【摘要】 通过对实验室培养的富集反硝化聚磷菌活性污泥在不同电子受体条件、不同MLSS条件下进行缺氧批式试验,研究了NO-2-N作为电子受体时对反硝化脱氮除磷的影响,并与NO-3-N作为电子受体时进行比较。同时分析了MLSS对反硝化脱氮除磷的影响。结果表明:NO-2-N可作为电子受体被DPAOs利用,但是过量的NO-2-N会对吸磷产生抑制作用;NO-2-N作为电子受体可能同时参与了反硝化除磷和常规的内源反硝化。此外,增加活性污泥浓度(MLSS)可提高缺氧吸磷速率,但过高的污泥浓度会导致单位污泥的吸磷速率降低,因此需合理控制反硝化除磷中的MLSS。更多还原

【Abstract】 The paper studied the effect of NO-2-N on denitrifying phosphorus removal by DPAOs in batch tests in different conditions of electron and MLSS and compared the result with that of NO-3-N as electron acceptor.The results showed that NO-2-N can be taken as electron acceptor used by DAOs for denitrifying phosphorus removal,phosphorus uptake inhibition is induced by excessive NO-2-N.Moreover,NO-2-N as electron acceptor might be involved in denitrifying phosphorus removal and endogenous denitrification at the same time.The result shows that the increase of MLSS can improve anoxic phosphorus removal,while excessive mixed liquid suspended solids(MLSS) will reduce phosphorus uptake rate of unit sludge.So it is necessary to reasonably control MLSS concentration in denitrifying phosphorus removal.更多还原