摘要
针对目前地下渗滤系统存在的水力负荷偏低和氮去除率不高的问题,构建了两套尼米槽式地下渗滤系统,并通过添加膨润土来改良床体基质组配。处理校园生活污水的结果表明,在25 cm/d的高水力负荷下,添加膨润土的地下渗滤系统对COD、总磷的去除率分别可以达到85%和90%以上;对氨氮和总氮也有较好的去除效果,相比未添加膨润土的地下渗滤系统,对氨氮和总氮的平均去除率分别提升了12.41%和8.97%;添加膨润土系统的出水水质满足《城镇污水处理厂污染物排放标准》(GB 18918—2002)的一级A标准。该研究结果可为提高地下渗滤工程的脱氮效率提供理论依据。
To solve the problems of low hydraulic loading and low removal rate of nitrogen in sub- surface wastewater infiltration system （SWIS） , two sets of SWIS using NiiMi process were built, and bentonite was added to improve the matrix of the bed. The results of campus sewage treatment showed that under the high hydraulic loading of 25 era/d, the removal rates of COD and TP in the SWIS with bentonite were above 85% and 90% , respectively. The average removal rates of NH4^＋ - N and TN in the SWIS with bentonite were 12.41% and 8.97% higher than those in the SWIS without bentonite, respectively. The effluent from the SWIS with bentonite could meet the first level A criteria specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918 -2002）. The research can provide theoretical foundation for improving the removal rate of nitrogen in SWIS projects.
出处
《中国给水排水》
CAS
CSCD
北大核心
2015年第15期20-23,共4页
China Water & Wastewater
基金
辽宁省自然科学基金资助项目(2013020146)
辽宁省高校杰出青年学者成长计划项目(LJQ2012102)
国家水体污染控制与治理科技重大专项(2013ZX07202-007)
关键词
地下渗滤
尼米槽式
高负荷
生活污水
膨润土
subsurface wastewater infiltration system （SWIS）
NiiMi process
high hydraulic loading
domestic sewage
bentonite
