title: Identification of synergistic impacts during anaerobic co-digestion of organic wastes.
abstract: Anaerobic co-digestion has been widely investigated, but there is limited analysis of interaction between substrates. The objective of this work was to assess the role of carbohydrates, protein and lipids in co-digestion behaviour separately, and together. Two sets of batch tests were done, each set consisting of the mono-digestion of three substrates, and the co-digestion of seven mixtures. The first was done with pure substrates--cellulose, casein and olive oil--while in the second slaughterhouse waste--paunch, blood and fat--were used as carbohydrate, protein and lipid sources, respectively. Synergistic effects were mainly improvement of process kinetics without a significant change in biodegradability. Kinetics improvement was linked to the mitigation of inhibitory compounds, particularly fats dilution. The exception was co-digestion of paunch with lipids, which resulted in an improved final yield with model based analysis indicating the presence of paunch improved degradability of the fatty feed.
authors: Department of Chemical Engineering, University of Barcelona, C/ Martí i Franquès, No. 1, 6th Floor, 08028 Barcelona, Spain; Advanced Water Management Centre, The University of Queensland, St Lucia, QLD 4072, Australia.
authors: S
authors: S
authors: Astals
authors: Advanced Water Management Centre, The University of Queensland, St Lucia, QLD 4072, Australia.
authors: D J
authors: DJ
authors: Batstone
authors: Department of Chemical Engineering, University of Barcelona, C/ Martí i Franquès, No. 1, 6th Floor, 08028 Barcelona, Spain.
authors: J
authors: J
authors: Mata-Alvarez
authors: Advanced Water Management Centre, The University of Queensland, St Lucia, QLD 4072, Australia. Electronic address: p.jensen@uq.edu.au.
authors: P D
authors: PD
authors: Jensen
mesh_terms: D000003:Abattoirs; D000693:Anaerobiosis; D000818:Animals; D001673:Biodegradation, Environmental; D002417:Cattle; D008055:Lipids / Q000032:analysis; D008697:Methane; D009930:Organic Chemicals / Q000302:isolation & purification*; D012037:Refuse Disposal / Q000379:methods*; D014866:Waste Products / Q000032:analysis*
chemical_list: D008055:Lipids; D009930:Organic Chemicals; D014866:Waste Products; D008697:Methane
keywords: Anaerobic digestion; Codigestion; LCFA inhibition; Modelling; Slaughterhouse