A Study on Torrefaction Characteristics of Sewage Sludge

하수슬러지의 반탄화 특성에 관한 연구

  • Lim, Dae-Won (Department of Environmental Engineering, Kongju National University) ;
  • Poudel, Jeeban (Division of Mechanical and Automotive Engineering, Kongju National University) ;
  • Oh, Sea Cheon (Department of Environmental Engineering, Kongju National University)
  • Received : 2014.07.10
  • Accepted : 2014.07.27
  • Published : 2014.10.10


In this work, the effect of torrefaction on the basic characteristic of sewage sludge was studied to evaluate the energy potential as a solid fuel. Torrefaction experiments were performed at temperatures of $150{\sim}600^{\circ}C$. The torrefied sewage sludge was characterized by the energy yield, ash content, volatile fraction and high heating value (HHV). The gaseous products from torrefaction of the sewage sludge were also analyzed. Thermogravimetric analysis was carried out for the kinetic analysis of sewage sludge torrefaction. From this work, it was found that the ash content increased with an increase of the torrefaction temperature while the energy yield, HHV and volatile fraction decreased. It was also found that the emission of carbon monoxide and hydrocarbon gases started at $300^{\circ}C$ by the thermal degradation of volatile components in the sewage sludge.


Supported by : 공주대학교


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