Growth of <i>Candida utilis</i> on Enzymatically Hydrolyzed Potato Waste

Abstract

Attempts to grow mixed cultures of Endomycopsis fibuligera and Candida utilis on waste material obtained from a potato processing plant were only partially successful; poor amylase production by Endomycopsis resulted in slow growth of the Candida. There was extensive conversion of starch to glucose when waste, which had been treated with a high speed shear/disintegrator, was hydrolyzed by industrial amylases derived from Aspergillus niger and Bacillus licheniformis. Growth of C. utilis on the separated liquid phase of the hydrolysate, supplemented with inorganic nitrogen, proceeded normally; the yields and growth rates were similar to those obtained with conventional substrates.