상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제35권3호
  • /
  • Pages.227-235
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  • 2021
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  • 1225-7672(pISSN)
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  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
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초음파와 자외선(UV) 동시 적용이 가정용 가습기 내 살균에 미치는 시너지 효과에 대한 반응속도론적 연구

Kinetic examination on synergistic effect of co-use of ultrasonic wave and ultraviolet radiation on bacterial disinfection in a household humidifier

  • 김성아 (연세대학교 건설환경공학과) ;
  • 김지현 (연세대학교 건설환경공학과) ;
  • 이민주 (연세대학교 건설환경공학과) ;
  • 김자연 (연세대학교 건설환경공학과) ;
  • 정우식 (연세대학교 건설환경공학과) ;
  • 박준홍 (연세대학교 건설환경공학과)
  • Kim, Seunga (Department of Civil and Environmental Engineering, Yonsei University) ;
  • Kim, Jihyun (Department of Civil and Environmental Engineering, Yonsei University) ;
  • Lee, Minjoo (Department of Civil and Environmental Engineering, Yonsei University) ;
  • Kim, Jayun (Department of Civil and Environmental Engineering, Yonsei University) ;
  • Jung, Woosik (Department of Civil and Environmental Engineering, Yonsei University) ;
  • Park, Joonhong (Department of Civil and Environmental Engineering, Yonsei University)
  • 투고 : 2021.04.09
  • 심사 : 2021.06.15
  • 발행 : 2021.06.15
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초록

This study examined the effect of ultraviolet (UV) application on bacterial disinfection in a commercialized humidifier using ultrasonic wave (UW). To accurately examine disinfection kinetics in tap-water condition, tap-water was sterilized using a filter, and then inoculated with pure cultures of E. coli and P. putida with known viable counts. The disinfection kinetic characteristics were experimentally compared when UV alone, UW alone, and UW+UV together were applied in disinfecting the added bacteria in the commercialized humidifier. When UV alone was applied, bacterial disinfection kinetics followed a first-order decay reaction, and showed an approximately 10-time weaker disinfection compared to the typical UV disinfection in water treatment or wastewater treatment. When UW alone was applied, bacterial disinfection kinetics followed a second-order decay reaction with a low disinfection rate constant of 0.0002 min-1(CFU/mL)-1. When UV and UW were applied together, however and interestingly, the disinfection rate constant (0.0211 min-1(CFU/mL)-1) was approximately 100 times increased than that for the UW alone case. These results revealed that the co-use of UV and UW can provide synergistic effect on bacterial disinfection in a tap-water condition in household humidifiers.

키워드

과제정보

본 연구는 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업 (No. 2018R1A6A1A08025348)과 환경부의 재원으로 한국환경산업기술원의 상하수도혁신기술개발사업의 지원(2020002700003)을 받아 연구되었습니다.

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