Influence of Organic Loading on Characteristics of Aerobic Granular Sludge

Influence of different organic loadings on characteristics of aerobic granular sludge in sequencing batch airlift reaction(SBAR) was studied.Formation of aerobic granular sludge and effect of treating municipal wastewater were observed.Results showed that there exists aerobic granular sludge on different organic loadings of 3kgCOD/(m3·d) and 6kgCOD/(m3·d) in SBAR,with SVI of 25mL/g and 32mL/g respectively and settling velocity up to 33.85m/h and 33m/h.At higher organic loading,sludge diameter was in 0.6～1.5mm,and removal efficiency of COD,NH3-N and TP was 97.57%,87.74% and 86.60% respectively.With lower organic loading,sludge diameter was in 0.4～1.0mm,and removal efficiency of COD,NH3-N and TP was 96.93%,85.48% and 84.20% respectively.