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Feed from Sewage. III. Dried Activated Sewage Sludge as a Nitrogen Source for Sheep¹

University of Illinois, Urbana

Abstract

A ration in which 18% of the nitrogen was supplied as dried activated sewage sludge was found equal, as measured by nitrogen retention, to soybean oil meal and urea-containing rations of similar crude protein content (11–12%). The total nitrogen of the sludge-containing ration had a significantly lower apparent digestibility and a higher biological value.

¹ This investigation was supported in part by funds donated by the Sanitary District of Chicago, Illinois.

² The authors wish to acknowledge the analytical assistance of W. T. Haines, W. R. Casebeer, C. H. Anders, C. A. Drescher and F. J. Dorsey. Division of Animal Nutrition, Department of Animal Science, Urbana; also to acknowledge their appreciation of E. E. Hatfield of the Sheep Division of the University of Illinois in acquiring the experimental animals.