THE Economic Assesment On Bottom Ash Utilizing As The Bio Coal Fuel

Abstract

Coal bottom ash was included in Hazardous and Toxic Waste (LB3), which requires seriously manage not to warm the environment and humans health. LB3 management becomes an obligation for the industry which producing it and being a burden in itself due to the project of waste utilization often regarded as the high-cost investment projects or less profitable. This study aims to conduct an economic assessment of pilot-scale projects to reuse bottom ash to support the clean industry strategy. The study mixed coal bottom ash with biomass from municipalities solid waste (MSW), called bio-coal fuel. These raw materials were combined with a composition 60%:40% weight (bottom ash: biomass) to be briquette form by adding amylum as a binder. This study used the benefit-cost analysis approach to assess economic feasibility. Tree indicators used in this study were net benefit-cost ratio, payback period, and return on investment. These indicators provided the company policy to continue or stop this project. The finding study showed that the company got a payback period and the net benefit from the ninth year. The company also achieved a net B/C ratio was more than one, and ROI was 1.09 times in the ninth year. The other beneficiaries acquired by the company was included external costs, such as risks from commitment failure by third parties in coal waste management, costs rising risk of purchasing coal, and given a positive value for providing employment.