4. Conclusions
This study illustrates the utilization of waste cooking oil, waste paper, and food waste generated at UC for on-site energy production and use. The inventory study and technical feasibility assessment showed that the resulting biodiesel, fuel pellets, and biogas can replace 3153 L (834 gallons) of petrochemical diesel, 121 tonnes of coal and 12,767 m3 natural gas every year. The on-site conversion of waste into energy reduces both capital and operational costs for all three of the waste management options considered. The economic analysis indicated the biodiesel option requires relatively smaller capital investment when compared to the fuel pellet and biogas options. The payback periods for the three options
were estimated to be 16, 155 and 74 months for the biodiesel, fuel pellets and biogas projects, respectively. The estimated reduction of GHG emission from the implementation of the three WTE projects were 9.37 tonnes CO2-eq/yr for biodiesel, 260.49 tonnes CO2- eq/yr for fuel pellets and 11.36 tonnes of CO2-eq/yr for biodiesel