Bacterial Diversity in Biological Filtration Plant for the Removal of Iron and Manganese from Groundwater
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概要
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Bacterial diversity of the microbial consortia in a biological filtration plant for the elimination of iron (Fe) and manganese (Mn) from groundwater in Joyo City, Kyoto, Japan, was studied. PCR-based denaturing gradient gel electrophoresis (DGGE) analysis of bacterial 16S ribosomal RNA (rRNA) genes represented at least 15 signals, and nucleotide sequences of the dominant fragments showed similarities to <I>Gallionella</I> and <I>Nitrospira</I>. Phylogenetic analysis using the obtained nucleotide sequences of the 16S rRNA gene clone library showed the presence of the bacteria related to <I>Hyphomicrobium</I>, <I>Gallionella</I>, and <I>Sideroxydans</I>, which are supposed to be involved in Fe and Mn removal. In contrast, no 16S rRNA gene clone affiliated with the genus <I>Leptothrix</I>, which have been regarded as a major Fe- and Mn-oxidizer in biological filtration system, was observed. Though a large number of 16S rRNA gene clones closely related to <I>Nitrospira</I> was obtained, no clone showed high sequence similarity to known ammonium oxidizing bacteria (AOB). However, PCR-amplification of the ammonia monooxigenase gene (<I>amoA</I>) of AOB and ammonia oxidizing archaea (AOA) indicated the presence of both AOB and AOA in this biological filtration plant.
著者
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Takeda Minoru
Department Of Biochemistry Showa University Medical School
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Koizumi Jun-ichi
Department Of Biological And Chemical Engineering Faculty Of Engineering Gunma University
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KOIZUMI Jun-ichi
Department of Chemical and Energy Engineering, Graduate School of Engineering, Yokohama National University, Japan
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THAPA CHHETRI
Department of Chemical and Energy Engineering, Graduate School of Engineering, Yokohama National University, Japan
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SUZUKI Ichiro
Center for Risk Management and Safety Sciences, Yokohama National University, Japan
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TAKEZAKI Jun
Department of Chemical and Energy Engineering, Graduate School of Engineering, Yokohama National University, Japan
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TABUSA Hiromitsu
Department of Chemical and Energy Engineering, Graduate School of Engineering, Yokohama National University, Japan
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