Potentials and Pitfalls on the Use of Passion Fruit By-Products in Drinkable Yogurt: Physicochemical, Technological, Microbiological, and Sensory Aspects
Nataly Maria Viva de Toledo,
Adriano Costa de Camargo,
Paula Bortolotto Mendes Ramos,
David Charles Button,
Daniel Granato,
Solange Guidolin Canniatti-Brazaca
Affiliations
Nataly Maria Viva de Toledo
Department of Agri-Food Industry, Food and Nutrition, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Av. Pádua Dias 11, P.O. Box 9, CEP 13418-900 Piracicaba, SP, Brazil
Adriano Costa de Camargo
Department of Agri-Food Industry, Food and Nutrition, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Av. Pádua Dias 11, P.O. Box 9, CEP 13418-900 Piracicaba, SP, Brazil
Paula Bortolotto Mendes Ramos
Department of Agri-Food Industry, Food and Nutrition, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Av. Pádua Dias 11, P.O. Box 9, CEP 13418-900 Piracicaba, SP, Brazil
David Charles Button
Department of Agri-Food Industry, Food and Nutrition, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Av. Pádua Dias 11, P.O. Box 9, CEP 13418-900 Piracicaba, SP, Brazil
Daniel Granato
Department of Food Engineering, State University of Ponta Grossa, Av. Bonifácio Viléla, Centro, CEP 84010-330 Ponta Grossa, PR, Brazil
Solange Guidolin Canniatti-Brazaca
Department of Agri-Food Industry, Food and Nutrition, “Luiz de Queiroz” College of Agriculture, University of São Paulo, Av. Pádua Dias 11, P.O. Box 9, CEP 13418-900 Piracicaba, SP, Brazil
Peels and seeds are the primary by-products of the passion fruit agroindustry. This study was designed to evaluate the potential of passion fruit peel and seeds flour (PFF) as a source of fiber and minerals to enhance the functional properties of drinkable yogurt. Proximate composition, mineral content, technological (pH, viscosity, color, and syneresis), and microbiological analyses (lactic acid bacteria, as well as yeast and mold counts), acceptance test, descriptive sensory analysis, and shelf life assessments were analyzed. Drinkable yogurts fortified with PFF showed higher fiber levels (both soluble and insoluble) and mineral content (potassium, magnesium, and manganese). Incorporation of PFF increased the viscosity and promoted changes in the color parameters of yogurts. During storage, the pH and the number of viable lactic acid bacteria decreased while the syneresis and yeast and mold counts increased. The shelf life of drinkable yogurts was estimated to be 21 days. Regarding sensorial aspects, drinkable yogurt fortified with 2% of PFF was considered the most viable product for market exploitation. The present contribution indicates that the use of passion fruit by-products in the development of drinkable yogurts is a viable alternative which can be explored for nutritional, technological, and sensory purposes by the food industry.
