상하수도학회지 (Journal of Korean Society of Water and Wastewater)

  • 제29권2호
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  • Pages.183-192
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  • 2015
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  • 1225-7672(pISSN)
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  • 2287-822X(eISSN)
대한상하수도학회 (The Korean Society of Water and Wastewater)
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Box-Behnken 및 반응표면 분석법을 이용한 음식물류 폐수 부상 스컴의 혐기성 소화를 위한 열-알칼리 전처리 최적화

Optimization of Thermal-alkaline Pre-treatment for Anaerobic Digestion of Flotation Scum in Food Waste Leachate Using Box-Behnken Design and Response Surface Methodology

  • 이동영 (수원대학교 토목공학과.하천환경기술연구소) ;
  • 최재민 (수원대학교 토목공학과.하천환경기술연구소) ;
  • 김정광 (수원대학교 토목공학과.하천환경기술연구소) ;
  • 한선기 (한국방송통신대학교 환경보건학과) ;
  • 이채영 (수원대학교 토목공학과.하천환경기술연구소)
  • Lee, Dong-Young (Dept. of Civil Eng., The University of Suwon.Institute of River Environmental Technology) ;
  • Choi, Jae-Min (Dept. of Civil Eng., The University of Suwon.Institute of River Environmental Technology) ;
  • Kim, Jung-Kwang (Dept. of Civil Eng., The University of Suwon.Institute of River Environmental Technology) ;
  • Han, Sun-Kee (Dept. of Environ. Health, Korea National Open University) ;
  • Lee, Chae-Young (Dept. of Civil Eng., The University of Suwon.Institute of River Environmental Technology)
  • 투고 : 2014.11.19
  • 심사 : 2015.04.15
  • 발행 : 2015.04.15
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초록

Response surface methodology (RSM) based on a Box-Behnken Design (BBD) was applied to optimize the thermal-alkaline pre-treatment operating conditions for anaerobic digestion of flotation scum in food waste leachate. Three independent variables such as thermal temperature, NaOH concentration and reaction time were evaluated. The maximum methane production of 369.2 mL $CH_4/g$ VS was estimated under the optimum conditions at $62.0^{\circ}C$, 10.1% NaOH and 35.4 min reaction time. A confirmation test of the predicted optimum conditions verified the validity of the BBD with RSM. The analysis of variance indicated that methane production was more sensitive to both NaOH concentration and thermal temperature than reaction time. Thermal-alkaline pretreatment enhanced the improvement of 40% in methane production compared to the control experiment due to the effective hydrolysis and/or solubilization of organic matters. The fractions with molecular weight cut-off of scum in food waste leachate were conducted before and after pre-treatment to estimate the behaviors of organic matters. The experiment results found that thermal-alkaline pre-treatment could reduce the organic matters more than 10kD with increase the organic matters less than 1kD.

키워드

참고문헌

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