ALTERNATIVE OPTIMIZATION OF ASH WASTE UTILIZATION OF STEAM POWER PLANT (2 X 1,000 MW) IN TERMS OF PRODUCTION,ENVIRONMENTAL AND ECONOMIC ASPECTSYUWONO BUDI PRATIKNYO, WAHYONO HADI AND MARITHA NILAM KUSUMAAbstract The Ministry of Energy and Mineral Resources recorded Indonesiaâs electricity consumption in 2018 amounting to 1,064 kilo Watt hours per capita. National electricity consumption continues to increase along with the increase in electrification in all regions and changes in peopleâs lifestyles.The government, through the 35,000 MW electricity program, continues to try fulfilling the national electricity needs through the construction of power plants. Steam Power Plant is one of the alternatives due to the large availability of coal in Indonesia. Currently, there are 166 billion tons of coal resources with 37 billion tons reserve. Speaking of burning coal, it will not be separated from waste ash (fly ash and bottom ash). Many studies have been carried out on the utilization of this waste, including the use of this waste to make other products (brick, light brick, paving, etc.).However, until now each Steam Power Plant has not yet been fully integrated in utilizing the ash waste. The Steam Power Plant only carries out the process of stockpiling or paying to third parties who have permission to use B3 waste to be disposed of. The potential for the use of ash waste (flyash and bottom ash) is very large in Indonesia and spread in various parts of Indonesia. This raises an optimization study and alternative uses of ash waste. The 1,000 MW capacity of Steam Power Plant was chosen because currently it is the largest capacity of Steam Power Plant in Indonesia. The study of optimization and utilization of ash waste is carried out by performing technical calculations, analyzing economic and environmental aspects. From the various alternatives that has been studied, the best alternatives was chosen. In the case of ash waste utilization at a 1,000 MW power plant, the best alternative was to utilize ash waste as Mortar with economic value: NPV Rp.4,023,813,107398 with IRR reaches 15%. The Payback Period is 0.48 Years and Benevit Cost Ratio is 12.27%. |