Studies of water states in food and sludge (Chen et al., 2010, Devine et al., 2014 and Liao et al., 2000) have shown that the water state balance is affected by the characteristics of the material, such as the moisture content, its chemical composition, and its physical structure, and the different water states are removed in turn as the total moisture content decreases (Robinson and Knocke, 1992 and Tsang and Vesilind, 1990)