以高粱米为原料,以淀粉回收率为指标,通过单因素及响应面优化试验,对高粱米淀粉的中性蛋白酶法提取工艺进行了优化。结果表明,中性蛋白酶法提取高粱米淀粉的最佳工艺条件为,中性蛋白酶添加量600 U/g,酶处理温度35℃,酶处理p H 7.0,酶处...以高粱米为原料,以淀粉回收率为指标,通过单因素及响应面优化试验,对高粱米淀粉的中性蛋白酶法提取工艺进行了优化。结果表明,中性蛋白酶法提取高粱米淀粉的最佳工艺条件为,中性蛋白酶添加量600 U/g,酶处理温度35℃,酶处理p H 7.0,酶处理时间3.2 h,粉碎粒径132μm。在此条件下,高粱米淀粉回收率为83.35%,与普通水提法相比增加了16.49%,具有较高的应用价值。展开更多
The extraction ofCannaedulisKer. starch from its rhizome was performed using 2 different types of press (hydraulic press and screw press) and with the addition of Na-metabisulphite and NaOH (in the range of concentrat...The extraction ofCannaedulisKer. starch from its rhizome was performed using 2 different types of press (hydraulic press and screw press) and with the addition of Na-metabisulphite and NaOH (in the range of concentration 100 - 5000ppm each). The optimum condition for thisprocess was determined by Central Composite Design of experiment and the statistical calculation was solved by Design-Expert7.0.0. The targets of the observed responses were high starch yield, low ash, low fiber, and high carbohydrate content. The results showed that the starch yield and the reduction of fiber were only influenced by the physical treatment whereas ash content in the product was influenced byboth the NaOH concentration and physical treatment. The carbohydrate content in the extraction product was affected by NaOH, by the interaction between the concentrations of NaOH and Na2S2O5 and also by the physical treatment. The hydraulic press gives much better responses compared to the screw press.But in the selected range of additives concentrations,the screw press gives a higher starch yield(30%-52%).展开更多
文摘以高粱米为原料,以淀粉回收率为指标,通过单因素及响应面优化试验,对高粱米淀粉的中性蛋白酶法提取工艺进行了优化。结果表明,中性蛋白酶法提取高粱米淀粉的最佳工艺条件为,中性蛋白酶添加量600 U/g,酶处理温度35℃,酶处理p H 7.0,酶处理时间3.2 h,粉碎粒径132μm。在此条件下,高粱米淀粉回收率为83.35%,与普通水提法相比增加了16.49%,具有较高的应用价值。
文摘The extraction ofCannaedulisKer. starch from its rhizome was performed using 2 different types of press (hydraulic press and screw press) and with the addition of Na-metabisulphite and NaOH (in the range of concentration 100 - 5000ppm each). The optimum condition for thisprocess was determined by Central Composite Design of experiment and the statistical calculation was solved by Design-Expert7.0.0. The targets of the observed responses were high starch yield, low ash, low fiber, and high carbohydrate content. The results showed that the starch yield and the reduction of fiber were only influenced by the physical treatment whereas ash content in the product was influenced byboth the NaOH concentration and physical treatment. The carbohydrate content in the extraction product was affected by NaOH, by the interaction between the concentrations of NaOH and Na2S2O5 and also by the physical treatment. The hydraulic press gives much better responses compared to the screw press.But in the selected range of additives concentrations,the screw press gives a higher starch yield(30%-52%).
