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Solid Waste from Swine Wastewater as a Fuel Source for Heat Production

  • Park, Myung-Ho (Department of Mechanical Engineering, Kangwon National University) ;
  • Kumar, Sanjay (Department of Animal Life System, Kangwon National University) ;
  • Ra, ChangSix (Department of Animal Life System, Kangwon National University)
  • Received : 2012.05.31
  • Accepted : 2012.08.13
  • Published : 2012.11.01

Abstract

This study was to evaluate the feasibility of recycling the solids separated from swine wastewater treatment process as a fuel source for heat production and to provide a data set on the gas emissions and combustion properties. Also, in this study, the heavy metals in ash content were analyzed for its possible use as a fertilizer. Proximate analysis of the solid recovered from the swine wastewater after flocculation with organic polymer showed high calorific (5,330.50 kcal/kg) and low moisture (15.38%) content, indicating that the solid separated from swine wastewater can be used as an alternative fuel source. CO and NOx emissions were found to increase with increasing temperature. Combustion efficiency of the solids was found to be stable (95 to 98%) with varied temperatures. Thermogravimetry (TG) and differential thermal analysis (DTA) showed five thermal effects (four exothermic and one endothermic), and these effects were distinguished in three stages, water evaporation, heterogeneous combustion of hydrocarbons and decomposition reaction. Based on the calorific value and combustion stability results, solid separated from swine manure can be used as an alternative source of fuel, however further research is still warranted regarding regulation of CO and NOx emissions. Furthermore, the heavy metal content in ash was below the legal limits required for its usage as fertilizer.

Keywords

DTA;Energy;Flocculation;Swine Wastewater;Thermogravimetry

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