Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Inactivation of Mycobacterium using Ultrasonic and Ultraviolet Sequential Processes

초음파와 자외선 연계공정을 이용한 Mycobacterium 불활성화

  • Kim, Wangi (The Office of Waterworks Seoul Metropolitan Goverment) ;
  • Jung, Yeonjung (Department of Environmental Engineering, YIEST, Yonsei University) ;
  • Yoon, Yeojoon (Department of Environmental Engineering, YIEST, Yonsei University) ;
  • Lim, Gwanhun (Department of Biomedical Laboratory Science, Yonsei University) ;
  • Kim, Jongbae (Department of Biomedical Laboratory Science, Yonsei University) ;
  • Kang, Joon-Wun (Department of Environmental Engineering, YIEST, Yonsei University)
  • 김완기 (서울시 상수도사업본부) ;
  • 정연정 (연세대학교 환경공학부) ;
  • 윤여준 (연세대학교 환경공학부) ;
  • 임관훈 (연세대학교 임상병리학과) ;
  • 김종배 (연세대학교 임상병리학과) ;
  • 강준원 (연세대학교 환경공학부)
  • Published : 2012.01.30
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Abstract

In this study, the inactivation efficiency of Mycobacterium marinum was evaluated in buffered water (pH 7) using a low pressure ultraviolet (LP-UV) lamp, ultrasonic (US), and UV/US sequential processes. In the UV alone process, 3 log inactivation of the M. marinum was achieved with a UV dose of $120mJ/cm^2$. However, a tailing phase was later observed because M. marinum has a high tendency for cell aggregation. Even though the M. marinum was not inactivated in the US alone process, the hydrophobicity decreased and turbidity increased due to the crumbling of the cell aggregation. Among the candidate processes which were UV alone, US-UV sequential process and UV-US-UV sequential process, the US-UV sequential process showed the highest synergistic effects for M. marinum inactivation. Consequently, US is a very useful process as a UV irradiation pre-treatment to inactivate M. marinum in water.

Keywords

References

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