2.2.1. Concentration of fruit juice
Generally, the feedstock is concentrated before introducing into the
spray dryer. The concentrated juice has increased in solid contents
thereby reducing the amount of liquids and that must be evaporated
in the spray dryer. The feedstock in conventional large scale spray
dryer normally concentrates to 50–60% (w/w) before introduction to
spray dryer. However, the small scale laboratory spray dryer will have
more diluted feedstock because it will be clogged easily if the feed has
high viscosity