Sewage Sludge Drying and Heating Valorization

This study explores a sustainable method for converting sewage sludge with 80% water content into reusable biochar through drying and pyrolysis. The drying phase reduces water content to 12-15% using energy from pyrolysis-produced biochar, minimizing external energy requirements. Pyrolysis decomposes organic materials, producing biochar, gases, and oils, which are burned for energy recovery. The biochar can be reused up to eight times, enhancing resource efficiency and sustainability. Heat generated during both drying and pyrolysis is recycled within the system, further improving energy efficiency. The process demonstrates an innovative, closed-loop approach to waste management, minimizing waste and maximizing energy recovery, with significant potential for industrial applications.