title: Oxygen tolerance capacity of upflow anaerobic solid-state (UASS) with anaerobic filter (AF) system.
abstract: In order to investigate the oxygen tolerance capacity of upflow anaerobic solid-state (UASS) with anaerobic filter (AF) system, the effect of microaeration on thermophilic anaerobic digestion of maize straw was investigated under batch conditions and in the UASS with AF system. Aeration intensities of 0-431mL O2/gvs were conducted as pretreatment under batch conditions. Aeration pretreatment obviously enhanced anaerobic digestion and an aeration intensity of 431mL O2/gvs increased the methane yield by 82.2%. Aeration intensities of 0-355mL O2/gvs were conducted in the process liquor circulation of the UASS with AF system. Dissolved oxygen (DO) of UASS and AF reactors kept around 1.39±0.27 and 0.99±0.38mg/L, respectively. pH was relatively stable around 7.11±0.04. Volatile fatty acids and soluble chemical oxygen demand concentration in UASS reactor were higher than those in AF reactor. Methane yield of the whole system was almost stable at 85±7mL/gvs as aeration intensity increased step by step. The UASS with AF system showed good oxygen tolerance capacity.
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China; Department Bioengineering, Leibniz Institute for Agricultural Engineering, Max-Eyth-Allee 100, 14469 Potsdam, Germany. Electronic address: mythuenv@gmail.com.
authors.forename: Yao
authors.initials: Y
authors.lastname: Meng
authors.affiliation: Department Bioengineering, Leibniz Institute for Agricultural Engineering, Max-Eyth-Allee 100, 14469 Potsdam, Germany.
authors.forename: Carsten
authors.initials: C
authors.lastname: Jost
authors.affiliation: UK Biochar Centre, School of GeoSciences, University of Edinburgh, Crew Building, King's Buildings, Edinburgh EH9 3JN, UK.
authors.forename: Jan
authors.initials: J
authors.lastname: Mumme
authors.affiliation: State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China. Electronic address: wkj@tsinghua.edu.cn.
authors.forename: Kaijun
authors.initials: K
authors.lastname: Wang
authors.affiliation: Department Bioengineering, Leibniz Institute for Agricultural Engineering, Max-Eyth-Allee 100, 14469 Potsdam, Germany.
authors.forename: Bernd
authors.initials: B
authors.lastname: Linke
mesh_terms: D000693:Anaerobiosis; D057919:Biological Oxygen Demand Analysis; D005232:Fatty Acids, Volatile; D005374:Filtration / Q000379:methods*; D008697:Methane; D010100:Oxygen
chemical_list: D005232:Fatty Acids, Volatile; D008697:Methane; D010100:Oxygen
keywords: Anaerobic digestion; Maize straw; Microaeration; Oxygen tolerance capacity; Solid-state; UASS