한국물환경학회지 (Journal of Korean Society on Water Environment)

  • 제22권4호
  • /
  • Pages.672-677
  • /
  • 2006
  • /
  • 2289-0971(pISSN)
  • /
  • 2289-098X(eISSN)
한국물환경학회 (Korean Society on Water Environment)
권호 표지

Bacillus Subtilis Spores 불활성화 실험을 통한 오존, UV 공정의 소독 특성 평가

Evaluation of Disinfection Characteristics of Ozone, UV Processes for Bacillus Subtilis Spores Inactivation

  • Jung, Yeon Jung (Department of Environmental Engineering, Yonsei University, YIEST) ;
  • Oh, Byung Soo (Department of Environmental Engineering, Yonsei University, YIEST) ;
  • Kang, Joon-Wun (Department of Environmental Engineering, Yonsei University, YIEST)
  • 투고 : 2006.04.25
  • 심사 : 2006.06.13
  • 발행 : 2006.07.30
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초록

Ozone/UV combined process is an effective technique to enhance generation of OH radical which is non-selective and powerful oxidant. The objective of this study is to evaluate the inactivation rates of B. subtilis spores by three candidate processes (ozone alone, UV alone, ozone/UV combined processes) at 4 and $20^{\circ}$ and to investigate the effects of OH radical on inactivation of B. subtilis spores. On the UV alone process, required UV dosages for lag phase and 3-log inactivation of B. subtilis spores were determined as $8.9mJ/cm^2$ and $47mJ/cm^2$. However, the inactivation of B. subtilis spores didn't occured beyond 4.5-log inactivation despite increasing UV dose. The inactivation of B. subtilis spores by ozone alone and ozone/UV combined process was investigated with ozone CT (Concentration of disinfectant ${\times}$ Contact time) concept. As a result, inactivation of B. subtilis spores by ozone/UV combined process was faster than by ozone alone, and especially $CT_{lag}$ value B. subtilis spores in the presence and absence of t-BuOH, OH radical scavenger, was investigated to evaluate effects of OH radical formed during ozone/UV combined process. We found that OH radical plays important roles on inactivation of B. subtilis spores.

키워드

과제정보

연구 과제 주관 기관 : 한국과학재단

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