Achieve efficient nitrogen removal from real sewage in a plug-flow integrated fixed-film activated sludge (IFAS) reactor via partial nitritation/anammox pathway.
Achieve efficient nitrogen removal from real sewage in a plug-flow integrated fixed-film activated sludge (IFAS) reactor via partial nitritation/anammox pathway.
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DOI：
10.1016/j.biortech.2017.05.041
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发表时间：
2017-09
影响因子：
11.4
通讯作者：
Yandong Yang;Liang Zhang;Jun Cheng;Shu-jun Zhang;Baikun Li;Yongzhen Peng
中科院分区：
文献类型：
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作者：
Yandong Yang;Liang Zhang;Jun Cheng;Shu-jun Zhang;Baikun Li;Yongzhen Peng
试验研究了推流式一体化固定膜活性污泥（IFAS）反应器应用于污水部分亚硝化/厌氧氨氧化（PN/A）工艺的可行性。IFAS反应器进料有真实的预处理的污水（C/N比= 1.3）并运行200天。脱氮率为0.097 ± 0.019 kgN/（m3·d），脱氮效率为82%。因此，推流式IFAS反应器可作为污水PN/A工艺的替代工艺。此外，还发现残留铵对污水PN/A工艺的稳定性有显着影响。当氨氮浓度低于1 mg/L时，出水硝酸盐积累，PN/A性能变差。当氨氮浓度大于3 mg/L时，PN/A系统可实现长期稳定运行。
This study tested the feasibility of plug-flow integrated fixed-film activated sludge (IFAS) reactor in applying sewage partial nitritation/anammox (PN/A) process. The IFAS reactor was fed with real pre-treated sewage (C/N ratio = 1.3) and operated for 200 days. High nitrogen removal efficiency of 82% was achieved with nitrogen removal rates of 0.097 ± 0.019 kg N/(m3·d). Therefore, plug-flow IFAS reactor could be an alternative to applying sewage PN/A process. Besides, it was found that the stability of sewage PN/A process was significantly affected by residual ammonium. Nitrate accumulated in effluent and PN/A performance deteriorated when residual ammonium was below 1 mg/L. On the contrary, long-term stable PN/A operation was achieved when residual ammonium was over 3 mg/L.