Department of Civil and Environmental Engineering, Rice University, Houston, TX 77005, United States.
Department of Chemical and Food Engineering, Federal University of Santa Catarina, 88040-970 Florianópolis, SC, Brazil.
Water Res. 2018 Mar 1;130:105-114. doi: 10.1016/j.watres.2017.11.037. Epub 2017 Nov 14.
Strategies to control biofouling without using antimicrobial chemicals are needed to prevent the spread of antibiotic resistance genes and disruption of microbial activities in biological treatment. This study developed an environmentally friendly biofouling resistant membrane by incorporating d-tyrosine onto a commercial nanofiltration membrane using FAU type zeolite nanoparticles that covalently bound to the membrane surface as carriers for slow release. The d-tyrosine loaded membrane had similar water permeability as the unmodified membrane, but greatly reduced initial cell attachment and strongly inhibited subsequent biofilm formation without inactivating the bacteria. The membrane slowly released d-tyrosine in the time course of over 5 days, and retained its anti-biofouling capability in repeated 24 h efficacy tests for as long as 6 days. In nanofiltration operation, the d-tyrosine incorporated zeolite coating completely inhibited cell adhesion on the membrane surface and significantly alleviated membrane flux decline.
需要采取策略来控制生物污垢,而无需使用抗菌化学品,以防止抗生素耐药基因的传播和生物处理中微生物活性的破坏。本研究通过使用共价结合到膜表面的 FAU 型沸石纳米颗粒作为载体来将 d-酪氨酸缓慢释放到商业纳滤膜上,开发了一种环保的抗生物污垢膜。负载 d-酪氨酸的膜具有与未改性膜相似的水透过性,但大大降低了初始细胞附着,并强烈抑制了随后的生物膜形成,而不会使细菌失活。该膜在超过 5 天的时间内缓慢释放 d-酪氨酸,并在长达 6 天的重复 24 小时功效测试中保留其抗生物污垢能力。在纳滤操作中,掺入 d-酪氨酸的沸石涂层完全抑制了细胞在膜表面的粘附,并显著减轻了膜通量的下降。