VEGETABLE AND FRUIT DEHYDRATION 



175 



most economical combination of raw materials and preparation meth- 

 ods is to be attained. Graphs such as those shown in figures 73 and 74 





700 



600 



500 



400 



0- 



o 



>- a: 300 

 a: .. 



S5 



200 



100 































Drying Rat 

 N *'*-*^ 3tol 



ios 

















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J 5tol 



^ 



















7 tol 



lOtol 

 15 tol 



^W^ 



"^ 







Iltiz: 



^ 



| ?- — 



















i 



40 



50 



10 20 30 



PREPARATION LOSSES (PERCENT) 

 Figure 73. — Yields of dry product at various preparation losses and drying ratios. 



can be conveniently used to study the combined effect of these variables. 

 For example, we find from figure 73 that a raw material which has a 



80 





























MMING COSTS 

 CENTS) 



o 

























\ 



y \ 







Row \ 

 ^Cost F 



loteriol 

 } er Unp 



and T 

 reparec 



-imming 

 Ton 









1- Q 



z 

 Q 3 



Z 9 AC) 





/ 

















IAL A 

 DRY P 



ws\ 





^Sy^ 















< »■ 



S 20 









nJN. 

















< 

 or 







\ 



\ 



























— 1 | "•• 























! 1 



100 



200 300 400 

 DRY MATERIAL PER RAW TON (POUNDS) 



500 



600 



Figure 74. — Raw material and trimming costs per dry pound at various yields 



of dry product. 



20-percent preparation loss and a 5 to 1 drying ratio yields 320 

 pounds of dry product per raw ton. If the combined raw-material 



