title: Comment on "Synergistic co-digestion of solid-organic-waste and municipal-sewage-sludge: 1 plus 1 equals more than 2 in terms of biogas production and solids reduction" [Water Research 87, 416-423].
abstract: Co-digestion of organic waste and sewage sludge enhances biogas production and reduces the mass of remaining solids. This phenomenon of enhanced organic matter decomposition by adding labile substrate is known from other habitats like soils and sediments where it is called priming effect. It is thus suggested to adopt the term priming effect also in environmental biotechnology, and in particular for biomethanisation of wastewater sludges by the addition of energy-rich co-substrates.
authors.affiliation: Institute of Microbiology, University of Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria. Electronic address: heribert.insam@uibk.ac.at.
authors.forename: Heribert
authors.initials: H
authors.lastname: Insam
authors.affiliation: Institute of Microbiology, University of Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria.
authors.forename: Rudolf
authors.initials: R
authors.lastname: Markt
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D019149:Bioreactors; D008697:Methane; D012722:Sewage / Q000737:chemistry*; D062611:Solid Waste; D014867:Water
chemical_list: D056804:Biofuels; D012722:Sewage; D062611:Solid Waste; D014867:Water; D008697:Methane