一体化AOA滤池处理农村污水的回流比研究

Study on Reflux Ratio of Rural Sewage Treatment by Integrated AOA Filter

对1种适用于农村污水的新型一体化处理设备——漂浮滤料一体化AOA生物滤池,实验探讨了处理高NH4+-N含量农村污水的优化回流比。结果表明,在气水体积比为2:1、水力负荷为4.2 m3/(m2·h)的工况下,回流比体积为150%时,出水仅COD可稳定满足GB 18918-2002的一级B排放标准;回流比体积为200%时,对COD、NH4+-N和TN均具有较高的去除率,出水可稳定达到相关要求;回流体积比为250%时,出水NH4+-N含量不稳定,有超标现象。因此,应选择200%为漂浮滤料一体化AOA生物滤池处理高氨氮农村污水的优化回流体积比。

For a new integrated equipment suitable for rural sewage treatment, the floating filter integrated AOA biofilter, the optimal reflux ratio of high ammonia nitrogen content rural sewage treatment was discussed. The results showed that under the condition of gas-water volume ratio was 2：1 and hydraulic load was 4.2 m3/（m^2·h）, when the reflux specific volume was 150%, only the COD of the effluent could stably meet the first level B emission standard ofGB 18918--2002; when the reflux ratio was 200%, the COD, NH4^＋-N and TN had higher removal rate, and the effluent could stably meet the relevant requirements; when the reflux volume ratio was 250%, the effluent NH4^＋-N content was unstable and exceeded the standard. Therefore, the optimal reflux volume ratio was 200% for high ammonia nitrogen rural sewage treatment by floating filter integrated AOA biofilter.