The nitritation performance of biofilm reactor for treating domestic wastewater under high dissolved oxygen
作者： Zhaoming Zheng , Zebing Li , Jing Ma , Jia Du , Guanghui Chen
DOI: 10.1016/J.JES.2015.09.006
关键词:
摘要: The objective of this study was to investigate the nitritation performance in a biofilm reactor for treating domestic wastewater. operated continuous feed mode from phases 1 3. dissolved oxygen (DO) controlled at 3.5-7 mg/L throughout experiment. showed excellent after inoculation nitrifying sludge, with hydraulic retention time being reduced 24 7 hr. Above 90% nitrite accumulation ratio (NAR) maintained phase 1. Afterwards, nitratation occurred low NH4(+)-N concentration reactor. improvement 20-35 had limited effect on recovery nitritation. However, recovered rapidly when sequencing batch adopted 4, effluent above mg/L. ammonia oxidizing bacteria (AOB) activity and combined inhibition free (FA) nitrous acid (FNA) (NOB) were two key factors rapid Sludge obtained tests. results tests good relationship long term operation
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