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Hydrolyzed Sawdust for Dairy Cows

Wisconsin Agricultural Experiment Station

Abstract

For many years there has been frequent discussion as to whether sawdust could not be utilized in some manner as a stock food. Since untreated sawdust is valueless for this purpose, various methods of hydrolyzing sawdust—or treating it chemically to increase its digestibility and feeding value—have been suggested. No definite, scientific feeding trials, however, appear to have been carried on with such materials.

In the work of the Forest Products Laboratory of the United States Department of Agriculture, located at the University of Wisconsin, on the utilization of timber wastes, an improved process of hydrolyzing sawdust with dilute acid under pressure has been developed. In this process about 25 percent of the dry weight of the wood is converted into sugar and the rest of the wood fiber or cellulose is changed considerably in physical character and solubility. This process is now being used on a commercial scale in the manufacture of industrial alcohol.