挤压处理灵芝孢子粉提取灵芝多糖

以挤压喷爆为处理方法，孢子破壁率和灵芝多糖得率为研究对象，分析水分含量、螺杆转速、温度、进料速度对灵芝孢子的破壁率和灵芝多糖得率的影响。采用正交试验优化挤压工艺条件得出：水分含量15%、螺杆转速223r/min、温度125℃、进料速度155g/min，在此条件下灵芝孢子破壁率为78.6%，多糖得率为2.219%，通过在最佳条件下进行二次挤压，灵芝孢子破壁率提高为83.48%，多糖得率为2.37%。

Effect of Twin-screw Extrusion Conditions on Polysaccharide Extraction from Ganoderma lucidum Spore Powder

Ganoderma lucidum spore powder was subjected to twin-screw extrusion before polysaccharide extraction. The effects of material moisture content, screw rotary speed, temperature and feeding speed on the cell wall disruption rate of Ganoderma lucidum spore and polysaccharide yield were explored. The four process conditions were optimized by orthogonal array design method as follows: material moisture content 15%, screw rotary speed 223 r/min, temperature 125 ℃ and feeding speed 155 g/min. The resulting cell wall disruption rate and polysaccharide yield were 78.6% and 2.219%, respectively, which were increased to 83.48% and 2.37% after the second twin-screw extrusion.