Quantity and Quality Analysis of RDF (Refused Derived Fuel) as an Alternative Fuel Substitution for Coal in a Cement Industry.

Demand level of fossil energy as fuel shows tremendous value, especially in the production of cement. The process of converting kiln into clinker needs 450 grams of coal to produce 900 grams of cement. PT Semen Indonesia cooperates with Gresik government to process municipal solid waste (MSW) in the final disposal area. The waste would be separated into Refuse Derived Fuel (RDF), fertilizer, and construction material. RDF production is considered as a positive solution which necessary to be analyzed based on the quality of RDF and quantity of MSW as raw material. The RDF characteristic that affects the quality was ranked based on important response using Quality Function Deployment (QFD) method. While the quantity of MSW was simulated using system dynamic on Ventana Simulation (Vensim) software. Generally, the results show that there are six main characteristics of RDF that found based on importance response, specifically in size, particulate, moisture content, mercury, calorific value, and ash content. As a consequence, the production process of RDF should be adjusted to meet the required characteristics. Moreover, based on simulation, the MSW as a raw material is available for production RDF at maximum capacity, 300 ton/day. [ABSTRACT FROM AUTHOR]