Modeling of Electrical Energy Generation and Production of Compost from Solid Waste in Dhaka City

Abstract

Present solid waste management system in Dhaka city is reviewed and the constraints and shortfalls are discussed. A system dynamics computer model is presented to predict population, solid waste generation and composite index, electricity generation from solid waste and composting. Simulated results show that population, solid waste generation, public concern and composite index increase with time. The model was also simulated to assess the potentials of electricity generation from solid waste for Dhaka city and production of compost. Electricity from solid waste could supply a significant portion of the electricity demand of Dhaka city. Composting is a less costly proposition with a composite index much higher than that of electricity generation from solid waste This higher value of the composite index for composting is due to the fact that 50% of non-recyclable solid waste by weight is converted into compost and the rest of the material is dumped as untreated. The composts are good quality organic fertilizers for vegetables and other crops. Finally, this model can be used as a computer laboratory for urban solid waste management policy analysis of electricity generation and composting.