Study on the Treatment of Plateau Domestic Sewage by MABR Coupled AO Process
A reactor combining a membrane-aerated biofilm reactor(MABR)with an anoxic-oxic(AO)process was established to explore the treatment effects on domestic sewage in plateau areas.The study investigated the removal efficiencies of chemical oxygen demand(COD),ammonia nitrogen,and total nitrogen under different operating conditions using the coupled process.The results showed that with a hydraulic retention time of 24 hours and a nitrification liquid reflux ratio of 200%,the average removal rates of COD,total nitrogen,and ammonia nitrogen under continuous operation were 88.17%,71.35%,and 89.45%,respectively.Microbial community analysis indicated that changing the hydraulic retention time and nitrification reflux ratio increased the abundance and diversity of microbial communities.The biofilm contained a variety of nitrifying and denitrifying bacterial communities that worked together to achieve efficient nitrogen removal.
万方数据
维普
