to the outlet pipe of the MBR membrane tank 6 to ensure that the effluent water quality meets the drinking water standard; the pure water outlet of the RO reverse osmosis system 7 is connected to the recycled water system 8 for recycling the treated water, and the concentrated water outlet of the RO reverse osmosis system 7 is connected to the multi-effect evaporation system for further evaporation and concentration of the wastewater to remove salt;

[0041] The wastewater treatment system further comprises a sludge tank, the feed port of the sludge tank is respectively connected to the mud outlet of the inclined plate sedimentation tank 5 and the MBR membrane tank 6 through a first pipe, and the discharge port of the sludge tank is connected to the sludge treatment device;

[0042] A container, wherein the regulating tank 3, the hydrolysis acidification tank 4, the inclined plate sedimentation tank 5, the primary AO biochemical treatment tank, the MBR membrane tank 6, the sludge tank and the RO reverse osmosis system 7 are integrated in the container;

[0043] The pretreatment device is arranged outside the container, and an equipment room is also provided in the container, in which a driving device and an electronic control device are provided; the pretreatment device, the regulating tank 3, the hydrolysis acidification tank 4, the inclined plate sedimentation tank 5, the primary AO biochemical treatment tank, the MBR membrane tank 6 and the RO reverse osmosis system 7 are all installed with a monitoring system and a dosing device system. The control system is respectively connected to the electronic control device, the driving device, the monitoring system and the dosing device system, and is used to monitor water quality parameters in real time through the monitoring system, control and adjust the wastewater treatment process through the electronic control device according to the parameters, and drive the dosing device corresponding to each process to add drugs, so that the system has good automatic control and intelligent management functions, solves the problem of industrial wastewater pollution, and makes the wastewater meet the industrial water standard requirements after being treated by the system;

[0044] It should be noted that the control system is a PLC control system, the driving device is a driving motor, and the electronic control equipment includes a solenoid valve, an automatic valve group, a temperature transmitter, a pressure transmitter, and a liquid level transmitter; the electronic control equipment is installed in the multi-effect evaporator 1, the basket filter 2, the regulating tank 3, the hydrolysis acidification tank 4, the inclined plate sedimentation tank 5, the primary AO biochemical treatment tank, the MBR membrane tank 6, and the RO reverse osmosis system 7, respectively, and the driving motor drives the electronic control equipment through the PLC control system;

[0045] The monitoring system includes pH meter, liquid level meter, flow meter, conductivity meter, dissolved oxygen meter, and thermometer;

[0046] Among them, dissolved oxygen meters are installed in the primary AO biochemical treatment tank and the MBR membrane tank 6, respectively; pH meters, liquid level meters, flow meters, conductivity meters and thermometers are installed in the multi-effect evaporator 1, basket filter 2, regulating tank 3, hydrolysis acidification tank 4, inclined plate sedimentation tank 5 and RO reverse osmosis system 7, respectively; water quality parameters are monitored in real time through the monitoring system, and the wastewater treatment process is adjusted according to the monitored real-time water quality parameters through the control system;

[0047] The dosing system is an existing device and is available in large quantities on the market. The dosing system is configured in a mixing tank according to the required concentration of the drug. After being evenly stirred by a stirrer, the solution is added to a solution tank and transported to the dosing point or a certain system using a metering pump. The dosing system is connected to a control system, which monitors the real-time water quality parameters and adds drugs to the equipment corresponding to each process.

[0048] The first-level AO biochemical treatment pool includes a first-level anoxic pool 10 and a first-level aerobic pool 11 connected in sequence;

[0049] Wherein, a reflux pipe 12 is provided between the primary anoxic tank 10 and the MBR membrane tank 6;

[0050] The pretreatment device includes a multiple-effect evaporation system and a filtration system;

[0051] The multiple-effect evaporation system is a multiple-effect evaporator 1, and the filtration system is a basket filter 2;

[0052] The multi-effect evaporator 1 is used to evaporate and concentrate high-salt wastewater to remove salt;

[0053] The basket filter 2 is connected to the water outlet of the multi-effect evaporator 1 to remove large suspended solids and impurities in the wastewater. The water outlet of the basket filter 2 is connected to the regulating tank 3.

[0054] The sludge treatment device includes a sludge dewatering system 15. The discharge port of the sludge tank is connected to the regulating tank 3 through a recycling pipe 13, and the second pipe of the sludge tank is connected to the sludge dewatering system 15. The sludge discharge pipe of the sludge dewatering system 15 is connected to the dry mud transfer device 9 through the sludge output device for sludge treatment.

[0055] It should be noted that the sludge-water mixture discharged into the sludge tank 14 is precipitated, and the supernatant overflows into the regulating tank 3. The sludge in the sludge tank 14 is partially pumped by the sludge transfer pump to the sludge dewatering system 15 for treatment. The sludge output end of the sludge dewatering system 15 is connected to the dry sludge transfer device 9, and a portion of the sludge is sent to the hydrolysis and acidification tank 4. The sludge dewatering system 15 is equipped with a sludge dewatering machine, and the dry sludge transfer device 9 is a sludge transfer vehicle used to transfer the sludge to the landfill for treatment.

[0056] The hydrolysis and acidification tank 4 and the primary anoxic tank 10 are both equipped with stirring devices to allow the wastewater to fully contact with anaerobic microorganisms and to accelerate the escape of gas from the decomposition of organic matter in the wastewater;

[0057] It should be noted that the stirring device is a mechanical stirring device, which stirs the wastewater in the water to circulate the wastewater, so that the wastewater is fully in contact with anaerobic microorganisms, which is used to accelerate the escape of gas from the decomposition of organic matter in the wastewater and improve the degradation efficiency. In this way, organic matter that is not easily degradable is converted into organic matter that is easily degradable, and indicators such as various organic matters are greatly reduced, which is beneficial to the treatment of subsequent process units. The wastewater enters the primary anoxic tank 10 and the primary aerobic tank 11 in sequence from the hydrolysis and acidification tank 4;

[0058] The regulating tank 3, hydrolysis acidification tank 4, inclined plate sedimentation tank 5, primary AO biochemical treatment tank and MBR membrane tank 6 are all separated by partitions and connected through openings on the partitions according to the direction of wastewater treatment flow;

[0059] The method of the integrated industrial wastewater treatment system comprises the following steps:

[0060] S1, pretreatment isolation section: high-salt wastewater is added and pretreated. The high-salt wastewater is treated in the multi-effect evaporator 1 and then flows through the basket filter 2 with other wastewater into the regulating tank 3 for homogenization and water volume adjustment. The wastewater is then transported to the hydrolysis acidification tank 4 via the sewage lift pump.

[0061] S2, anaerobic treatment: Hydrolysis and acidification tank 4 contains a large number of hydrolytic and acidifying bacteria. These bacteria use chemical methods to hydrolyze insoluble organic matter into soluble organic matter, converting difficult-to-biodegrade macromolecules into easily biodegradable small molecules. This improves the biodegradability of the wastewater and lays a good foundation for subsequent treatment. To ensure sufficient contact between the wastewater and the anaerobic microorganisms and achieve optimal mass transfer, a mixer is installed within the tank for mechanical mixing. The effluent then flows through inclined plate sedimentation tank 5 and flows by gravity into the anoxic tank (primary anoxic tank 10).

[0062] S3, primary AO biochemical treatment section: In the primary anoxic tank 10 (primary A tank), denitrification occurs through the action of denitrifying bacteria and nitrifying bacteria. Simultaneously, nitrite and nitrate nitrogen, biologically nitrified, are converted into nitrogen gas by anaerobic bacteria. Undecomposed macromolecular organic matter in the water is hydrolyzed and acidified by anaerobic bacteria, converting it into small-molecule organic matter. To ensure sufficient contact and reaction between the mud and water phases, a mixer is installed in the tank to improve mass transfer. The effluent flows by gravity into the two-stage aerobic tank (primary aerobic tank 11).

[0063] In the primary aerobic tank 11 (primary O tank), aerobic bacteria metabolize and fully decompose organic carbon compounds in the wastewater. Aerobic nitrifying bacteria then convert ammonia nitrogen in the wastewater into nitrate and nitrite nitrogen. Disc-type microporous aerators are installed at the bottom of each tank. The disc base and aeration piping must be securely fastened to prevent air pressure from dislodging the disc. Aeration is supplied by a Roots blower, and the aeration volume is controlled by a valve. The nitrified liquid has a 200% return ratio and is returned to the anoxic tank. The effluent from the aerobic tank flows by gravity into the MBR tank.

[0064] S4, MBR membrane treatment section: The wastewater is treated in MBR membrane tank 6. Remaining organic pollutants and ammonia nitrogen in the wastewater are further degraded and transformed by a rich, high-density microorganism system within the tank. Suspended solids are trapped within the MBR membrane tank 6, ensuring consistent effluent quality. The MBR membrane system in MBR tank 6 includes a membrane filtration system, backwash system, chemical cleaning system, aeration system, and sludge return system. The sludge return, as a sludge-water mixture, is returned to the anoxic tank at a 100% return ratio for activated sludge replenishment. Discharge operations are carried out as appropriate based on the specific sludge content, with a portion of the sludge discharged as residual sludge to the sludge thickening tank. Product water is extracted by a suction pump and passed through an activated carbon filter tank for further contaminant removal before being discharged to the product water tank.

[0065] S5, reverse osmosis treatment section: The water produced by the MBR membrane pool 6 is discharged into the RO reverse osmosis system 7. The sewage first passes through the filter of the RO reverse osmosis system 7 to intercept impurities in the water and protect the reverse osmosis membrane. It then enters the reverse osmosis membrane system through a high-pressure pump to remove most of the ions and other smaller pollutants in the water.

[0066] S6, Sludge Treatment: Reverse osmosis water enters the reuse water tank in the reuse water system 8 and is delivered to the water demand point. The sludge-water mixture discharged into the sludge tank 14 undergoes sedimentation, and the supernatant overflows into the regulating tank 3. The sludge in the sludge tank 14 is partially pumped by a sludge transfer pump to the sludge dewatering system 15 for treatment, and the remaining sludge is delivered to the hydrolysis and acidification tank 4.

[0067] This integrated industrial wastewater treatment system is suitable for the treatment of the following water qualities. After biochemical treatment and deep treatment, the wastewater can meet the process and product water standards in "Water Quality for Industrial Water Use in Municipal Wastewater Recycling" (GB / T19923-2005), as shown in the following table:

[0068]

[0069] It is worth noting that the integrated industrial wastewater treatment system sequentially connects the pretreatment device, regulating tank, hydrolysis acidification tank, inclined plate sedimentation tank, primary AO biochemical treatment tank, MBR membrane tank, and RO reverse osmosis system through pipelines. It integrates physical treatment, chemical treatment, and biological treatment to treat wastewater. The physical treatment removes salt, large suspended solids, and impurities in the wastewater through the pretreatment device. The chemical treatment degrades organic matter in the wastewater through the hydrolysis acidification tank. The biological treatment degrades organic matter and nitrogen and phosphorus substances in the wastewater through the AO biochemical treatment tank. The MBR membrane tank is set to make the wastewater meet the effluent standards.

[0070] The pretreatment device is set outside the container, and an equipment room is also set inside the container. A driving device is set in the equipment room; it is used to drive the operation of the electronic control equipment in the container and monitor the water quality parameters in real time, and automatically adjust the treatment process, so that the system has good automatic control and intelligent management functions. The system solves the problem of industrial wastewater pollution and adopts a single wastewater treatment technology. The wastewater treatment capacity is 200m 3 / d~220m 3 / d. Under the same specifications, the wastewater treatment capacity of the wastewater treatment system of this application is 250m 3 / d, improving wastewater treatment efficiency and ensuring that wastewater meets industrial water standards after treatment by the system.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of protection of the present invention.

Claims

1. An integrated industrial wastewater treatment system, characterized in that: It includes a pretreatment device, a regulating tank, a hydrolysis acidification tank, an inclined plate sedimentation tank, a primary AO biochemical treatment tank, an MBR membrane tank, and a RO reverse osmosis system connected in sequence through pipelines; The pretreatment device is used to remove salt, large suspended particles and impurities from the wastewater; The regulating tank is used to homogenize and regulate the flow of wastewater; The hydrolysis and acidification tank is used to degrade organic matter in wastewater; The inclined plate sedimentation tank is used to remove suspended matter and sediment in water; The AO biochemical treatment pool is used to degrade organic matter and nitrogen and phosphorus substances in wastewater; The MBR membrane tank is used to make the wastewater meet the effluent standards; The RO reverse osmosis system is used to ensure that the water quality reaches the drinking water standard; the pure water outlet of the RO reverse osmosis system is connected to the recycled water system for recycling the treated water, and the concentrated water outlet of the RO reverse osmosis system is connected to the multi-effect evaporation system; The wastewater treatment system further comprises a sludge tank, wherein the feed port of the sludge tank is connected to the mud outlets of the inclined plate sedimentation tank and the MBR membrane tank respectively through pipelines, and the discharge port of the sludge tank is connected to the sludge treatment device; A container, wherein the regulating tank, hydrolysis acidification tank, inclined plate sedimentation tank, primary AO biochemical treatment tank, MBR membrane tank, sludge tank and RO reverse osmosis system are integrated in the container; Among them, the pretreatment device is arranged outside the container, and an equipment room is also provided in the container, in which a driving device and an electronic control device are provided; the pretreatment device, regulating tank, hydrolysis acidification tank, inclined plate sedimentation tank, primary AO biochemical treatment tank, MBR membrane tank and RO reverse osmosis system are all installed with a monitoring system and a dosing device system, and the control system is respectively connected to the electronic control equipment, driving device, monitoring system and dosing device system, and is used to monitor water quality parameters in real time through the monitoring system, control and adjust the wastewater treatment process through the electronic control equipment according to the parameters, and drive the dosing device corresponding to each process to add medicine.

2. The integrated industrial wastewater treatment system according to claim 1, characterized in that: The primary AO biochemical treatment pool includes a primary anoxic pool and a primary aerobic pool connected in sequence. The water outlet of the aerobic pool is connected to the water inlet of the MBR membrane pool through a pipeline. A reflux pipeline is provided between the primary anoxic pool and the MBR membrane pool.

3. The integrated industrial wastewater treatment system according to claim 1, characterized in that: The pretreatment device includes a multiple-effect evaporation system and a filtration system; The multiple-effect evaporation system is a multiple-effect evaporator, and the filtration system is a basket filter; The multi-effect evaporator is used to evaporate and concentrate high-salt wastewater to remove salt; The basket filter is connected to the water outlet of the multiple-effect evaporator and is used to remove large suspended particles and impurities in the wastewater. The water outlet of the basket filter is connected to the regulating tank.

4. The integrated industrial wastewater treatment system according to claim 1, characterized in that: The sludge treatment device includes a sludge dewatering system, the discharge port of the sludge tank is connected to the regulating tank through a recycling pipe, and the second pipe of the sludge tank is connected to the sludge dewatering system, and the sludge discharge pipe of the sludge dewatering system is connected to the dry mud transfer device through a sludge output device.

5. The integrated industrial wastewater treatment system according to claim 2, characterized in that: The hydrolysis and acidification tank and the primary anoxic tank are both equipped with stirring devices to allow the wastewater to fully contact with anaerobic microorganisms, thereby accelerating the escape of gas generated by the decomposition of organic matter in the wastewater.

6. The integrated industrial wastewater treatment system according to claim 1, characterized in that: The regulating tank, hydrolysis acidification tank, inclined plate sedimentation tank, primary AO biochemical treatment tank and MBR membrane tank are all separated independently by partitions and connected through openings on the partitions according to the direction of wastewater treatment flow.

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