Using brewer’s spent grain (BSG) for biogas production is a sustainable solution that reduces environmental impact. Thermochemical pre- and post-treatment processes improve BSG anaerobic digestion, increasing biogas yield and reducing plant size. While drying the spent grain may initially seem cost-effective, it primarily serves as waste disposal and faces challenges in the market. Recycling BSG into biogas replaces natural gas in brewery boilers, lowering capital costs. Biogas plants are economically viable, as they not only consume waste but also generate energy, contributing to decarbonization and sustainability efforts in breweries.
In summary, utilizing BSG for biogas production offers an effective renewable energy solution. Pre-treatment is crucial for economic viability, and converting brewery residues into biogas enhances sustainability. Biogas plants, compared to drying methods, provide greater economic benefits and allow breweries to achieve their decarbonization and sustainability goals.
