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硝酸盐对反硝化除磷过程的影响分析

Keywords: 反硝化除磷,缺氧吸磷,反硝化除磷菌,硝酸盐,亚硝酸盐

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Abstract:

在厌氧/缺氧间歇反应器内考察了硝酸盐进水浓度及进水方式对反硝化除磷过程的影响。结果表明:在缺氧阶段,反硝化除磷菌(DPBs)可将硝酸盐转化为亚硝酸盐,当硝酸盐浓度较低时,DPBs以亚硝酸盐为电子受体吸磷。进水COD浓度为220mg/L,正磷浓度为6.8mg/L,硝酸盐初始浓度为26mg/L时,系统达到最佳脱氮除磷效果,期间亚硝酸盐浓度积累至10.71mg/L。采用连续流投加硝酸盐的方式更利于氮磷的高效去除。

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