The article discusses the importance of decarbonising energy production to mitigate climate disasters and the potential of sustainable hydrogen production. It highlights a novel approach of extracting hydrogen from underutilised lignin-rich biorefinery waste, specifically sludges generated post hydrolysis. Through gasification at high temperatures in a controlled environment, a gas-rich product with high hydrogen content was achieved. By optimizing the treatment process of sludges from barley and wheat straw, hydrogen concentrations of around 27.95 vol.% and 22.12 vol.% were obtained, showcasing a waste-to-hydrogen pathway without relying on energy-intensive methods like steam or catalysts. The study also found that the formed sludges were superior in hydrogen production compared to raw feedstocks, indicating a sustainable and efficient strategy for generating hydrogen. Overall, the research presents a promising method for unlocking hydrogen potential from biorefinery waste streams, contributing to a cleaner and more sustainable energy future.