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Homogenization of Cocoa Beans Fermentation to Upgrade Quality Using an Original Improved Fermenter

Authors: Aka S. Koffi, N’Goran Yao, Philippe Bastide, Denis Bruneau, Diby Kadjo

Abstract:

Cocoa beans (Theobroma cocoa L.) are the main components for chocolate manufacturing. The beans must be correctly fermented at first. Traditional process to perform the first fermentation (lactic fermentation) often consists in confining cacao beans using banana leaves or a fermentation basket, both of them leading to a poor product thermal insulation and to an inability to mix the product. Box fermenter reduces this loss by using a wood with large thickness (e>3cm), but mixing to homogenize the product is still hard to perform. Automatic fermenters are not rentable for most of producers. Heat (T>45°C) and acidity produced during the fermentation by microbiology activity of yeasts and bacteria are enabling the emergence of potential flavor and taste of future chocolate. In this study, a cylindro-rotative fermenter (FCR-V1) has been built and coconut fibers were used in its structure to confine heat. An axis of rotation (360°) has been integrated to facilitate the turning and homogenization of beans in the fermenter. This axis permits to put fermenter in a vertical position during the anaerobic alcoholic phase of fermentation, and horizontally during acetic phase to take advantage of the mid height filling. For circulation of air flow during turning in acetic phase, two woven rattan with grid have been made, one for the top and second for the bottom of the fermenter. In order to reduce air flow during acetic phase, two airtight covers are put on each grid cover. The efficiency of the turning by this kind of rotation, coupled with homogenization of the temperature, caused by the horizontal position in the acetic phase of the fermenter, contribute to having a good proportion of well-fermented beans (83.23%). In addition, beans’pH values ranged between 4.5 and 5.5. These values are ideal for enzymatic activity in the production of the aromatic compounds inside beans. The regularity of mass loss during all fermentation makes it possible to predict the drying surface corresponding to the amount being fermented.

Keywords: Cocoa fermentation, fermenter, microbial activity, temperature, turning.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1132573

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References:


[1] L. De Vuyst and S. Weckx, “The cocoa bean fermentation process: from ecosystem analysis to starter culture development,” J. Appl. Microbiol., 2016.
[2] D. H. Ouattara, H. G. Ouattara, B. G. Goualie, L. M. Kouame, and S. L. Niamke, “Biochemical and functional properties of lactic acid bacteria isolated from Ivorian cocoa fermenting beans,” J. Appl. Biosci., vol. 77, pp. 6489–6499, 2014.
[3] M. Barel, Qualité du cacao L’impact du traitement post-récolte. quae, 2013.
[4] R. F. Schwan and A. E. Wheals, “The microbiology of cocoa fermentation and its role in chocolate quality,” Crit. Rev. Food Sci. Nutr., vol. 44, no. 4, pp. 205–221, 2004.
[5] P. Tissot, “La fermentation du Cacao.,” Rev. Bot. Appliquée Agric. Colon, vol. 16, no. 176, pp. 264–276, 1936.
[6] S. S. Thompson, K. B. Miller, and A. S. Lopez, “Cocoa and coffee,” Food Microbiol.Fundam. Front., vol. 3, 2001.
[7] M. Barel, “La fermentation du cacao: le moyen de l’apprécier et de la maitriser,” Ind. Aliment. Agric., vol. 114, no. 4, pp. 211–214, 1997.
[8] E. Afoakwa, J. Kongor, J. Takrama, A. Budu, and others, “Changes in nib acidification and biochemical composition during fermentation of pulp pre-conditioned cocoa (Theobroma cacao) beans.,” Int. Food Res. J., vol. 20, no. 4, pp. 1843–1853, 2013.
[9] B. Biehl, J. Voigt, H. Heinrichs, V. Senjuk, and G. Bytof, “pH-dependent enzymatic formation of oligopeptides and amino acids, the aroma precursors in raw cocoa beans,” in XIth international cocoa research conference. Cocoa Producers Alliance: Yamassoukro, Ivory Coast, 1993, pp. 717–722.
[10] B. Biehl, E. Brunner, D. Passern, V. C. Quesnel, and D. Adomako, “Acidification, proteolysis and flavour potential in fermenting cocoa beans,” J. Sci. Food Agric., vol. 36, no. 7, pp. 583–598, 1985.
[11] J. Vincent, “Influence de différents traitements technologiques sur la fermentation du cacao et le goût du chocolat,” Cafe Cacao, vol. 14, pp. 303–322, 1970.
[12] S. T. Guehi, S. Dabonne, L. Ban-Koffi, D. K. Kedjebo, and G. I. B. Zahouli, “Effect of turning beans and fermentation method on the acidity and physical quality of raw cocoa beans,” Adv. J. Food Sci. Technol., vol. 2, no. 3, pp. 163–171, 2010.
[13] J. Grimaldi, “owu,” Café Cacao Thé, vol. 22, pp. 303–316, 1978.
[14] D. S. Nielsen, “The microbiology of Ghanaian cocoa fermentations,” Københavns Universitet’Københavns Universitet’, LUKKET: 2012 Det Biovidenskabelige Fakultet for Fødevarer, Veterin\a ermedicin og NaturressourcerFaculty of Life Sciences, LUKKET: 2012 Institut for FødevarevidenskabDepartment of Food Science, 2012 Institut for Fødevarevidenskab, 2012 FødevaremikrobiologiDepartment of Food Science, Food Microbiology, 2006.
[15] M. Barel, “Traitement du cacao par fermenteur et séchoir intégrés,” Plant. Rech. Dév., vol. 2, no. 5, pp. 35–42, 1995.
[16] Jean Braudeau, “Etude Scientifique:le Cacaoyer,” 1973.
[17] L. Bankoff, G. Ouattara, T. Karou, S. T. Guehi, J. Nemlin, and J. Diopoh, “Impacts de la fermentation du cacao sur la croissance de la flore microbienne et la qualite des feves marchandes,” Agron. Afr., vol. 25, no. 2, pp. 159–170, 2014.
[18] G. V. de Melo Pereira, K. T. Magalhães, E. G. de Almeida, I. da Silva Coelho, and R. F. Schwan, “Spontaneous cocoa bean fermentation carried out in a novel-design stainless steel tank: Influence on the dynamics of microbial populations and physical–chemical properties,” Int. J. Food Microbiol., vol. 161, no. 2, pp. 121–133, 2013.
[19] M. Apriyanto, E. Harmayani, and others, “Study on effect of fermentation to the quality parameter of cocoa bean in Indonesia,” Asian J. Dairy Food Res., vol. 35, no. 2, pp. 160–163, 2016.
[20] R. U. Hatmi, M. Kobarsih, and N. Cahyaningrum, “Fungi level analysis of cocoa beans based on fermentation box type and duration,” Procedia Food Sci., vol. 3, pp. 371–382, 2015.
[21] S. Hencke, “Utilisation alimentaire des levures,” 2000.
[22] A. Boulal, Z. Benbrahim, B. Benali, and S. Ladjel, “Etude comparative de rendement de la production déthanol de deux variétés de dattes communes de faible valeur commerciale (Tinaceur et Aghmou) de Sud–Ouest de lAlgérie,” Rev. Energ. Renouvelables, vol. 16, no. 3, pp. 539–550, 2013.
[23] W. Albertin et al., “Fermentation rate, population size, CO2 flux and quantitative proteomics: a multi-level approach applied to alcoholic fermentation in Saccharomyces cerevisiae,” in Oeno2011: Actes de colloques du 9e symposium international d’oenologie de Bordeaux, 2012, p. 382.
[24] J. Wollgast and E. Anklam, “Review on polyphenols in Theobroma cacao: changes in composition during the manufacture of chocolate and methodology for identification and quantification,” Food Res. Int., vol. 33, no. 6, pp. 423–447, 2000.