Desenvolvimento, caracterização e otimização de bebida fermentada simbiótica de soja com farinha de banana verde

Abstract

This work was conducted with the objective of developing and evaluate the physico-chemical, sensory and microbiological quality of fermented beverages by probiotic microorganisms, with water-soluble extract of soybean powder (8, 10, 12%), and 0, 2, 3 and 4 % addition of green banana flour powder, and 12% of sucrose in all formulations, proposing a good development of total lactic acid bacteria , through the investigation of the influence of two variables (different percentages of soy and banana flour) on the total of lactic acid bacteria count , and the physical and chemical aspects, and the sensory acceptance as well. Twelve treatments were developed. Fermented beverages of soybeans were evaluated at pH, lactic acid acidity, moisture, ash, lipids, protein, total carbohydrates, dietary fiber, water activity, fixed mineral residue, enumeration of lactic acid bacteria, total coliform count( 35° C and 45° C), yeast and mould count, sensory acceptance (hedonic scale of nine points). The results were submitted to ANOVA and Tukey test (the significance level 5. The data obtained, showed that the percentage of water-soluble soybean extract influenced in the total count of lactic acid bacteria, mainly in 10 treatments added with this ingredient. The same occurred in the treatments with addition of 1%, 2%, 3% of banana flour powde. Under the microbiological point of view, all samples were able to be consumed, according to the current legislation, during 35 days of storage. The treatment with 10% of soy extract and 3% of banana flour, presented the best results in teh microbiological count of lactic acid bacteria, however when optimized, the behavior were equal among all treatments, changing only the threshold count. Soy has sensory features that limit it´s consumption, as the beany taste and aroma, due to the action of the lipoxigenases enzymes, however, the products developed, in this study, presented a satisfactory acceptability.