Abstract Nanofiltration and reverse osmosis are two of the most effective surface water treatment processes. They provide water of high quality and eliminate a large amount of microorganisms, organic matter and micropollutants. However, the main limitation of membrane nanofiltration is fouling, which imposes an additional cost. This study focused on the search for microorganisms capable of reducing the performance of nanofilters and also to study autoaggregation and biofilms formation by bacterial strains isolated from the nanomembranes used in the seawater desalination plant of Souk Tlata (Algeria). It provides new microbiological data on the desalination of seawater in the southern Mediterranean basin. The results revealed 14 bacterial species isolated from six fouled reverse osmosis membranes; their quantities were significant with the dominance of Raoultella sp., Klebsiella sp., Staphylococcus sp., Stenotrophomonas sp., Micrococcus sp., and Escherichia coli. In addition, electron imaging of nanomembrane surfaces revealed complex structures of microorganisms forming biofilms.

中文翻译：

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地中海海水淡化反渗透膜上细菌生物膜的鉴定

摘要 纳滤和反渗透是两种最有效的地表水处理工艺。它们提供高质量的水并消除大量微生物、有机物和微污染物。然而，膜纳滤的主要限制是结垢，这会增加额外的成本。这项研究的重点是寻找能够降低纳米过滤器性能的微生物，并研究从 Souk Tlata（阿尔及利亚）海水淡化厂使用的纳米膜中分离的细菌菌株的自聚集和生物膜形成。它提供了关于地中海南部盆地海水淡化的新微生物数据。结果表明，从六个污染的反渗透膜中分离出了 14 种细菌；它们的数量显着，以 Raoultella sp.、Klebsiella sp.、Staphylococcus sp.、Stenotrophomonas sp.、Micrococcus sp. 和 Escherichia coli 为主。此外，纳米膜表面的电子成像揭示了微生物形成生物膜的复杂结构。