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Influence of pre-treatment methods on membrane distillation efficiency for treating concentrated leachate from membrane filtration

Authors： LI Feng, JIA Xiaolin, WANG Ruijing, YAO Mingduo, HOU Deyin

Units： 1.National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China；2.University of Chinese Academy of Sciences, Beijing 100049, China

KeyWords： leachate；air-gap membrane distillation；concentrated leachate from membrane filtration；membrane distillation efficiency

ClassificationCode：X52；TQ319

year,volume(issue):pagination： 2024,44(1):114-122

Abstract：

The efficient treatment of concentrated leachate has become an urgent need in the field of municipal and environmental pollution control. In this study, the concentrated leachate from a garbage landfill in Beijing was taken as the research object, and a combination process of "pretreatment-air gap membrane distillation" was used for its reduction treatment. We studied the effects of different combination processes on the treatment efficiency of the concentrated leachate. From a practical perspective, coagulation and precipitation pretreatment has the best operational guarantee effect on the reduction process of the concentrated leachate, and can reduce the concentrated leachate of garbage by more than 80%. We found that suitable pretreatment can significantly reduce membrane fouling, thereby directly affecting the stability of membrane distillation permeation flux and the volume reduction rate of the concentrated leachate.

Funds：

国家重点研发计划项目（2023YFC3207002），国家自然科学基金面上项目（51978650）

AuthorIntro：

李枫（1988-），男，山东肥城，助理研究员，工学博士，膜法工业废水处理及资源化，E-mail：fengli@rcees.ac.cn

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