چكيده به لاتين
Producing biofuels and biogas from biomass is one of the effective solutions to reduce the use of fossil fuels and release less greenhouse gases. Due to the lack of waste management by the country's livestock, the use of biomass resources of these centers, lead to contributing waste management as well as producing bio-heat and bio-electricity. In this research A mixed integer linear programming mathematical model is presented in order to design a bio-energy supply chain. The model determines the optimal location of biogas power plants in Hassanabad, a rural district in Rey county of Tehran province with two objectives of cost minimization and minimizing greenhouse gas emission. The return of bio-product to the supply points has a quantitative positive effect on environmental target. In order to determine the potential locations for the construction of the biogas power plant, in the first stage, regional capabilities have been considered by GIS software, and in the second stage, they have been entered into Gamz software in order to be optimized. The model was solved by using epsilon constraint method. Finally, after implementing the proposed model in the case study, three villages were selected for the construction of the power plant and one village for the collection center of biomass. The results of sensitivity analysis showed that the economic objective function decreases by 0.42% with a 10% increase in the unit price of selling the generated electricity to the grid, decreases by 0.34% with a 10% increase in the percentage of heat demand and decrease by 8.2% with a 10% increase in the heat and electricity generation capacity in the power plant while the environmental objective function decreases by 0.006% with a 10% increase in the unit price of selling the generated electricity to the grid and decrease by 5.6% with a 10% increase in the percentage of heat demand, and increases by 0.0038% with a 10% increase in the capacity of heat and electricity production in the power plant.
