摘要
以菜籽蛋白萃取过程为研究对象，推导出内扩散控制时，单颗粒菜籽粕及菜籽粕颗粒群的蛋白萃取速率模型。结果表明，在较高温度（４０～５０℃）或较高的ｐＨ值（ｐＨ＝１１．５～１２）下，颗粒群萃取模型与实验数据相当吻合，并求得５０℃，ｐＨ＝１１．５时，ＯＨ－在菜籽粕中的有效扩散系数Ｄｅ＝６．３８·１０－１１ｍ２／ｓ。本文还讨论了萃取温度以及ｐＨ值对萃取速率的影响。
The extraction rate of rapeseed protein was studied both theoretically and experimentally. It was found that rapeseed protein extraction process was controlled by the diffusion of OH - through product layer and the experimental data were fit with the particle group extraction model constructed by authors at higher temperature (40 ～ 50℃) or at higher pH value ( pH=11.5 ～12 ).The efficient diffusion coefficient of OH - was estimated to be 6.38·10 -11 m 2/s. The effects of temperature and pH value on extraction rate were also studied.
出处
《南京化工大学学报》
1997年第2期1-6,共6页
Journal of Nanjing University of Chemical Technology(Natural Science Edition)
