多介质膜生物反应器-复合人工湿地组合工艺处理农村生活污水中试试验

Pilot Test of Medium Membrane Bioreactor-Composite Constructed Wetland Combination Process for Treatment of Rural Domestic Sewage

根据派河支流光明大堰河流域范围内产生的农村生活污水NH 3-N、COD含量超标的特点,以湿地技术为核心,设计了BA-MBR+复合人工湿地组合处理技术模型。模型经过调试运行,随着挂膜逐渐成熟后,对系统进出水质进行监测与分析。结果显示该系统对SS、COD Cr、TN、NH 3-N、TP平均去除率分别达90%、55%、42%、75%、30%。该工艺采用多级曝气,增加溶解氧含量,对氨氮去除效果明显,提高脱氮效率。整套系统内部形成“好氧-厌氧”的环境,有效削减污染物含量,脱氮除磷效果较好。该工艺适用于处理农村生活污水,且工艺采用湿地净化技术,运行成本低,村镇融合效果好,环境、生态效益好,易于在农村地区推广。

According to the characteristics of excess NH 3-N and COD content of rural domestic sewage generated within the Guangming Dayan River basin,a tributary of Paihe River,the ba-mbr+composite constructed wetland combined treatment technology model was designed with wetland technology as the core.After debugging and running,the water quality in and out of the system was monitored and analyzed as the hanging film gradually matures.The results showed that the average removal rates of SS,COD Cr,TN,NH 3-N and TP in the system reached 90%,55%,42%,75%and 30%respectively.This process adopted multi-stage aeration to increase the content of dissolved oxygen,obviously removed ammonia nitrogen and improved the efficiency of nitrogen removal.An"aerobic-anaerobic"environment was formed in the whole system,which could effectively reduce the content of pollutants and achieve better denitrification and phosphorus removal.This process was suitable for the treatment of rural domestic sewage,and the process adopted wetland purification technology,with low operating cost,good integration effect of villages and towns,good environmental and ecological benefits,and easy to be popularized in rural areas.