接触氧化-人工湿地组合工艺处理桂林市郊村落污水

Treatment of village sewage with contact oxidation-constructed wetland technique in Guilin suburb

通过对桂林市郊村落生活污水水质情况的调研和监测,选择狮子岩村生活污水作为处理对象,建立了中试基地.采用接触氧化-人工湿地组合工艺处理村落污水,并选用桂林市常用景观植物小叶女真(Ligustrum quihoniCarr)、鸭脚木(Schefflera octophylla)、黄金榕(Ficus m icrocar-pacv.Golden Leaves)和美人蕉(Canna indicaL.)作为湿地研究对象,一年多的运行结果表明,美人蕉湿地的净化效果最好,在人工湿地的HRT为4 d时,系统对CODC r、SS、NH3-N、TN和TP的平均去除率分别为90.2%、95.8%、71.1%、73.7%和69.5%,且出水水质稳定,达到《再生水回用于景观水体的水质标准》(CJ/T 95-2000).该污水处理系统无需进行污泥处理,易于维护.

Based on the investigation of village sewage quality and quantity around Guilin, a pilot study site at Shiziyan village , is chosen and build the contact oxidation -constructed wetland system to treat from the plant species Ligustrum quihoni Carr, Sc village sewage , Ficus microcarpa cv. Golden Leaves and Canna indica L. The research shows that the Indica Canna wetland has the best purification efficiency after 1 year operation, with the mean value of 90. 2% for CODCr, 95.8% for SS, 71.1% for NH3-N, 73.7% for TN, and 69. 5% for rip. The quality of the treated sewage can meet the ＂Quality standard for reclaimed wastewater reused as scenic water＂ （ CJ/T 95 - 2000）. The system works steady and effectively, and no more sludge treatment.