title: Thermophilic co-digestion of cattle manure and food waste supplemented with crude glycerin in induced bed reactor (IBR).
abstract: The aim of the present research work was to boost biogas production from cattle manure (CM) by adding food waste (FW) and crude glycerin (Gly) from the biodiesel industry as co-substrates. For this purpose, different quantities of FW and Gly were added to CM and co-digested in an induced bed reactor (IBR) at 55 °C. Sonication pre-treatment was implemented in the CM+Gly mixture, applying 550 kJ/kg TS to enhance the biodegradability of these co-substrates. The best results were obtained with mixtures of 87/10/3 (CM/FW/Gly) (w/w) operating at an organic loading rate of 7 g COD/L day, obtaining 92% COD removal, a specific methane yield of 640 L CH4/kg VS and a methane production rate of 2.6L CH4/L day. These results doubled those obtained in the co-digestion of CM and FW without the addition of Gly (330 L CH4/kg VS and 1.2L CH4/L day).
authors.affiliation: Chemical Engineering and Environmental Technology Department, University Technology Institute of Asturias (IUTA), University of Oviedo, Campus of Gijón, 33203 Gijón, Spain.
authors.forename: L
authors.initials: L
authors.lastname: Castrillón
authors.forename: E
authors.initials: E
authors.lastname: Marañón
authors.forename: Y
authors.initials: Y
authors.lastname: Fernández-Nava
authors.forename: P
authors.initials: P
authors.lastname: Ormaechea
authors.forename: G
authors.initials: G
authors.lastname: Quiroga
mesh_terms: D000818:Animals; D001673:Biodegradation, Environmental / Q000187:drug effects; D019149:Bioreactors; D001709:Biotechnology / Q000295:instrumentation* / Q000379:methods*; D002417:Cattle; D005502:Food; D005990:Glycerol / Q000494:pharmacology*; D008372:Manure / Q000032:analysis* / Q000382:microbiology; D008697:Methane / Q000378:metabolism; D013696:Temperature; D014865:Waste Disposal, Fluid; D014866:Waste Products / Q000032:analysis*
chemical_list: D008372:Manure; D014866:Waste Products; D008697:Methane; D005990:Glycerol