Significance of partial pre-acidification of glucose for methanogenesis in an anaerobic digestion process |
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| Authors: | A. Cohen A. M. Breure D. J. M. Schmedding R. J. Zoetemeyer J. G. van Andel |
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| Affiliation: | (1) Laboratorium voor Microbiologie, Laboratorium voor Chemische Technologie, Universiteit van Amsterdam, Nieuwe Achtergracht 127, NL-1018 WS Amsterdam, The Netherlands;(2) Present address: Invermay Agricultural Research Centre, Private Bag, Mosgiel, New Zealand;(3) Present address: Gist Brocades N.V., P.O. box 1, NL-2600 MA Delft, The Netherlands |
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| Abstract: | Summary The effect of partial pre-acidification of carbohydrate containing wastewaters on anaerobic digester performance was investigated. The influent was a 1% (w/v) glucose solution in a mineral salts medium imposing carbon-limited growth conditions. Up to 13% of the Chemical Oxygen Demand (COD) was added as volatile fatty acids (VFA).In all cases, addition of VFA to the glucose medium resulted in significant increases in the maximum specific COD-conversion rates of the sludge (both with respect to continuous feeding and following a shock loading), as compared with values found on digestion of glucose media alone. |
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