title: Effect of alkaline pretreatment on anaerobic digestion of olive mill solid waste.
abstract: The present study evaluates the influence of alkaline (NaOH) pretreatment on anaerobic digestion of olive pomace. Batch hydrolysis experiments with different NaOH dosages, process durations and temperatures were conducted, in which the variation of olive pomace solubilization in the liquid phase was investigated. The effect of pretreatment on anaerobic digestion was studied through biochemical methane potential assays. The results demonstrated the effectiveness of the NaOH pretreatment in improving olive pomace solubilization as well as its biodegradability. Maximum specific methane yields were achieved at different NaOH dosages depending on the pretreatment temperature. Consequently, it was concluded that the two operating parameters of the pretreatment stage (NaOH dosage and temperature) may exert a joint effect on substrate biodegradability and methane yields. The highest methane yield (242NmLCH4/gVS) was obtained for the material pretreated at 90°C, at a dosage of 1mmol/gVS (4% of VS).
authors: School of Environmental Engineering, Technical University of Crete, Politechnioupolis, 73100 Chania, Greece. Electronic address: fpellera@isc.tuc.gr.
authors: Frantseska-Maria
authors: FM
authors: Pellera
authors: Department of Civil and Environmental Engineering, University of Rome "La Sapienza", Via Eudossiana, 18, 00184 Rome, Italy.
authors: Sofia
authors: S
authors: Santori
authors: Department of Civil and Environmental Engineering, University of Rome "La Sapienza", Via Eudossiana, 18, 00184 Rome, Italy. Electronic address: raffaella.pomi@uniroma1.it.
authors: Raffaella
authors: R
authors: Pomi
authors: Department of Civil and Environmental Engineering, University of Rome "La Sapienza", Via Eudossiana, 18, 00184 Rome, Italy. Electronic address: alessandra.polettini@uniroma1.it.
authors: Alessandra
authors: A
authors: Polettini
authors: School of Environmental Engineering, Technical University of Crete, Politechnioupolis, 73100 Chania, Greece. Electronic address: gidarako@mred.tuc.gr.
authors: Evangelos
authors: E
authors: Gidarakos
mesh_terms: D000693:Anaerobiosis; D001673:Biodegradation, Environmental; D057919:Biological Oxygen Demand Analysis; D005525:Food-Processing Industry; D006863:Hydrogen-Ion Concentration; D007700:Kinetics; D008031:Lignin / Q000737:chemistry / Q000378:metabolism; D008697:Methane / Q000378:metabolism; D008962:Models, Theoretical; D031658:Olea / Q000737:chemistry*; D012972:Sodium Hydroxide / Q000737:chemistry; D062611:Solid Waste; D012995:Solubility; D013696:Temperature; D014865:Waste Disposal, Fluid / Q000379:methods*
chemical_list: D062611:Solid Waste; C036909:lignocellulose; D012972:Sodium Hydroxide; D008031:Lignin; D008697:Methane
keywords: Agroindustrial; Anaerobic digestion; Chemical; Lignocellulosic; Olive; Pretreatment