title: Biochemical methane potential and anaerobic biodegradability of non-herbaceous and herbaceous phytomass in biogas production.
abstract: The suitability of municipal plant waste for anaerobic digestion was examined using 57 different herbaceous and non-herbaceous samples. Biochemical methane potential (BMP) and anaerobic biodegradability were related to the degree of lignification and crystallinity of cellulose. The BMP of herbaceous garden plants (332.7 CH(4)NL kg VS(-1)) was high, although lower than that of energy crops (400-475 CH(4)NL kg VS(-1)). Herbaceous wild plants from natural grassland contained most lignocelluloses, leading to relatively low BMP (214.0 CH(4)NL kg VS(-1)). Non-herbaceous phytomass had a high degree of lignification and a high concentration of crystalline cellulose, but due to the content of non-woody parts with a low concentration of lignocellulose the BMP was relatively high, 199.9 and 172.0 CH(4)NL kg VS(-1) for hedge cuttings and woody cuttings, respectively. There were indications that a plant lignin concentration of 100 g kg VS(-1) is the critical biodegradability point in anaerobic digestion of phytomass.
authors.affiliation: Institute of Chem. Eng., Biotechnology and Environmental Tech., Faculty of Engineering, University of Southern Denmark, Niels Bohrs Allé 1, DK-5230 Odense M, Denmark. jmt@kbm.sdu.dk
authors.forename: Jin M
authors.initials: JM
authors.lastname: Triolo
authors.forename: Lene
authors.initials: L
authors.lastname: Pedersen
authors.forename: Haiyan
authors.initials: H
authors.lastname: Qu
authors.forename: Sven G
authors.initials: SG
authors.lastname: Sommer
mesh_terms: D001421:Bacteria, Anaerobic / Q000378:metabolism*; D056804:Biofuels / Q000382:microbiology*; D005240:Feasibility Studies; D008031:Lignin / Q000378:metabolism*; D008697:Methane / Q000302:isolation & purification / Q000378:metabolism*; D006109:Poaceae / Q000378:metabolism* / Q000382:microbiology*; D012037:Refuse Disposal / Q000379:methods
chemical_list: D056804:Biofuels; C036909:lignocellulose; D008031:Lignin; D008697:Methane