Improved Biological Phosphorus Removal under Low Solid Retention Time Regime in Full-Scale Sequencing Batch Reactor

Enhanced biological phosphorus removal (EBPR) is an obscure but economical and helpful technology for removing biologically from wastewater. A 3-MLD capacity pre-anoxic selector-attached sequencing batch reactor (SBR) treated municipal wastewater the residents of IIT Roorkee. The treatment in plant satisfied effluent discharge standards all respects except phosphorus, observed during intensive two-year study. An elaborated 80-day study was performed to enhance improve plant’s performance terms specifically, with run 1: solid retention times (SRT) reduced 56 20 days (t = 35 d), 2: lowering diffuser’s running time 15 min 10 anoxic cum anaerobic selector chambers (dissolved oxygen (DO) concentration <0.15 mg/L) along reducing SRT 25 3:intensive reduction ≤10 d). During 3, increment enhanced efficiency three that initial (ηmax~65%) a readily biodegradable chemical demand total ratio (rbCOD/TP) 7.8. 16SrRNA revealed microbial community structure before after changes EBPR efficiencies, correlate biochemical processes functional organisms.