Development of Integrated Value-Added Products from Low-Grade Namwa Bananas
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Abstract
This study aimed to investigate the production process of cold-extracted syrup from low-grade Namwa bananas, and to develop chewy banana products from the residues remaining after syrup fermentation using solar drying technology. Three fermentation methods were compared: longitudinally sliced bananas, round-cut banana slices, and whole bananas, with a fermentation period of four weeks at 4–5°C. The syrup was evaluated for color (L*, a*, b*), viscosity, pH, and total soluble solids (°Brix). Sensory evaluation of color, aroma, taste, texture, and overall acceptability was conducted using a
5-point hedonic scale with 30 panelists. The experiment was arranged in a Randomized Complete Block Design (RCBD), and data were analyzed using ANOVA and Duncan’s New Multiple Range Test (DMRT) at a 95% confidence level.
1) Different fermentation methods had no significant effects on viscosity, pH, and total soluble solids (°Brix) (p > 0.05). Syrup produced from round-cut banana slices coated with granulated sugar exhibited the highest L* value, while a* and b* values were not significantly different. Sensory evaluation showed significant differences in taste and texture, with round-cut banana slices receiving the highest scores, whereas color, aroma, and overall acceptability were not significantly different
(p > 0.05). Therefore, this method was selected for further development of cold-extracted syrup.
2) Banana residues remaining after syrup fermentation were processed into chewy bananas using a Parabola Dome Solar Dryer. Drying treatments had no significant effects on L*, a*, and b* values (p > 0.05). Bananas dried for 4 h exhibited the highest adhesiveness and received the highest preference scores for color, texture, and overall acceptability (p ≤ 0.05), while aroma and taste were not significantly different (p > 0.05). These results demonstrate the potential of low-grade Namwa bananas for producing value-added cold-extracted syrup and chewy banana products.
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