Photo: The trial run was part of a dedication to reducing reliance on fossil fuels
CILEUNGSI – A cofiring trial has successfully taken place at Aspex Kumbong between August and October 2025. It was part of a commitment to reducing reliance on fossil fuels, improving combustion efficiency, and cutting greenhouse gases and other pollutants in favor of more renewable energy generation.
Cofiring involves burning two (or more) different fuels, like coal and biomass, in the same combustion system, usually a boiler and a furnace. The process at Aspex’s warehouse mixed together coal, wood chips, and rice husks, with an average biomass ratio of 3-11%.
Staff members monitored and analyzed the fuel composition ratio, operating parameters, pressure conditions, steam output, and emissions. They also assessed the mechanical performance of the boiler used in the testing.
Evaluation results released Wednesday (10/08) showed strong process stability, efficient steam output, and fewer emissions.
“This trial has helped us tremendously in ensuring our boiler runs smoothly,” said Ahmad Abu Susilo, a shift leader for Aspex’s Power Supply Department.
Photo: Cofiring trial at Aspex involved mixing coal, wood chips, and rice husks at the company’s onsite warehouse
Integration into regular operations is expected next, with biomass as an alternative fuel, said Setiyono, head of Korindo Group (and Aspex Kumbong’s) Learning and Innovation Center.
“Cofiring allows us to support the use of renewables as eco-friendly energy sources.”
Biomass cofiring has been continuously promoted by the state as part of its renewable energy boost and emissions reduction efforts. Biomass holds a key role in Indonesia’s net-zero roadmap, contributing immensely to energy security, rural economic growth, and industrial decarbonization. (LIC)
