Simwon Kang  Younghee Kim

Vol. 30,  No. 4, pp. 387-393, Dec.  2024
10.7464/ksct.2024.30.4.387

Organic waste resources Integrated biogasification facility Greenhouse gas reduction

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The Act to Promote the Production and Utilization of Biogas from Organic Waste Resources, which has been in effect since 2024, recommends integrated anaerobic digestion. However, the methane gas production of individual organic waste resources is calculated by simply summing them together. This does not give sufficient consideration to the various synergistic effects that occur during the actual integrated anaerobic digestion process. This study aims to analyze the methane produced by the synergistic effects of integrated anaerobic digestion of organic waste materials and evaluate the greenhouse gas reduction effect. The BMP (Biochemical Methane Potential) test of sewage residue and food waste at 35 oC for 20 days showed that the methane generation rate was 0.320 m3 CH4 kgVSin–1 and 0.674 m3 CH4 kgVSin–1, respectively, with an average of 0.497 m3 CH4 kgVSin–1. The methane generation rate for 200 days of continuous experimentation with a 5:5 mixing ratio was 0. The methane generation rate increased by 29% to 0.643 m3 CH4 kgVSin–1, showing the synergistic effect of integrated anaerobic digestion. Furthermore, the methane gas generation during anaerobic digestion was predicted to be 340 million N m3yr–1 (as of 2021) by deriving a model based on the influent VS and calculating the methane gas generation amount during anaerobic digestion. This value was 19% higher than the methane gas generation amount for individual organic waste resources. The greenhouse gas reduction effect increased from about 560,000 t CO2e to about 670,000 t CO2e, resulting in an additional greenhouse gas reduction of about 110,000 t CO2e.