序批式反应器
缺氧水域
反硝化
化学
废水
硝化作用
磷
制浆造纸工业
亚硝酸盐
硝基螺
化学需氧量
环境化学
发酵
硝酸盐
氮气
环境工程
食品科学
环境科学
有机化学
工程类
作者
Jinjin Liu,Yue Yuan,Baikun Li,Qiong Zhang,Wu Lei,Xiyao Li,Yongzhen Peng
标识
DOI:10.1016/j.biortech.2017.08.055
摘要
An anaerobic-aerobic-anoxic sequencing batch reactor (AOA-SBR) using sludge fermentation products as carbon source was developed to enhance nitrogen and phosphorus removal in municipal wastewater with low C/N ratio (<4) and reduce sludge production. The AOA-SBR achieved simultaneous partial nitrification and denitrification (SND), aerobic phosphorus uptake and anoxic denitrification through the real-time control and the addition of sludge fermentation products. The average removal efficiencies of total nitrogen (TN), phosphorus (PO43--P) and chemical oxygen demand (COD) after 145-day operation were 88.8%, 99.3% and 81.2%, respectively. Nitrite accumulation ratio (NAR) reached 99.1% and sludge reduction rate reached 44.1-52.1%. Specifically, 34.4% of the TN removal was carried out by SND and 57.5% by denitrification. Illumina MiSeq sequencing indicated that ammonium-oxidizing bacteria (Nitrosomonas) were enriched and nitrite-oxidizing bacteria (Nitrospira) did not exist in AOA-SBR. The system demonstrated potential to solve the dual problem of insufficient carbon source and sludge reduction.
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