PRJDB2939 Bacterial community of S cycle UASB sludge Microbial community composition is an important factor in determining the successful performance of treatment systems. The present study examined microbial community composition of microbes involved in anaerobic sulfur oxidation in an upflow anaerobic sludge blanket reactor by 16S rRNA gene sequencing using Miseq sequencer. Bacterial community of S cycle UASB sludge bioproject PRJDB2939 PRJDB2939 true Microbial community composition is an important factor in determining the successful performance of treatment systems. The present study examined microbial community composition of microbes involved in anaerobic sulfur oxidation in an upflow anaerobic sludge blanket reactor by 16S rRNA gene sequencing using Miseq sequencer.