反硝化细菌
厌氧氨氧化菌
反硝化
强化生物除磷
缺氧水域
磷
废水
化学
环境化学
流出物
污水处理
序批式反应器
活性污泥
曝气
氮气
制浆造纸工业
环境工程
环境科学
有机化学
工程类
作者
Yunlong Su,Rui Du,Jiao Wang,Junfei Qiao,Xiyao Li,Xiaofei Xue,Zhi-Qi Cao,Yongzhen Peng
标识
DOI:10.1016/j.cej.2023.147227
摘要
Partial Denitrification coupled with Anammox (PDA) process was used as for nitrogen removal from wastewater. However, the phosphate removal still relies on chemical methods in wastewater treatment plants. Denitrifying Phosphorus Removal (DPR) process allows phosphorus uptake under anoxic conditions using nitrate (NO3−) as electron acceptor. In this study, the PDA and DPR processes were successfully coupled into a novel integration (DPR-PDA) for co-treatment of simulated domestic wastewater and NO3− wastewater to achieve simultaneous nitrogen and phosphorus removal. The effluent TN and TP were 0.9 and 0.2 mg/L during phase Ⅵ (day450-513) under influent COD/TN of 1.8, respectively. Anammox bacteria was self-enriched in this fully suspended sludge system, with abundances increasing from undetected at day19 to 2.0 × 1010 copies/g dry sludge at day468. Anammox bacteria was effectively retained and was responsible for the main nitrogen removal, accompanied by increasing activity up to 3.1 mg N/g VSS/h. Batch tests demonstrated that denitrifying polyphosphate accumulating organisms exhibited DPR capacity immediately after the introduction of NO3−, but not after the introduction of nitrite (NO2−) only. Candidatus_Competibacter with endogenous denitrification ability was enriched from 13.30 % to 35.42 %, which coexisted with anammox bacteria stably. The novel DPR-PDA process is a promising technology for simultaneous removal of nitrogen and phosphorus with low carbon demand and without aeration.
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