Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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A Study on the Cause of Scale Formation in Biogas Plant with Food Wastewater

음식물류 폐수를 이용한 바이오가스 생산시설의 스케일 형성요인에 관한 연구

  • Bae, Young-Shin (Green Tech. Research Center, SUDOKWON Landfill Site Management Corp.) ;
  • Chun, Seung-Kyu (Green Tech. Research Center, SUDOKWON Landfill Site Management Corp.)
  • 배영신 (수도권매립지관리공사 녹색기술연구센터) ;
  • 천승규 (수도권매립지관리공사 녹색기술연구센터)
  • Received : 2013.09.12
  • Accepted : 2013.09.25
  • Published : 2013.09.30
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Abstract

To find out the major cause of scale formation in digestion facility, a componential analysis of scale and a digestion experiment for food wastewater were conducted. The analysis indicated that grease in food wastewater was closely connected to the organic component of scale. It is also indicated that grease-removed food wastewater showed 58.9% level compared to unprocessed one in crystal generation quantity in this study. The experiment provided insight that grease is one of the important causes of scale formation. Additionally, pre-removal of grease from food wastewater did not show negative effect on digestion gas production, as 68.7 L-gas/kg-COD for grease-removed food wastewater and 67.7 L-gas/kg-COD for unprocessed one.

소화설비내 스케일 형성의 주요 원인을 파악하기 위하여 스케일 성분분석 및 음식물류 폐수에 대한 혐기소화 실험을 하였다. 성분분석결과, 음식물류 폐수 중 유분이 스케일의 유기성분과 밀접한 연관이 있었다. 또한, 소화실험시 소화조내 결정체의 발생량은 음식물류 폐수중 유분을 사전에 제거한 경우가 제거하지 않은 원수를 소화한 경우의 58.9% 수준으로 나타나 유분이 스케일 형성의 중요한 요인임을 알 수 있었다. 아울러, 유분을 제거한 음식물류 폐수는 68.7 L-gas/kg-COD 그리고 음식물류 폐수 원수는 67.7 L-gas/kg-COD로서 유분의 사전제거가 소화가스 생산에 부정적 영향을 주지 않았다.

Keywords

References

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