Summary
Fermentation of straw by anaerobic mixed cultures coming from different biotopes was studied. The influence of pretreatments by alkali and by cellulases has been estimated using both gas chromatography and microcalorimetry. It was shown that pretreatment with caused a four-fold cheap alkali increase in the quantity of barley straw fermented by all the mixed cultures studied. Pretreatment with cellulases is also effective and the effects of both forms of pretreatment are additive. In this way it has been possible to increase straw fermentation by a factor of 6. It was demonstrated that it is mainly the hemicelluloses of the straw which are fermented and that cellulose is poorly degraded. The influences of the inoculum and of endogenous flora have also been considered.
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Partos, J., Fardeau, ML. & Belaich, JP. Influence of pretreatments on the fermentation of barley straw by undefined mixed bacterial populations. European J. Appl. Microbiol. Biotechnol. 18, 308–314 (1983). https://doi.org/10.1007/BF00500497
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DOI: https://doi.org/10.1007/BF00500497