不同电子受体的反硝化除磷效果对比研究

反硝化除磷作用可以明显节省脱氮除磷过程的碳源需求和能耗。为研究不同电子受体下的反硝化除磷效果,利用一体化活性污泥工艺中污泥经过厌氧释磷后在不同电子受体下进行反硝化除磷试验,结果表明NO3-—N和NO2-—N均能参与反硝化除磷过程,在NO2-—N初始浓度高达30mg/L的条件下,除磷率仍在93%以上,未对反硝化除磷过程产生毒害作用。在工程应用中应加强短程硝化反硝化与反硝化除磷作用的耦合,在提高脱氮除磷效率的同时,取得明显的节能效果。

Research of denitrifying phosphorus removal under different electron acceptors

Denitrifying phosphorus removal can decrease carbon demand and energy consumption significantly.In this research,denitrifying phosphorus removal experiments were performed with sludge from an integrated activated sludge system to study denitrifying phosphorus removal efficiency under different electron acceptors.The results indicated that both nitrate and nitrite were involved in denitrifying phosphorus removal.Phosphorus removal rate was over 93% with initial nitrite concentration up to 30 mg/L,which had no negative effect to denitrifying phosphorus removal.This article indicated that the combination of short-cut nitrification and denitrification and denitrifying phosphorus removal should be regarded in engineering application,in order to improve energy saving effectiveness as well as advance phosphorus and nitrogen removal efficiency.