title: Enhancement of anaerobic digestion efficiency of wastewater sludge and olive waste: Synergistic effect of co-digestion and ultrasonic/microwave sludge pre-treatment.
abstract: This study investigates the effect of ultrasonic and microwave pre-treatment on biogas production from the anaerobic co-digestion of olive pomace and wastewater sludges. It was found that co-digestion of wastewater sludge with olive pomace yielded around 0.21 L CH4/g VS added, whereas the maximum methane yields from the mono-digestion of olive pomace and un-pretreated wastewater sludges were 0.18 and 0.16L CH4/g VS added. In the same way, compared to mono-digestion of these substrates, co-digestion increased methane production by 17-31%. The microwave and ultrasonic pre-treatments applied to sludge samples prior to co-digestion process led to further increase in the methane production by 52% and 24%, respectively, compared to co-digestion with un-pretreated wastewater sludge. The highest biogas and methane yields were obtained from the co-digestion of 30 min microwave pre-treated wastewater sludges and olive pomace to be 0.46 L/g VS added and 0.32 L CH4/g VS added, respectively.
authors: Bogazici University, Institute of Environmental Sciences, 34342, Bebek, Istanbul, Turkey. Electronic address: aylin.zeren@boun.edu.tr.
authors: B Aylin
authors: BA
authors: Alagöz
authors: Bogazici University, Institute of Environmental Sciences, 34342, Bebek, Istanbul, Turkey.
authors: Orhan
authors: O
authors: Yenigün
authors: Bogazici University, Institute of Environmental Sciences, 34342, Bebek, Istanbul, Turkey.
authors: Ayşen
authors: A
authors: Erdinçler
mesh_terms: D056804:Biofuels / Q000032:analysis*; D007220:Industrial Waste / Q000032:analysis; D008697:Methane / Q000032:analysis*; D008872:Microwaves; D000069463:Olive Oil / Q000032:analysis; D012722:Sewage / Q000032:analysis*; D000069453:Ultrasonic Waves; D014865:Waste Disposal, Fluid / Q000379:methods*; D062065:Wastewater / Q000032:analysis
chemical_list: D056804:Biofuels; D007220:Industrial Waste; D008697:Methane; D000069463:Olive Oil; D012722:Sewage; D062065:Wastewater
keywords: Anaerobic co-digestion; Biogas production; Microwave pre-treatment; Olive pomace; Sludge disintegration; Ultrasonic pretreatment