研究了以啤酒生产中废弃酵母为原料的优质酵母提取物制备工艺。啤酒废酵母经除杂、洗涤脱苦、细胞破碎、蛋白水解、浓缩干燥等加工程序,获得一种水溶性良好、淡黄色、粉末状酵母提取物产品。该产品的原料利用率为71.00%,粗蛋白利用率为85.55%。100 g绝干酵母提取物含有粗蛋白52.90 g、膳食纤维9.34 g、灰分11.08 g、脂肪0.20 g、碳水化合物26.48 g,其中粗蛋白主要以游离氨基酸和低聚肽形式存在。

The study focused on a kind of high-quality yeast extract processing technology based on spent brewer's yeast.The process included removal of impurity,debittering,enzymolysis,concentration and spray dehydration,after which a kind of light yellow yeast extract powder with well water-solubility can be obtained.During the process,71.00% of raw yeast's total amount,which be measured by absolutely dry weight,came into the final product,and the percent for crude protein was 85.55%.Analysis result of the product showed that 100 g yeast extract contained 52.90 g crude protein,26.48 g Carbohydrate,0.20 g fat,11.08 g ash and 9.34 g dietary fiber.What's more,free amino acids and oligopeptide was the main form of nitrogen in the yeast extract,and it will be of great important potential material for health-care food.