Watermelon as one of underutilized fruits is harvested in summer
months and is liked by consumer due to its delicate flavor and
attractive color (Tressler and Joslyn, 1971). Watermelon juice is
vulnerable to microbial and enzymatic deterioration due to high
water activity. Drying is widely used to extend the shelf life of food
products. The decrease in moisture content causes the reduction of
the mass, volume, enzymatic and microbial activity (Karim and
Hawlader, 2005; Kaya et al., 2007). Spray and freeze drying are
the common techniques employed for the dehydration of fruit
juices. The sticky behavior of sugar and acid rich materials is