The effect of different carbon sources on biofouling in membrane fouling simulators: microbial community and implications

• Published in: Biofouling (Chur, Switzerland) Vol. 38; no. 8; pp. 747 - 763
• Main Authors: Cabrera, Johny, Guo, Hao-yu, Yao, Jia-long, Wang, Xiao-mao
• Format: Journal Article
• Language: English
• Published: Abingdon Taylor & Francis 14.09.2022; Taylor & Francis Ltd
• Subjects: Acetates; Acetic acid; Adenosine triphosphate; ATP; Bacteria; Biofilms; Biofouling; Carbon; Carbon sources; Extracellular polymers; Filtration; Fouling; membrane fouling simulator; Membrane processes; Membranes; microbial communities; Microbiomes; Microorganisms; Nanofiltration; Nanotechnology; nutrients; Polymers; Pressure drop; Relative abundance; rRNA; Simulators
• ISSN: 0892-7014; 1029-2454
• DOI: 10.1080/08927014.2022.2129017

Biofouling is a problem affecting the operation of nanofiltration systems due to the complexity of the carbon matrix affecting bacteria and biofilm growth. This study used membrane fouling simulators to investigate the effects of five different carbon sources on the biofouling of nanofiltration membranes. For all the carbon sources analyzed, the increase in pressure drop was most accelerated for acetate. The use of acetate as the single carbon source produced less adenosine triphosphate but more extracellular polymers than glucose. The microbial community was analyzed using 16 s rRNA. The use of more than a single carbon source produced an increase in bacteria diversity even at similar concentrations. The relative abundance of proteobacteria was the highest at the phylum level (95%) when a single carbon source was added. Additionally, it was found that the use of different carbon sources produced a shift in the microbial community, affecting the biofouling and pressure drop on membranes.