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Organic wastewater treatment device coupled with low-energy-consumption membrane biological reactor of microbial fuel cell

A technology for membrane bioreactor and organic wastewater treatment, which is applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problem of inability to effectively remove suspended solids, difficulty in reusing effluent or Emissions and other issues, to achieve the effect of reducing construction costs, reducing operating costs, and simple structure

Inactive Publication Date: 2014-06-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as one of the anaerobic biological treatment technologies, MFC is difficult to obtain excellent effluent quality. If it is combined with nitrification process, sequencing batch reactor, biological turntable, biological contact oxidation, etc. In the aeration tank, the water quality of the MFC effluent can be improved, but the above-mentioned processes cannot effectively remove the suspended solids in the effluent of the system, and the effluent is difficult to reuse or discharge

Method used

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  • Organic wastewater treatment device coupled with low-energy-consumption membrane biological reactor of microbial fuel cell

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1: MFC anode (2) adopts carbon felt, deflector (8) adopts 3 pieces of cross arrangement, MBR membrane module (9) and MFC cathode adopt graphene, polyvinylidene fluoride 1: 2 mixed modification non-woven fabric . The water quality of the system is as follows: COD concentration is 500mg / L, ammonia nitrogen is 20mg / L, and the pH value is 7; the HRT of the MFC anode chamber is 8h; the HRT of the baffle area is 10h, and the dissolved oxygen concentration is 0.2mg / L; the MBR unit The HRT is 6h, the dissolved oxygen concentration is 4.0mg / L; the temperature is 25°C.

Embodiment 2

[0018] Example 2: The MFC anode (2) is made of carbon cloth, the deflector (8) is arranged in five intersections, and the MBR membrane module (9) and the MFC cathode are made of polyaniline-modified stainless steel mesh. The water quality of the system feed water is as follows: COD concentration is 1000mg / L, ammonia nitrogen is 50mg / L, and the pH value is 8; the HRT of the MFC anode chamber is 10h; the HRT of the baffle area is 12h, and the dissolved oxygen concentration is 0.5mg / L; the MBR unit The HRT is 8h, the dissolved oxygen concentration is 2.0mg / L; the temperature is 30℃.

Embodiment 3

[0019] Example 3: The MFC anode (2) is made of graphite, the deflector (8) is arranged in 7 intersections, and the MBR membrane module (9) and the MFC cathode are made of graphene-modified carbon cloth. The water quality of the system inlet water is as follows: COD concentration is 10000mg / L, ammonia nitrogen is 2000mg / L, and the pH value is 9; the HRT of the MFC anode chamber is 22h; the HRT of the baffle area is 18h, and the dissolved oxygen concentration is 0.1mg / L; the MBR unit The HRT is 12h, the dissolved oxygen concentration is 6.0mg / L; the temperature is 35°C.

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Abstract

The invention provides an organic wastewater treatment device coupled with a low-energy-consumption membrane biological reactor of a microbial fuel cell and belongs to the technical field of recycling organic wastewater resources. The invention aims to solve problems that the microbial fuel cell (MFC) is poor in outlet water quality, the membrane biological reactor (MBR) is high in energy consumption and membrane pollution is serious; according to the device disclosed by the invention, a cell body, an MFC anode and a guide plate form an anode chamber which is an anaerobic reaction region; the guide plate, the MBR membrane assembly (also an MFC cathode) and an aerator pipe form a cathode chamber which is an aerobic reaction region; the guide plate region is an anoxic reaction region; meanwhile, a baffle plate is adopted to replace a proton exchange membrane in the MFC, so that system denitrification effect is good, and construction cost is low; compared with the conventional MBR system, the organic wastewater treatment device has the advantages that energy consumption of treatment of one ton of wastewater is lowered by 30%-70%, and outlet water quality reaches grade A in pollution discharge standards (GB18918-002) of a municipal sewage treatment plant in China.

Description

technical field [0001] The invention relates to an organic wastewater treatment device coupled with a low-energy consumption membrane bioreactor of a microbial fuel cell, belonging to the technical field of organic wastewater treatment. Background technique [0002] In recent years, as an advantageous combination of wastewater physical and biological treatment technologies, the Membrane Bioreactor (Membrane Bioreactor) is known for its low yield of excess sludge and high-efficiency denitrification, and its ultimate goal is to turn sewage into a resource (or reuse) and make it harmless. , MBR) technology has been widely used in the field of sewage treatment. According to statistics, more than 300 MBR sewage treatment projects have been put into operation or under construction in my country, of which nearly 10 are nearly 10,000-ton MBR systems. However, domestic and foreign practices have shown that operating costs and membrane fouling are always the main obstacles restrictin...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 李秀芬赵亚楠任月萍王新华
Owner JIANGNAN UNIV
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