• Title/Summary/Keyword: US-UV sequential process

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Inactivation of Mycobacterium using Ultrasonic and Ultraviolet Sequential Processes (초음파와 자외선 연계공정을 이용한 Mycobacterium 불활성화)

  • Kim, Wangi;Jung, Yeonjung;Yoon, Yeojoon;Lim, Gwanhun;Kim, Jongbae;Kang, Joon-Wun
    • Journal of Korean Society on Water Environment
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    • v.28 no.1
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    • pp.57-62
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    • 2012
  • 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.