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This study investigated the microbial evolution in a mainstream partial nitritation/anammox (PN/A) reactor started by inoculation from sidestream PN/A. The reactor was fed with pre-treated sewage and operated for 120 days at room temperature (24–26 °C). It was found that for both sidestream and mainstream PN/A, anammox bacteria preferentially grew in granular sludge while ammonium-oxidizing bacteria...
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 200days. High nitrogen removal efficiency of 82% was achieved with nitrogen removal rates of 0.097±0.019kgN/(m3·d). Therefore, plug-flow IFAS reactor...
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