Bioaugmentation of a two-stage thermophilic (68 degrees C/55 degrees C) anaerobic digestion concept for improvement of the methane yield from cattle manure |
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Authors: | Nielsen Henrik Bangsø Mladenovska Zuzana Ahring Birgitte Kiaer |
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Institution: | Environment and Resources, Building 113, Technical University of Denmark, DK-2800 Lyngby, Denmark. hbn@er.dtu.dk |
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Abstract: | 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. |
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Keywords: | bioaugmentation cattle manure thermophilic two‐stage digestion anaerobic |
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