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dc.contributor.authorScarascia, Giantommaso
dc.contributor.authorFortunato, Luca
dc.contributor.authorMyshkevych, Yevhen
dc.contributor.authorCheng, Hong
dc.contributor.authorLeiknes, TorOve
dc.contributor.authorHong, Pei-Ying
dc.identifier.citationScarascia, G., Fortunato, L., Myshkevych, Y., Cheng, H., Leiknes, T., & Hong, P.-Y. (2020). UV and bacteriophages as a chemical-free approach for cleaning membranes from anaerobic bioreactors. doi:10.1101/2020.08.03.234450
dc.description.abstractABSTRACTAnaerobic membrane bioreactor (AnMBR) for wastewater treatment has attracted much interest due to its efficacy in providing high quality effluent with minimal energy costs. However, membrane biofouling represents the main bottleneck for AnMBR because it diminishes flux and necessitates frequent replacement of membranes. In this study, we assessed the feasibility of combining bacteriophages and UV-C irradiation to provide a chemical-free approach to remove biofoulants on the membrane. The combination of bacteriophage and UV-C resulted in better log cells removal and twice higher extracellular polymeric substance (EPS) concentration reduction in mature biofoulants compared to UV-C. A reduction in the relative abundance of Acinetobacter spp. and selected gram-positive bacteria associated with the membrane biofilm was also achieved by the new cleaning approach. Microscopic analysis further revealed the formation of cavities in the biofilm due to bacteriophages and UV-C irradiation, which would be beneficial to maintain water flux through the membrane. When the combined treatment was further compared with the common chemical cleaning procedure, a similar reduction on the cell numbers was observed (1.4 log). However, combined treatment was less effective in removing EPS compared with chemical cleaning. These results suggest that the combination of UV-C and bacteriophage have an additive effect in biofouling reduction, representing a potential chemical-free method to remove reversible biofoulants on membrane fitted in an anaerobic membrane bioreactor.SIGNIFICANCEAnaerobic membrane bioreactors can achieve high quality effluent with a reduced energy consumption. However, biofouling represents the main bottleneck for membrane filtration efficiency. Biofouling is commonly reduced through chemical treatment. These agents are often detrimental for the environment and health safety due to the formation of toxic byproducts. Therefore, we present a new approach, based on the additive antifouling action of bacteriophages infection and UV-C irradiation, to reduce anaerobic membrane biofouling. This new strategy could potentially delay the occurrence of membrane fouling by removing the reversible fouling layers on membranes, in turn reducing the frequencies and amount of chemicals needed throughout the course of wastewater treatment.
dc.publisherCold Spring Harbor Laboratory
dc.rightsArchived with thanks to Cold Spring Harbor Laboratory
dc.subjectAnaerobic processes
dc.titleUV and bacteriophages as a chemical-free approach for cleaning membranes from anaerobic bioreactors
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentBiological and Environmental Sciences and Engineering (BESE) Division
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)
dc.contributor.departmentEnvironmental Science and Engineering
kaust.personScarascia, Giantommaso
kaust.personFortunato, Luca
kaust.personMyshkevych, Yevhen
kaust.personCheng, Hong
kaust.personLeiknes, TorOve
kaust.personHong, Pei-Ying

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Archived with thanks to Cold Spring Harbor Laboratory
Except where otherwise noted, this item's license is described as Archived with thanks to Cold Spring Harbor Laboratory