Abstract
Beer fermentations carried out in a cylindrical pilot plant fermenter were used to study mixing characteristics and the mechanisms of homogenization during beer fermentation. The evolution of different parameters (pH, dry weight, sugars and ethanol concentration) were monitored at different heights within the fermenter, which was inoculated in its upper part. The degree of mixture or homogeneity, was correlated throughout the fermentation process, with the mixing power, defined in terms of CO2 production rate. In the final model obtained, the influence of solids evolution on the mixing bulk was also taken into account.
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Bird, R. B.; Stewart, W. E.; Lightfoot, E. N.: Transport Phenomena, John Wiley, 1960, p. 59
Delente, J.; Cavit, A.; Krabbe, E.; Ladenburg, K.: Carbon dioxide in fermenting beer. Part II. MBAA Techn. Quart, 5. 4 (1968) 228–234
Renger, R. S.; Luyben, K. Ch. A. M.: Fluid dynamics of beer fermentation. Second International Conference on Reactor Fluid Dynamic. Cambridge, 1988, p. 277–298
Borkmann, K.; Manger, H. J.: Die Lebensmittel-Industrie. 22 (1975) 501–508
Vrieling, A. M.: Agitated fermentation in high fermenters. EBC Monograph V. Zoeterwoude, 1978, p. 135–144.
García, A. I.; García, L. A.; Díaz, M.: Mixing in unstirred batch fermenters. The Biochem. Eng. J. 51 (1993) B57–B61
García A. I.: Ph.D. Thesis. Dep. of Chem. Eng., U. of Oviedo. Oviedo, Spain, 1992
Smoluchowski, M.: Versuch einer mathematischen Theorie der koagulatioskinetischenc kolloidalon Lösungen. Z. Physic. Chem. 92, (1918) 129–168
Miki, B. L. A.; Poon, L. H.; James, A. R.; Seligy, V. L.: Possible mechanism for flocculation interactions in Saccharomyces cerevisiae. J. Bacteriol., 150 (1982) 879–889
Binns, F.; Ensov, R. J.; Macpherson, A. L.: J. Sci. Food Agric. 29 (1978) 71
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Two of the authors (A.I.G. and S.S.P.) were the recipient of a predoctoral fellowship from the “FICXT”.
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García, A.I., Pandiella, S.S., García, L.A. et al. Mechanism for mixing and homogenization in beer fermentation. Bioprocess Engineering 10, 179–184 (1994). https://doi.org/10.1007/BF00387527
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DOI: https://doi.org/10.1007/BF00387527