A/O/O-MBR工艺处理高速公路服务区污水启动特性研究
Study on start-up characteristics of A/O/O-MBR process for treating sewage in expressway service areas
This study investigates the start-up characteristics of A/O/O-MBR process in treating with simulated expressway service area sewage with high ammonia nitrogen and low C/N ratio under the condition without mixed liquid backflow.Experimental results show that the removal rates of -N,COD and TN reach steadily 81.54%,86.54% and 49.34%,respectively after 18 days when the inlet flow rate gradually increases from 1 L·h-1 to 6 L·h-1 under the conditions that the influent COD is 126-145 mg·L-1,the influent -N is 125-142 mg·L-1,as well as anoxic and aerobic tanks are filled with 50% polyurethane filler.These results demonstrate that the A/O/O-MBR system rapidly starts up.It is indicated by the results from high-throughput sequencing test that every reaction tank contains rich functional bacteria,such as nitrifying bacteria,denitrifying bacteria and anaerobic ammonia oxidation bacteria.The A/O/O-MBR process can achieve desirable TN removal rate without mixed liquid backflow,which provides guidance for sewage treatment in expressway service areas.
高速服务区污水 / 低C/N / 启动特性 / A/O/O-MBR工艺
sewage in expressway service area / low C/N / star-tup characteristics / A/O/O-MBR process
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山西省应用基础研究计划项目(201901D111067)
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