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RISS 인기검색어
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- 저자 : 안태영 ( Sang Hyun Min (검색결과 2 건)
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민상현,이옥재,안태영 ( Sang Hyun Min,Ok Jae Rhee,Tae Young Ahn ) 한국하천호수학회 1995 생태와 환경 Vol.28 No.4
Nitrification and denitrification potential were detected in the sediment of Lake Soyang by ^14C-bicarbonate incorporation and acetylene blockage method, respectively. The range of nitrification potential was 0.01∼2.49㎍-N gdwt^-1day^-1 and that of denitrification potential was 0.08∼5.25㎍-N gdwt^-1day^-1. Nitrification potential was showed the highest value at station 4 where organic carbon was rich. It was a high value at station 1 and 2 and was a low value with deep. Denitrification potential was showed the lowest value at station 1 in which organic carbon content was poor and water depth was shallow and was showed the highest value at station 4. Nitrification was correlated positively with NH_4^+-N and denitrification was correlated positively with organic carbon. The inorganic nitrogen reduction was comparatively superior to the inorganic nitrogen oxidation at all stations. So it was assumed to loss of nitrogen source from sediment.
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김근수,민병대,박수정,오정환,조익환,장석재,김지혜,박상민,박주현,정현미,안태영,정원화,Kim, Geun-Su,Min, Byung-Dae,Park, Su-Jeong,Oh, Jung-Hwan,Cho, Ik-Hwan,Jang, Seok-Jea,Kim, Ji-Hae,Park, Sang-Min,Park, Ju-Hyun,Chung, Hyen-Mi,Ahn, Tae-Yo The Microbiological Society of Korea 2013 미생물학회지 Vol.49 No.4
정수처리 시설에서 급 배수관으로 많이 사용되는 스테인리스관과 동관에 형성되는 생물막의 특성에 대해 16주 동안 조사하였다. 생물막 반응기는 실제 배급수관의 구조와 유사하게 설계하였으며, 정수처리장으로 유입되는 상수원수와 약품혼화 응집수, 침전수, 여과수, 처리수를 사용하였다. 평균 종속영양세균수는 $1.6{\times}10^4CFU/ml$, $5.8{\times}10^3CFU/ml$, $1.8{\times}10^3CFU/ml$, $1.3{\times}10^2CFU/ml$, 1 CFU/ml로 각 처리 과정을 거치면서 감소하였다. 스테인리스관과 동관에 형성된 생물막 세균수는 원수, 응집수, 침전수에서 2주만에 $2.9{\times}10^3CFU/cm^2$ 이상으로 증가하였고, 동관보다 스테인리스관에서 생물막 세균수가 높게 검출되었다. 여과수(평균 잔류염소 0.44 mg/L)에서는 두 관 재질에 따른 생물막 세균수의 명확한 차이는 없었으며, 5주 이후부터 두 관재질 모두 $18CFU/cm^2$ 이하의 생물막 세균이 검출되었다. 정수(평균 잔류염소 0.88 mg/L)에서는 두 관 재질 모두 생물막 세균이 검출되지 않았다. DGGE 분석결과, 원수, 응집수, 침전수에서 스테인리스관은 Sphingomonadaceae가 우점이였고, 동관에서는 Bradyrhizobiaceae와 함께 Sphingomonadaceae도 우점이였다. 여과수의경우, 5주차 이후 스테인리스관과 동관에 형성된 생물막에서 Propionibacterium sp., Sphingomonas sp., Escherichia sp. 등과 유사한 16S rRNA 유전자 서열을 가지는 밴드들이 검출되었다. 종 풍부도 및 다양성은 동관에 비해 스테인리스관이 더 높게 나타났다. Biofilm formed on stainless and copper in water treatment plant was investigated for sixteen weeks. Biofilm reactor was specially designed for this study. It was similar to that of a real distribution pipe. Raw water, coagulated, settled, filtered and treated water were used in this study. The average number of heterotrophic bacteria counts was $1.6{\times}10^4CFU/ml$, $5.8{\times}10^3CFU/ml$, $1.8{\times}10^3CFU/ml$, $1.3{\times}10^2CFU/ml$, 1 CFU/ml, respectively. Density of biofilm bacteria formed on stainless and copper pipes in raw, coagulated and settled water increased above $2.9{\times}10^3CFU/cm^2$ within second weeks while more biofilm bacteria counts were found on the stainless pipe than on the copper pipe. In case of filtered water (free residue chlorine 0.44 mg/L), there was no significant difference in the number of biofilm bacteria on both pipes and biofilm bacteria below $18CFU/cm^2$ were detected on both pipe materials after fifth weeks. Biofilm bacteria were not detected on both pipe materials in treated water (free residue chlorine 0.88 mg/L). According to the results of DGGE analysis, Sphingomonadacae was a dominant species of biofilm bacteria formed on the stainless pipe while the copper pipe had Bradyrhizobiaceae and Sphingomonadaceae as dominant bands. In case of filtered water, a few bands (similar to Propionibacterium sp., Sphingomonas sp., Escherichia sp., and etc.) that have 16S rRNA sequences were detected in biofilm bacteria formed on both pipes after fifth weeks. Stainless pipe had higher species richness and diversity than the copper pipe.
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