Journal of Microbiology and Biotechnology
The Korean Society for Microbiology and Biotechnology publishes the Journal of Microbiology and Biotechnology.

2019 ; Vol.29-1: 91~104

AuthorYonkyu Choi, Yeongseop Cha, Bogsoon Kim
Place of dutySeoul Water Institute, 716-10, Cheonho-daero, Gwangjin-gu, Seoul 04981, Republic of Korea,Department of Agricultural Biotechnology, Seoul National University, Seoul 08826, Republic of Korea
TitleCharacteristics of Bacterial Communities in Biological Filters of Full-Scale Drinking Water Treatment Plants
PublicationInfo J. Microbiol. Biotechnol.2019 ; Vol.29-1
AbstractThe taxonomic and functional characteristics of bacterial communities in the pre-chlorinated rapid filters and ozonated biological activated carbon (BAC) filters were compared using Illumina MiSeq sequencing of the 16S rRNA gene and community-level physiological profiling (CLPP) based on sole-carbon-source utilization patterns. Both the rapid filters and BAC filters were dominated by Rhizobiales within α-proteobacteria, but other abundant orders and genera were significantly different in both types of filter. Firmicutes were abundant only in the intermediate chlorinated rapid filter, while Acidobacteria were abundant only in the BAC filters. Bacterial communities in the rapid filter showed high utilization of carbohydrates, while those in the BAC filters showed high utilization of polymers and carboxylic acids. These different characteristics of the bacterial communities could be related to the different substrates in the influents, filling materials, and residual disinfectants. Chlorination and ozonation inactivated the existing bacteria in the influent and formed different bacterial communities, which could be resistant to the oxidants and effectively utilize different substrates produced by the oxidant, including Phreatobacter in the rapid filters and Hyphomicrobium in the BAC filters. Bradyrhizobium and Leptothrix, which could utilize compounds adsorbed on the GAC, were abundant in the BAC filters. Ozonation increased taxonomic diversity but decreased functional diversity of the bacterial communities in the BAC filters. This study provides some new insights into the effects of oxidation processes and filling materials on the bacterial community structure in the biological filters of drinking water treatment plants.
Key_wordBacterial community, substrate utilization, rapid filter, biological activated carbon filter, biological filter, drinking water
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