摘要： 研究了电子受体和碳源对活性污泥反硝化除磷的影响。亚硝酸盐和硝酸盐都可以作为电子受体在缺氧的条件下实现对磷的吸收，但其吸磷效率比氧低。较高的亚硝酸盐浓度会严重抑制污泥的活性，当一次加入NO₂^-质量浓度为46 mg/L时，反硝化吸收磷不能发生；而分4次加入（每次11.5 mg/L），吸磷量可达到19.5 mg/L。电子受体浓度为0.24 mmol/L时，吸收的P和加入的N的物质的量比：NO₂^-为1.7，NO₃^-为4.7。在低的碳源浓度下，碳源可以促进反硝化磷吸收；碳源浓度过高，系统形成厌氧环境，磷反而被释放。

关键词: 活性污泥, 反硝化除磷, 电子受体, NO₂^-, NO₃^-, 碳源, 磷

Abstract: The effects of electron acceptors and carbon sources on denitrifying phosphorus removal of oxidation ditch sludge system have been researched. Both nitrate and nitrite could be used as electron acceptors for adsorbing phosphorus under anoxic condition, but its adsorption capacity for phosphorus is lower than that for oxygen. Nitrite with higher concentration can seriously inhibit the activity of sludge. When the NO₂^- with mass concentration of 46 mg/L is added at one time, denitrifying phosphorus removal would not occur. But if it is added in four batches(11.5 mg/L for each time), the amount of absorbed phosphorus is 19.5 mg/L. When the electron acceptor concentration is 0.24 mmol/L, the mole ratio of absorbed phosphorus and added N are NO₂^-:1.7, NO₃^-:4.7. When the carbon source concentration is low, carbon source can promote denitrifying phosphorus removal. When the carbon source concentration is too high, forming anaerobic environment in the system, the phosphorus will be released instead.

Key words: activated sludge, denitrifying phosphorus removal, electron acceptors, NO₂^-, NO₃^-, carbon resources, phosphorus

中图分类号: 

• X703