Take eight samples of activated sludge and biofilm from different operating stages of the system, namely R1 sludge, R2 (Day 50, A2SBR anaerobic biofilm, end of first stage), and R3 (Day 50, O-SBR aero
A total of 228762 OTUs of microorganism were obtained with an average of 8798 OTUs per sludge sample. The data were used to make relative abundance, PLS, RDA and KEGG analysis.