Improved biological phosphorus removal induced by an oxic/extended-idle process using glycerol and acetate at equal fractions

摘要: The Oxic/Extended-Idle (O/EI) regime is a promising technology for biological phosphorus removal (BPR) from wastewater, but the BPR efficiency might be affected by an insufficient amount of carbon source in raw wastewater. In this study, novel strategy i.e., using acetate and glycerol at equal fractions as source, to simultaneously significantly improve reduce biomass waste was reported. Experimental results showed that could enhanced when not dominant substrate, best 96.6 ± 1.2% were fractions. However, deterioration observed worst 58.1 1.8% served sole source. Fluorescence situ hybridization analysis demonstrated more polyphosphate accumulating organisms less glycogen cultured activated sludge Further mechanism investigations revealed transformations polyhydroxyalkanoates glycogen, activities key enzymes responsible P (such exopolyphosphatase kinase) all ratio glycerol. addition, performances between O/EI reactors classical anaerobic/oxic (A/O) employing solely compared, Gly-fed reactor drive better than A/O reactor. These suggested moderate levels improved BPR, economical sustainable alternative avoid deficiency