Drinking Water Engineering and Science www.drink-water-eng-sci.net 1996-9457 1996-9465 2 2 2009 10.5194/dwes-2-35-2009 http://www.drink-water-eng-sci.net/2/35/2009/ http://www.drink-water-eng-sci.net/2/35/2009/dwes-2-35-2009.html http://www.drink-water-eng-sci.net/2/35/2009/dwes-2-35-2009.pdf 35 39 2009-08-06 Technical Note: Community of bacteria attached on the PVDF MF membrane surface fouled from drinking water treatment, in Seoul, Korea K. Chon K. Chon J.-S. Chang H. Oh E. Lee J. Cho jwcho@gist.ac.kr NOM Lab., Department of Environmental Science and Engineering, Gwangju Institute of Science and Technology (GIST), 1 Oryong-dong, Buk-gu, Gwangju 500-712, Korea Department of Biological and Chemical Engineering, Yianbian University of Science and Technology (YUST), ChaoYang Street, Yianji, Jilin Province, 133-000, China Environmental Technology Research Team, DAEWOO E&C, 60 Songjuk-dong Jangan-gu Suwon city Gyeonggi-do, Korea Alpha, beta, and gamma proteobacteria comprise approximately 68, 16, and 7% of all identified bacteria. In this study, bacterial communities that had fouled polyvinylidene fluoride microfiltration membranes, which are used for drinking water treatment, over an 18 month period were analyzed using the 16s rRNA gene clone library method. The alpha, beta, and gamma proteobacteria were composed of mainly <i>Bradyrhizobium</i> and <i>Rhodopseudomonas</i>, <i>Ralstonia</i>, and <i>Legionella</i>, respectively. 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