Anaerobic electrochemical sludge disposal device of electrode coupled flat sheet membrane

Abstract

The invention discloses an anaerobic electrochemical sludge disposal device of an electrode coupled flat sheet membrane. The device is characterized in that membrane hanging electrodes formed by carbon felts and titanium nets are arranged on two sides of the flat sheet membrane; the membrane hanging electrodes and a flat sheet membrane assembly are supported by two fixed baffle plates and are arranged above an aerating pipe; the carbon felts / carbon cloth are / is arranged on two sides of the flat sheet membrane assembly at an interval of 10-15 mm; the titanium nets are attached to the outer sides of the carbon felts / carbon cloth. Compared with the prior art, the anaerobic electrochemical sludge disposal device has an electric active biological membrane structure, enriches the microbial population diversity, domesticates electric active microorganisms directionally, stabilizes the metabolic environment of anaerobes inside quickly, improves the inner digestion efficiency, and can reduce deposition of flocs, colloids and the like on the flat sheet membrane, alleviates membrane pollution, improves the primer digestion efficiency, improves the effluent quality, and achieves methanation ofCO2 and in-situ upgraded purification of biogas, so that CO2 emission is reduced and recycle of a biological energy source is enhanced.

Description

technical field [0001] The invention relates to the technical fields of membrane separation and anaerobic electrochemistry, in particular to an anaerobic electrochemical sludge treatment device with a membrane-mounted electrode coupled with a flat membrane. [0002] Background technique: [0003] Anaerobic membrane bioreactors (AnMBRs) were first proposed by Grethlein et al. in the 1970s. After continuous improvement and perfection, they have been extensively studied and successfully applied in the anaerobic treatment of industrial wastewater and domestic sewage. This technology mainly relies on the interception of macromolecular substances by the fine membrane pore size and the anaerobic digestion of biomass waste such as sludge in the reactor in an anaerobic environment to improve the treatment effect of the substrate. Compared with the aerobic process and the traditional anaerobic process, the anaerobic membrane bioreactor process has multiple advantages, such as more stab...

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Problems solved by technology

[0004] The Chinese patent "A Separate Anaerobic Ceramic Membrane Bioreactor That Can Effectively Mitigate Membrane Fouling" (application publication number CN 108191055 A, application publication date 2018.06.22) proposes a combination of ceramic membrane and anaerobic bioreactor to A method of alleviating membrane fouling. This method achieves the purpose of alleviating membrane fouling through the thinner thickness of the ceramic membrane module itself, and at the same time, the reflux of the reactor’s continuous inflow of water to scour the membrane surface. The disadvantage lies in the high cost and scouring of the ceramic membrane. High energy consumption, difficult to be applied in engineering

[0005] The Chinese patent "A Folded-Plate Membrane Module for Reducing Membrane Fouling in a Membrane Bioreactor" (application publication number CN 104876327A, application publication date 2015.09.02) proposes a combination of a folded-plate membrane module and a membrane reactor to slow down membrane fouling The method, which reduces the deposition of particles on the membrane surface by increasing the cross-flow rate of the fluid near the membrane surface and enhancing the turbulent disturbance effect of the fluid near the membrane surface, thereby slowing down the membrane fouling, prolonging the service life of the membrane module, and greatly reducing the Its operating cost, the disadvantage is that the manufacturing of the folded plate membrane module is relatively complicated and the cost is high

In this method, the rotary shearing force is increased by rotating the membrane filter module, and the three-phase separator is used as the air washing source of the membrane module. At the same time, online ultrasonic cleaning and chemical cleaning equipment are installed to reduce the disassembly and assembly process in the membrane cleaning process, thereby To achieve the purpose of slowing membrane fouling, the disadvantage is that the process is more complicated, the expanded area is large, and the energy demand is high

[0007] The Chinese patent "A Rotating Electrode Coupled Flat Membrane System for Treating Sludge" (application publication number CN 103979762A, application publication date 2014.08.13) provides a method for improving the reactor treatment effect by combining a rotating electrode with a flat membrane. Apply an electric field in the sludge, use the anode electrochemistry and electroflocculation technology and the rotation effect of the electrode to improve the digestion efficiency of the sludge, the effluent water quality and the subsequent dehydration performance, and at the same time slow down the membrane fouling. not suitable for general use

[0008] To sum up, in the existing technology, the structure of the membrane module is complex, the cost is high, the process is relatively complicated, the energy consumption is high, the operating cost is high, and it is difficult to put it into large-scale application.

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