Kinetics of psychrophilic anaerobic sequencing batch reactor treating flushed dairy manure

► A new biomass retention strategy for solids containing influent was presented. ► Influent solids were used as natural biofilm support media for high rate digestion. ► The technology showed a good performance despite short HRT and low temperature. ► There is free of clogging hazard in biofilm support media caused by manure fiber. ► Four microbial growth kinetic models were compared for biofilm kinetics study.