摘要
以脱脂豆粕为原料,采用双螺杆挤压技术,研究了喂料速度、物料含水量、螺杆转速、挤压温度对蛋白质消化率的影响,在单因素试验的基础上,通过正交试验确定出了豆粕最佳的挤压工艺条件。结果表明:影响消化率的主要因素是挤压温度和物料含水量,而喂料速度与螺杆转速影响较小。豆粕挤压蒸煮的最佳工艺条件是:喂料速度0.35 kg/min、物料含水量33%、螺杆转速130 r/min、挤压温度150℃,在该工艺条件下,消化率达到95.7%,比原始豆粕消化率提高12.1%。
Defatted soybean meal was processed by twin-screw extruder. The effect of feeding speed, moisture of the material, screw speed, extrusion temperature on the influence of digestibility of the protein were studied . Using single factor test, the optimum technological parameters were determined by orthogonal test. Results indicated that the main factors that affect digestibility were extrusion temperature , moisture content and feed rate . The screw speed had less influence. The optimum technological parameters were： feeding rate 0.35kg/min, moisture content 33%, screw speed was 130r/min and extrusion temperature was 150℃. In this conditions, the digestibility can reach up to 95.7%, 12. 1% increased compared to the raw soybean meal.
出处
《食品与发酵工业》
CAS
CSCD
北大核心
2008年第5期124-127,共4页
Food and Fermentation Industries
关键词
挤压蒸煮
脱脂豆粕
体外消化率
extrusion cooked, defatted soybean meal, in vitro digestibility
