The Digest’s 2025 Multi-Slide Guide to Digestate Processing for High-Value Bio-Fertilizer Production

Digestate processing aims to reduce quantity or purify biogas byproducts, driven by high transport costs and legal restrictions. The key innovation is producing high-value bio-fertilizer products like struvite, dried pellets, or ammonium sulphate solution. While direct land application remains common, establishing robust markets for these standardized bio-fertilizers is a critical bottleneck, necessitating legal clarity on waste-derived products. Various technologies, from solid-liquid separation to membrane processes, balance processing against transport savings.n.