作　　者： ; ; ; ; ;

机构地区： 湖南大学环境科学与工程学院

出　　处： 《环境科学》 2009年第11期3371-3376,共6页

摘　　要： 采用外循环三相流化床-人工湿地的组合工艺对垃圾渗滤液进行处理,主要探讨通过该组合工艺后,出水水质的变化.结果表明,进水COD 4 000 mg.L-1、NH4+-N 300 mg.L-1通过外循环流化床后,COD、NH4+-N分别稳定在1 500 mg.L-1和150 mg.L-1左右;Cd、Zn、Pb含量也均稍有下降,通过人工湿地后,COD、NH4+-N则分别下降到200 mg.L-1和10 mg.L-1左右.Cd、Zn、Pb的含量在分别从进水的0.12 mg.L-1、3.0 mg.L-1和1.4 mg.L-1下降到0.01 mg.L-1、0.5 mg.L-1和0.1 mg.L-1左右.通过不同植被的湿地进行横向比较,发现无论何种植被的湿地,对该组合工艺的处理效果影响不大. In this study, the system composed with the external loop fluidized bed reactor and constructed wetland was used to treat the landfill leachate. The change of water quality for the landfill leachate treated by this system was investigated. The experimental results indicated that the COD and NH4＋ -N of the influent reduced from 4000 mg·L^-1 and 300 mg·L^-1 to 1 500 mg·L^-1 and 150 mg·L^-1 after the external loop three phase fluidized bed reactor and steady at 200 mg·L^-1 and 10 mg·L^-1 behind treated by the constructed wetland. The heavy metals of Cd, Zn, Pb were also reduced for treatment by external loop three phase fluidized bed reactor. They were steady at 0.01 mg·L^-1, 0.5 mg·L^-1, 0.1 mg·L^-1 from 0.12 mg·L^-1 , 3.0 mg·L^-1, 1.4 mg·L^-1because of the constructed wetland. We also compared the different plants for the efficiency, the results showed that whatever plants, there was little effects on the efficiency of the COD and NH4＋ -N, but the effect of heavy metal was markedness.

关 键 词： 外循环流化床 人工湿地 重金属 渗滤液 本底值

领　　域： [环境科学与工程]