2019 ; Vol.29-1: 91~104
|Author||Yonkyu Choi, Yeongseop Cha, Bogsoon Kim|
|Place of duty||Seoul 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|
|Title||Characteristics of Bacterial Communities in Biological Filters of Full-Scale Drinking Water Treatment Plants|
J. Microbiol. Biotechnol.2019 ;
|Abstract||The 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_word||Bacterial community, substrate utilization, rapid filter, biological activated carbon filter, biological filter, drinking water|
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