PREPARATION AND EVALUATION OF AN ANIMAL FEED BY-PRODUCT PRODUCED BY SOLID-STATE FERMENTATION OF APPLE POMACE

After solid-state fermentation (SSF) with different yeasts and removal of ethanol, dried apple pomace powders were found to be enriched in c rude protein (3 times), fat (1.5-20 rimes) and vitamin C (2 rimes). Th ere was also an increased content of minerals (Zn, Cu, Mn and Fe), cru de fibre and ash. The products were free from aflatoxin. However solub le protein content increased slightly while sugar content was reduced The colour Ca, Mg and energy values of the dried apple pomace remained almost unaffected. Among the yeasts, Candida gave the highest crude p rotein, Saccharomyces better soluble proteins, Torula the lowest fat c ontent with comparable total sugar but different acid contents. The yi eld of dried apple pomace varied from 54 to 65% with dehydration (4.35 :1) and rehydration ratios (1:4.20 to 1:4.60) quite comparable to the dried, unfermented apple pomace. It is concluded that apple pomace use d concomitantly for ethanol production by fermentation with Saccharomy ces and dried after ethanol removal could be used profitably as an ani mal feed. Copyright (C) 1996 Elsevier Science Ltd.