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Identification of Bacteria Occurred Dominantly and Screening of Best VFAs Producing Bacteria in Food Waste Fermentation Process  

Kim, Tae-Ho (Office of Waterworks Seoul Metropolitan Government, Eunpyung water supply office)
Cho, Hee-Kyung (Department of Environmental Engineering, University of Seoul)
Song, Young-Hoon (Department of Environmental Engineering, University of Seoul)
Ahn, Seoung-Koo (Department of Environmental Engineering, University of Seoul)
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Abstract
We studied on screening and isolation of dominant bacteria in the food waste fermentation process and on effective production of VFAs by isolated bacteria. In the result of study, bacteria of twelve species were isolated by anaerobic medium. Among the 12 isolated species including Escherichia coli, Clostridium formicoaceticum, C. butyricum, C. acetobutyricum. E. coli and Clostridium spp. were occurred dominantly in the fermentation process and regarded as best VFAs producing bacteria. Acetic acid are produced 287 mg/gTS(8,176 mg/L) by E. coli in concentration of $6{\times}10^8\;cells/gTS$, 551 mg/gTS(15,715 mg/L) by Clostridium formicoaceticum in concentration of $5{\times}10^4\;cells/gTS$. Three times as much acetic acid were produced as blank. Butyric acid are produced 214 mg/gTS(6,106 mg/L) by C. butyricum in concentration of $2.5{\times}10^5\;cells/gTS$ and produced 254 mg/gTS(7,261 mg/L) by C. acetobutyricum of concentration of $1.5{\times}10^5\;cells/gTS$. Two times as much butyric acid were produced as blank.
Keywords
Food Wastes; Fermentation; VFA; Clostridium Formicoaceticum; Clostridium Butyricum;
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