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Performance evaluation and substrate removal kinetics in the semi-continuous anaerobic digestion of thermally pretreated two-phase olive pomace or “Alperujo”

AutorDe la Lama, David; Borja Padilla, Rafael ; Rincón, Bárbara
Palabras claveTwo-phase olive pomace
Thermal pretreatment
Semi-continuous anaerobic digestion
Substrate removal
Sustainable energy
Kinetic study
Fecha de publicaciónene-2017
EditorElsevier
CitaciónProcess Safety and Environmental Protection 105: 288-296 (2017)
ResumenA study of the semi-continuous anaerobic digestion process of thermally pretreated two-phase olive pomace (TPOP) at 120 °C during 180 min was carried out in laboratory-scale completely stirred tank reactors at mesophilic temperature. Organic loading rates (OLRs) in the range of 2.0–7.0 g VS/(L d) were tested after the pretreatment and the breakage of complex organic matter. Total and soluble chemical oxygen demand (CODt and CODs) removal efficiencies decreased slightly between 77.9–71.7% and 92.3–85.0% when the OLR increased from 2 to 5 g VS/(L d). However, when the OLR increased to 7.0, a sudden decrease in process performance was observed. The maximum methane production rate (1.72 L CH4/(L d)) was achieved at an OLR of 4.5 g VS/(L d). This value was 39.8% higher than that obtained in the semi-continuous anaerobic digestion of untreated TPOP at the same OLR. The modified Stover–Kicannon model and the Grau second-order kinetic model were found to be adequate to fit the experimental results of CODt and CODs, respectively.
Descripción30 Páginas, 6 Figuras, 2 Tablas
Versión del editorhttp://dx.doi.org/10.1016/j.psep.2016.11.014
URIhttp://hdl.handle.net/10261/167469
ISSN0957-5820
E-ISSN1744-3598
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