In real application, the solid products from the hydrothermal
process should be dried by some dryers before using it as a solid
fuel; therefore, it is necessary to analyze its drying performance.
The drying characteristics of the hydrothermally treated products
were obtained by exposing 140 g of raw product divided in two
glass petri dishes to normal atmospheric condition and by periodically
weighing until the mass difference reaches less than 0.5%.
The centrifuged solid products were also dried under the same
condition for comparison.