Crude Oil-degrading Properties of Psychrotrophic Bacterium Acinetobacter calcoaceticus A1-1

저온성 세균 Acinetobacter calcoaceticus A1-1의 원유분해 특성

  • 윤희정 (숙명여자대학교 생물학과) ;
  • 김상진 (한국해양연구소해양미생물연구실) ;
  • 민경희 (숙명여자대학교 생물학과)
  • Published : 1993.02.01

Abstract

To investigate the oil degrading properties of psychrotrophic bacterium Acinetobacter calcoaceticus Al-l the effects of environmental factors on this bacterium were studied. The optimal environmental conditions for cell growth rate and oil-emulsifying activity were as follows; temperature $15^{\circ}C$, pH 7.5, salt concentration 0- 3% and crude oil concentration 0.1%. Additionally the optimal concentration of Nand P source for cell growth rate and oil-emulsifying activity were 0.76 mM and 0.057 mM as $(NH_4)HS0_4$ and $K_2HP0_4$, respectively. Analysis of remnant oil by gas chromatography showed time dependent oil degradation pattern by A. calcoaceticus during cultivation; At lOoe and $15^{circ}$e, most alkane peaks were disappeared and it showed large quantities of crude oil were degraded. But at $25^{circ}$e alkane compounds in the crude oil were partially degraded even after 120 hours incubation.

저온성 세균 Acinetobacter calcoaceticus A1-1의 유류분해 특성을 연구하기 위해 환경적 요인에 대한 영향을 살펴보았다. 이 세균의 성장율과 유화활성도에 대한 적정 환경조건은 온도 $15^{\circ}C$, pH 7.5, 염분도 0-3, 원유농도 0.1로 나타났고 질소원과 인원의 적정농도는$(NH_4)_2S0_4$$K_2HP0_4$, 형태로 각각 0.76 mM, 0.057mM이다. 온도에 따른 A.calcoaceticus A1-1의 유류분해 양상을 개스크로마토그라피로 분석한 결과 $10^{\circ}C$, $15^{\circ}C$에서 대부분의 탄화수소 피크가 감소되어 상당 정도의 유류분해를 관찰 할 수 있었다. 반면 $25^{\circ}C$의 경우에는 120시간 배양한 후에도 원유에 포함된 포화탄화수소 화합물들이 부분적으로만 분해되었다.

Keywords

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