Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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Estimation of Characteristics Treatment for Food Waste and Valuable as Solid Refuse Fuel (SRF) using Bio-drying Process

Bio-drying 공법을 이용한 음식물류 폐기물 분해 특성 평가 및 고형연료로서의 가치 평가

  • Jeong, Cheoljin (Plant engineering center, Institute for Advanced Engineering) ;
  • Park, Seyong (Plant engineering center, Institute for Advanced Engineering) ;
  • Oh, Dooyoung (Plant engineering center, Institute for Advanced Engineering) ;
  • Jang, Eun-Suk (Plant engineering center, Institute for Advanced Engineering) ;
  • Song, Hyoungwoon (Plant engineering center, Institute for Advanced Engineering)
  • 정철진 (고등기술연구원 플랜트엔지니어링 본부) ;
  • 박세용 (고등기술연구원 플랜트엔지니어링 본부) ;
  • 오두영 (고등기술연구원 플랜트엔지니어링 본부) ;
  • 장은석 (고등기술연구원 플랜트엔지니어링 본부) ;
  • 송형운 (고등기술연구원 플랜트엔지니어링 본부)
  • Received : 2016.12.21
  • Accepted : 2017.01.26
  • Published : 2017.03.30
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Abstract

In this study, water and organic treatment efficiency and operating characteristics (temperature, salinity effect) were evaluated when food waste with high water content was treated by Bio-dying method. In addition, the optimum conditions for producing pellets for evaluating the decomposition products as SRF(Solid Refuse Fuel) after Bio-drying and evaluating the use value of SRF as a solid fuel were analyzed. As a result, the temperature, $CO_2$ concentration, organic matter removal rate and weight reduction rate according to the daily dose were about 86% and 68% at the input of 2.4 kg/day. The optimal food waste input was estimated to be 2.4 kg/day. As a result of the pellet molding and produce, Pellets can be produced within 10~25% of raw material water content. It was judged that the water content of 25%, which showed the best quality results in terms of external shape maintenance and strength. The high calorific value of SRF of decomposition products after Bio-drying was more than 3,500 kcal/kg.

본 연구에서는, 높은 함수율을 가진 음식물류 폐기물을 Bio-dying 공법을 이용하여 처리하였을 때 수분과 유기물의 변화정도를 분석하였으며 음식물류 폐기물 처리 시 온도와 염도가 Bio-dying 공법의 운전특성에 미치는 영향을 평가하였다. 또한, Bio-drying 후 분해산물의 SRF(Solid Refuse Fuel)로서의 가치 평가를 위한 펠렛 제조의 최적조건 도출 및 SRF의 발열량 분석을 통한 고형연료로서의 가치를 평가하였다. 그 결과, 1일 투입량에 따른 온도, $CO_2$ 농도, 유기물 제거율과 무게 감소율 값을 분석하였다. 유기물 제거율과 무게 감소율은 투입량 2.4 kg/day에서 각각 86%, 68%로 최대값을 나타내었다. 이를 통해 최적 음식물류 폐기물 투입량은 2.4 kg/day라 판단되었다. 펠렛 성형 결과, 원료 함수율이 10~25% 이내에서 펠렛 제조가 가능하고, 외형유지와 강도면에서 가장 좋은 품질결과를 보여준 함수율 25%가 가장 적합하다고 판단되었다. Bio-drying 후 분해산물의 SRF 고위발열량은 3,500 kcal/kg 이상의 값을 나타내었다.

Keywords

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