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Preservation of coffee pulp by ensilage: Influence of biological additives

Conservation de la pulpe de café par ensilage: Influence des additifs biologiques

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Advances in Solid State Fermentation

Summary

Data on the influence of three biological additives on the ensilage of coffee pulp for its preservation show that the endogenous microflora of the coffee pulp is efficient enough to produce good quality silage, with acceptable levels of organic acid, dry matter loss and final pH. The use of inoculants, as biological additives, showed the efficiency of natural microflora grown on coffee pulp and the monoculture of Lactobacillus plantarum A6 in improving the physico-chemical characteristics of the silage, though commercial inoculum was not efficient, due to several reasons. Degradation of caffeine was absent i n all the cases. Cellulases as a biological additive showed increased sugar production during ensilage. The results on the kinetics of different microflora development and physico-chemical characteristics during ensilage provide the insight into the microbiology and physiology of the process and point out a number of possibilities for improving the ensilage process as well as the quality of the silage.

Resume

La microflore lactique endogène de la pulpe de café séchée au soleil est suffisante pour amorcer un ensilage présentant des caractéristiques physico-chimiques finales acceptables. Cependant, l’apport de differents ferments biologiques (un pied de cuve de pulpe de café ensilée naturellement; un ferment monosouche (Lactobacillus plantarum A6); un ferment commercial DpH4 (associant deux souches de bactéries lactiques à un complexe enzymatique) permet d’améliorer la qualité des ensilages: homogénéité de la population microbienne, augmentation du taux d’acide lactique, pas de production d’AGV indésirables ni d’éthanol. La présence de cellulases permet d’augmenter le taux de sucres reducteurs. Les suivis du développement des microflores et les résultats physico-chimiques obtenus au cours des ensilages démontrent une conservation rapide de la pulpe de café par acidification sans perte importante de matière sèche. L’ensilage est un bon procédé de conservation de la pulpe de café humide. La caféine n’a pas été dégradée dans tous les cas.

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© 1997 Springer Science+Business Media Dordrecht

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Perraud-Gaime, I., Roussos, S. (1997). Preservation of coffee pulp by ensilage: Influence of biological additives. In: Roussos, S., Lonsane, B.K., Raimbault, M., Viniegra-Gonzalez, G. (eds) Advances in Solid State Fermentation. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-0661-2_16

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  • DOI: https://doi.org/10.1007/978-94-017-0661-2_16

  • Publisher Name: Springer, Dordrecht

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