Dry Anaerobic Digestion of Brewer’s Spent Grains toward a More Sustainable Brewery: Operational Performance, Kinetic Analysis, and Bioenergy Potential

Industrial beer production generates brewer’s spent grains (BSG) as a primary solid waste. The disposal of industrial waste can cause negative environmental side effects, including greenhouse gas emissions. This study evaluated the dry anaerobic digestion (AD) BSG for bioenergy recovery solution toward more sustainable brewery. laboratory-scale agitated tank batch reactor (6.8 L) was started up with (25%), mesophilic inoculum (45%), and water (30%). experimental results showed 82.12% solids biodegradation, 57.38% soluble chemical oxygen demand removal, an accumulated methane yield 10.53 L CH4 kg?1 TVS. efficiency by modified Gompertz, Cone, first-order kinetic models. Cone model fitted evolution better than Gompertz biogas produced from AD could generate electricity (0.133 MWh ton?1) heat (598.45 MJ ton?1), mitigating 0.0099 0.0335 tCO2eq ton?1 BSG, respectively, heat. implementation supply 7.38% 6.86% required production. Finally, in biorefinery concept, be alternative route management recovery, contributing to reduce impact breweries.