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A kinetic model for methanogenesis of acetic acid in a multireactor system
Author(s) -
Bhadra Amit,
Mukhopadhyay S. N.,
Ghose T. K.
Publication year - 1984
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.260260310
Subject(s) - methanogenesis , acetic acid , chemistry , kinetic energy , biochemistry , biochemical engineering , organic chemistry , methane , physics , engineering , quantum mechanics
Bioconversion of acetic acid to methane by a crude culture of methanogens in a continuous multireactor system was investigated. Culture of methanogens was drawn from an active cow‐dung digester (12 days) and was grown in a semisynthetic medium (pH 6.3, 37°C) with acetic acid as the sole carbon source. The solubilities of CO 2 , HCO 3 − , and CO 3 2− increased with the rise in pH and exercised considerable influence on the gas composition. Various mechanisms for methanogenesis of acetic acid based on the available pathways were considered. Experimental data were compared with these mechanisms, the best fit was determined, and the corresponding rate expression was identified. This mechanism predicted that, of the total methane produced, 72%;comes from acetic acid directly and 28%;via the CO 2 reduction route.