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Effects of Pretreatment Time and pH low set value on Continuous Mesophilic Hydrogen Fermentation of Food Waste  

Kim, Sang-Hyoun (대구대학교 환경공학과)
Lee, Chae-Young (수원대학교 토목공학과)
Publication Information
Journal of Korean Society of Water and Wastewater / v.25, no.3, 2011 , pp. 343-348 More about this Journal
Abstract
Since 2005, food waste has been separately collected and recycled to animal feed or aerobic compost in South Korea. However, the conventional recycling methods discharge process wastewater, which contain pollutant equivalent to more than 50% of food waste. Therefore, anaerobic digestion is considered as an alternative recycling method of food waste to reduce pollutant and recover renewable energy. Recent studies showed that hydrogen can be produced at acidogenic stage in two-stage anaerobic digestion. In this study, the authors investigated the effects of pretreatment time and pH low set value on continuous mesophilic hydrogen fermentation of food waste. Food waste was successfully converted to $H_2$ when heat-treated at $70^{\circ}C$ for 60 min, which was milder than previous studies using pH 12 for 1 day or $90^{\circ}C$. Organic acid production dropped operational pH below 5.0 and caused a metabolic shift from $H_2/butyrate$ fermentation to lactate fermentation. Therefore, alkaline addition for operational pH at or over 5.0 was necessary. At pH 5.3, the result showed that the maximum hydrogen productivity and yield of 1.32 $m^3/m^3$.d and 0.71 mol/mol $carbohydrate_{added}$. Hydrogen production from food waste would be an effective technology for resource recovery as well as waste treatment.
Keywords
food waste; heat treatment; hydrogen fermentation; pH;
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1 이채영, 박인근 (2010) 음식폐기물의 생물학적수소 발효시 열처리 효과, 유기물자원화, 18(1), pp. 81-88.
2 환경부 (2007) 음식물류 폐기물 처리시설 발생폐수육상처리 및 에너지화 종합대책(2008-2012).
3 APHA/AWWA/WEF (1998) Standard methods for the examination of Water and Wastewater, 20th ed., Washington, D.C., USA.
4 Han, S.-K. and Shin, H.-S. (2002) Enhanced acidogenic fermentation of food waste in a continuous-flow reactor, Waste Manage. Res., 20, pp. 110-118.   DOI   ScienceOn
5 Hawkes, F. R., Dinsdale, R., Hawkes, D. L. and Hussy, I. (2002) Sustainable fermentative hydrogen production: challenges for process optimization, Int. J. hydrogen energy, 27, pp. 1339-1347.   DOI   ScienceOn
6 Kim, S.-H. and Shin, H.-S. (2008) Effects of base-pretreatment on continuous enriched culture for hydrogen production from food waste, Int. J. Hydrogen Energy, 33, pp. 5266-5274.   DOI   ScienceOn
7 Kim, D.-H., Kim, S.-H., Koh, I.-B. and Shin, H.-S. (2008)Start-up strategy for continuous fermentative hydrogen production: Early switchover from batch to continuous operation, Int. J. Hydrogen Energy, 33, pp. 1532-1541.   DOI   ScienceOn
8 Kim, D.-H., Kim, S.-H., and Shin, H.-S. (2009) Hydrogen fermentation of food waste without inoculum addition. Enzyme Microb. Tech., 45(3), pp. 181-187.   DOI   ScienceOn
9 Noite, T., Takabatake, H., Mizuno, O. and Ohba, M. (2002) Inhibition of hydrogen fermentation of organic wastes by lactic acid bacteria. Int. J. Hydrogen Energy, 27, pp. 367-1371.