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Antibacterial Effect of Fermented Rice Water against Food-borne Bacteria in Kitchen Towel  

Ha, Ji-Hyoung (Department of Food Science and Technology, Chung-Ang University)
Lee, Yu-Si (Department of Food Science and Technology, Chung-Ang University)
Lee, Seok-Joo (Department of Food Science and Technology, Chung-Ang University)
Hwang, Sun-Soon (Korea Food & Drug Administration)
Ha, Sang-Do (Department of Food Science and Technology, Chung-Ang University)
Publication Information
Journal of Food Hygiene and Safety / v.22, no.4, 2007 , pp. 365-369 More about this Journal
Abstract
This study was conducted to seek optimum concentration and treatment time of fermented rice water (Rizen) to disinfect food-borne bacteria in kitchen towel. $2.65\;log_{10}cfu/g$ of E. coli was reduced when double or triple diluted fermented rice water was treated during 2 hours. In case of concentrated fermented rice water, crude and double diluted solutions showed complete sterilization after 2 and 5 hours, respectively. On the other hand, triple, quadruple, quintuple diluted solutions needed 24 hours for complete sterilization. The effect of fermented rice water as a disinfectant was compared with water, detergent and chlorine treatment against E. coli and S. Typhimurium contaminated in kitchen towel. The initial number of E. coli in untreated kitchen towel were $5.0\;log_{10}cfu/g$ and were decreased to 4.32, 3.70 and 3.02 by treatments of water, detergent and chlorine, respectively. The double and triple diluted fermented rice water and double diluted concentrated fermented rice water also reduced the E. coli in kitchen towel to 2.43, 2.30 and $1.88\;log_{10}cfu/g$, respectively. The initial number of S. Typhimurium in untreated kitchen towel were $4.80\;log_{10}cfu/g$ and were decreased to 4.12, 3.58 and 2.81 by treatments of water, detergent and chlorine, respectively. The double and triple diluted fermented rice water and double diluted concentrated fermented rice water also reduced the E. coli in kitchen towel to 2.14, 2.03 and $1.59\;log_{10}cfu/g$, respectively. Consequently, the fermented rice water is thought to be a good disinfectant to reduce food-borne bacteria like E. coli and Salmonella contaminated in kitchen towel.
Keywords
E. coli; Salmonella Typhimurium; fermented rice water; Disinfectants; Kitchen towel;
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Times Cited By KSCI : 4  (Citation Analysis)
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