A Case Study Based on MBR+Nanofiltration Process of Landfill Leachate
As the leachate of landfill site has complex water quality,high pollutant concentration,and is suscepti-ble to various environmental influences and water quality changes,it is difficult to treat the leachate,and a variety of combined treatment methods are needed to achieve the standard discharge.Therefore,it is of great significance to study the treatment process of landfill leachate.Taking a domestic waste landfill project in Xi'an as an example,this study introduced each link of the treatment process of"pretreatment+homogenization tank+external MBR+nanofiltration+reverse osmosis"in the project.The external membrane biochemical reactor includes primary denitrification and nitrification,secondary denitrification and nitrification and external ultrafiltration unit,while the nanofiltration process consists of a nanofiltration concentrate reduction treatment system,an intermediate con-centrate treatment system and a reverse osmosis concentrate treatment system.It is proven that the combined process can operate efficiently and stably,and the treated effluent COD,BOD,NH3-N and SS meet the require-ments of relevant national standards,which is a guide for the development of feasible landfill leachate treatment process.
万方数据
维普
