以亚硝酸盐为电子受体的反硝化除磷影响因素的研究现状

INFLUENCE FACTORS OF DENITRIFYING PHOSPHOROUS REMOVAL USING NITRITE AS AN ELECTRON ACCEPTOR

以亚硝酸盐作为电子受体的反硝化除磷拥有能耗低、需氧量少等优点,但其反应受多重因素影响。综述了将NO2--N作为电子受体的反硝化除磷机理,同时概述了底物种类、NO2--N质量浓度、泥龄、污泥驯化方式等分别对亚硝化反硝化除磷的影响,当有机底物为乙酸盐,NO2--N质量浓度低于30 mg/L,泥龄15 d,温度在20~30℃时,能获得较好的亚硝化反硝化除磷效果,并在此基础上对该领域的研究提出了展望。

Denitrifying phosphorus removal applying nitrite as an electron acceptor had advantages of low energy consumption and little oxygen demand,but the reaction was affected by various factors. The mechanism of nitrosation denitrifying phosphorus removal using NO2-N as an electron acceptor was reviewed here and factors including organic substrates, NO2-N concentration, sludge retention time （SRT） and sludge domestication method which affected the denitrification phosphorous removal were also summarized. Efficient nitrosation denitrification phosphorous removal could be reached when acetate was selected as organic substrate, NO2-N concentration was less than 30 mg/L, SRT maintained 15 d and the temperature was between 20~30 ℃. Some useful perspective in this field based on this research was put forward.