음식물류 폐기물을 이용한 혐기성 소화 시 생분해도 해석 방법에 따른 이론적 메탄발생량 평가 = Biodegradability Analysis of Methane Production via Anaerobic Digestion of Food Waste

다국어 초록 (Multilingual Abstract)

This study exploits a biodegradability analysis method to evaluate the methane produced by the anaerobic digestionof food waste. Four different types of food waste were considered as substrates. The results revealed that the contentsof lipids and carbohydrates varied considerably with the substrate type. Prior to anaerobic digestion, two types of foodwaste, named S1 and S2, exhibited high carbohydrate content (56.9% and 66.3%) but low lipid content (13.5% and 9.4%).
By comparison, the other two types of food waste, named S3 and S4, had high levels of lipids (36.1% and 35.9%) butlow carbohydrates content (29.4% and 25.4%). Protein levels were similar (32.1 ~ 39.7%) across all in the four types offood waste. Batch anaerobic digestion tests elucidated that S3, which had high lipid content, yielded the highest ultimatemethane production (UMY) (490.8 mL CH4/g VS) that was 1.2 times greater than the UMY associated with S2 (413.1mL CH4/g VS), which had higher carbohydrate content. Further biodegradability analyses established that the compositionof organic matter was more advantageous than elemental composition in evaluating the amount of methane generatedfrom the anaerobic degradation of food waste. The Dual-Gompertz equation is advantageous in calculating the maximummethane generated from the amount of food waste because evaluates the maximum methane generation rate and themaximum methane generation rate by uniquely classifying the decompositions of carbohydrate, protein, and fatdecomposition. Moreover, the Dual-Gompertz equation is anticipated more effectively predict cumulative methanegeneration based on the injected substrate versus the modified Gompertz equation.

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