Integration into a citrus juice factory of air-steam gasification and CHP system: Energy sustainability assessment

•A citrus peel gasification-CHP system integrated into a juice factory was proposed.•Sensitivity analysis and energy assessment were supported by process simulation.•The available citrus peels allow producing 7,875 MWh/year of net electricity.•The heat demand for the drying step was covered by the CHP unit.•The non-renewable primary energy and CO2 cut were 27,905 MWh/year and 5,032 t/year.