Advancements in research on bacteria-algae symbiosis technology for treating biogas slurry in livestock and poultry breeding

The treatment and resource utilization of a large amount of anaerobically treated livestock and poultry manure has become a significant research focus in sewage treatment due to the rapid expansion of large-scale livestock and poultry farms in China. This article discussed the drawbacks and limitations of traditional biochemical treatment methods and microalgae technology in biogas slurry resource treatment, and explored the emergence and progression of bacteria-algae symbiosis technology in this area. The research status of bacteria-algae symbiosis technology were systematically examined, including the development and application of reactors, the selection of functional bacterial and algal species, the determination of bacteria-algae inoculation ratio, and the development of bacteria-algae granular sludge, all based on the mechanism and efficiency of biogas slurry treatment. Additionally, the research direction of bacteria-algae symbiosis technology in the field of biogas slurry treatment and resource utilization was analyzed, emphasizing the potential of bacteria-algae granular sludge resource utilization technology as a pivotal research area in biogas slurry resource treatment technology.