脱氟南极磷虾虾糜与大豆分离蛋白双螺杆挤压重组工艺研究

Study on twin-screw extrusion processing of defluorinated Antarctic krill surimi and soybean protein isolate

摘要: 以冷冻南极磷虾为原料,制备一种平均氟含量为79.79 mg/kg干重的脱氟南极磷虾虾糜(AKS)。将脱氟虾糜与大豆分离蛋白(SPI)混合物料经双螺杆挤压作用进行蛋白质重组,以组织化度为指标,研究物料水分、机筒Ⅳ区加热温度、螺杆转速以及进料速度等工艺参数对组织化产品特性的影响,并用响应面分析优化工艺,得到虾糜-大豆分离蛋白组织化的最优工艺:混合物料水分为40%(虾糜:大豆分离蛋白=4:5),机筒一至四区的加热温度分别为70、90、120、140℃,螺杆转速为180 r/min,进料速度为30 kg/h,制备得到组织化度为2.18的暗红色条状组织化产物。

Abstract: Defluorinated Antarctic krill surimi was prepared with the frozen Antarctic krill as raw material. The final fluorine content of defluorinated krill surimi was 79.79 mg·kg^-1 on average by dry weight. Study on twin-screw extrusion texturization of krill surimi protein material was carried out with combination of AKS and SPI as raw material. Optimal process was obtained by single-factor experiment and response surface analysis,that was mixed material moisture of 40% AKS:SPI=4:5,heating temperature of 70,90,120 and 140℃,screw speed of 180 r/min,and feed rate of 30 kg/h. The texturization index of extrusion product was 2.18 with dark red color.