学术论文

      "超滤/混凝-Fenton+反渗透"处理垃圾渗滤液生化出水

      Treatment of landfill leachate after biological treatment by ultrafiltration or coagulation-Fenton and reverse osmosis

      摘要:
      为降低垃圾渗滤液反渗透膜的处理负荷和运行成本,对渗滤液生化出水分别进行超滤和混凝-Fenton预处理,并对其出水进行反渗透膜污染评价.结果表明:超滤出水的膜通量由27 L/(m2·h)降至14 L/(m2·h),混凝-Fenton则由40 L/(m2·h)降至30 L/(m2·h);超滤出水的脱盐率仅有50%左右,混凝-Fenton则稳定在80%以上,后期略有下降;混凝-Fenton出水的COD去除率由72.6%逐渐上升至90.4%,超滤出水的COD去除率则由89.3%下降至76.1%;反渗透对两种处理的浊度去除率均达到90%以上.可见混凝-Fenton对水样的预处理效果优于超滤的,并能削弱浓差极化现象,提升反渗透的处理性能."混凝-Fenton+反渗透"深度处理渗滤液是一种有效降低反渗透膜负荷、延长膜运行周期的组合工艺.
      Abstract:
      In order to reduce the processing load and running cost of the reverse osmosis membrane of landfill leachate, the biochemical effluent of leachate was treated by ultrafiltration and coagulation-Fenton.Then the pollution of the reverse osmosis membrane of the two effluents was evaluated.The results showed that the membrane flux of ultrafiltration membrane decreased from 27 L /(m2·h) to 14 L/(m2·h), and coagulation-Fenton reduced from 40 L/(m2·h) to 30 L/(m2·h).The desalination rate of ultrafiltration water was only 50%, while coagulation-Fenton remained stable at more than 80%, and slightly decreased at the later stage.The COD removal rate of coagulation-Fenton effluent increased from 72.6% to 90.4%.The COD removal rate of ultrafiltration decreased from 89.3% to 76.1%.The removal rate of turbidity was both more than 90%.The pretreatment effect of coagulation-Fenton was better than that of ultrafiltration due to its weakening concentration polarization phenomenon and improving the treatment performance of reverse osmosis.Therefore, the advanced treatment of "coagulation Fenton+ reverse osmosis" is an effective method to reduce the load of reverse osmosis membrane and prolong the operation cycle of the membrane.
      Author: BU Gugang-hui XIAN Ping ZHAN Long-hui FENG Xiao-juan TANG Hai-fang
      作者单位: 广西大学环境学院,广西南宁,530004
      年,卷(期): 2017, 42(2)
      分类号: X703.1
      在线出版日期: 2017年5月16日
      基金项目: 国家自然科学基金资助项目,南宁市科学研究与技术开发计划产学研合作示范重大专项