<![CDATA[This study aimed to analyze the utilization of biogas derived from Palm Oil Mill Effluent (POME) as an alternative fuel in a biomass boiler system at a palm oil mill. This study employed a quantitative experimental approach through direct testing on an existing boiler unit using biomass combustion and hybrid combustion involving biomass and biogas. The research stages included POME biogas characterization, burner prototype design and testing, burner integration with the boiler, and evaluation of combustion stability and solid fuel substitution. The results showed that POME biogas could be utilized as a partial substitute fuel in the biomass boiler system. The use of biogas maintained combustion stability and reduced palm fiber and shell consumption without disrupting the continuity of steam generation. Although the heating value and supply of biogas fluctuated, the combustion system remained operational through appropriate adjustment of the biogas flow rate. Based on these findings, the integrated biogas-burner-boiler system is technically feasible as a solution to improve energy utilization efficiency, optimize POME waste utilization, and reduce dependence on solid biomass fuels in the palm oil industry. Keywords: Biogas, Boiler, Fuel Substitution, Palm Oil Mill Effluent, Thermal Efficiency ]]>
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