CAJ | 학술논문

利用DS30-III型双螺杆挤压膨化机对绿茶茶渣进行挤压膨化加工，在单因素试验的基础上，选取了物料含水量、喂料速度、螺杆转速、套筒温度为影响因子，以绿茶茶渣中没食子酸为响应面值，应用响应面设计方法建立数学模型，进行响应面分析。结论表明，获得高没食子酸含量的最佳工艺参数为：物料含水量70%，喂料速度58 r/min，螺杆转速60 r/min，套筒温度60℃。挤压膨化参数对没食子酸含量影响的大小依次为：物料含水量＞螺杆转速＞套筒温度＞喂料速度。经过最佳挤压膨化参数处理的绿茶茶渣中没食子酸含量为3.57 mg/g，与原料相比，没食子酸含量增加2.69 mg/g。
이용DS30-III형쌍라간제압팽화궤대록다다사진행제압팽화가공，재단인소시험적기출상，선취료물료함수량、위료속도、라간전속、투통온도위영향인자，이록다다사중몰식자산위향응면치，응용향응면설계방법건립수학모형，진행향응면분석。결론표명，획득고몰식자산함량적최가공예삼수위：물료함수량70%，위료속도58 r/min，라간전속60 r/min，투통온도60℃。제압팽화삼수대몰식자산함량영향적대소의차위：물료함수량＞라간전속＞투통온도＞위료속도。경과최가제압팽화삼수처리적록다다사중몰식자산함량위3.57 mg/g，여원료상비，몰식자산함량증가2.69 mg/g。
Researcher extruded green tea-leaves with DS30-III twin-screw extruder. According to single factor investigation, the mathematical models with the content of Gallic acid as the responses to moisture content of material, feeding speed, rotational speed of screw and temperature of barrel were established by using response surface design. It was followed by response surface analysis. The results showed that the optimal extrusion parameters of high content of Gallic acid in green tea-leaves were that moisture content of material was 70%, feeding speed rotational was 58 r/min, speed of screw was 60 r/min and temperature of barrel was 60 ℃. The significance of parameters on the content of Gallic acid in green tea-leaves was decreased according to the ranking of moisture content of material> rotational speed of screw>temperature of barrel>feeding speed. The content of Gallic acid in the tea-leaves that is dealt with optimal extrusion parameters was 3.57 mg/g , compared with the raw materials before extrusion;the content of Gallic acid had a increase of 2.69 mg/g.