Lee Wontae
Department of Environmental Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi 39177, Republic of Korea.
Department of Environmental Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi 39177, Republic of Korea.
Sci Total Environ. 2019 Sep 1;681:551-563. doi: 10.1016/j.scitotenv.2019.05.062. Epub 2019 May 8.
Water resources are becoming scarce meaning that reuse options are receiving more and more attention. In this perspective, zero-liquid discharge (ZLD) is considered as an emerging technique to minimize waste, recover resources, treat toxic industrial waste streams, and mitigate potential water quality impacts in receiving water streams. Although ZLD systems are capable of minimizing contamination of water sources and amplifying water supply, its industrial scale applications are restricted due to their high cost and intensive energy consumption. In ZLD systems, membrane-based technologies are an attractive future strategy for industrial wastewater reclamation. Therefore, this review examines why a greater focus on environmental protection and water security is leading to more widespread adoption of ZLD technology in various industries. We highlight existing ZLD processing schemes, including thermal and membrane-based processes, and discuss their limitations and potential solutions. We also investigated global application of ZLD systems for resource recovery from wastewater. Finally, we discuss the potential environmental impacts of ZLD technologies and provide some focus on future research needs.
水资源正变得稀缺,这意味着水的再利用选项正受到越来越多的关注。从这个角度来看,零液体排放(ZLD)被视为一种新兴技术,可最大限度地减少废物、回收资源、处理有毒工业废水流,并减轻受纳水体中潜在的水质影响。尽管ZLD系统能够最大限度地减少水源污染并扩大供水,但由于其成本高昂和能源消耗大,其工业规模应用受到限制。在ZLD系统中,基于膜的技术是工业废水回收的一种有吸引力的未来策略。因此,本综述探讨了为何对环境保护和水安全的更多关注正导致ZLD技术在各个行业中得到更广泛的应用。我们重点介绍了现有的ZLD处理方案,包括基于热和膜的工艺,并讨论了它们的局限性和潜在解决方案。我们还研究了ZLD系统在全球范围内从废水中回收资源的应用。最后,我们讨论了ZLD技术的潜在环境影响,并对未来的研究需求提出了一些重点。
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