Designing a next generation solar crystallizer for real seawater brine treatment with zero liquid discharge

Chenlin Zhang, Yusuf Shi, Le Shi, Hongxia Li, Renyuan Li, Seunghyun Hong, Sifei Zhuo, Tiejun Zhang, Peng Wang

Research output: Contribution to journalArticlepeer-review

Abstract

AbstractProper disposal of industrial brine has been a critical environmental challenge. Zero liquid discharge (ZLD) brine treatment holds great promise to the brine disposal, but its application is limited by the intensive energy consumption of its crystallization process. Here we propose a new strategy that employs an advanced solar crystallizer coupled with a salt crystallization inhibitor to eliminate highly concentrated waste brine. The rationally designed solar crystallizer exhibited a high water evaporation rate of 2.42 kg m$^{−2}$ h$^{−1}$ under one sun illumination when treating real concentrated seawater reverse osmosis (SWRO) brine (21.6 wt%). The solar crystallizer array showed an even higher water evaporation rate of 48.0 kg m$^{−2}$ per day in the outdoor field test, suggesting a great potential for practical application. The solar crystallizer design and the salt crystallization inhibition strategy proposed and confirmed in this work provide a low-cost and sustainable solution for industrial brine disposal with ZLD.
Original languageEnglish (US)
JournalNature Communications
Volume12
Issue number1
DOIs
StatePublished - Feb 12 2021

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