Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Combustion Characteristics for Dry Food Waste

음식폐기물의 고형연료화를 위한 연소특성 연구

  • Sang, Byoungchan (Department of Environmental Engineering, Hanbat National University) ;
  • Lee, Seungjeong (Department of Environmental Engineering, Hanbat National University) ;
  • Lee, Doyeon (Department of Civil and Environmental Engineering, Hanbat National University) ;
  • Ohm, Taein (Department of Civil and Environmental Engineering, Hanbat National University)
  • 상병찬 (한밭대학교 환경공학과) ;
  • 이승정 (한밭대학교 환경공학과) ;
  • 이도연 (한밭대학교 건설환경공학과) ;
  • 엄태인 (한밭대학교 건설환경공학과)
  • Received : 2022.12.01
  • Accepted : 2022.12.06
  • Published : 2022.12.30
Download PDF
⟨ Previous Next ⟩

Abstract

This study analyzed the physicochemical properties and combustion characteristics of dry food waste to evaluate the possibility of using food waste as a solid refuse fuel (SRF). The characteristics of dry food waste as a fuel were analyzed by comparing the difference in properties with SRF, and the combustion characteristics after conversion into fuel were identified. Ultimate analysis, proximate analysis, calorific value analysis, and TGA analysis were conducted using two types of food waste and two types of SRF, and the following results were obtained. The moisture content and ash content of dry food waste were 1.7~10.0 wt.% and 7.8~11.7 wt.%, respectively, which satisfied the quality standards for SRF. The low calorific value of dry food waste was 4,000 ~ 4,720 kcal/kg, which was higher than the quality standard of 3,500 kcal/kg for SRF. As a result of TGA analysis of dry food waste, the combustion reaction started at about 200 ℃ and the highest burning rate was at about 500 ℃. After moisture evaporation between 100 and 200 ℃, initial volatile matter, carbon and residual volatile matter were released and burned between 200 and 500 ℃. Based on the high calorific value and low moisture and ash content of dry food waste, it is considered that it is possible to convert dry food waste into SRF through the application of efficient drying technology and strict quality standard inspection in the future.

본 연구는 유기성 폐기물 중 음식 폐기물의 고형연료제품으로서의 활용 가능성을 평가하기 위해 건조 음식 폐기물의 물리화학적 성질 및 연소 특성을 분석하였다. 기존 고형연료와의 성상 차이를 비교함으로써 건조음식 폐기물의 연료로서의 특성을 분석 하였으며, 연료화 후 연소 특성을 파악하였다.음식 폐기물 시료 2종과 고형연료 제조설비로부터 생산된 고형연료 시료 2종을 이용하여 원소분석, 공업분석, 발열량분석, TGA 분석 실험을 진행 하였으며 다음과 같은 결과를 얻었다. 건조 음식 폐기물의 수분함량과 회분함량은 각각 1.7~10.0 wt.%, 7.8~11.7 wt.%로 고형연료 품질기준을 만족하였으며, 건조 음식 폐기물의 저위발열량은 4,000~4,720 kcal/kg으로 고형연료의 품질기준인 3,500 kcal/kg보다 높은 것으로 나타났다. 건조 음식 폐기물의 TGA 분석 결과, 연소반응은 약 200℃에서 시작하여 약 500℃에서 연소 속도가 가장 높았다. 100~200℃ 사이에서 수분 증발 후, 200~500℃ 사이에서 초기 휘발분, 탄소 및 잔류 휘발분의 방출 및 연소가 이루어졌다. 건조 음식 폐기물의 높은 발열량 및 낮은 수분, 회분 함량을 바탕으로 향후 효율적 건조 기술 적용 및 엄격한 품질 기준 검사를 통해 건조 음식 폐기물의 고형연료화가 가능한 것으로 판단된다.

Keywords

Acknowledgement

이 논문은 환경부의 폐자원에너지화 특성화대학원사업에서 지원받았습니다.

References

  1. Hyeon, W., Jin, Y., Jo, E., Han, H., Min, S. and Yeo, W., "Characteristics of the Co-Combustion of Coal and Bio-Solid Fuel using Biomass as an adjunct", Journal of the Korea Organic Resources Recycling Association, 28(2), pp. 49~57. (2020). https://doi.org/10.17137/KORRAE.2020.28.2.49
  2. Lee, W. J., "Study on Torrefaction Characteristics of Solid Biomass Fuel and Its Combustion Behavior", Journal of the Korea Organic Resources Recycling Association, 23(4), pp. 86~94. (2015). https://doi.org/10.17137/korrae.2015.23.4.086
  3. Cha, J., Cheon, A., Yang, H., Kim, M., Park, B., Bae, J. and Jun, H., "Post-treatment Efficiency Evaluation of Anaerobic Digestion Effluent through Bio-electrochemical Biochemical Methane Potential Test", Journal of Korea Society of Waste Management, 39(5), pp. 470~476. (2022). https://doi.org/10.9786/kswm.2022.39.5.470
  4. Wang, H., Zhang, Y. and Angelidaki, I., "Ammonia inhibition on hydrogen enriched anaerobic digestion of manure under mesophilic and thermophilic conditions, Water Research, 105, pp. 314~319. (2016) https://doi.org/10.1016/j.watres.2016.09.006
  5. Rajagopal, R., Masse, D. I. and Singh, G., "A critical review on inhibition of anaerobic digestion process by excess ammonia", Bioresource Technology, 143, pp. 632~641 (2013). https://doi.org/10.1016/j.biortech.2013.06.030
  6. Oh, J. I. and Lee, H. J., "Experimental Evaluation and Resident's Assessment of Zero Food Waste System in Multifamily Housing Estates", Journal of Korean Society of Environmental Engineers, 37(12), pp. 674~681. (2015). https://doi.org/10.4491/KSEE.2015.37.12.674
  7. Yoon, E. J., Oh, J. I. and Yoon, J. H., "Evaluation of Food waste-compost Maturity with the Seed Germination Index of Plants", Journal of Korean Society of Environmental Engineers, 36(10), pp. 667~671. (2014). https://doi.org/10.4491/KSEE.2014.36.10.667
  8. Jeong, C. J., Park, S. and Song, H., "High-Grade Characteristics of Solid Refuse using Food Waste Fermentation Product", Journal of Korean Society of Environmental Engineers, 40(9), pp. 372~377. (2018). https://doi.org/10.4491/KSEE.2018.40.9.372
  9. Son, H., Park, Y. and Kim, S., "A Study on Combustion Characteristics of Pulverized Fuel Made from Food Waste", J. of Korean Society for New and Renewable Energy, 4(4), pp. 37~43. (2008).
  10. Kim, S., Rho, J., Lee, S., Lee, J., Choi, A., Lee, S., Park, Y., Park, M., Park, J. and Seo, D., "Effect of Pyrolysis Temperature on Physicochemical Properties of Food Waste Biochar", Proceedings of the Korean Society of Environmental Agriculture Conference, p. 173. (2022).
  11. Gu, J. and Oh, S. C., "Combustion Chracteristics of Biomass and Refuse Derived Fuel", Applied Chemistry for Engineering, 23(5) pp. 456~461. (2012).
  12. Lee, J., Choi, J., Chae, J., Joo, J. C. and Ohm, T., "An optimization study on the drying system for the food waste with the closed vapor recirculation system", Journal of Korea Society of Waste Management, 36(4), pp. 375~384. (2019). https://doi.org/10.9786/kswm.2019.36.4.375
  13. Bialowieca, A., Pulka, J., Stepien, P., Manczarski, P. and Golaszewski, J., "The RDF/SRF torrefaction: An effect of temperature on characterization of the product Carbonized Refuse Derived Fuel", Waste Managament, 70, pp. 91~100. (2017). https://doi.org/10.1016/j.wasman.2017.09.020
  14. Iacovidou, E., Hahladakis, J., Deans, I., Velis, C. and Purnell, P., "Mechnical properties of biomass and solid recovered fuel (SRF) co-fired with coal: Impact on multi-dimensional resource recovery value", Waste Managament, 73, pp. 535~545. (2017).