Abstract
During the anaerobic digestion of restaurant food waste, the sludge obtained as the sediment from the liquid digestate (LDS) is a high–yield solid waste. However, its valorization has not attracted sufficient attention. This study systematically detected the physicochemical properties of this sludge, proposed and evaluated thermal strategies of pyrolysis and combustion. Pyrolysis was a mild endothermic process with considerable H2O, CO2, and hydrocarbon releasing, and the LDS-derived biochar had pore structures and abundant functional groups. Combustion was exothermic in a broad temperature interval of 140 °C–580 °C with emissions of H2O, CO2, and NH3, but the process was mild and slow, revealing the poor combustibility of LDS, in addition, the ash had a medium deposition tendency. According to the results obtained in this study, pyrolysis was suggested as a more appropriate method for the reduction and reutilization of LDS. This work will be useful and helpful for LDS valorization, thereby, facilitating the spread and popularization of anaerobic digestion of food waste.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
