Food Science and Biotechnology

  • 제17권6호
  • /
  • Pages.1345-1348
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  • 2008
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  • 1226-7708(pISSN)
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  • 2092-6456(eISSN)
한국식품과학회 (Korean Society of Food Science and Technology)
권호 표지

Antibacterial Effect of $TiO_2$ Photocatalytic Reactor against Food-borne Pathogens

  • Kim, Byung-Hoon (Department of Dental Materials, 2nd Stage of Brain Korea 21, College of Dentistry, Chosun University) ;
  • Cho, Dong-Lyun (Faculty of Applied Chemistry, 2nd Stage of Brain Korea 21, Chonnam National University) ;
  • Ohk, Seung-Ho (Department of Oral Microbiology, 2nd Stage of Brain Korea 21 for School of Dentistry, Chonnam National University) ;
  • Ko, Yeong-Mu (Department of Dental Materials, 2nd Stage of Brain Korea 21, College of Dentistry, Chosun University)
  • 발행 : 2008.12.31
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초록

Titanium dioxide ($TiO_2$) shows antibacterial effects when exposed to near ultra violet (UV) light. In this study, $TiO_2$ photocatalytic continuous reactor was designed and applied to food-borne pathogens such as Vibrio parahaemolyticus ATCC 17802, Salmonella choleraesuis ATCC 14028, and Listeria monocytogenes ATCC 15313. $TiO_2$ films were prepared by conventional sol-gel dip-coating method using titanium tetra iso-propoxide (TTIP). The antibacterial activity of photocatalytic reactor with various flow rates and UV-A illumination time showed effective bactericidal activity. As the UV-A illumination time increased, survival rates of those bacteria decreased. After 60 min of UV-A illumination, the survival rates of V. parahaemolyticus and S. choleraesuis were less than 0.1%. However, that of L. monocytogenes was about 5% at that time point. These results present an effective way to exclude pathogenic bacteria from aqueous foods.

키워드

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