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The Composition, Digestibility and Feeding Value of Hydrolyzed Sawdust^*

Massachusetts Agricultural Experiment Station, Amherst, Massachusetts

ABSTRACT

This investigation was undertaken at the instigation and with the coöperation of the Forest Products Laboratory of the United States Department of Agriculture, located at Madison, Wisconsin. Sherrard and Blanco (1) of that laboratory have carried on extensive experiments in the conversion of the woody fiber of the sawdust from several species of wood, into a more soluble form for the production of industrial alcohol, and as a possible source of cattle food.

The method of treatment consists in cooking the sawdust under 120 pounds pressure with dilute sulphuric acid, which converts a portion of the cellulose and allied substances into sugar. The liquor resulting from the digestion together with the washings from the undigested sawdust residue is neutralized with lime and evaporated to a thick syrup, which is mixed with the dried residue. The product is then ready for feeding. It is a dark brown somewhat powdery meal with a slightly sweet woody odor and a woody flavor.

^* Published with the joint permission of the Director of the Massachusetts Agricultural Experiment Station and the Forester, Forest Service, United States Department of Agriculture.