Nakao Takahito, Miura Yuki, Furuichi Kenji, Yasukawa Masahiro
Desalination Membrane Department, Toyobo Co., Ltd., Osaka 530-8230, Japan.
Graduate School of Science, Technology and Innovation, Kobe University, 1-1 Rokkodai, Nada, Kobe 657-8501, Japan.
Membranes (Basel). 2021 Mar 8;11(3):183. doi: 10.3390/membranes11030183.
Cellulose triacetate (CTA)-based hollow fiber (HF) membrane is one of the commercially successful semipermeable membranes that has had a long progress since the time the excellent semi-permeable feature of cellulose-based polymers was found in 1957. Because of the reliable and excellent performances, especially for drinking water production from seawater, CTA-HFs have been widely used as reverse osmosis (RO) membranes, especially in arid regions. In this review, recent developments and research trends on CTA-HF membranes for seawater reverse osmosis (SWRO) plants were presented. A flux analytical model, an optimization strategy for chlorine injection without losing salt rejection performance, and a module of current high performance CTA RO membranes along with its plant operation data were updated in this paper. Furthermore, a newly developed CTA-HF membrane for brine concentration (BC) application (called BC membrane) was also addressed. Finally, RO/BC hybrid operation was introduced as an effective SWRO desalination technique that enables minimizing the volume of brine disposal from the RO plant by increasing the recovery ratio and the subsequent amount of produced freshwater, without an additional energy input.
三醋酸纤维素（CTA）基中空纤维（HF）膜是商业上成功的半透膜之一，自1957年发现纤维素基聚合物优异的半透特性以来，其发展历程漫长。由于性能可靠且优异，特别是在海水生产饮用水方面，CTA-HF膜已被广泛用作反渗透（RO）膜，尤其是在干旱地区。在本综述中，介绍了用于海水反渗透（SWRO）装置的CTA-HF膜的最新进展和研究趋势。本文更新了通量分析模型、不损失脱盐性能的氯注入优化策略、当前高性能CTA RO膜组件及其装置运行数据。此外，还讨论了一种新开发的用于盐水浓缩（BC）应用的CTA-HF膜（称为BC膜）。最后，介绍了RO/BC混合运行作为一种有效的SWRO海水淡化技术，该技术能够在不额外输入能量的情况下，通过提高回收率和随后的淡水产量，将RO装置的盐水处理量降至最低。
