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. 1978 Apr;35(4):648-54.
doi: 10.1128/aem.35.4.648-654.1978.

Changes in proportions of acetate and carbon dioxide used as methane precursors during the anaerobic digestion of bovine waste

D O Mountfort, R A Asher

Changes in proportions of acetate and carbon dioxide used as methane precursors during the anaerobic digestion of bovine waste

D O Mountfort et al. Appl Environ Microbiol. 1978 Apr.

Abstract

In an anaerobic digestor which was fed daily with bovine waste, during the early stages after feeding (4 to 7 h) acetate (via the methyl group) accounted for almost 90% of the methane produced. As time after feeding increased, acetate declined as a precursor so that in the 12- to 14-h and 21- to 23-h periods, after feeding the methyl group accounted for 80 and 73% of the methane produced, respectively. Measurements of methane production from CO2 reduction showed that in the 2- to 12-h period after feeding, CO2 accounted for 14% of the methane produced, whereas in the 12- to 24-h period it accounted for 27-5%. These results show that the percentages of methane accounted for by acetate and CO2 vary with time after feeding the digestor.

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