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KMID : 0545120160260010099
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Journal of Microbiology and Biotechnology
2016 Volume.26 No. 1 p.99 ~ p.109
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Bacterial Community Structure Shifted by Geosmin in Granular Activated Carbon System of Water Treatment Plants
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Pham Ngoc Dung
Lee Eun-Hee
Chae Seon-Ha
Cho Yong-Deok
Shin Hye-Jin
Son Ah-Jeong
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Abstract
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We investigated the relation between the presence of geosmin in water and the bacterial community structure within the granular activated carbon (GAC) system of water treatment plants in South Korea. GAC samples were collected in May and August of 2014 at three water treatment plants (Sungnam, Koyang, and Yeoncho in Korea). Dissolved organic carbon and geosmin were analyzed before and after GAC treatment. Geosmin was found in raw water from Sungnam and Koyang water treatment plants but not in that from Yeoncho water treatment plant. Interestingly, but not surprisingly, the 16S rRNA clone library indicated that the bacterial communities from the Sungnam and Koyang GAC systems were closely related to geosmin-degrading bacteria. Based on the phylogenetic tree and multidimensional scaling plot, bacterial clones from GAC under the influence of geosmin were clustered with Variovorax paradoxus strain DB 9b and Comamonas sp. DB mg. In other words, the presence of geosmin in water might have inevitably contributed to the growth of geosmin degraders within the respective GAC system.
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KEYWORD
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cyanobacteria, geosmin, water quality, bacterial community, granular activated carbon, water treatment plant
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