PrayitnoH., RustamajiH., ArafatY., Amrul and PrabowoA.D. 2026. Thermochemical-Mechanical Assessment of Washed and Torrefied Biomass Co-Firing in Boilers for a Sustainable Energy Transition. The Journal of Indonesia Sustainable Development Planning. 7, 1 (Apr. 2026), 99-116. DOI:https://doi.org/10.46456/jisdep.v7i1.1010.