Bioaugmentation of a two-stage thermophilic (68 degrees C/55 degrees C) anaerobic digestion concept for improvement of the methane yield from cattle manure.
The possibility of improving a two-stage (68 degrees C/55 degrees C) anaerobic digestion concept for treatment of cattle manure was studied. In batch experiments, a 10-24% increase of the specific methane yield from cattle manure and its fractions was obtained, when the substrates were inoculated with bacteria of the genus Caldicellusiruptor and Dictyoglomus. In a reactor experiment inoculation of a 68 degrees C pretreatment reactor with Caldicellusiruptor resulted in a 93% increase in the methane yield of the pretreatment reactor for a period of 18 days, but gave only a slight increase in the overall methane yield of the two-stage setup.
Nielsen
Henrik Bangsø
HB
Environment and Resources, Building 113, Technical University of Denmark, DK-2800 Lyngby, Denmark. hbn@er.dtu.dk
Mladenovska
Zuzana
Z
Ahring
Birgitte Kiaer
BK
D000818:Animals; D001421:Bacteria, Anaerobic / Q000378:metabolism*; D019149:Bioreactors / Q000382:microbiology*; D002417:Cattle; D018929:Cell Culture Techniques / Q000379:methods*; D008372:Manure / Q000382:microbiology*; D008697:Methane / Q000378:metabolism*; D011786:Quality Control; D013696:Temperature
D008372:Manure; D008697:Methane