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. 1988 Nov;54(11):2655-9.
doi: 10.1128/aem.54.11.2655-2659.1988.

Fermentation of Insoluble Cellulose by Continuous Cultures of Ruminococcus albus

S G Pavlostathis  1 , T L Miller, M J Wolin
Affiliations

Fermentation of Insoluble Cellulose by Continuous Cultures of Ruminococcus albus

S G Pavlostathis et al. Appl Environ Microbiol. 1988 Nov.

Abstract

The hydrolysis and fermentation of insoluble cellulose (Avicel) by continuous cultures of Ruminococcus albus 7 was studied. An anaerobic continuous culture apparatus was designed which permitted gas collection, continuous feeding, and wasting at different retention times. The operation of the apparatus was controlled by a personal computer. Cellulose destruction ranged from ca. 30 to 70% for hydraulic retention times of 0.5 to 2.0 days. Carbon recovery in products was 92 to 97%, and the oxidation-reduction ratios ranged from 0.91 to 1.15. The total product yield (biomass not included) per gram of cellulose (expressed as glucose) was 0.83 g g, and the ethanol yield was 0.41 g g. The product yield was constant, indicating that product formation was growth linked.

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