UNITED STATES DEPARTMENT OF AGRICULTURE 
JfcW^fL 
I BULLETIN No. 927 i 
Contribution from the Bureau of Plant Industry 
WM. A. TAYLOR, Chief 
T^^mTU 
Washington, D. C. 
April 16, 1921 
COMMERCIAL UTILIZATION OF WASTE SEED 
FROM THE TOMATO PULPING INDUSTRY. 
By J. H. Shkader, formerly Chemical Technologist, and Frank Rabak, Chemical 
Biologist, Office of Drug, Poisonous, and Oil-Plant Investigations. 
CONTENTS. 
Page. 
Profitable utilization of waste mate- 
rials 1 
Nature and source of tomato waste 2 
Distribution and quantity of toma- 
toes pulped annually 2 
Quantity of seed available : 4 
Commercial products obtainable from 
tomato seed 4 
Procedure in handling tomato waste_ 5 
The use of exhaust steam compared 
with live steam 15 
Page. 
Extracting the oil from tomato seed- 16 
Refining and deodorizing the oil 19 
Oil cake and meal ; 20 
Commercial procedure for utilizing 
tomato waste 20 
Cost of handling the waste 23 
Possible returns and net profits from 
oil, cake, and meal 28 
Summary i 29 
PROFITABLE UTILIZATION OF WASTE MATERIALS. 
The utilization of waste materials from the canning or packing 
of certain classes of agricultural products is at present commanding 
considerable attention in connection with the possibility of reducing 
the waste of commodities of commercial importance. The nature of 
the waste material varies, of course, with the type of products which 
are canned or packed. 
In the manufacture of the various tomato products for which there 
are very extensive packing operations in the United States there 
occurs a waste, consisting of seeds and skins, which possesses in- 
herent possibilities from the standpoint of profitable utilization. 1 
At present this material is not being utilized, possibly because of 
lack of knowledge regarding the proper methods of procedure at- 
tending a well-directed commercial project of this character, and 
1 Rabak, Frank. The utilization of waste tomato seeds and skins. U. S. Dept. Agr. 
Bui. 632. 15 p. 1917. 
1 
