Microbiology and Biotechnology Letters (한국미생물·생명공학회지)

The Korean Society for Microbiology and Biotechnology (한국미생물·생명공학회)
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Degradation of Phthalic Acid Isomers by Terephthalic Acid Degrading Bacteria Isolated from Kyonggi Area

경기도에서 분리된 terephthalic acid 분해균의 phthalic acid 이성질체 분해

  • 이종훈 (경기대학교 식품생물공학과) ;
  • 이유진 (경기대학교 식품생물공학과)
  • Published : 2001.06.01
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Abstract

Eleven bacterial strains which were able to utilize terephthalic acid as a carbon and an energy source for growth were isolated from the soil of 7 water quality evaluation points in Kyonggi area of Korea. According to the report from the authorities, biochemical oxygen demands of the water at 4 points were reported over 20 ppm but those of 3 points were repOlted less than 2 ppm in 1997. Optimum temperatures of growth and terephthalic acid degrading activity of some isolates were not identical but optimum growth temperature was 30$^{\circ}$C. Most of the isolates utilized one or two of the phthalate isomers as a carbon source for growth and the isolates from the 4 contaminated points showed higher terephthalic acid degrading activity than those from the 3 clean points.

공업지역이 밀집한 수도권을 포함하고 있는 경기도의 하천을 대상으로 생화학적 산소요구량이 20ppm 이상으로 오염도가 높은 하천 4개 지역과 2ppm 이하로 비교적 청정한 3개 지역의 토양에서 terephthalic acid를 탄소원으로 생육하는 11개 균주를 분리하였다. 이들 균주들 중, 최적 생장온도와 최대 분해활성을 나타내는 온도가 일치하지 않는 균주도 존재하였지만 대부분은 $30^{\circ}C$에서 최적 생장을 나타냈다. Phthalic acid 이성질체를 탄소원으로한 고체배지에서의 생장과 액체배지에서의 이성질체 분해능력을 비교한 결과, 분리균들은 대체로 한 개 또는 두 개의 phthalic acid 이성질체를 이용하여 생장하는 것으로 나타났고, 오염도가 높은 지역에서 분리된 균들의 phthalic acid 이성질체 분해활성이 오염도가 낮은 지역에서 분리된 균들에 비해 높은 것으로 나타났다.

Keywords

References

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