Kinetics of biogas production in Anaerobic Filters.
This study investigates methane production kinetics from individual volatile fatty acids (VFA) in an Upflow Anaerobic Filter (AF). 1gCOD in the form of acetic (HAc), propionic (HPr) or butyric acid (HBu) was injected into the AF while operating at an organic loading rate (OLRCOD) of 3.5gL(-1)d(-1). A new method is introduced to separate gas production of the baseload from the product formation of VFA degradation after the injection. The lag phase, fractional rate of gas production and half-life has been determined for the methane production of the three VFAs. The half-lives were in the order HAc<HBu<HPr showing a slower gas production from the C3 acid than from the C4 acid. The results can be used for prediction models for on-demand biogas production, a vital approach that provides the transforming energy market with balancing power.
State Institute for Agricultural Engineering and Bioenergy, University of Hohenheim, Garbenstraße 9, 70599 Stuttgart, Germany. Electronic address: j.kruempel@uni-hohenheim.de.
Johannes
J
Krümpel
Goethe Center for Scientific Computing, Goethe University, Kettenhofweg 139, 60325 Frankfurt am Main, Germany.
Friedrich
F
Schäufele
Goethe Center for Scientific Computing, Goethe University, Kettenhofweg 139, 60325 Frankfurt am Main, Germany.
Johannes
J
Schneider
Institute for Agricultural Engineering, University of Hohenheim, Garbenstraße 9, 70599 Stuttgart, Germany.
Thomas
T
Jungbluth
State Institute for Agricultural Engineering and Bioenergy, University of Hohenheim, Garbenstraße 9, 70599 Stuttgart, Germany.
Simon
S
Zielonka
State Institute for Agricultural Engineering and Bioenergy, University of Hohenheim, Garbenstraße 9, 70599 Stuttgart, Germany.
Andreas
A
Lemmer
D000693:Anaerobiosis; D056804:Biofuels; D019149:Bioreactors; D005232:Fatty Acids, Volatile / Q000378:metabolism*; D007700:Kinetics; D008697:Methane / Q000032:analysis* / Q000378:metabolism*
D056804:Biofuels; D005232:Fatty Acids, Volatile; D008697:Methane
Anaerobic digestion; Kinetic; On demand; Two-staged; Volatile fatty acid