Technique for treating fermentation wastewater by microbial fuel cell

Abstract

The invention discloses a technique for treating fermentation wastewater by a microbial fuel cell, and relates to a technique for treating wastewater. The method comprises the steps as follows: with conductive glass, carbon cloth or a carbon felt as electrode materials, active groups, polyelectrolyte multilayer films or nanoparticles/polyelectrolyte multilayer films are respectively modified on the electrode materials by an alkaline hydrolysis method, an acid hydrolysis method and a layer-by-layer self-assembly technique; the series materials are applied to an anode of a microbial fuel cell reaction device to treat the fermentation wastewater; with sodium acetate and lotus pond sludge as substrates, a microbial fuel cell system with a relatively high electricity generating rate, relatively good chemical oxygen demand (COD) removal effects and relatively high coulombic efficiency is obtained. The microbial fuel cell system is good in process repeatability, safe and reliable; the fermentation wastewater is treated; meanwhile, a relatively high electricity generating quantity and a relatively high electricity generating rate are achieved; the problems that the traditional microbial fuel cell is low in electricity generating efficiency and low in sewage COD removal rate are effectively solved; and the technique has a good industrial application prospect.

Description

technical field [0001] The invention relates to a process for treating waste water, in particular to a process method for treating fermentation waste water with a microbial fuel cell. Surface activation and modification of anode materials for microbial fuel cells, and construction of microbial fuel cell treatment of fermented sewage systems. In particular, it involves the activation of conductive glass by alkaline hydrolysis, the activation of carbon cloth or carbon felt by acid hydrolysis, the modification of conductive glass, carbon cloth, and carbon felt anode layer by layer self-assembled multi-layer film, and the treatment of sewage sludge generated from lotus pond sludge, microbial domestication liquid, and fermented sewage. Anode substrate system, and process design of microbial fuel cell treatment of fermentation wastewater. Background technique [0002] Microbial fuel cell (MFC) is a device that uses microorganisms as an anode catalyst to directly convert the chemi...

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Problems solved by technology

Studies have shown that the surface of existing anode materials usually lacks active groups and is relatively hydrophobic, which greatly hinders the attachment and film formation of conductive microorganisms. However, the surface of the material can be activated by alkaline hydrolysis and acid hydrolysis, which can be greatly improved. The hydrophilic property of the material, thus accelerating the attachment of microorganisms

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