混凝Fenton联合工艺处理垃圾渗滤液膜滤浓缩液

Treatment of Membrane Concentrate Generated from Landfill Leachate by Coagulation Fenton Process

为了去除垃圾渗滤液膜滤浓缩液中的污染物,文中通过混凝实验选择了混凝剂,寻找出了最优混凝剂的最佳运行pH值和投加量;同时通过Fenton试验确定了FeSO_(4)·7H_(2)SO_(4)和H 2O_(2)的投加量,最终形成了混凝与Fenton氧化联合的工艺。研究结果表明:文中工艺可以有效去除浓缩液中的COD和色度,最佳混凝剂为FeCl_(3),当初始pH为4,FeCl_(3)的量为400 mg·L^(-1),FeSO_(4)·7H_(2)SO_(4)量为250 mg·L^(-1),H_(2)O_(2)量为1 mL·L^(-1)时,可以得到最优的去除效果,两种污染物的去除率分别为76.75%和85.18%。结论可为相近水质的垃圾渗滤液膜滤浓缩液的处理提供理论依据。

In order to remove pollutants in membrane filtration concentrates of waste leachate,a coagulation experiment was conducted,in which coagulants were selected and their optimum pH value and dosage were determined.The dosages of FeSO_(4)·7H_(2)SO_(4)and H_(2)O_(2)were determined through the Fenton test,hence came the process which combines coagulation and Fenton oxidation.The experimental results show that COD and chromaticity can be removed effectively from concentrates by the process.The best coagulant is FeCl 3.When the initial pH is_(4),the dosages of FeCl 3,FeSO_(4)·7H_(2)SO_(4),and H_(2)O_(2)are_(4)00 mg·L^(-1),250 mg·L^(-1)and 1 mL·L^(-1)respectively,the best result can be obtained that 76.75%and 85.18%of the two pollutants,respectively,removed.This study can provide a theoretical basis for the treatment of membrane filtration concentrates of waste leachate in the water of similar quality.