Two-stage (liquid-solid) anaerobic mono-digestion of ammonia-rich chicken manure at low-temperature: Operational strategy and techno-economic assessment

•Mono-digestion of chicken manure was achieved using a high solids anaerobic digester (HSAD).•HSAD was operated at low temperature and high organic loading rate of 8.7 gVS/L.d.•Inoculum acclimated to high-N level reduced start-up phase and improved degradation.•HSAD produced high methane concentration (>60%) with no ammonia inhibition.•Techno-economic analysis showed a payback period of 9-yrs (NPV>0) for this process.