Efficacy testing of non-oxidizing biocides for polyamide membrane biofouling prevention using a modified CDC biofilm reactor

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dc.contributor.authorDa-Silva-Correa, Luiz H.
dc.contributor.authorAasen, Kristen
dc.contributor.authorGamm, Nicole E.
dc.contributor.authorGodoy, Rafaela
dc.contributor.authorRahmati, Negar
dc.contributor.authorBuckley, Heather Louisa
dc.date.accessioned2024-01-25T22:14:26Z
dc.date.available2024-01-25T22:14:26Z
dc.date.copyright2023en_US
dc.date.issued2023
dc.descriptionThis work was done at the Civil Engineering Department, Green Safe Water Lab, University of Victoria, Victoria, British Columbia, Canada. The authors acknowledge the provision and support of the SEM, CLSM, BioCore, and CAMTEC research facilities at the University of Victoria.en_US
dc.description.abstractBiofouling is one of the most challenging obstacles faced by reverse osmosis (RO) membrane systems to supply potable water. Currently, biofouling is imperfectly handled by RO feed water pre-chlorination, which is associated with the production of carcinogenic disinfection by-products. To propose a safer alternative to control biofouling in RO drinking water applications, this study investigates the efficacy of five biocides to prevent and remove Pseudomonas aeruginosa biofilms from RO membranes: 2-methyl-4-isothiazolin-3-one (MIT); 2,2-dibromo-3-nitrilopropionamide (DBNPA); sodium bisulfite (SBS); sodium benzoate (SB); and ethyl lauroyl arginate (LAE). Experiments were conducted on the Center for Disease Control (CDC) Biofilm Reactor (CBR) with biocidal dosing estimated on 96-well microtiter plates. Confocal Scanning Laser Microscopy (CLSM) and Scanning Electron Microscopy (SEM) were used to analyze the biocides' anti-biofilm efficacies under dynamic conditions relative to minimum biofilm inhibitory and eradication concentrations. The results in this study indicated that LAE presented the best anti-biofilm efficacies in treating P. aeruginosa biofilms when compared to all studied biocides; it not only prevented biofilm formation (>98%) but also it effectively removed pre-established biofilms (>99%) from RO membrane coupons. Therefore, due to safety and efficacy, LAE is an excellent candidate for controlling biofouling in drinking water RO membrane systems.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipThis research was supported by NSERC Alliance Missions, Mitacs Globalink, OFI, CFI-JELF, BCKDF, and the University of Victoria.en_US
dc.identifier.citationDa-Silva-Correa, L. H., Aasen, K., Gamm, N. E., Godoy, R., Rahmati, N., & Buckley, H. L. (2023). Efficacy testing of non-oxidizing biocides for polyamide membrane biofouling prevention using a modified CDC biofilm reactor. AQUA - Water, Infrastructure, Ecosystems and Society, 72(3), 313-328. https://doi.org/10.2166/aqua.2023.217en_US
dc.identifier.urihttps://doi.org/10.2166/aqua.2023.217
dc.identifier.urihttp://hdl.handle.net/1828/15889
dc.language.isoenen_US
dc.publisherAQUA - Water, Infrastructure, Ecosystems and Societyen_US
dc.subjectbiocides
dc.subjectbiofilm prevention
dc.subjectbiofouling
dc.subjectdrinking water
dc.subjectpolyamide membranes
dc.subjectreverse osmosis
dc.subjectInstitute for Integrated Energy Systems (IESVic)
dc.subjectCentre for Advanced Materials and Related Technology (CAMTEC)
dc.subject.departmentDepartment of Civil Engineering
dc.subject.departmentDepartment of Mechanical Engineering
dc.subject.departmentDepartment of Chemistry
dc.titleEfficacy testing of non-oxidizing biocides for polyamide membrane biofouling prevention using a modified CDC biofilm reactoren_US
dc.typeArticleen_US

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