High-temperature neutral blowoff high-efficiency anaerobic fermentation apparatus and fermentation method

Abstract

The invention relates to a high-temperature neutral blowoff high-efficiency anaerobic fermentation apparatus and a fermentation method. The high-temperature neutral blowoff high-efficiency anaerobic fermentation apparatus comprises a raw material premixing tank, an anaerobic fermentation tank and a biogas slurry blowoff system which are successively connected with one another; the biogas slurry blowoff system comprises a blowoff tower, an ammonia gas absorption tower connected with a gas outlet of the blowoff tower, and a heating system for heating the blowoff tower; and a biogas outlet of theanaerobic fermentation tank is connected with a generator, and a waste heat collection apparatus disposed outside the generator is connected with the heating system. No alkaline agent is added in theblowoff process, the problems of mass foam and corrosion in the blowoff process can be effectively reduced, the expense for buying a chemical alkaline agent is reduced, the problem that alkaline tailwater after the blowoff is difficult to discharge can be avoided, the accumulation and inhibition problem of ammonium and nitrogen in the fermentation tank can be alleviated, and the high-temperatureneutral blowoff high-performance anaerobic fermentation apparatus and the fermentation method have important significance for ensuring the high-efficient and stable operation of a large-middle-sizedbiogas project.

Description

technical field [0001] The invention relates to the technical field of biological anaerobic fermentation and nutrient recovery, in particular to a high-temperature neutral blow-off high-efficiency anaerobic fermentation device and a fermentation method. Background technique [0002] Anaerobic fermentation biogas technology has attracted widespread attention and rapid development worldwide in recent years due to its dual functions of alleviating the environmental pollution of livestock and poultry manure and alleviating the pressure of increasing rural energy demand. However, livestock and poultry manure is an organic waste with high nitrogen content, and it is easy to form high ammonia nitrogen concentration during anaerobic fermentation. However, high ammonia nitrogen concentration can easily induce the increase of free ammonia concentration, thereby reducing the activity of methanogens and hindering the orderly progress of anaerobic fermentation. Therefore, it is necessar...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a fermentation device and fermentation method for efficient and stable anaerobic fermentation of livestock and poultry manure and efficient recovery of biogas nitrogen nutrients, which can effectively alleviate the foaming phenomenon produced in the traditional high-pH biogas liquid stripping process And for the corrosion and blockage of equipment, and the difficulty of discharging high pH biogas slurry, solve the problem of ammonia inhibition in the process of anaerobic fermentation of livestock and poultry manure, the problem of reasonable reflux of biogas slurry and the potential nitrogen pollution of excess biogas slurry, and realize biogas Recovery and reuse of nitrogen nutrients in liquid

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