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The Effects of Initial pH on VFAs Production of Mesophilic and Thermophilic Acidogenic Fermentation for Food Waste Recycling Wastewater
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 Title & Authors
The Effects of Initial pH on VFAs Production of Mesophilic and Thermophilic Acidogenic Fermentation for Food Waste Recycling Wastewater
Byun, Im-Gyu;
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 Abstract
Batch cultivations were performed to evaluate the influences of the initial pH condition on mesophilic and thermophilic acidogenic fermentation with food waste recycling wastewater. In both conditions of mesophilic and thermophilic fermentation, TVFAs production rates were maximized at the initial pH 7 condition as 0.15 and 0.23 g TVFAs/L hr, respectively. And pH was also maintained stably between 6 and 7 during 72hr acidogenic cultivation at both conditions. However, predominant VFA components were different according to reaction temperature conditions. In mesophilic condition, propionic acid which has low conversion efficiency to methane was accumulated up to 1,348 mg/L while acetic and butyric acid were predominant in thermophilic condition. Therefore, thermophilic acidogenic fermentation was superior for the effective VFAs production than mesophilic condition. From the DGGE analysis, the band patterns were different according to the initial pH conditions but the correlations of the each band were increased in similar pH conditions. These results mean that microbial communities were certainly affected by the initial pH condition. Consequently, the adjustment of the initial pH to neutral region and thermophilic operation are needed to enhance acidogenic fermentation of food waste recycling wastewater.
 Keywords
Food waste recycling wastewater;pH;Acidogenic fermentation;VFAs;
 Language
Korean
 Cited by
1.
혐기성 소화한 음폐수의 폐기물 매립지 주입을 위한 물리화학적 특성 및 전처리에 관한 연구,김형욱;윤석표;박흥석;

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선회식 가압부상 공정을 이용한 음폐수 처리시 순환수량 변화에 따른 유기물 제거 특성에 관한 연구,김진보;한영립;하미림;정병길;최영익;

한국환경기술학회지, 2014. vol.15. 6, pp.420-427
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응집제 및 응집보조제 투입방법에 따른 음식물폐수의 처리특성,성낙창;한영립;정병길;안영희;최영익;

한국환경기술학회지, 2014. vol.15. 4, pp.270-277
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