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Method for treating degradation-resistant organic wastewater by membrane potential biological coupling process

A kind of organic wastewater, refractory technology, applied in the direction of electrochemical bio-combination treatment, biological water/sewage treatment, chemical instruments and methods, etc., can solve the problem of sludge microbial enrichment, high content of suspended solids in effluent, and impact of sludge microbial To achieve the effect of improving the sewage treatment effect, stabilizing the effluent water quality and improving the efficiency

Inactive Publication Date: 2015-01-07
TIANJIN POLYTECHNIC UNIV
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Problems solved by technology

Refractory organic wastewater affects the sludge-water separation of sludge microorganisms due to its water quality characteristics, resulting in a high content of suspended solids in the effluent after biological treatment, which affects both effluent water quality and the enrichment of sludge microorganisms in the biodegradation system

Method used

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  • Method for treating degradation-resistant organic wastewater by membrane potential biological coupling process

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Embodiment 1

[0011] Coking chemical organic wastewater is treated by membrane electrobiological coupling process, with a treatment volume of 15m 3 / h. The organic wastewater contains phenol, cyanide, chlorophenol, coal tar and other organic matter, COD Cr The content is between 1500~3000mg / L. The residence time of coking chemical organic wastewater in the reactor is 20h, the hydraulic retention time in the anaerobic zone and the aerobic zone are both 10h, the microbial concentration in the anaerobic zone is between 3000-5000mg / L, and the microbial concentration in the aerobic zone is 2000 ~4000mg / L. The stirring power in the anaerobic zone is 150W, the gas-water ratio of aeration in the aerobic zone is 8:1, the cathode plate is made of titanium-based palladium-plated mesh flat plate, the anode is made of graphite plate, and the voltage applied by the DC power supply is 1.2V.

[0012] After commissioning and stable operation, the water quality of membrane effluent is as follows: phenol ...

Embodiment 2

[0014] The sewage from the printing and dyeing wastewater treatment station contains disperse blue ionic dyes with a chroma of 300 to 500 times and COD Cr 300~500mg / L, SS 130mg / L, treated water volume 200m 3 / d, BOD / COD is 0.25, poor biochemical properties. The original treatment process adopts the process of coagulation sedimentation-microbial anaerobic degradation-microbial aerobic degradation, and the effluent COD Cr The concentration is 100-150mg / L, and the effluent color is high, which does not meet the requirements of environmental protection discharge. In order to improve the removal effect, the electric biofilm filtration coupling process of the invention is used for transformation. A drum-shaped mesh titanium-based palladium-plated cathode plate is installed in the anaerobic reactor, and a mesh steel plate is installed as an anode in the aerobic tank. The regulated DC voltage provides a voltage of 1.5V. After the installation of the pole plate was completed, after ...

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Abstract

The invention relates to a method for treating degradation-resistant organic wastewater by a membrane potential biological coupling process. The method is characterized in that membrane potential biological coupling process comprises two zones, namely the anaerobic zone and the aerobic zone; a cathode plate is placed in the anaerobic zone; a filtering membrane and an anode plate are placed in the aerobic zone; the average pore size of the membrane is 0.1-0.4 microns; during membrane filtration, negative pressure suction is used for filtering the wastewater. The method is provided on the basis of adoption of electrically-assisted reinforcing microorganisms for reduction and oxydative degradation of degradation-resistant biological wastewater and a coupling membrane filtration technology, complete separation of anaerobic and aerobic microorganisms is achieved, the membrane filtration outlet water is used, and a process flow is simplified; by the method, CODCr removing rate in the degradation-resistant organic wastewater is more than 90%, and the removal rate of chroma is more than 95%; through electrobiological enhanced degradation, the wastewater treatment effect is good and membrane pollution is controlled relatively better; through membrane outlet water, the solid-liquid separating efficiency is improved and the water quality of the outlet water is stable.

Description

technical field [0001] The invention relates to a method for treating refractory organic wastewater by a membrane-electrobiological coupling process. The method is mainly developed by using electric-assisted microorganisms (electrobiology) to strengthen the reduction and oxidative degradation process of refractory organic wastewater and coupling membrane filtration technology. In the field of environmental protection, Background technique [0002] With the development of social industry, the treatment of refractory organic matter in the water environment is a difficult point in environmental governance. In view of the increasing diversification of industrial wastewater containing refractory organic matter and the increasing difficulty of biochemical treatment, especially medical wastewater, printing and dyeing wastewater, Chemical and fuel wastewater, etc. The wastewater has complex components, large chroma, and high biological toxicity. The effect of conventional biologica...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F101/30
CPCC02F9/00C02F3/005C02F3/1268C02F3/1278C02F3/2853C02F2101/30
Inventor 曹占平张景丽王晶张明慧李松松武静明
Owner TIANJIN POLYTECHNIC UNIV
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