title: Chemically pretreating slaughterhouse solid waste to increase the efficiency of anaerobic digestion.
abstract: The combined effect of temperature and pretreatment of the substrate on the anaerobic treatment of the organic fraction of slaughterhouse solid waste was studied. The goal of the study was to evaluate the effect of pretreating the waste on the efficiency of anaerobic digestion. The effect was analyzed at two temperature ranges (the psychrophilic and the mesophilic ranges), in order to evaluate the effect of temperature on the performance of the anaerobic digestion process for this residue. The experiments were performed in 6 L batch reactors for 30 days. Two temperature ranges were studied: the psychrophilic range (at room temperature, 18°C average) and the mesophilic range (at 37°C). The waste was pretreated with NaOH before the anaerobic treatment. The result of pretreating with NaOH was a 194% increase in the soluble chemical oxygen demand (COD) with a dose of 0.6 g NaOH per g of volatile suspended solids (VSS). In addition, the soluble chemical oxygen demand/total chemical oxygen demand ratio (sCOD/tCOD) increased from 0.31 to 0.7. For the anaerobic treatment, better results were observed in the mesophilic range, achieving 70.7%, 47% and 47.2% removal efficiencies for tCOD, total solids (TS), and volatile solids (VS), respectively.
authors.affiliation: Environmental Electrochemistry, CIDETEQ, S. C., P.O. Box 064, C.P. 76703, Parque Tecnológico Querétaro S/N, Sanfandila, Pedro Escobedo, Querétaro, Mexico.
authors.forename: Cyntia R
authors.initials: CR
authors.lastname: Flores-Juarez
authors.affiliation: Environmental Electrochemistry, CIDETEQ, S. C., P.O. Box 064, C.P. 76703, Parque Tecnológico Querétaro S/N, Sanfandila, Pedro Escobedo, Querétaro, Mexico. Electronic address: arodriguez@cideteq.mx.
authors.forename: Adrián
authors.initials: A
authors.lastname: Rodríguez-García
authors.affiliation: Environmental Electrochemistry, CIDETEQ, S. C., P.O. Box 064, C.P. 76703, Parque Tecnológico Querétaro S/N, Sanfandila, Pedro Escobedo, Querétaro, Mexico.
authors.forename: Jesús
authors.initials: J
authors.lastname: Cárdenas-Mijangos
authors.affiliation: Environmental Electrochemistry, CIDETEQ, S. C., P.O. Box 064, C.P. 76703, Parque Tecnológico Querétaro S/N, Sanfandila, Pedro Escobedo, Querétaro, Mexico.
authors.forename: Leticia
authors.initials: L
authors.lastname: Montoya-Herrera
authors.affiliation: Environmental Electrochemistry, CIDETEQ, S. C., P.O. Box 064, C.P. 76703, Parque Tecnológico Querétaro S/N, Sanfandila, Pedro Escobedo, Querétaro, Mexico.
authors.forename: Luis A
authors.initials: LA
authors.lastname: Godinez Mora-Tovar
authors.affiliation: Environmental Electrochemistry, CIDETEQ, S. C., P.O. Box 064, C.P. 76703, Parque Tecnológico Querétaro S/N, Sanfandila, Pedro Escobedo, Querétaro, Mexico.
authors.forename: Erika
authors.initials: E
authors.lastname: Bustos-Bustos
authors.affiliation: Environmental Electrochemistry, CIDETEQ, S. C., P.O. Box 064, C.P. 76703, Parque Tecnológico Querétaro S/N, Sanfandila, Pedro Escobedo, Querétaro, Mexico.
authors.forename: Francisco
authors.initials: F
authors.lastname: Rodríguez-Valadez
authors.affiliation: Environmental Electrochemistry, CIDETEQ, S. C., P.O. Box 064, C.P. 76703, Parque Tecnológico Querétaro S/N, Sanfandila, Pedro Escobedo, Querétaro, Mexico.
authors.forename: Juan
authors.initials: J
authors.lastname: Manríquez-Rocha
mesh_terms: D000003:Abattoirs; D000693:Anaerobiosis; D056804:Biofuels / Q000032:analysis; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D012037:Refuse Disposal / Q000379:methods*; D012972:Sodium Hydroxide / Q000737:chemistry*; D062611:Solid Waste / Q000032:analysis*; D013696:Temperature
chemical_list: D056804:Biofuels; D062611:Solid Waste; D012972:Sodium Hydroxide
keywords: Anaerobic digestion; Chemical hydrolysis; Chemical pretreatment; Mesophilic conditions; Psychrophilic conditions; Slaughterhouse waste