Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney (UTS), 15 Broadway, NSW 2007, Australia; Department of Civil, Environmental, and Architectural Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea.
Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney (UTS), 15 Broadway, NSW 2007, Australia; ARC Research Hub for Nutrients in a Circular Economy, University of Technology Sydney (UTS), 15 Broadway, NSW 2007, Australia.
Water Res. 2023 Oct 1;244:120510. doi: 10.1016/j.watres.2023.120510. Epub 2023 Aug 19.
Membrane distillation (MD) shows promise for achieving high salinity treatment and zero liquid discharge (ZLD) compared to conventional water treatment processes due to its unique characteristics, including low energy consumption and high resulting water quality. However, performance degradation due to fouling and scaling under high recovery conditions remains a challenge, particularly considering the need to control both cations and anions for maximum scaling mitigation. Accordingly, in this study, alternating current (AC) operation for electrically conductive membrane distillation (ECMD) is newly proposed, based on its potential for controlling both cations and anions, in contrast to conventional direct current (DC) operation. Systematic experiments and theoretical analysis show that water recovery in ECMD can be increased by 27% through AC operation. The proposed modification and effective AC operation of ECMD increase the practicality of using MD in desalination for a high recovery rate, perhaps even for ZLD.
与传统的水处理工艺相比，膜蒸馏（MD）因其独特的特性，包括低能耗和高水质，显示出在高盐度处理和零液体排放（ZLD）方面的应用前景。然而，在高回收率条件下，由于结垢和结垢导致的性能下降仍然是一个挑战，特别是考虑到需要控制阳离子和阴离子以最大程度地减轻结垢。因此，在这项研究中，根据其控制阳离子和阴离子的潜力，新提出了交流电（AC）操作用于导电膜蒸馏（ECMD），与传统的直流电（DC）操作相比。系统实验和理论分析表明，通过交流操作可以将 ECMD 的水回收率提高 27%。所提出的改进和有效的 ECMD 交流操作增加了 MD 在高回收率海水淡化中的实用性，甚至可能用于 ZLD。
