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| DOI | 10.1016/j.watres.2023.121096 |
| Reclaimed seawater discharge - Desalination brine treatment and resource recovery system | |
| 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/299791 |
| 作者单位 | Nanyang Technological University |
| 推荐引用方式 GB/T 7714 | . Reclaimed seawater discharge - Desalination brine treatment and resource recovery system[J],2024,251. |
| APA | (2024).Reclaimed seawater discharge - Desalination brine treatment and resource recovery system.WATER RESEARCH,251. |
| MLA | "Reclaimed seawater discharge - Desalination brine treatment and resource recovery system".WATER RESEARCH 251(2024). |
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