Sleeve type microbial fuel cell for synchronous short-cut nitrification and biological denitrification and method thereof

Abstract

The invention belongs to the technical field of sewage treatment and particularly relates to a sleeve type microbial fuel cell for synchronous short-cut nitrification and biological denitrification and a method thereof. The internal and external sleeve type microbial fuel cell is adopted, short-cut nitrification and biological denitrification can be performed and are combined with a membrane aeration biological membrane technology and a biological cathode process; during a nitration stage, by controlling process conditions such as intramembrane oxygen partial pressure, inflow pH, dissolved oxygen concentration, inflow ammonia concentration and reaction temperature, oxidation of ammonia is controlled at a nitrosation stage and then nitrogen removal by denitrification is performed. While biological resources in sewage can be utilized to generate electric energy, not only are carbon-containing organic compounds in sewage removed efficiently, but also nitration reaction and denitrification reaction are performed synchronously, and an effect of improving total nitrogen removal rate and ammonia removal rate is achieved. Through the method, the total nitrogen removal rate and the COD removal rate of wastewater are very remarkable.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a sleeve-type microbial fuel cell for short-range nitrification biological denitrification and a process method thereof. Background technique [0002] Microbial Fuel Cell MFC (Microbial Fuel Cell) is a device that uses microorganisms to directly convert chemical energy in organic matter into electrical energy. This technology subverts the embarrassing situation that traditional sewage treatment technology only treats sewage as waste and consumes a lot of energy. . Urban domestic sewage and industrial organic wastewater contain a large amount of biomass energy, which is gradually regarded as a resource. In addition to stimulating energy from wastewater, MFC has the important advantages of using lower energy consumption and generating less sludge, and can also remove pollutants in wastewater. [0003] Generally speaking, the main pollutants in sewage include ...

AI Technical Summary

Problems solved by technology

Traditional biological denitrification includes two stages of nitrification and denitrification. There are long process flow, the need for mixed liquid reflux, high energy consumption, large amount of sludge generated, large land occupation, and high infrastructure investment. If the carbon source is insufficient in the denitrification stage, it is necessary to add additional carbon source organic matter and other shortcomings; these problems limit the development of water treatment technology

[0004] The microbial fuel cells in the prior art also have limited effect on denitrification of sewage, resulting in poor effluent quality, pH acidification or alkalinization of the cathode and anode, etc.

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