MVR强制循环蒸发技术处理垃圾填埋场渗滤液膜浓缩液

The MVR Forced Cycle Evaporation Technology for the Treatment of the Landfill Leachate Membrane Concentrate

以江西某生活垃圾填埋场渗滤液膜浓缩液处理工程为案例,阐述了预处理+MVR强制循环蒸发结晶+母液干化的技术优势及应用前景。工程实践表明:该技术可有效降低硬度、CODCr等指标,且能将Na^(+)、K^(+)、Cl^(-)等无机杂盐形成晶体提取出系统;处理后的出水水质稳定达到GB 16889—2008生活垃圾填埋场污染控制标准中表2排放限值的要求;母液经过干化处理后含水率降低了75.9个百分点,达到了废物减量从而降低外运费用的目的。经过超过1 a的正式运行,该案例各项性能指标良好,该技术可以应用于膜浓缩液的处理。

The treatment project of leachate membrane concentrate in a domestic waste landfill in Jiangxi Province was taken as a case,the technical advantages and application prospects of pretreatment+MVR forced cycle evaporation crystallization+mother liquid drying were expounded.The practical engineering showed that the technology could effectively reduce hardness,CODCrand other indexes.Moreover,inorganic miscellaneous salts such as Na^(+),K^(+)and Cl^(-)could be formed into crystals and extracted from the system.The treated effluent water quality stably meet the requirements of the emission limits of table 2 in the GB 16889—2008 Standard for Pollution Control on the Landfill Site of Municipal Solid Waste.The moisture content of the mother liquid was reduced by 75.9 percentage points after drying treatment,achieved the purpose of reducing the waste quantity to reduce the cost of external transportation.After more than one year of formal operation,the performance indicators of this case were good,and the technology could be applied to the treatment of membrane concentrate.