Laboratorio de Ecología Microbiana, Centro de Bioinnovación, Facultad de Ciencias del mar y recursos biológicos, Universidad de Antofagasta, Antofagasta, Chile.
Australian Centre for Ancient DNA, School of Biological Sciences, University of Adelaide, Adelaide, Australia.
Biofouling. 2020 May;36(5):505-515. doi: 10.1080/08927014.2020.1776268. Epub 2020 Jun 16.
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 sp. strain Ni1-LEM. The characterization of the bacterial community revealed that the most abundant taxa in ROMs were the genera and , and unclassified species of the families Flavobacteriaceae and Sphingomonadaceae. This bacterial community significantly decreased upon treatment with the supernatant from sp. Ni1-LEM, resulting in the prevalence of the genus . 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.
反渗透膜（ROM）中的生物污垢控制具有挑战性，因为处理成本高，且会降低 ROM 的使用寿命。本研究对海水淡化厂中 ROM 中的生物污垢进行了特征描述，并报告了使用 sp. 菌株 Ni1-LEM 获得的上清液有效去除生物污垢的情况。细菌群落的特征分析表明，ROM 中最丰富的类群是 和 属，以及黄杆菌科和鞘氨醇单胞菌科的未分类种。用 sp. Ni1-LEM 的上清液处理后，这种细菌群落显著减少，导致 属的流行。此外，这种细菌上清液还显著抑制了从 ROM 中分离出的七种底栖微藻的细胞黏附，并促进了现有微生物生物膜的细胞脱落。研究表明，细胞外上清液在不产生任何杀菌作用的情况下改变了 ROM 中生物污垢中细胞外聚合物（EPS）的构象。
