Thermophilic Anaerobic Acid Fermentation of Food Wastes after NaOH Addition
Ahn, C.W.(Korea Naitonal Parks Authority, Pyungchang, Republic of Korea)E-mail:start-now@hanmail.net | Lee, C.S.;Seo, J.H.;Kim, S.S.(Dong-A University, Busan, Republic of Korea) | Park, J.S.;Moon, C.Y.(Kyungwoon University, Gumi, Republic of Korea) | Jang, S.H.(Miryang National University, Miryang, Republic of Korea)
This study showed that thermophilic anaerobic acid fermentation of food wastes had an enhanced hydrolysis capability and improvement of acidification efficiency. Influence of pH on the anaerobic hydrolysis and acidogenesis was investigated to determine the proper alkalinity in the thermophilic fermentation of food wastes. The results of putting NaOH as alkali to evaluate hydrolysis and acid fermentation efficiency in acid fermentation process of food wastes showed that the food wastes pretreated with 0.05 g NaOH/g TS had the maximum 12,600 mg/L of VFAs concentration during HRT 3 days in 55℃ thermophilic condition and the maximum 9,700 mg/L of VFAs concentration during HRT 5 days in 35℃ mesophilic condition.
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