ABSTRACT PT Riau Andalan Pulp and Paper as one of the largest Indonesia’s pulp and paper factory, produces screen reject pulp waste from the Fiberline Department, and sludge from the Effluent Treatment Department in large quantities. Both types of waste are reused as fuel in the Power boiler unit (Steam Power Plant unit) to reduce landfill’s heap. Power boiler #3 uses biomass dominance fue…