CN-224212509-U - Biochemical treatment device for organic cleaning wastewater

Abstract

The utility model provides a biochemical treatment device for organic cleaning wastewater with high-efficiency denitrification and dephosphorization, which adopts an innovative structure of a hydrolysis acidification coupling double-stage aerobic and MBR-TMF double-membrane system. The device is formed by sequentially connecting a wastewater regulating tank, a hydrolysis acidification tank, a primary aerobic tank, an anoxic tank, a secondary aerobic tank, an MBR membrane tank, a TMF circulating tank and a clean water tank in series, wherein biological fillers are arranged in the primary/secondary aerobic tank to realize organic matter degradation, and the MBR membrane tank realizes mud-water separation through an MBR membrane component. According to the utility model, through the cooperation of the MBR and the TMF double membranes, the TMF circulating pump returns the concentrated solution to the front end of the MBR to realize secondary degradation of pollutants, the recovery rate of the system is improved by 15-20%, a 'hydrolytic acidification + double-stage aerobic + anoxic' biochemical unit is constructed, the double-stage aerobic realizes the gradient control of dissolved oxygen through independent aeration, and a complete nitrification-denitrification system is formed with an anoxic tank.

Inventors

• DA YONG
• XIA XIAOJUN

Assignees

• 江苏圣富利环境工程有限公司

Dates

Publication Date

20260508

Application Date

20250416

Claims (10)

1. 1. The biochemical treatment device for the organic cleaning wastewater is characterized by comprising a wastewater regulating tank, a hydrolysis acidification tank, a primary aerobic tank, an anoxic tank, a secondary aerobic tank, an MBR membrane tank, a TMF circulating tank and a clean water tank which are communicated sequentially through pipelines; The primary aerobic tank and the secondary aerobic tank are respectively provided with an aerobic tank filler, an MBR membrane assembly is arranged in the MBR membrane tank, and a water outlet of the MBR membrane assembly is connected to the clean water tank through a suction pump.
2. 2. The biochemical treatment device for organic cleaning wastewater according to claim 1, wherein the MBR membrane module is selected from a hollow fiber membrane module or a flat plate membrane module.
3. 3. The biochemical treatment device for organic cleaning wastewater according to claim 1, wherein the MBR membrane tank is further provided with a sludge reflux pump, and the sludge reflux pump is connected back to the primary aerobic tank through a pipeline.
4. 4. The biochemical treatment device for organic cleaning wastewater according to claim 1, wherein the TMF circulating tank is internally provided with a TMF membrane module, a TMF circulating pump is arranged at the bottom of the TMF circulating tank, and the TMF circulating pump pumps concentrated water in the TMF circulating tank back to the front end of the MBR membrane tank through a pipeline.
5. 5. The biochemical treatment device for organic cleaning wastewater according to claim 4, wherein the TMF membrane module comprises tubular ultrafiltration membrane modules arranged in an array along a wastewater flow direction.
6. 6. The biochemical treatment device for organic cleaning wastewater according to claim 5, wherein the TMF circulating tank is further provided with a pulse back flushing system, and the pulse back flushing system is respectively connected with a water pump and a fan through a high-pressure water pipe and a compressed air pipe and is used for carrying out water-air combined pulse back flushing on the tubular ultrafiltration membrane component.
7. 7. The biochemical treatment device for organic cleaning wastewater according to claim 4, wherein a prefilter screen is arranged at the inlet of the TMF circulating tank, and the filter precision of the prefilter screen is 50-100 μm.
8. 8. The biochemical treatment device for organic cleaning wastewater according to claim 1, wherein the anoxic tank is provided with a nitrifying liquid reflux pump, and the nitrifying liquid reflux pump is connected back to the hydrolytic acidification tank through a pipeline.
9. 9. The biochemical treatment device for organic cleaning wastewater according to claim 1, wherein an aeration pipeline is arranged in at least one of the primary aerobic tank, the secondary aerobic tank, the MBR membrane tank and the TMF circulating tank, and the aeration pipeline is connected with the output end of the aeration fan through a gas pipe.
10. 10. The biochemical treatment device for organic cleaning wastewater according to claim 9, wherein the aeration pipes are independently provided in the primary aerobic tank and the secondary aerobic tank, respectively, and form a dissolved oxygen gradient control structure.

Description

Biochemical treatment device for organic cleaning wastewater Technical Field The utility model relates to the technical field of wastewater treatment devices, in particular to a biochemical treatment device for organic cleaning wastewater. Background The organic cleaning wastewater contains high-concentration COD, total Nitrogen (TN), total Phosphorus (TP) and refractory organic matters, and the traditional process has the problems of low denitrification and dephosphorization efficiency, complex flow, unstable water output and the like. In the prior art, a single aerobic or anaerobic process is difficult to realize high-efficiency denitrification and dephosphorization simultaneously, and an MBR membrane tank usually operates independently, so that the cooperative optimization of sludge reflux and nitrifying liquid reflux is insufficient. The patent of the utility model with the publication number of CN222250275U achieves the aim of purifying water quality by arranging a hydrolytic acidification tank and an aerobic tank and utilizing microorganisms in the aerobic tank to adsorb organic pollutants in water, thereby improving the removal capability of total nitrogen and total phosphorus. However, the lack of a filtration system in the art is not directly applicable to the cleaning water of the electronics industry. Disclosure of utility model The utility model aims to overcome the defects of the prior art and provide the biochemical treatment device for the organic cleaning wastewater, which improves the denitrification and dephosphorization efficiency through the coupling of multistage biochemical reaction and MBR membrane separation. In order to achieve the above purpose, the technical scheme provided by the utility model is as follows: An organic cleaning wastewater biochemical treatment device comprises a wastewater regulating tank, a hydrolysis acidification tank, a primary aerobic tank, an anoxic tank, a secondary aerobic tank, an MBR membrane tank, a TMF circulating tank and a clean water tank which are sequentially communicated; The device is characterized in that aerobic tank fillers are arranged in the primary aerobic tank and the secondary aerobic tank, an MBR membrane module is arranged in the MBR membrane tank, a TMF membrane module is arranged in the TMF circulating tank, a TMF circulating pump is arranged at the bottom of the TMF circulating tank, and the TMF circulating pump pumps concentrated water in the TMF circulating tank back to the front end of the MBR membrane tank. Further, the water outlet of the MBR membrane component is connected to a clean water tank through a suction pump. Further, the MBR membrane module includes a hollow fiber membrane module or a flat plate membrane module. Furthermore, the MBR membrane tank is also provided with a sludge reflux pump, and the sludge reflux pump is connected back into the primary aerobic tank. Further, the TMF membrane component comprises tubular ultrafiltration membrane components which are arranged in an array along the flowing direction of the wastewater. Furthermore, the TMF circulating tank is also provided with a pulse back flushing system, the pulse back flushing system is connected with a water pump and a fan, and the water pump and the back flushing fan respectively impact the tubular ultrafiltration membrane component through high-pressure water and compressed air colloid and are used for carrying out water-air combined pulse back flushing on the tubular ultrafiltration membrane component. Further, the inlet of the TMF circulating tank is provided with a prefilter screen, and the filtering precision of the prefilter screen is 50-100 mu m. The TMF circulating tank is also provided with a pulse back flushing system, and the pulse back flushing system is respectively connected with a water pump and a fan through a high-pressure water pipe and a compressed air pipe and is used for carrying out water-air combined pulse back flushing on the tubular ultrafiltration membrane component. Furthermore, the anoxic tank is also provided with a nitrifying liquid reflux pump, and the nitrifying liquid reflux pump is connected back to the hydrolysis acidification tank. Further, at least one of the primary aerobic tank, the secondary aerobic tank, the MBR membrane tank and the TMF circulating tank is provided with an aeration pipeline, and the aeration pipeline is connected with the output end of the aeration fan through a gas pipe. Furthermore, the aeration pipelines are respectively and independently arranged in the primary aerobic tank and the secondary aerobic tank, and the dissolved oxygen gradient control structure is realized through the aeration fans which are respectively connected. Further, the prefilter screen is detachably arranged at the inlet end of the TMF circulating tank. The utility model has the advantages and beneficial effects that: 1. The MBR+TMF double-membrane system forms a treatment barrier, and the TMF circulating pump returns