UTILIZATION OF WASTE SEED FROM THE TOMATO. 



15 



was reduced, respective^, to 

 35.6, 21.9, and 9.6 per cent. In 

 a fifth passage through the drier 

 the moisture was reduced to 3.1 

 per cent. 



It is, of course, apparent that 

 a large commercial drier of this 

 type (fig. 9) would be mate- 

 rially longer than the experi- 

 mental drier, and probably one 

 passage of the seed through the 

 machine would reduce the mois- 

 ture to about 10 per cent, which 

 would be sufficient for subse- 

 quent oil extraction. 



It is thus evident that one 

 workman could handle the 

 whole operation of seed treat- 

 ment from the seed-washing 

 cyclone through the moisture 

 expeller and drier to the 

 storage-bin conveyors. 



THE USE OF EXHAUST STEAM 



COMPARED WITH LIVE 



STEAMS 



The advisability of using ex- 

 haust steam for heating the air 

 with which to dry the seed de- 

 pends (1) upon the other uses to 

 which the available steam might 

 be put and (2) upon the cost of 

 producing live steam. Data 

 from seed-drying plants show 

 that with air heated to about 

 185° F. delivered at a rate of 

 2,000 cubic feet per minute the 

 seed from a 5,000-basket pulp- 

 ing station may be dried in an 

 eight-hour day. The quantity 

 of steam necessary for this heat- 

 ing is 250 pounds an hour. 



5 Contributed by J. C. Smallwood, Johns Hopkins University. 



