Enhancement Effects of Cationic Contaminants from Bacteria on Cake Layer Formation and Biofouling on an RO Membrane
Enhancement Effects of Cationic Contaminants from Bacteria on Cake Layer Formation and Biofouling on an RO Membrane
复制标题
细菌阳离子污染物对 RO 膜上滤饼层形成和生物污垢的增强作用
DOI：
10.1007/s12257-017-0093-4
复制
发表时间：
2017
影响因子：
3.2
通讯作者：
and Norihiro Kato
中科院分区：
文献类型：
--
作者：
Shun Yamanouchi;Eri Nasuno;Masaki Ohno;Chigusa Okano;Ken-ichi Iimura;Tetsuji Okuda;Wataru Nishijima;and Norihiro Kato
模型阳离子分子灵菌红素与聚酰胺/聚砜复合反渗透（RO）膜相互作用，导致膜渗透速率降低。灵菌红素是一种由粘质沙雷氏菌产生的抗菌剂，经常从生活或工业废水的活性污泥中分离出来。认为分别从活细胞或死细胞分泌或泄漏的此类分子影响膜生物污染。在这项研究中，细胞悬浮液含有灵菌红素生产S。将marcescensAS-1野生型或非生产AS-1Δ sture Isture菌株进料至薄RO膜以测定膜上的闭塞比。阳离子灵菌红素通过堵塞孔隙和增强滤饼层的积累来增强膜生物污染。在用水进料去除滤饼层后，这些效果显著恢复了包藏比。暂时减压后，AS-1和AS-1Δ sture I的闭塞率分别从约70%恢复至49%和23%的稳定水平。Zetapotential分析支持的中和作用，导致细菌细胞的积累下施加的高压RO膜渗透。
The model cationic molecule prodigiosin interacted with a polyamide/polysulfone composite reverse osmosis (RO) membrane, resulting in a reduction of the membrane permeation rate. Prodigiosin is an antibacterial agent produced bySerratia marcescensthat is frequently isolated from activated sludge of domestic or industrial wastewater. Such molecules respectively secreted or leaked from live or dead cells are thought to affect membrane biofouling. In this study, a cell suspension containing prodigiosin-producingS. marcescensAS-1 wild-type or the non-producing AS-1ΔspnIstrain was fed to the thin RO membrane to determine the occlusion ratio on the membrane. Cationic prodigiosin enhanced membrane biofouling by clogging the pores and enhanced the accumulation of the cake layer. The effects remarkably recovered the occlusion ratio after removing the cake layer by feeding with water. After temporary pressure relief, the occlusion ratios for AS-1 and AS-1ΔspnIwere recovered to stable levels from approximately 70 to 49% and 23%, respectively. Zetapotential analysis supported the neutralization effects leading to the accumulation of bacterial cells under applied high pressure for RO membrane permeation.