Correlation between microbial community structure and biofouling as determined by analysis of microbial community dynamics

Bioresource Technology
Xuechao GuoXu-Xiang Zhang

Abstract

Three lab-scale membrane bioreactors (MBRs) were continuously operated to treat saline wastewater under 0%, 0.75% and 1.5% NaCl stress. 0.75% and 1.5% NaCl reduced the COD and NH4(+)-N removal at the beginning, while the removal efficiencies could be recovered along with the operation of MBRs. Also, the polysaccharide in extracellular polymeric substances (EPS) and soluble microbial products (SMP) played an important role in the membrane fouling. Illumina sequencing of 16S rRNA gene showed that the increasing level of salinity reduced the diversity of the microbial community, and a higher salinity stimulated the growth of Bacteroidetes. At genus level, Flavobacterium, Aequorivita, Gelidibacter, Microbacterium, and Algoriphagus increased with the increase of salinity, which are shown to be highly salt tolerant. The strength of salinity or the duration of salinity could stimulate the microorganisms with similar functions, and the changes of polysaccharide in EPS and SMP were closely related to the membrane fouling rate as well as correlated with some saline-resistance genera.

References

Jun 5, 2004·Journal of Hazardous Materials·Elisabeth NeyensBart De heyder
Oct 31, 2006·Water Research·Olivier Lefebvre, René Moletta
Jun 17, 2009·International Journal of Systematic and Evolutionary Microbiology·Chung Y HwangByung C Cho
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Apr 2, 2014·Bioresource Technology·Trilok Chandra YadavAtya Kapley
Jul 16, 2014·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Dao GuanG H Chen

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Citations

Nov 21, 2020·The Science of the Total Environment·Yuya TakimotoTakashi Yamaguchi
Aug 8, 2021·International Journal of Environmental Research and Public Health·Huaihao XuChun Hu

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