Achieving advanced nitrogen removal in a novel partial denitrification/ anammox-nitrifying (PDA-N) biofilter process treating low C/N ratio municipal wastewater
Achieving advanced nitrogen removal in a novel partial denitrification/ anammox-nitrifying (PDA-N) biofilter process treating low C/N ratio municipal wastewater
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在处理低碳氮比城市废水的新型部分反硝化/厌氧氨氧化硝化 (PDA-N) 生物过滤器工艺中实现高级脱氮
DOI：
10.1016/j.biortech.2021.125661
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发表时间：
2021
影响因子：
11.4
通讯作者：
Ma Bin
中科院分区：
文献类型：
--
作者：
Lu Wenkang;Zhang Yanli;Wang Qingqing;Wei Yan;Bu Yinan;Ma Bin
为实现主流厌氧氨氧化，开发了一种新型的部分反硝化/厌氧氨氧化-硝化（PDA-N）生物滤池工艺处理城市污水。当进水COD/TN = 3.2时，该工艺对总无机氮（TIN）的去除率为81%，平均出水TIN为7.31 mg. L-1. PDA生物滤池中的厌氧氨氧化对TIN的去除率约为97%。亚硝酸盐由厌氧氨氧化的部分反硝化作用提供。PDA生物滤池中、下部区域的反硝化作用主要由Thurea驱动，而中、上部区域的厌氧氨氧化作用主要由Brocadia驱动。在处理真实的城市污水时，PDA-N生物滤池能有效去除TN，出水TN为5.96 mg·L-1。厌氧氨氧化发挥了主要作用，实现了约98%的TIN去除。与传统的硝化/反硝化工艺相比，该工艺可节省有机碳需求和耗氧量。
For achieving mainstream anammox, a novel partial denitrification/anammox-nitrifying (PDA-N) biofilter process to treat municipal wastewater was developed. This process achieved a total inorganic nitrogen (TIN) removal efficiency of 81%, with an average effluent TIN of 7.31 mg·L-1, when the ratio of influent chemical oxygen demand (COD) to TIN was 3.2. Approximately 97% of the TIN was removed by anammox in the PDA biofilter. Nitrite was provided by partial denitrification for anammox. Partial denitrification was driven byThaureain the middle and lower regions of the PDA biofilter, while anammox was mainly driven byCandidatusBrocadia in the middle and upper regions. When treating real municipal wastewater, the TIN was efficiently removed in the PDA-N biofilter, with the effluent TIN of 5.96 mg·L-1. Anammox played a primary role, achieving approximately 98% of the TIN removal. Compared to the traditional nitrification/denitrification process, this process can economize organic carbon demand and oxygen consumption.