Antibiofilm effect enhanced by modification of 1,2,3-triazole and palladium nanoparticles on polysulfone membranes
Villalobos, Luis Francisco
Nunes, Suzana Pereira
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Environmental Science and Engineering Program
Physical Sciences and Engineering (PSE) Division
Chemical and Biological Engineering Program
Advanced Membranes and Porous Materials Research Center
Water Desalination and Reuse Research Center (WDRC)
Water Desalination & Reuse Research Cntr
Advanced Membranes and Porous Materials Center (AMPMC)
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AbstractBiofouling impedes the performance of membrane bioreactors. In this study, we investigated the antifouling effects of polysulfone membranes that were modified by 1,2,3-triazole and palladium (Pd) nanoparticles. The modified membranes were evaluated for antibacterial and antifouling efficacy in a monoculture species biofilm (i.e., drip flow biofilm reactor, DFR) and mixed species biofilm experiment (i.e., aerobic membrane reactor, AeMBR). 1,2,3-triazole and Pd nanoparticles inhibited growth of Pseudomonas aeruginosa in both aerobic and anaerobic conditions. The decrease in bacterial growth was observed along with a decrease in the amount of total polysaccharide within the monoculture species biofilm matrix. When the modified membranes were connected to AeMBR, the increase in transmembrane pressure was lower than that of the non-modified membranes. This was accompanied by a decrease in protein and polysaccharide concentrations within the mixed species biofilm matrix. Biomass amount in the biofilm layer was also lower in the presence of modified membranes, and there was no detrimental effect on the performance of the reactor as evaluated from the nutrient removal rates. 16S rRNA analysis further attributed the delay in membrane fouling to the decrease in relative abundance of selected bacterial groups. These observations collectively point to a lower fouling occurrence achieved by the modified membranes.
CitationAntibiofilm effect enhanced by modification of 1,2,3-triazole and palladium nanoparticles on polysulfone membranes 2016, 6:24289 Scientific Reports
SponsorsThe authors would like to thank Moustapha Harb and Dr. Yanghui Xiong for technical assistance and guidance. The authors express their sincerest appreciation to Dr. Manuel A. Roldan of the KAUST Imaging and Characterization core lab for providing technical assistance in acquiring the STEM-EDX images. This study is supported by KAUST CCF funding FCC/1/1971-06-01 awarded to P.-Y. Hong.
PublisherNature Publishing Group
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