砂土混合人工土快滤系统处理污水脱氮性能研究  

Nitrogen Removal Performance of Constructed Rapid Infiltration Mixed with Sandy Soil in Treating Municipal Wastewater

作　　者：刘惠军[1] 刘新程[1] 曲威[1] 王绍武[1] 

机构地区：[1]中国农业大学烟台研究院,山东烟台264670

出　　处：《山东农业科学》2016年第8期98-101,共4页Shandong Agricultural Sciences

基　　金：烟台市科学技术发展计划项目(2005226)

摘　　要：采用海砂、校园土混合作为快滤介质构建人工土快滤系统用以处理生活污水,考察快滤系统对污染物特别是氮素的去除效果,并进一步优化设计快滤池结构,提高系统对总氮的去除效率。结果表明,系统具有良好的有机物、氨氮处理效果,去除率分别达到78%、92%,但总氮去除效率不理想,仅有33.4%;有机物和氨氮的去除主要发生在系统上部40 cm土层中,总氮的去除和反硝化作用主要发生在系统下部60 cm土层中;土层下部设置长度为30 cm的饱水带人为增加了缺氧段长度,促进反硝化菌生长,使系统TN去除效率提高到64.8%。A constructed rapid infiltration（ CRI） was developed to treat municipal wastewater with the mixture of sea sand and campus soil.The tests were conducted to investigate its pollutants＇ removal effects,especially nitrogen.The reactor structure was also optimized to enhance the total nitrogen removal.The results showed that CRI exhibited better removal effects on organic compound and ammonia nitrogen with the removal efficiency as 78% and 92% respectively; but the total nitrogen removal efficiency was only 33.4%; the COD and NH＋4-N removal were mainly focused on the upper 40-cm layer,whereas the total nitrogen removal and denitrification occured on the lower 60-cm layer of infiltration medium.Furthermore,the saturated zone with30 cm in length was set up to artificially increase the anoxic zone and enhance the activity of denitrifying bacteria,which could made the removal efficiency of total nitrogen reach 64.8%.

关 键 词：人工土快滤 砂土混合物 饱水带 总氮 去除率 

分 类 号：X799.3[环境科学与工程—环境工程]