Biofilms formation in nanofiltration membranes
Keywords:
nanofiltration membrane, biofouling, biocide, sulfate reducing bacteria, seawaterAbstract
The objective of this work was to study the formation of biofouling on the surface of commercial nanofiltration membrane (Osmonics / GE) and surface membrane synthesized in our laboratory. The study was conducted in permeation system with filtration cell with tangential displacement of 15 bar for 8 days flow. DBNPA ((2,2-dibromo-3-nitrilopropionamide) was used as a biocide agent, and an anti-fouling, in concentrations of 5 and 300 ppm, respectively, added to the water coming from the Beach Sea Galleon, RJ .The results demonstrated that there was no change in the flow and rejection of sulphate ions, even in the presence of anti-fouling. The count of aerobic, anaerobic and BRS (sulfate reducing bacteria) in seawater before and after using the DBNPA showed efficiency in controlling these groups of microorganisms and biofouling microbial consortium consisting of the existing in seawater.
References
MULDER, M. Basic principles of membrane technology, Dordrecht: Kluwer Academic, 1991. 363 p.
BANNOUD, A. H. Elimination of hardness and sulphate from water by Nanofiltration. Desalination, Amsterdam, v. 137, n. 1/3, p. 133-139, mai. 2001.
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Copyright (c) 2018 Edna Teresa Ruas Bastos, Francisca P. F. França, Renata Oliveira da Rocha Calixto, Virgínia Carmen Rocha Bezerra, Priscila Martins da Rocha, Celina C.R. Barbosa
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