Dondurarak konsantre metoduyla sumak, elma, havuç ve üzüm konsantreleri üretimi

Fruit juices contain high amounts of water; so it is beneficial to concentrate them as much as possible to reduce the microbial spoilage and cost of transportation. Various methods are used to produce fruit concentrates. Among them, freeze concentration can be considered as a non-thermal concentration technique. The quality properties of the original juice will not, therefore be altered appreciably after being concentrated.In this study, sumac, apple, grapes and carrot juices were thawed as a function of time at different temperatures (10 to 25º C) and initial concentrations (1 to 40 oBrix) to see the effect of these parameters on the degree of separation. The present method can be named as ?differential freeze concentration? due to its dependency on time.As expected, the degree of separation decreased with increase in the initial concentration, thawing temperature and time for all juices. The size and pH values of the samples being thawed were also observed to affect the degree of separation. Thus, increase in size and decrease in the pH values of the samples, resulted in increase in degree of separation.