我国垃圾渗滤液膜浓缩液处理现状与污染控制建议

垃圾渗滤液膜浓缩液是膜工艺处理垃圾渗滤液的副产物，相比垃圾渗滤液，具有更高浓度的有机污染物、无机盐和金属离子，且生化性较差，若处置不当会造成更严重的二次污染。通过对国内外膜浓缩液处理典型工艺的分析，探讨回灌、高级氧化、蒸发、“预处理+高级氧化+深度处理”等不同工艺的处理效果、存在问题以及工程应用现状。根据实际调研情况，我国膜浓缩液的安全处理尚处于起步阶段，高级氧化、浸没燃烧蒸发(SCE)和机械式蒸汽再压缩(MVC/MVR)等工程应用技术也仅为小试或中试规模。为有效保障我国膜浓缩液安全处置，建议从源头减少膜浓缩液产量，改进并完善已有膜浓缩液处理技术，开发膜浓缩液资源化利用技术，妥善处理膜浓缩液二次污染物。

Treatment Status and Pollution Control Suggestions for Membrane Concentrated Leachate in China

Membrane filtration concentrated leachate is the by-product during treating landfill leachate by membrane technology. Compared with landfill leachate, it contains a higher concentration of organic pollutants, inorganic salts and metal ions, with poor biodegradability, and can result in more serious secondary pollution if without proper disposal. The typical treatment processes of membrane concentrated leachate at home and broad were analyzed, and the treatment effects, existing problems and current situation of engineering application of different processes, such as recharge, advanced oxidation, evaporation and “pretreatment + advanced oxidation + advanced treatment”, were discussed. According to the actual investigations, the safe disposal of membrane concentrated leachate in China was still at an early stage. Meanwhile, engineering application technologies, like advanced oxidation, submerged combustion evaporation (SCE) and mechanical vapor recompression (MVC/MVR) were only at laboratory or pilot scale. In order to ensure the safe disposal of concentrated leachate effectively, it was recommended that the concentrated leachate productions need to be reduced from the source; the existing processing techniques of concentrated leachate need to be improved and perfected; the resource utilization technology of concentrated leachate need to be developed; the secondary pollutants of the treatment of concentrated leachate need to be treated properly.