Cho, Kyungjin Jeong, Dawoon Lee, Seockheon Bae, Hyokwan 2024-01-19T22:03:50Z 2024-01-19T22:03:50Z 2021-09-03 2018-08 0175-7598 https://pubs.kist.re.kr/handle/201004/121093 The effect of chlorine disinfection on marine biofilm populations and communities formed on membrane surfaces was investigated under two feedwater conditions: raw seawater and deep bed filtration-treated seawater. As a result of chlorination, the structure of the biofilm community on the microfiltration/ultrafiltration and reverse osmosis membrane coupons shifted significantly at the genus level. However, the total bacterial population was not reduced under the two feedwater conditions. This failure to control the biofilm was attributed to the adaptation and survival of selected bacteria under chlorine stress. Phaeobacter caeruleus, isolated from the biofilm, was examined as a representative chlorine-resistant biofilm-forming bacterium. The number of viable P. caeruleus was significantly reduced (as much as 99.8%) after ultraviolet (UV) disinfection. The results indicated that additional disinfection by UV irradiation can inactivate chlorine-resistant bacteria. Therefore, tandem chlorination-UV disinfection may enhance the efficiency of biofouling control in seawater reverse osmosis processes. The synergistic effects of tandem chlorination-UV irradiation on the marine biofilm community should be investigated in future studies. English Springer Verlag Chlorination caused a shift in marine biofilm niches on microfiltration/ultrafiltration and reverse osmosis membranes and UV irradiation effectively inactivated a chlorine-resistant bacterium Article 10.1007/s00253-018-9111-5 1 Applied Microbiology and Biotechnology, v.102, no.16, pp.7183 - 7194 Applied Microbiology and Biotechnology 102 16 7183 7194 N scie scopus 000440109200035 2-s2.0-85048480047 Biotechnology & Applied Microbiology Biotechnology & Applied Microbiology Article WATER DISTRIBUTION-SYSTEM MICROBIAL COMMUNITY STRUCTURE SCALE DESALINATION PLANT DRINKING-WATER SEAWATER DESALINATION ANTIBIOTIC-RESISTANCE ESCHERICHIA-COLI RED-SEA SP NOV. PRETREATMENT Seawater reverse osmosis Biofouling Chlorination UV disinfection Biofilm forming bacteria Phaeobacter caeruleus