A Foaming Problem in Brewer's Yeast Slurry Destined for Drying for Animal Feed

A foaming problem in unwashed brewer's yeast collected at the end of primary fermentation and sold by a Western Canadian brewery for drying to make animal feed is described. The factors responsible for foaming have been shown to be residual fermentable carbohydrates in the volume of beer accompanying the yeast into the special storage tank. Foaming did not ensue until temperatures were raised either in transport or in temporary storage at the drying plant. Some methods of eliminating the problem are outlined.