title: Integral valorisation of waste orange peel using combustion, biomethanisation and co-composting technologies.
abstract: Although recent research has demonstrated that waste orange peel (WOP) is a potentially valuable resource that can be transformed into high value products, heat generation, biomethanisation and composting might be considered the most feasible alternatives in terms of yield. This study revealed that WOP can be successfully valorised through combustion. However, a previous drying step, which generates hazardous wastewater, is required and harmful NOx are emitted with the flue gases. In contrast, a high yield of renewable methane (280LSTPCH4/kg added COD, chemical oxygen demand) and an organic amendment can be obtained through the thermophilic biomethanisation of WOP following the removal of valuable essential oils from the peel. Co-composting of WOP combined at different proportions (17-83%) with the organic fraction of municipal solid waste (OFMSW) was also demonstrated to be suitable. Moreover, a 37% reduction in odour generation was observed in co-composting of WOP compared to single composting of OFMSW.
authors.affiliation: Chemical Engineering Department, University of Córdoba, Campus Universitario de Rabanales, Ctra. N-IV, km 396, building Marie Curie (C-3), CP/14071 Córdoba, Spain.
authors.forename: J A
authors.initials: JA
authors.lastname: Siles
authors.affiliation: Chemical Engineering Department, University of Córdoba, Campus Universitario de Rabanales, Ctra. N-IV, km 396, building Marie Curie (C-3), CP/14071 Córdoba, Spain.
authors.forename: F
authors.initials: F
authors.lastname: Vargas
authors.affiliation: Chemical Engineering Department, University of Córdoba, Campus Universitario de Rabanales, Ctra. N-IV, km 396, building Marie Curie (C-3), CP/14071 Córdoba, Spain.
authors.forename: M C
authors.initials: MC
authors.lastname: Gutiérrez
authors.affiliation: Chemical Engineering Department, University of Córdoba, Campus Universitario de Rabanales, Ctra. N-IV, km 396, building Marie Curie (C-3), CP/14071 Córdoba, Spain.
authors.forename: A F
authors.initials: AF
authors.lastname: Chica
authors.affiliation: Chemical Engineering Department, University of Córdoba, Campus Universitario de Rabanales, Ctra. N-IV, km 396, building Marie Curie (C-3), CP/14071 Córdoba, Spain. Electronic address: iq2masam@uco.es.
authors.forename: M A
authors.initials: MA
authors.lastname: Martín
mesh_terms: D032084:Citrus sinensis / Q000737:chemistry; D008697:Methane; D012037:Refuse Disposal / Q000379:methods*; D012987:Soil; D062611:Solid Waste / Q000032:analysis
chemical_list: D012987:Soil; D062611:Solid Waste; D008697:Methane
keywords: Biogas; Co-composting; Combustion; Odor; Waste orange peel