化工进展 ›› 2024, Vol. 43 ›› Issue (11): 6443-6457.DOI: 10.16085/j.issn.1000-6613.2023-1871

• 资源与环境化工 • 上一篇    

正渗透处理垃圾渗滤液的研究及工程实践进展

蒋兰英1,2,3(), 李振1, 陈聪1   

  1. 1.中南大学冶金与环境学院,湖南 长沙 410083
    2.国家重金属污染防治工程技术研究中心,湖南 长沙 410083
    3.水环境与农产品安全湖南省重点实验室,湖南 长沙 410083
  • 收稿日期:2023-10-24 修回日期:2024-02-17 出版日期:2024-11-15 发布日期:2024-12-07
  • 通讯作者: 蒋兰英
  • 作者简介:蒋兰英(1974—),女,博士,教授,研究方向为膜分离。E-mail:jianglanyingsme@csu.edu.cn
  • 基金资助:
    湖南省教育厅重点项目(22A0003);大学生省级创新创业项目(S2022105331030)

Research and application progress of landfill leachate treatment by forward osmosis

JIANG Lanying1,2,3(), LI Zhen1, CHEN Cong1   

  1. 1.School of Metallurgy and Environment, Central South University, Changsha 410083, Hunan, China
    2.National Heavy Metal Pollution Prevention and Control Engineering Technology Research Center, Changsha 410083, Hunan, China
    3.Hunan Provincial Key Laboratory of Water Environment and Agricultural Product Safety, Changsha 410083, Hunan, China
  • Received:2023-10-24 Revised:2024-02-17 Online:2024-11-15 Published:2024-12-07
  • Contact: JIANG Lanying

摘要:

正渗透(FO)是一种“复活”的膜分离技术。FO过程中水的过膜自发传递及水压低的特点使其具备了低能耗、污染小的独特优势。本文在对FO的分离基本原理、膜材料、汲取液的研究前沿以及产业发展现状进行简要介绍的基础上,汇总了全球有关FO处理垃圾渗滤液的研发现状,包括组合工艺的开发、膜污染的防治、汲取液的选择和回收、有价物的回收、工艺技术经济分析以及工程实践等。通过分析指出,FO+生物电化学系统(BES)在水回收的能耗、物耗方面优势显著,有良好的发展前景。间歇性渗透弛豫(IOR)反冲洗能有效去除膜污染,且过程不需要额外能量和化学试剂,易于操作,值得进一步的探讨。FO的技术经济特性对其在垃圾渗滤液处理中的应用非常关键,需要更加详细地了解。此外,现有商业FO膜的选择性普遍不高,导致汲取液的污染和垃圾渗滤液处理过程效率的下降,关于如何有效控制膜的选择性问题仍然需要关注。期待随着研究的不断深入,最大程度发挥出FO的优势,为垃圾渗滤液处理行业可持续发展提供有效途径。

关键词: 正渗透, 垃圾渗滤液, 工程实践

Abstract:

Forward osmosis (FO) is a "resurgent" separation technology. For FO process, the spontaneous transport of water across the membrane and the low hydraulic pressure together renders its unique advantages in terms of low energy consumption and low fouling. This review first summarized the fundamentals of FO separation, the research frontiers of FO membrane materials and draw solutions, and industry development status. Thereafter, we introduced global R&D progress for landfill leachate treatment by FO, covering development of combined processes, fouling control, selection/recovery of draw solutions, recycle of valuables, techno-economic analysis, and engineering practice. The review indicated that FO+Bio-electrochemical system (BES) has great prospects due to the low energy and mass consumption in water recycling. Intermittent osmotic relaxation (IOR) backwash can efficiently remove foulant, consumes no energy and chemicals, and is easy to operate, hence deserving further investigation. Techno-economic characteristics of FO is critical for its application in treating landfill leachate and needs more detailed understanding. Additionally, a problem with currently commercialized FO membranes is the low selectivity, which led to contamination of draw solution and deterioration of landfill leachate treatment process efficiency, and therefore sound control of membrane selectivity cannot be neglected. It is expected that with the deepening of research, the advantages of FO will be exerted to the greatest extent, providing effective solutions for the sustainable development of landfill leachate treatment industry.

Key words: forward osmosis, landfill leachate, engineering practice

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