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Optimization of composite extrusion process parameters of soybean protein and fish |
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KeyWord:soybean protein fish composite extrusion response surface process parameter optimization |
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Abstract: |
With fish and soybean protein as raw materials,the fish-soybean composite protein was prepared by twin-screw extruder. Through single factor experiment,the moisture content of composite protein, five areas temperatures in barrel,feeding speed and screw speed of screw extruder were investigated, finally the parameters were optimized by response surface methodology as follows:moisture content of composite protein 30%,feeding speed 35 r/min,screw speed 175 r/min,five areas temperatures in barrel 90?℃→ 100?℃→110?℃→145?℃→110?℃. Under the optimal conditions,the indexes of extrusion product were as follows: degree of organization 2.12,tensile force 3 224.6 g,protein content 679%,crude fat content 1.56%,protein in vitro digestibility rate 87.4%. |
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