A self-sufficient bioaugmentation method for biogas fermentation performance

Abstract

The invention discloses a self-sufficient biogas fermentation performance bioenhancement method. In this method, during the operation of the biogas fermentation system, the bio-augmented bacterial agent is taken out from the auxiliary tank, and is added to the biogas fermentation tank according to a certain dose and period to improve the biogas fermentation performance. The output fermentation liquid is an inoculum, which is obtained by culture medium containing carbon source and inorganic salt. The invention utilizes the self-sufficient bio-augmented bacteria agent to improve the biogas fermentation performance, specifically to increase the organic load, fermentation concentration and gas production rate of anaerobic fermentation, etc., and to relieve acid inhibition and ammonia inhibition, promote the start-up of biogas fermentation tanks, and promote rancidity fermentation The system resumes gas production, and there is no need to purchase bacterial agents, which can avoid the storage and transportation of bacterial agents, and save the cost of bioaugmentation.

Description

technical field [0001] The invention relates to the technical field of biogas preparation by anaerobic fermentation, in particular to a self-sufficient biogas fermentation performance bioenhancement method. Background technique [0002] Using anaerobic fermentation technology to treat waste can reduce environmental pollution and alleviate energy shortage. In recent years, my country's biogas industry has developed rapidly, but some biogas projects have poor operation and management, resulting in poor fermentation performance and even being idle. In order to avoid organic load overload, most biogas projects operate continuously at a relatively low fermentation concentration to improve the stability of continuous operation. However, low-load operation leads to low volumetric gas production rate of biogas projects and poor economic benefits. However, the high organic load anaerobic fermentation system is prone to accumulation of volatile fatty acids, resulting in a decrease i...

AI Technical Summary

Problems solved by technology

However, currently there are very few methanogenic bacterial agents that are effective and have relatively mature production processes, and pure methanogenic bacteria need to be strictly anaerobic, and the cultivation technology requires high requirements; in addition, the preparation and storage technology of liquid or solid bacterial agents has not yet broken through