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首页> 外文期刊>Desalination: The International Journal on the Science and Technology of Desalting and Water Purification >Controlling biofouling and disinfection by-product formation during reverse osmosis treatment for seawater desalination
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Controlling biofouling and disinfection by-product formation during reverse osmosis treatment for seawater desalination

机译：在海水淡化逆转渗透处理期间控制生物污染和消毒副产品

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Controlling membrane fouling and disinfection by-products (DBPs) is an ongoing challenge in achieving sustainable membrane-based seawater desalination. This study assessed the efficacy of a new disinfectant, stabilized hypobromite, for controlling biofouling and DBP formation during reverse osmosis (RO) membrane treatment of seawater. Accelerated chemical exposure tests revealed that stabilized hypobromite did not degrade a commercial polyamide RO membrane; thus, unlike other powerful oxidants, it is able to remain as a residual chemical on membrane surfaces. In our experiments, stabilized hypobromite also effectively inactivated bacteria in seawater and reduced potential organic foulants (e.g., humic acid-like and protein-like substances). Disinfection at a stabilized hypobromite dose of 5 mg-Cl-2/L resulted in the formation of trihalomethanes (THMs), haloacetic acids (HAAs), and bromate at 55, 29, and < 10 mu g/L, respectively. Chlorine treatment resulted in higher formations of THMs, HAAs, and bromate (80, 74, and 50 mu g/L, respectively), indicating stabilized hypobromite is superior to chlorine in this respect. Pilot-scale validation demonstrated that pre-disinfection with stabilized hypobromite enabled the RO membrane treatment to operate for half a year without significant fouling. The findings in this study indicate the great potential of stabilized hypobromite for controlling DBP formation and biofouling in seawater desalination.
机译：控制膜污垢和消毒副产品（DBPS）是实现可持续膜的海水淡化持续挑战。该研究评估了新的消毒剂稳定的脓荷米石的功效，用于控制海水的反渗透（RO）膜处理期间控制生物污垢和DBP形成。加速的化学曝光试验显示稳定的悬浮岩没有降解商业聚酰胺RO膜;因此，与其他强大的氧化剂不同，它能够在膜表面上留在残留的化学物质上。在我们的实验中，稳定的肺炎氏甲醇也有效地在海水中灭活了细菌和降低的潜在有机污垢（例如，腐殖酸样和蛋白质的物质）。在稳定的5mg-Cl-2 / L中以稳定的缺氧剂剂量消毒导致三卤代甲烷（THM），卤代乙酸（HAAs）和55,29和<10μg/ L的溴酸盐。氯处理导致较高的THM，HAAs和溴酸盐（分别为80,74和50μg/ L），表明稳定的肺结渣在这方面优于氯。试验规模验证证明，具有稳定的悬浮岩的预感染使RO膜处理能够在没有显着结垢的情况下运行半年。该研究中的研究结果表明，用于控制DBP形成和海水淡化中的DBP形成和生物污垢的稳定脓性乳石的巨大潜力。

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