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http://dx.doi.org/10.17137/korrae.2021.29.4.77

A study on the introduction of organic waste-to-energy incentive system(II): material and energy balance of biogasification  

Moon, Hee-Sung (Waste-to-Energy Research Division, National Institute of Environmental Research)
Kwon, Jun-Hwa (Waste-to-Energy Research Division, National Institute of Environmental Research)
Lee, Won-Seok (Waste-to-Energy Research Division, National Institute of Environmental Research)
Lee, Dong-Jin (Waste-to-Energy Research Division, National Institute of Environmental Research)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.29, no.4, 2021 , pp. 77-86 More about this Journal
Abstract
In this study, to use as basic data for the organic waste resource energy incentive system, the energy efficiency is evaluated through the mass balance and energy balance calculation results of the anaerobic digester where food waste, food waste leachate and various organic wastes are treated. As a result of the mass balance analysis for 11 biogasification facilities, it was confirmed that 21.1% of process water and 25.7% of tap water were input in large amounts, excluding organic waste. Accordingly, it accounted for 87.6% of the total effluent of linked treated water. In addition, considering that 15.7% of the total input volume is converted to biogas and the average total solids (TS) is 22%, an average material conversion rate of 75% was confirmed. As a result of the energy balance analysis, the energy conversion rate was confirmed to be 78.5% on average by analyzing the biogas calorific value compared to the potential energy of the influent. The average biogas production efficiency including external energy sources for biogas production was 69.4%, and the biogas plant efficiency to which unused effluent energy was applied was 58.9% on average.
Keywords
Anaerobic digestion; Biogas; Food waste; Material balance; Energy balance; Incentive system;
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