Research Progress of the Cultivation and Influencing Factors of Anaerobic Granular Sludge in Anaerobic Reactor

Anaerobic biological treatment technology has been widely used in various wastewater treatments because of its advantages of high organic load, low sludge output and low energy consumption. Anaerobic granular sludge has the advantages of good settling performance, high microbial concentration and high organic load, which can greatly improve the efficiency of wastewater treatment. In particular, in the treatment of wastewater containing high ammonia nitrogen, the formation of anaerobic granular sludge is also essential for the efficient biological nitrogen removal in the reactor. But up to now, we still lack a systematic understanding of the formation of granular sludge in anaerobic reactors and the effect of wastewater treatment. So, this paper summarized the formation mechanism of anaerobic granular sludge in anaerobic reactors, analyzed the influencing factors, discussed the simulation of anaerobic granular sludge growth in anaerobic reactors, and finally analyzed the mainstream application of anaerobic granular sludge at home and abroad. The formation of granular sludge in anaerobic reactors is the result of multiple factors, and every factor that affects the formation of anaerobic granular sludge should be treated seriously. The theoretical guidance and technical support for the cultivation and application of granular sludge in anaerobic reactors were provided in this paper.