Abstract Biofouling control in reverse osmosis membranes (ROMs) is challenging due to the high cost of treatments, and reduction in the life of ROMs. This study characterizes the biofouling in the ROMs from a desalination plant and reports its effective removal using the supernatant obtained from Alteromonas sp. strain Ni1-LEM. The characterization of the bacterial community revealed that the most abundant taxa in ROMs were the genera Fulvivirga and Pseudoalteromonas, and unclassified species of the families Flavobacteriaceae and Sphingomonadaceae. This bacterial community significantly decreased upon treatment with the supernatant from Alteromonas sp. Ni1-LEM, resulting in the prevalence of the genus Pseudoalteromonas. Furthermore, this bacterial supernatant significantly inhibited cell adhesion of seven benthic microalgae isolated from ROMs as well as promoting cell detachment of the existing microbial biofilms. The study showed that the extracellular supernatant modified the conformation of extracellular polymeric substances (EPS) in the biofouling of ROMs without any biocidal effects.

中文翻译：

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使用 Alteromonas sp. 表征和去除来自智利北部海水淡化厂的反渗透膜 (ROM) 中的生物污垢。Ni1-LEM上清液

摘要 反渗透膜 (ROM) 中的生物污垢控制由于处理成本高和 ROM 寿命缩短而具有挑战性。这项研究表征了来自海水淡化厂的 ROM 中的生物污垢，并报告了使用从交替单胞菌获得的上清液的有效去除。应变 Ni1-LEM。细菌群落的特征表明，ROM 中最丰富的分类群是 Fulvivirga 和 Pseudoalteromonas 属，以及 Flavobacteriaceae 和 Sphingomonadaceae 科的未分类物种。这种细菌群落在用交替单胞菌属的上清液处理后显着减少。Ni1-LEM，导致假交替单胞菌属的流行。此外，这种细菌上清液显着抑制了从 ROM 中分离的七种底栖微藻的细胞粘附，并促进了现有微生物生物膜的细胞脱离。研究表明，细胞外上清液在 ROM 的生物污染中改变了细胞外聚合物 (EPS) 的构象，而没有任何杀生物作用。