음식물류폐기물과 축산분뇨의 혼합소화를 위한 최적 조건 설정에 관한 연구 (A Study on Optimization Conditions for Anaerobic Co-digestion of Food Wastes with Livestock Wastes)

서지정보

· 발행기관 : 한국폐기물자원순환학회
· 수록지 정보 : 한국폐기물자원순환학회지 / 29권 / 4호 / 356 ~ 364페이지
· 저자명 : 박진규, 정새롬, 강정희, 안영미, 진효언, 이남훈

초록

In this study, optimization of anaerobic co-digestion for food and livestock wastes was studied by an experimental design method. A central composite design (CCD) was applied in designing experiments. Selected two independent variables for this study were initial substrate concentration and mixing rate of livestock wastes. The ranges of experiment for initial substrate concentration and mixing rate of livestock wastes were 2~10 g-VS/L and 0~100%, respectively. Selected responses were methane yield, maximum methane production rate and volatile solids (VS) removal rate. The experimental design was analyzed using a response surface methodology (RSM). Models obtained by the RSM were analyzed by analysis of variance (ANOVA). ANOVA demonstrated that the models were highly significant. Optimal conditions obtained for the models were initial substrate concentration of 2.1 g-VS/L and mixing rate of livestock wastes of 48.8%,respectively. The measured values under the optimal conditions were well in agreement with the predicted values from the models. Thus, it showed that the CCD and RSM were appropriate for determination of an optimal mixing condition in the anaerobic co-digestion process for food and livestock wastes.

영어초록

In this study, optimization of anaerobic co-digestion for food and livestock wastes was studied by an experimental design method. A central composite design (CCD) was applied in designing experiments. Selected two independent variables for this study were initial substrate concentration and mixing rate of livestock wastes. The ranges of experiment for initial substrate concentration and mixing rate of livestock wastes were 2~10 g-VS/L and 0~100%, respectively. Selected responses were methane yield, maximum methane production rate and volatile solids (VS) removal rate. The experimental design was analyzed using a response surface methodology (RSM). Models obtained by the RSM were analyzed by analysis of variance (ANOVA). ANOVA demonstrated that the models were highly significant. Optimal conditions obtained for the models were initial substrate concentration of 2.1 g-VS/L and mixing rate of livestock wastes of 48.8%,respectively. The measured values under the optimal conditions were well in agreement with the predicted values from the models. Thus, it showed that the CCD and RSM were appropriate for determination of an optimal mixing condition in the anaerobic co-digestion process for food and livestock wastes.

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