Production of Peanut Milk and Its Functional, Physiochemical, Nutritional and Sensory Characteristics

Abstract

This study was aimed to investigate the functional properties of peanut seeds, and physicochemical, nutritional and sensory analysis of processed peanut milk. Standard methods were used in this research to determine the functional properties and proximate composition, while minerals were determined by a flame photometer and colorimeter. Firstly, the functional proprieties of the whole and defatted kernel of peanut seeds were studied, and the best results were found in the defatted sample. Peanut milk samples were divided into four samples depends on the percentage of powder milk addition (3, 6, 9 and 12%) as well as the control sample without addition. The pH, total soluble solids, viscosity, and density of samples were (6.2-6.5, 6-16%, 3-8 mPa/s, and 1.01-1.05 g/cm3, respectively), increased with the increasing of milk powder. About the proximate analysis, the highest values of ash, protein, fat, total carbohydrates (0.8, 6.3, 6.3, and 7.5%, respectively) were found in the sample of 12% powder milk. Sodium, potassium, and calcium in the samples (3, 6, 9 and 12%) were found in the range 38-58, 55-89, and 10-18 mg/100 g, respectively. Sensory evaluation results revealed great acceptance for peanut milk made with 3% powder milk addition, while we're not found a significant difference in the color and taste of all samples and control. This study proved the possibility of using Sudanese peanut as a milk substitute which was found to be a good source of nutrients. This study suggested using peanut milk as a milk substitute, and in yogurt manufacture, future work should aim at studying optimum storage conditions and stable packaging requirements.