Valorization of residues from refining of used vegetable oils

This study investigates the advantages of two-phase anaerobic digestion for treating a mixture (1/5 v/v) of used vegetable oils processing wastes and pig manure using two semi-continuous digesters operated at mesophilic temperature (37±1 ºC). The experiments were conducted at hydraulic retention times (HRT) of 0.5, 1, 2 and 4 days in the first stage (acidifier) and at HRT of 11.5, 15, 18 and 20 days in the second stage (methanizer). The results revealed that the HRT had a high influence on the soluble chemical oxygen demand (CODs) and total dissolved solids (TDS) removal. The maximum total CODs removal efficiency of 86.4% and TDS removal efficiency of 81.9% was achieved at 20 days of global HRT. The maximum biogas production of 0.65 m3 per kilogramme of volatile dissolved solids (VDS) removed (65% CH4) was also achieved at 20 days of HRT.

• Autores: Hidalgo-Barrio, Dolores; Gómez-Rincón, Marta; Aguado-Pesquera, Alicia; Martín-Marroquín, Jesús María; Sastre-García, Emilia
• Tipo de recurso: Article of journal
• Fecha de publicación: 2014
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/72911
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/72911; http://bdigital.unal.edu.co/37386/
• Palabra clave: oily wastes; two-phase anaerobic reactor; waste vegetable oil
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional