不同丙酸/乙酸长期驯化的活性污泥对EBPR的影响

通过长期驯化的SBR增强生物除磷系统,研究了不同丙酸/乙酸对磷和PHA转化的影响,以及微生物代谢PHA及其组分的计量学.结果表明,随着丙酸/乙酸的升高.系统的除磷能力增强;污水中合适的丙酸/乙酸(C-mol比)为2:1.计量学研究表明,聚磷菌消耗I C-mol乙酸生成0.65 C-mol PHB和0.33 C-mol(PHV PH2MV),消耗I C-mol丙酸生成极小量PHB和1.21C-mol(PHV PH2MV).磷去除率与(PHV PH2MV)代谢有良好的相关性.

Effect of Different Ratios of Propionic to Acetic Acids on Long-term Cultured Active Sludge for Enhanced Biological Phosphorus Removal

Abstract: With the long-term cultured enhanced biological phosphorus removal systems in sequencing batch reactors, the effect of different ratios of propionic acid to acetic acid on the transformations of phosphorus and polyhydoxyalkanoates (PHA), and the metabolism stoichiometry of PHA by phosphorus accumulating organisms were studied in this paper. Results showed that the phosphorus removal efficiency improved with the increase of propionic acid to acetic acid ratio, and the suitable C-mol ratio of propionic acid to acetic acid was 2:1. Stoichiometry study indicated that 0.15 C-mol PHB and 0.33 C-mol (PHV+PH2MV) were synthesized per degraded C-mol acetic acid, and very few PHB and 1.21 C-mol (PHV+PH2MV) were synthesized per degraded C-mol propionic acid. It was also observed that the phosphorus removal efficiency exhibited a good linear relationship with (PHV+PH2MV).