Food waste has developed as an alternative for the production of renewable fuels such as biogas from AD （anaerobic digestion）. In relation to the biogas production rate, digester temperature setting is one of the ve...Food waste has developed as an alternative for the production of renewable fuels such as biogas from AD （anaerobic digestion）. In relation to the biogas production rate, digester temperature setting is one of the very important factors for digester operation, especially in low temperature countries. In this study, the effect of digester temperature on biogas and methane production efficiency in the AD of food waste was evaluated. The two-stage anaerobic digestion has a total reactor volume of 60 L （acid reactor volume was 30 L and methane reactor volume was 30 L）. They were incubated at mesophilic and thermophilic conditions for 25 days to determine temperature profiles for the AD process. The results of the laboratory-scale experiment show that maximum biogas production occurred at 55 ℃ （38.14 L of biogas） for a period of 11 days when compared to other temperatures. Second best was at 50 ℃ （37.44 L of biogas） for a period of 12 days, followed by 40 ℃ （35.36 L of biogas） for a period of 15 days. Thermophilic temperatures will be used in further studies to examine scaling up of the process.展开更多
文摘Food waste has developed as an alternative for the production of renewable fuels such as biogas from AD （anaerobic digestion）. In relation to the biogas production rate, digester temperature setting is one of the very important factors for digester operation, especially in low temperature countries. In this study, the effect of digester temperature on biogas and methane production efficiency in the AD of food waste was evaluated. The two-stage anaerobic digestion has a total reactor volume of 60 L （acid reactor volume was 30 L and methane reactor volume was 30 L）. They were incubated at mesophilic and thermophilic conditions for 25 days to determine temperature profiles for the AD process. The results of the laboratory-scale experiment show that maximum biogas production occurred at 55 ℃ （38.14 L of biogas） for a period of 11 days when compared to other temperatures. Second best was at 50 ℃ （37.44 L of biogas） for a period of 12 days, followed by 40 ℃ （35.36 L of biogas） for a period of 15 days. Thermophilic temperatures will be used in further studies to examine scaling up of the process.
