污水处理系统耦合水蚯蚓后的重金属迁移转化研究  

Migration and Transformation of Heavy Metals in Sewage Treatment System Coupled with Tubifex

作　　者：黄伟飞 舒英钢 蔡璐[2] 斯昇亮 金建华 黄铁锋 

机构地区：[1]诸暨市菲达宏宇环境发展有限公司,浙江诸暨311800 [2]中国科学院地理科学与资源研究所,北京100101

出　　处：《中国给水排水》2012年第21期79-81,共3页China Water & Wastewater

基　　金：浙江省重大科技专项(2008C13018);国家高技术研究发展计划(863)项目(2009AA064301)

摘　　要：污水处理系统添加水蚯蚓后处理城市生活污水,研究其对重金属迁移转化的影响。试验结果表明,添加水蚯蚓能促进污泥对重金属As、Cd、Cr、Cu、Ni、Pb、Zn的富集,水蚯蚓自身也吸收一部分重金属,此外还有助于污泥中的重金属由不稳定态向稳定态转化,从而高效去除污水中的重金属。同时,污泥减量达53.8%,且污泥中重金属的浓度增大,稳定态所占比例增加,系统出水水质可稳定达到《城镇污水处理厂污染物排放标准》(GB 18918—2002)的要求。The influence of adding Tubifex on heavy metal transport in the municipal sewage treatment system was investigated. Sludge digestion by Tubifex led to an evident concentration of heavy metals （ As, Cd, Cr, Cu, Ni, Pb and Zn） in digested-sludge and a bioaccumulation of heavy metals in Tubifex. Moreover, adding Tubifex helped heavy metals to transform from unstable state to stable state, thereby removing heavy metals from sewage effectively. 53.8% of sludge reduction was achieved, the concentrations of heavy metals in sludge and the proportions of heavy metals in residual form were increased. The effluent quality met the Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant （GB 18918 - 2002）.

关 键 词：污水处理 污泥 水蚯蚓 重金属 

分 类 号：X703[环境科学与工程—环境工程]