膨化薯干原料柠檬酸发酵新技术的研究

薯干原料经挤压式膨化机膨化后直接加水配料接菌进行柠檬酸发酵。省去了传统工艺中的原料粉碎 ,加α 淀粉酶液化 ,高温蒸煮等预处理工序 ,具有明显的节能、节水的效果。经摇瓶发酵平均产酸稳定在 13 6 % ,转化率可达 97 4%。比传统工艺转化率提高 5 %左右。防腐剂A3最适用量为 0 0 8mg/g原料 ,新技术工艺简单可行

Study on the New Technology of Citric Acid Fermentation Using Puffed Dry Potato as Raw Material

The dry potato was puffed in extruding type puffing machine and then was mixed with water and inoculum to produce citric acid through fermentation process directly. Compared with traditional technology, this technology had the advantages of saving energy and water and without need of grinding, liquefaction and steaming at high temperature to raw material. Through shaking flask culture, the average production rate could reach 13.6%and conversion rate could reach 97.7% which was about 5% higher than traditional technology. The optimal quantity of preservative A3 was 0.08mg/g raw material.