1. Effect of alkaline pretreatment on anaerobic digestion of olive mill solid waste
- Author
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Alessandra Polettini, Sofia Santori, Raffaella Pomi, Evangelos Gidarakos, and Frantseska Maria Pellera
- Subjects
anaerobic digestion ,Municipal solid waste ,chemical ,020209 energy ,agroindustrial ,Chemical ,02 engineering and technology ,010501 environmental sciences ,Solid Waste ,01 natural sciences ,Lignin ,Waste Disposal, Fluid ,Methane ,Hydrolysis ,chemistry.chemical_compound ,Anaerobic digestion ,Olea ,0202 electrical engineering, electronic engineering, information engineering ,Olive ,lignocellulosic ,pretreatment ,Sodium Hydroxide ,Anaerobiosis ,Food-Processing Industry ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Biological Oxygen Demand Analysis ,Chromatography ,Waste management ,Chemistry ,Pomace ,Temperature ,Substrate (chemistry) ,Biodegradation ,Hydrogen-Ion Concentration ,Models, Theoretical ,Lignocellulosic ,Agroindustrial ,stomatognathic diseases ,Kinetics ,Biodegradation, Environmental ,Solubility ,Solubilization ,Pretreatment - Abstract
Summarization: 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 (242 NmL CH4/gVS) was obtained for the material pretreated at 90 °C, at a dosage of 1 mmol/gVS (4% of VS). Presented on: Waste Management
- Published
- 2016