Utilization of Pineapple Waste for Frozen Pineapple Concentrate

Abstract

Utilization of pineapple waste from canning industry for the production of frozen pineapple juice concentrate was studied. It was found that about 72.1% of total pineapple could be used for juice extraction. Only 53% of 14" Brix juice was obtained from the first pressing, and about 54.8% of 7" Brix juice was yielded after being diluted the residue with equal amount of water for the second press in basket type. Under experimental condition, only 59% of 20" Brix juice was concentrated by freezing. Various combinations of highly concentrated juice and fresh juice were performed and subjected to sensory evaluation. The most acceptable blended frozen concentrates were the mixture of 53" Brix juice with the fresh one in the ratio of 1 : 1 to 3 : 1, and also the mixing of 33" Brix juice with added sugar, which were statistically significantly different from the others. Approximately estimated, the cost of production varied from 20 to 24 bath per kg.