title: Thermo- and mesophilic anaerobic digestion of wheat straw by the upflow anaerobic solid-state (UASS) process.
abstract: In this experimental work, the feasibility of wheat straw as a feedstock for biogas production is investigated using the newly developed upflow anaerobic solid-state (UASS) process. With the analytical emphasis placed on methane and metabolite production, both mesophilic and thermophilic 39 L UASS reactors were operated for 218 days at an organic loading rate of 2.5 g(VS)L(-1)d(-1) using wheat straw as sole substrate. For improved methanization of soluble metabolites, each UASS reactor was connected to an individual 30 L anaerobic filter (AF). During steady state thermophilic straw digestion was found to have a 36% higher methane yield (0.165 L g(VS)(-1)) whereas the hydrolysis rate constant increased by 106% (0.066 d(-1)).
authors.affiliation: Leibniz Institute for Agricultural Engineering Potsdam-Bornim, Potsdam, Germany. mpohl@atb-potsdam.de
authors.forename: Marcel
authors.initials: M
authors.lastname: Pohl
authors.forename: Jan
authors.initials: J
authors.lastname: Mumme
authors.forename: Kathrin
authors.initials: K
authors.lastname: Heeg
authors.forename: Edith
authors.initials: E
authors.lastname: Nettmann
mesh_terms: D000693:Anaerobiosis; D056804:Biofuels; D005240:Feasibility Studies; D005374:Filtration; D013696:Temperature; D014908:Triticum / Q000378:metabolism*
chemical_list: D056804:Biofuels