不同粒度对大米蛋白提取率及碱用量的影响

Effect of different Particle Sizes on Rice Protein Extraction Rate and Alkali Amount

大米蛋白和淀粉包络结合紧密,较难分离。碱法是提取大米蛋白常用的传统方法,但碱提的诸多危害及大量污水的产生一直是制约大米蛋白生态化生产的关键问题。研究了大米颗粒不同粒度对大米蛋白提取碱用量的影响以及对废水进行了初步的处理,结果表明经过高压均质处理降低粒度,在同碱液浓度下的蛋白提取率增加了24%,在提取率达到79%的情况下用碱量降低了42.86%。采用0.1%壳聚糖处理废水后,蛋白质去除率达32.45%,COD值也由4 046.464 mg/L降为2 644.224 mg/L,有效减少了后续污水处理的负荷。研究结果为大米蛋白生产的生态化生产提供了参考。

Rice protein and starch envelope closely and it＇s difficult to separate them. Alkaline is always used to extract rice protein. However, the danger of alkaline extraction and a large number of polluted water has been being the key issue that restricts the ecological production of rice protein. The impact of different particle sizes of rice on the amount of alkali and preliminary treatment of waste water were studied. The results showed that the protein extraction rate was increased by 24% under the same amount of alkali by reducing particle size after dealing with high pressure homogenization. Simultaneously, in the case of higher extraction rate of 79%, the amount of alkali was reduced by 42. 86%. After treatment of waste water by 0. 1% chitosan, the protein removal rate reached 32.45% , COD reduced from 4 046. 464 mg/l to 2 644.224 mg/l. The load on following - up treatment of waste water was reduced effectively. The results laid a theoretical basis for the ecological production of rice protein.