<p>The meat processing industry generates substantial amounts of Floated Sludge (FS), which is typically managed through composting. Concurrently, slaughterhouses rely on wood biomass for steam generation, a process associated with substantial operational costs. Despite the high dry-basis calorific value of FS, its combustion in steam generators is challenging due to its chemical properties and elevated moisture content. This study investigates the technical feasibility of cofiring FS with eucalyptus chips in an industrial biomass boiler that provides steam for a poultry and fish processing facility. The properties of FS and eucalyptus chips were characterized and steam generator experiments included eucalyptus chips and mixtures containing 5, 10, 15 and 20% FS in mass basis. The high calorific value of FS (25.53&#xa0;MJ&#xa0;kg⁻¹, dry and ash-free basis) and its high volatile content support its use as fuel. However, its higher ash, moisture, and nitrogen content modify the properties of the blends. In addition, the sludge progressively increases Fe₂O₃ and P₂O₅ in the ash composition while reducing SiO₂, which raises the tendency for fouling and slagging formation. In the experimental tests, cofiring increased boiler efficiency up to a 10% blending ratio, with values of 87.3 ± 2.2% compared to 86.0 ± 1.6% for eucalyptus chips. Emissions of CO, NO, and SO₂ complied with both Brazilian and North American regulations. Cofiring of FS with eucalyptus chips represents a promising alternative to composting, enabling energy recovery and reducing eucalyptus chip consumption in slaughterhouses.</p> Graphical Abstract <p></p>