Effects of Environmental Factors on Degradation of Aroclors by Gram-negative Bacteria

Gram 음성세균에 의한 Aroclor 분해에 미치는 환경요소의 영향

  • 김치경 (충북대학교 자연과학대학 미생물학과) ;
  • 김문식 (충북대학교 자연과학대학 미생물학과)
  • Published : 1990.06.01


The effects of environmental factors on degradation of Aroclor 1242 were investigated with four Gram-negative bacterial isolates. Their biodegradabilities of the Aroclor were well correlated to their growth rates on the Aroclor added as a sole carbon and energy source. The optimum concentration of the Aroclor for biodegradation of the substrate in MM2 medium was 0.5mg/ml in HK-100, HK-123, and MS-1003 strains, but 1 mg/ml in DJ-26 strain. The optimum temperature and pH were $30^{\circ}C$ and 7.0, respectively, for all the strains. On the basis of the results which the strain of DJ-26 showed the highest degradability of the Aroclor as well as the highest growth rate under the optimum environmental conditions, the bacterial isolate identified as Pseudomonas sp. was found to be a strain usable for treatment of the toxic and recalcitrant chemical pollutants, such as polychlorinated aromatic hydrocarbons.


Biodegradation of Aroclors;Effects of environmental factros;Effects of environmental factros Gram-nggative bateria