title: Anaerobic digestion of horse dung mixed with different bedding materials in an upflow solid-state (UASS) reactor at mesophilic conditions.
abstract: Aim of this study was to investigate the use of upflow anaerobic solid-state (UASS) digestion for treating horse manure. Biochemical methane potential (BMP) tests conducted for varying mixtures of dung (hay and silage feed) and bedding material (wheat straw, flax, hemp, wood chips) showed that straw mixed with hay horse dung has the highest potential of [Formula: see text] . Continuous mesophilic digestion was conducted for 238 days using a single-stage UASS reactor (27 L) and a two-stage UASS system with an anaerobic filter (AF, 21 L). Increasing the organic loading rate (OLR) from 2.5 to 4.5 g vs L(-1)d(-1) enhanced the methane rate of the single-stage reactor from 0.262 to 0.391 LL(-1)d(-1) while the methane yield declined from 104.8 to 86.9 L kg vs(-1). The two-stage system showed similar yields. Thus, for solid-state digestion of horse manure a single-stage UASS reactor appears sufficient.
authors.affiliation: Faculty of Agricultural Sciences, Department of Animal Sciences, Division Process Engineering, Georg-August-University of Göttingen, Universitaetsstraße 7, 49377 Vechta, Germany. Electronic address: jboeske@gwdg.de.
authors.forename: Janina
authors.initials: J
authors.lastname: Böske
authors.affiliation: Leibniz Institute for Agricultural Engineering Potsdam-Bornim, Max-Eyth-Allee 100, 14469 Potsdam, Germany.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Wirth
authors.affiliation: Faculty of Agricultural Sciences, Department of Animal Sciences, Division Process Engineering, Georg-August-University of Göttingen, Universitaetsstraße 7, 49377 Vechta, Germany.
authors.forename: Felix
authors.initials: F
authors.lastname: Garlipp
authors.affiliation: Leibniz Institute for Agricultural Engineering Potsdam-Bornim, Max-Eyth-Allee 100, 14469 Potsdam, Germany.
authors.forename: Jan
authors.initials: J
authors.lastname: Mumme
authors.affiliation: Faculty of Agricultural Sciences, Department of Animal Sciences, Division Process Engineering, Georg-August-University of Göttingen, Universitaetsstraße 7, 49377 Vechta, Germany.
authors.forename: Herman
authors.initials: H
authors.lastname: Van den Weghe
mesh_terms: D000693:Anaerobiosis; D000818:Animals; D019149:Bioreactors; D006736:Horses; D008372:Manure; D008697:Methane / Q000378:metabolism
chemical_list: D008372:Manure; D008697:Methane
keywords: Anaerobic digestion; Horse manure; Methane; Solid-state; UASS