대한환경공학회지 (Journal of Korean Society of Environmental Engineers)

  • 제29권8호
  • /
  • Pages.895-903
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  • 2007
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  • 1225-5025(pISSN)
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  • 2383-7810(eISSN)
대한환경공학회 (Korean Society of Environmental Engineers)
권호 표지

정량 PCR을 이용한 비위생 매립지의 특정 세균 및 효소 유전자와 수질인자와의 상관관계 평가

Comparative Assessment of Specific Genes of Bacteria and Enzyme over Water Quality Parameters by Quantitative PCR in Uncontrolled Landfill

  • 한지선 (인하대학교 환경공학과) ;
  • 성은혜 (인하대학교 환경공학과) ;
  • 박헌주 (인하대학교 환경공학과) ;
  • 김창균 (인하대학교 환경공학과)
  • Han, Ji-Sun (Department of Environmental Engineering, Inha University) ;
  • Sung, Eun-Hae (Department of Environmental Engineering, Inha University) ;
  • Park, Hun-Ju (Department of Environmental Engineering, Inha University) ;
  • Kim, Chang-Gyun (Department of Environmental Engineering, Inha University)
  • 발행 : 2007.08.31
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초록

매립지를 직접 생태학적으로 모니터링하는 방법을 개발하고자, 매립지 내의 생화학적 반응에 관여하는 세균들과 효소의 양을 정량함과 동시에 지하수 수질인자와 상호 연관성을 조사하여 생태학적 인자와의 연계 이용 가능성을 평가하였다. 이를 위하여 4개의 매립 종료된 비위생 매립지(천안(C), 원주(W), 논산(N), 평택(P) 매립지)에서 계절별로 지하수 시료를 채취하였으며 동시에 16S rDNA 방법을 사용하여 미생물 다양성을 분석하였다. 이를 기반으로, 매립지에서 주로 발견되는 세균과 효소를 대표하는 유전자를 정량하기 위한 특이 프라이머 쌍을 제작하였으며 상관계수에 기초하여 수질인자와 유전자 지표 인자간의 정량적 관련성을 비교하였다. 그 결과 DSR(황환원 세균) gene과 BOD(생화학적 산소요구량)사이의 상관관계는 0.8 이상인데 반해 NSR(질산화 세균-Nitrospira sp.) gene과 질산성 질소는 0.9 이상이었다. 안정화지표(BOD/COD)와 MTOT(메탄 산화 세균), MCR(Methyl coenzyme M reductase), Dde(Dechloromonas denitrificans) gene들은 0.8 이상의 상관관계를 가졌으나 3가 철과 Fli(Ferribacterium limineticm) gene은 0.7로 낮았다. MTOT gene의 경우, BOD/COD과의 관련성이 100%에 가깝게 높았다. 또한, 혐기성 유전자들(nirS-아질산 환훤효소, MCR, Dde, DSR)과 DO 역시 0.8 이상으로 나타나 일반적인 매립지 혐기성 반응들이 DO에 크게 의존함을 보였다. 결론적으로 분자생물학적 조사와 수질인자가 높은 상호연관성이 있었으며 real-time PCR이 전통적인 모니터링 인자들과 동시에 상호 보완적으로 모니터링에 사용됨으로써 매립지안정화 및 주변 영향을 평가하는데 효율적으로 사용 될 수 있음을 알 수 있었다.

As for the increasing demanding on the development of direct-ecological landfill monitoring methods, it is needed for critically defining the condition of landfills and their influence on the environment, quantifying the amount of enzymes and bacteria mainly concerned with biochemical reaction in the landfills. This study was thus conducted to understand the fates of contaminants in association with groundwater quality parameters. For the study, groundwater was seasonally sampled from four closed unsanitary landfills(i.e. Cheonan(C), Wonju(W), Nonsan(N), Pyeongtaek(P) sites) in which microbial diversity was simultaneously obtained by 16S rDNA methods. Subsequently, a number of primer sets were prepared for quantifying the specific gene of representative bacteria and the gene of encoding enzymes dominantly found in the landfills. The relationship between water quality parameters and gene quantification were compared based on correlation factors. Correlation between DSR(Sulfate reduction bacteria) gene and BOD(Biochemical Oxygen Demand) was greater than 0.8 while NSR(Nitrification bacteria-Nitrospira sp.) gene and nitrate were related more than 0.9. A stabilization indicator(BOD/COD) and MTOT(Methane Oxidation bacteria), MCR(Methyl coenzyme M reductase), Dde(Dechloromonas denitrificans) genes were correlated over 0.8, but ferric iron and Fli(Ferribacterium limineticm) gene were at the lowest of 0.7. For MTOT, it was at the highest related at 100% over BOD/COD. In addition, anaerobic genes(i.e., nirS-Nitrite reductase, MCR. Dde, DSR) and DO were also related more than 0.8, which showing anaerobic reactions generally dependant upon DO. As demonstrated in the study, molecular biological investigation and water quality parameters are highly co-linked, so that quantitative real-time PCR could be cooperatively used for assessing landfill stabilization in association with the conventional monitoring parameters.

키워드

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