反硝化细菌
缺氧水域
反硝化
硝化作用
环境化学
亚硝酸盐
废水
污水处理
厌氧氨氧化菌
化学
磷
序批式反应器
强化生物除磷
环境工程
制浆造纸工业
硝酸盐
氮气
活性污泥
环境科学
有机化学
工程类
作者
Chuanfeng Zhang,Liang Zhang,Jinjin Liu,Xiyao Li,Qiong Zhang,Yongzhen Peng
出处
期刊:Water Research
[Elsevier]
日期:2024-02-01
卷期号:250: 121046-121046
被引量:2
标识
DOI:10.1016/j.watres.2023.121046
摘要
Achieving economic and efficient removal of nutrients in mainstream wastewater treatment plants (WWTPs) continues to be a challenging research topic. In this study, a continuous-flow anaerobic/aerobic/anoxic system with sludge double recirculation (AOA-SDR), which integrated partial nitrification (PN), endogenous denitrification (ED) and nitrite-type denitrifying phosphorus removal (nDNPR), was constructed to treat real carbon-limited municipal wastewater. The average effluent concentrations of total inorganic nitrogen (TIN) and PO43−-P during the stable operation period were 1.8 and 0.3 mg/L, respectively. PN was achieved with an average nitrite accumulation ratio of 90.4% by combined strategies. Adequate storage of polyhydroxyalkanoates and glycogen in the anaerobic zone promoted the subsequent nitrogen removal capacity. In the anoxic zone, nitrite served as the main electron acceptor for the denitrifying phosphorus removal process. Mass balance analysis revealed that nDNPR contributed to 23.6% of TIN removal and 44.7% of PO43−-P removal. The enrichment of Nitrosomonas (0.45%) and Ellin 6067 (1.31%), along with the washout of Nitrospira (0.15%) provided the bacterial basis for the successful implementation of PN. Other dominant endogenous heterotrophic bacteria, such as Dechlormonas (10.81%) and Candidatus Accumulibacter (2.96%), ensured simultaneous nitrogen and phosphorus removal performance. The successful validation of integrating PN, ED and nDNPR for advanced nutrient removal in the AOA-SDR process provides a transformative technology for WWTPs.
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