气候变化领域集成服务门户(CCPortal): Reclaimed seawater discharge - Desalination brine treatment and resource recovery system

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DOI	10.1016/j.watres.2023.121096
	Reclaimed seawater discharge - Desalination brine treatment and resource recovery system
	Tu, Wei Han; Zhao, Ya; Chan, Wei Ping; Lisak, Grzegorz
发表日期	2024
ISSN	0043-1354
EISSN	1879-2448
起始页码	251
卷号	251
英文摘要	With the proliferation of reverse osmosis technology, seawater reverse osmosis desalination has been heralded as the solution to water scarcity for coastal regions. However, the large volume of desalination brine produced may pose an adverse environmental impact when directly discharged into the sea and result in energy wastage as the seawater pumped out is dumped back into the sea. Recently, zero liquid discharge has been extensively studied as a way to eliminate the aquatic ecotoxicity impact completely, despite being expensive and having a high carbon footprint. In this work, we propose a new strategy towards the treatment of brine to seawater level for disposal, dubbed reclaimed seawater discharge (RSD). This process is coupled with existing resource recovery techniques and waste alkali CO2 capture processes to produce an economically viable waste treatment process with minimal CO2 emissions. In this work, we placed significant focus on the electrolysis of brine, which simultaneously lowers the salinity of the desalination brine (56.0 +/- 2.1 g/L) to seawater level (32.0 +/- 1.4 g/L), generates alkali brine from seawater (pH 13.6) to remove impurities in brine (Mg2+ and Ca2+ to below ppm level), and recovers magnesium hydroxide, calcium carbonate, chlorine, bromine, and hydrogen gas as valuable resources. The RSD is further chemically dechlorinated and neutralised to pH 7.3 to be safe to discharge into the sea. The excess alkali brine is used to capture additional CO2 in the form of bicarbonates, achieving net abatement in climate change impact (9.90 CO2 e/m3) after product carbon abatements are accounted.
英文关键词	Reclaimed seawater; Desalination brine; Electrolysis; Wastewater treatment; Safe to discharge; Resource recovery
语种	英语
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
WOS类目	Engineering, Environmental ; Environmental Sciences ; Water Resources
WOS记录号	WOS:001153673800001
来源期刊	WATER RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/299792
作者单位	Nanyang Technological University
推荐引用方式 GB/T 7714	Tu, Wei Han,Zhao, Ya,Chan, Wei Ping,et al. Reclaimed seawater discharge - Desalination brine treatment and resource recovery system[J],2024,251.
APA	Tu, Wei Han,Zhao, Ya,Chan, Wei Ping,&Lisak, Grzegorz.(2024).Reclaimed seawater discharge - Desalination brine treatment and resource recovery system.WATER RESEARCH,251.
MLA	Tu, Wei Han,et al."Reclaimed seawater discharge - Desalination brine treatment and resource recovery system".WATER RESEARCH 251(2024).