Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Anaerobic Mono- and Co-digestion of Primary Sludge, Secondary Sludge and Food Waste: Biogas Production at Different Mixture Ratio

일차슬러지, 이차슬러지 및 음식물류폐기물의 단독 및 통합 혐기성 소화: 혼합비율 차이에 따른 바이오가스 생산량 조사

  • Seonmin Kang (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University) ;
  • Minjae Kim (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University) ;
  • Juyun Lee (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University) ;
  • Sungyun Jung (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University) ;
  • Taeyoon Lee (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University) ;
  • Kwang Hee Nam (Industry-university Cooperation Foundation, Pukyong National University) ;
  • Joonyeob Lee (Division of Earth Environmental System Science (Major of Environmental Engineering), Pukyong National University)
  • 강선민 (부경대학교 지구환경시스템과학부(환경공학전공)) ;
  • 김민재 (부경대학교 지구환경시스템과학부(환경공학전공)) ;
  • 이주윤 (부경대학교 지구환경시스템과학부(환경공학전공)) ;
  • 정성윤 (부경대학교 지구환경시스템과학부(환경공학전공)) ;
  • 이태윤 (부경대학교 지구환경시스템과학부(환경공학전공)) ;
  • 남광희 (부경대학교 산학협력단) ;
  • 이준엽 (부경대학교 지구환경시스템과학부(환경공학전공))
  • Received : 2022.11.24
  • Accepted : 2022.12.30
  • Published : 2023.01.31
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Abstract

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.

Keywords

Acknowledgement

이 논문은 2022년 부경대학교 국립대학육성사업 지원비에 의하여 연구되었습니다. 또한 이 성과는 2021년도 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구입니다(No. 2021R1C1C1009122). 또한 본 연구는 환경부의 폐자원에너지화 전문인력양성사업으로 지원되었습니다(YL-WE-21-002).

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