Abstract:
To formulate and determine the appropriate conditions for the processing of non-dairy imitation beverage from broken rice. Three varieties of broken rice with different amylose content: Khao Dawk Mali 105, Khao Ta Heang 17 and RD 25 were used. The ratio (by weight) of rice flour to water, preheated treatment of the slurry, % by weight for sugar and soybean oil for each variety of rice, the conditions for homogenization and pasteurization were studied and evaluated by pH, viscosity, Total Soluble Solid and sensory test as well. The results indicated that the product from Khao Dawk Mali 105 rice with ratio of flour : water = 1:14 (w/w) preheated at 65 ํC 3 mins, 2.5% sugar and 3.0% soy bean oil (by weight) gave the best acceptance. Homogenization at 4 bar for 1 cycle followed by 1 bar for 1 cycle was sufficient for the approvement of colloidal stability and provided good mouth feel. Pasteurization at 65 ํC for 15 minutes was adequate for the product to be considered as standard pasteurized milk (< 50,000 colony/ml). 3% by weight of Sodium caseinate was found to be used to improve product's nutritive value. The product was stabilized by RECODAN-RS VEG (consists of mono-diglycerides of fatty acids, sodium alginate, carrageenan and guar gum) at 0.18% (by weight). The physical and chemical characteristics of the product are shown as follow; pH = 6.97+_0.01, %TAA = 0.018, viscosity = 15.01+_0.03 cps. at 27 ํC and TSS = 9 ํBrix provided 87.50% moisture, 2.79% protein, 2.28% fat, 0.38% ash, 0.18% fiber and 6.84% carbohydrate. This product may be flavored as strawberry with addition of FD&C Red No.3 0.3 g/500ml. Both natural and flavored rice milk were found to stand for 5 days in the refrigerator in view of bacterial standard and good consumption.