文献类型：期刊文献

英文题名：Forward osmosis for multi-effect distillation brine treatment: Performance and concentration polarization evaluation

作者：Yang, Ye[1];Sun, Yuzhu[1,2,3];Song, Xingfu[1,3];Yu, Jianguo[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake R, Shanghai 200237, Peoples R China;[2]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[3]Hebei Desalinat Technol Innovat Ctr, Tangshan 063200, Hebei, Peoples R China

年份：2021

卷号：99

期号：S1

起止页码：S114

外文期刊名：CANADIAN JOURNAL OF CHEMICAL ENGINEERING

收录：;EI(收录号：20211210120977);WOS:【SCI-EXPANDED(收录号:WOS:000631171900001)】；

基金：National Key R&D Program, Grant/Award Numbers: 2016YFC0401203, 2019YFC0408204; Program of Shanghai Academic/Technology Research Leader, Grant/Award Number: 18XD1424600

语种：英文

外文关键词：brine; concentration polarization; flux; forward osmosis; seawater desalination

摘要：The discharge of reject brine from seawater desalination processes is a threat to marine ecosystems. This study investigated the feasibility of forward osmosis (FO) for the treatment of reject brine from multi-effect distillation (MED) systems. The performances of two commercial FO membranes (ie, cellulose triacetate (CTA) and polyamide thin film composite (TFC) membranes) were compared. The effects of operating conditions, such as draw solution concentration, cross-flow velocity, and temperature, on concentration polarization and consequently on the water flux, were quantitatively analyzed using a mathematical model. Results showed that the batch FO process could effectively reduce the volume of MED brine to 54.9% using 3 mol/L NaCl. As the draw solution concentration increased from 1-5 mol/L, a significant increase in the initial water flux from 3.23-17.88 L center dot m(-2) center dot h(-1) and from 3.55-24.04 L center dot m(-2) center dot h(-1) was observed for the CTA and TFC membranes, respectively. However, the proportions of the effective osmotic pressure differences decreased from 20.7% to 11.9% and from 23.5% to 6.2% for the CTA and TFC membranes, respectively, indicating the concentration polarization (CP) was severe for high-salinity brine treatment. The positive effects of increasing cross-flow velocity on CP were limited. Moreover, the high temperature of the MED brine effectively mitigated the internal concentration polarization (ICP), thereby enhancing the water flux. Overall, this study provides valuable guidance for the application and optimization of FO in MED brine treatment.