title: Hydrolysis and composition of recovered fibres fractionated from solid recovered fuel.
abstract: Fibres fractionated from solid recovered fuel (SRF), a standardised market combustion fuel produced from sorted waste, were considered as a source of lignocellulosic fermentable sugars. The fibre yield from four samples of SRF was 25-45%, and the separated material consisted of 52-54% carbohydrates, mainly glucan, with a high content of ash (12-17%). The enzymatic digestibility of recovered fibres was studied at low and high solids loading and compared with model substrates containing only chemical and mechanical pulps. Above 80% hydrolysis yield was reached at 20% solids loading in 48 h, but variation was observed between different samples of recovered fibres. Surfactants were found to improve the hydrolysis yield of recovered fibres especially in tumbling-type of mixing at low solids loading, where hydrolysis was found to stagnate without surfactants. The results suggest that SRF is a potential source of easily digestible lignocellulosic carbohydrates for use in biorefineries.
authors.affiliation: VTT Technical Research Centre of Finland, P.O. Box 1000, 02044 VTT, Finland. Electronic address: katariina.kemppainen@vtt.fi.
authors.forename: K
authors.initials: K
authors.lastname: Kemppainen
authors.affiliation: VTT Technical Research Centre of Finland, P.O. Box 1000, 02044 VTT, Finland.
authors.forename: M
authors.initials: M
authors.lastname: Siika-Aho
authors.affiliation: Skandinavisk Kemiinformation AB, Birkagatan 35, 11339 Stockholm, Sweden.
authors.forename: A
authors.initials: A
authors.lastname: Östman
authors.affiliation: Pöyry Management Consulting Oy, Jaakonkatu 3, 01620 Vantaa, Finland.
authors.forename: E
authors.initials: E
authors.lastname: Sipilä
authors.affiliation: Roal Oy, Tykkimäentie 15, 05200 Rajamäki, Finland.
authors.forename: T
authors.initials: T
authors.lastname: Puranen
authors.affiliation: VTT Technical Research Centre of Finland, P.O. Box 1000, 02044 VTT, Finland.
authors.forename: N
authors.initials: N
authors.lastname: von Weymarn
authors.affiliation: VTT Technical Research Centre of Finland, P.O. Box 1000, 02044 VTT, Finland.
authors.forename: K
authors.initials: K
authors.lastname: Kruus
mesh_terms: D056804:Biofuels; D005591:Chemical Fractionation / Q000379:methods*; D006868:Hydrolysis; D010209:Paper; D013314:Stress, Mechanical; D013501:Surface-Active Agents / Q000737:chemistry; D013696:Temperature; D001617:beta-Glucosidase / Q000378:metabolism
chemical_list: D056804:Biofuels; D013501:Surface-Active Agents; D001617:beta-Glucosidase
keywords: Enzymatic hydrolysis; High solids loading; Recovered fibres; Solid recovered fuel; Surfactants