RESEARCH ON THE CHARACTERISTICS OF SLUDGE PROCESS ACTIVATED BY SIDESTREAM SEQUENCING BATCH REACTOR

With the biological phosphorus removal process of activated sludge by side flow sequencing batch as the research object, the hydrolysis and acidification effects of sludge in the anaerobic fermentation tank and the pollutant removal effects under different operating conditions were preliminarily analyzed.Subsequently, the relationship between activated sludge characteristics and the pollutant removal mechanism was explored from the perspective of extracellular polymeric substances and microorganisms.The composition and quantity of extracellular polymers excreted by activated sludge were analyzed, together with the population density of phosphorus-accumulating microorganisms.Results showed that extracellular polymers consist of three components: tryptophan-like substances, humus-like substances, and protein-like substances.Proteobacteria were identified as the predominant group of phosphorus-accumulating bacteria, accounting for up to 52.6%.Gammaproteobacteria, Betaproteobacteria, and Rhodocyclaceae were also identified as Important phosphorus-accumulating microorganisms, accounting for up to 22% to 50%.