Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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A Study on Microbial Community and Microbial Degradation of Diesel

디젤의 미생물 분해와 군집에 관한 연구

  • Choi, Hee-Chol (Department of Environmental Engineering, Kwangwoon University) ;
  • Cho, Yoon-A (Department of Environmental Engineering, Seoul National University of Technology) ;
  • Choi, Sang-Il (Department of Environmental Engineering, Kwangwoon University) ;
  • Lee, Tae-Jin (Department of Environmental Engineering, Seoul National University of Technology)
  • 최희철 (광운대학교 환경공학과) ;
  • 조윤아 (서울산업대학교 환경공학과) ;
  • 최상일 (광운대학교 환경공학과) ;
  • 이태진 (서울산업대학교 환경공학과)
  • Received : 2009.12.17
  • Accepted : 2010.05.27
  • Published : 2010.05.31
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Abstract

This study investigates characteristics of diesel degradation and variations of microbial community with the soil enrichment cultures. The cultures has yellow(YE-5) and transparent color's(WH-5) colony on solid plate medium. The bacillus type of YE-5 and WH-5 cultures showed diesel degradation at the rate of 99.07mg-Diesel/$L{\cdot}day$ and 57.82mg-Diesel/$L{\cdot}day$ in the presence of 1%(v/v) initial diesel concentration. Diesel degradation was 1.7 times faster than WH-5 culture. YE-5 or WH-5 culture could degrade a wide range of diesel compounds from $C_8$ to $C_24$. Microbial community analysis by PCR-DGGE technique shows that Psedomonas, Klebsiella, Escherichia and Stenotrophomonas as proteobacteria take role on the diesel degradation. uncultured Senotrophomonas sp. was only detected with YE-5 culture. It is concluded that proper combination of the microorganism should be present to stimulate the degradation of diesel and further studies are recommended for the effect of uncultured Senotrophomonas sp. or Escherichia hermannii on diesel degradation.

토양으로부터 농화배양된 두 미생물 군집의 디젤 분해 특성과 미생물의 군집 양상을 살펴보았다. 간균 형태를 띄는 두 군집은 육안으로 뚜렷히 구별되는 황색(YE-5)과 투명한 형태(WH-5)의 콜로니를 형성하였으며 1% 디젤 오염된 배지에서 26일간 배양하였을 때 디젤 분해율은 99.07 mg-Diesel/$L{\cdot}day$와 57.82 mg-Diesel/$L{\cdot}day$로 YE-5가 약 1.7배정도의 빠른 분해속도를 나타내었다. YE-5에 의한 디젤의 분해양상은 $C_8-C_{24}$ 전반에 걸쳐고르게 분해되는 양상을 보여주었다. PCR-DGGE 기법을 이용하여 YE-5를 동정한 결과 Psedomonas, Klebsiella, Escherichia, Stenotrophomonas 등이 관찰 되었으며 모두 단백세균에 속하는 것으로 분석 되었고 YE-5에서만 Uncultured Stenotrophomonas sp.가 관찰되었다. 본 실험을 통해 디젤의 효과적 분해를 위해 적절한 군집의 조합이 필요하다는 것을 알 수 있었으며 Escherichia hermannii나 Uncultured Stenotrophomonas sp.와 같은 기 보고되지 않은 종들이 디젤 분해에 미치는 영향에 관한 후속연구가 필요할 것으로 판단하였다.

Keywords

References

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