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SBR单级自养脱氮系统氮素转化途径

Keywords: 氮素转化途径,短程硝化,厌氧氨氧化,自养反硝化,SBR

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Abstract:

利用氮素计量关系和批式实验研究了SBR系统中基于短程硝化的单级自养脱氮特性和脱氮途径。结果表明,SBR系统获得良好脱氮效果,TN最高去除负荷和去除速率分别达0.49kgN/(m3·d)和0.20kgN/(kgVSS·d);系统中82%的氨氮转化成气体脱除,10%的氨氮转化成硝酸盐氮。批式实验结果表明,SBR系统中的污泥同时具有厌氧氨氧化、亚硝酸盐氧化和自养反硝化活性,三者的反应速率分别为0.12kgNH4+-N/(kgVSS·d)、0.04kgNO2--N/(kgVSS·d)和0.03kgNO2--N/(kgVSS·d)。综上,SBR系统中氮的脱除是短程硝化、厌氧氨氧化和反硝化共同作用的结果,产生的硝酸盐是厌氧氨氧化和硝化作用所致。

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