This study evaluated the biochemical methane potential (BMP) of primary sludge, secondary sludge, and food waste in batch anaerobic mono-digestion tests, and investigated the effects of mixture ratio of those organic wastes on methane yield and production rate in batch anaerobic co-digestion tests, that were designed based on a simplex mixture design method. The BMP of primary sludge, secondary sludge and food waste were determined as 234.2, 172.7, and 379.1 mL CH4/g COD, respectively. The relationships between the mixing ratio of those organic wastes with methane yield and methane production rate were successfully expressed in special cubic models. Both methane yield and methane production rate were estimated as higher when the mixture ratio of food waste was higher. At a mixing ratio of 0.5 and 0.5 for primary sludge and food waste, the methane yield of 297.9 mL CH4/g COD was expected; this was 19.4% higher than that obtained at a mixing ratio of 0.3333, 0.3333 and 0.3333 for primary sludge, secondary sludge, and food waste (249.5 mL CH4/g COD). These findings could be useful when designing field-scale anaerobic digersters for mono- and co-digestion of sewage sludges and food waste.

Abstract
1. 서 론
2. 재료 및 방법
3. 결과 및 고찰
    3.1. 일차슬러지, 이차슬러지 및 음식물류폐기물 성상분석 결과
    3.2. 일차슬러지, 이차슬러지 및 음식물류폐기물의단독 혐기성 소화 결과
4. 결 론
감사의 글
REFERENCES

• 강선민(부경대학교 지구환경시스템과학부(환경공학전공)) | Seonmin Kang (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University, Busan 48513, Korea)
• 김민재(부경대학교 지구환경시스템과학부(환경공학전공)) | Minjae Kim (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University, Busan 48513, Korea)
• 이주윤(부경대학교 지구환경시스템과학부(환경공학전공)) | Juyun Lee (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University, Busan 48513, Korea)
• 정성윤(부경대학교 지구환경시스템과학부(환경공학전공)) | Sungyun Jung (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University, Busan 48513, Korea)
• 이태윤(부경대학교 지구환경시스템과학부(환경공학전공)) | Taeyoon Lee (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University, Busan 48513, Korea)
• 남광희(부경대학교 산학협력단) | Kwang Hee Nam (Industry-university Cooperation Foundation, Pukyong National University, Busan 48513, Korea)
• 이준엽(부경대학교 지구환경시스템과학부(환경공학전공)) | Joonyeob Lee (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University, Busan 48513, Korea) Corresponding author