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학술저널
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한국미생물생명공학회 Journal of Microbiology and Biotechnology Journal of Microbiology and Biotechnology 제18권 제8호
발행연도
2008.1
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1,459 - 1,469 (11page)

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이 논문의 연구 히스토리 (3)

2008

Microbial Structure and Community of RBC Biofilm Removing Nitrate and Phosphorus from Domestic Wastewater
이한웅 ,  최의소 ,  윤주환 외 1명 Journal of Microbiology and Biotechnology 2008.01 학술저널

1998

The Microbial Community Analysis in a Nitrogen Removing Bioreactor: Conventional and Fluorescence In Situ Hybridization (FISH) Monitoring of Proteobacteria and Nitrate Reducing bacteria in Activated Sludge
이한웅 ,  홍성갑 ,  박용근 한국동물학회 학술대회 1998.01 학술대회자료

1997

The Characterization and Isolation of Nitrate Reducing Bacteria and Denitrifying Bacteria Isolated from Activated Sludge in Plant
이한웅 ,  유경만 ,  이호정 외 1명 한국동물학회 학술대회 1997.01 학술대회자료

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Using a rotating biological contactor modified with a sequencing bath reactor system (SBRBC) designed and operated to remove phosphate and nitrogen [58], the microbial community structure of the biofilm from the SBRBC system was characterized based on the extracellular polymeric substance (EPS) constituents, electron microscopy, and molecular techniques. Protein and carbohydrate were identified as the major EPS constituents at three different biofilm thicknesses, where the amount of EPS and bacterial cell number were highest in the initial thickness of 0-100 μm. However, the percent of carbohydrate in the total amount of EPS decreased by about 11.23%, whereas the percent of protein increased by about 11.15% as the biofilm grew. Thus, an abundant quantity of EPS and cell mass, as well as a specific quality of EPS were apparently needed to attach to the substratum in the first step of the biofilm growth. A FISH analysis revealed that the dominant phylogenetic group was β- and γ-Proteobacteria, where a significant subclass of Proteobacteria for removing phosphate and/or nitrate was found within a biofilm thickness of 0-250 μm. In addition, 16S rDNA clone libraries revealed that Klebsiella sp. and Citrobacter sp. were most dominant within the initial biofilm thickness of 0-250 μm, whereas sulfur-oxidizing bacteria, such as Beggiatoa sp. and Thiothrix sp., were detected in a biofilm thickness over 250 μm. The results of the bacterial community structure analysis using molecular techniques agreed with the results of the morphological structure based on scanning electron microscopy. Therefore, the overall results indicated that coliform bacteria participated in the nitrate and phosphorus removal when using the SBRBC system. Moreover, the structure of the biofilm was also found to be related to the EPS constituents, as well as the nitrogen and phosphate removal efficiency. Consequently, since this is the first identification of the bacterial community and structure of the biofilm from an RBC simultaneously removing nitrogen and phosphate from domestic wastewater, and it is hoped that the present results may provide a foundation for understanding nitrate and phosphate removal by an RBC system.
#Biofilm #rotating biological contactor #FISH #16S rDNA #bacterial community

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참고문헌 신청
[학술지(정기간행 google schola APHA / 1995 / Standard Methods for Examination of Water and Wastewater / Public Health Association google schola Ahmad, A. / 1999 / Phylogenetic affinity of a wide, vacuolate, nitrate-accumulating Beggiatoa sp. from Monterey Canyon, California, with Thioploca spp. Appl. Environ / Microb google schola Amann, R. I. / 1990 / Fluorescentoligonucleotide probing of whole cells for determinative, phylogenetic, and environmental studies in microbiology / Bacteriol 172 : 762 ~ 770 google schola Bond, P. L. / 1995 / Bacterial community structures of phosphate removing and nonphosphate- removing activated sludges from sequencing batch reactors. Appl. Environ / Microbi google schola

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