Abstract

This paper has applied operation research tosolid waste management systems. The objective is tomaximize expected net carbon dioxide equivalent (CO2 e)offsets from four disposal processes (landfill, incineration,producing refuse derive fuel (RDF) and composting).Recycling or non-recycling processes is selected beforedisposal process. An optimization model was proposed forthe optimal solution and decision-making selects the bestsolution for the solid waste management supply chain forBangkok, Thailand. Maximum capacity of each disposalprocess must fulfill, and the recycling method will be acontrol method. The total amount of municipal solidwaste is indicated 9,727.84 tons and maximum amount ofrecycling waste (827.84 tons) is allowed. The net CO2eoffsets is highly correlated with the quantity of solid waste.Moreover, the disposal process that producing RDF is therecommended decision for the department ofenvironment of Bangkok because of the maximumnumber of CO2e offsets. Eight scenarios were applied tofind the lower amount of the net CO2e offsets. Increasingsanitary solid waste disposal capacities are the mainassumption affected the amount of CO2e emissions and/oroffsets. Scenario 8 increases double capacity for alldisposal techniques, and the net CO2e offsets areincreased from 4,472.89 tons to 8,945.78 tons.Policymakers and plant operators could adopt theproposed optimization model in the selection of high CO2eoffsets system. Moreover, the total number of carbonfootprint for organization (CFO) could be reduced.