Research On Rice Nutrient Enrichment Technologies

Rice is staple food of Chinese. People pay attention to nutrition structure deficiency of the rice gradually. Rice nutrition enrichment has become a problem that is urgent to be solved in the rice processing in china and a major topic that enhances the citizen's physical fitness. This topic is commissioned by enterprise. It studies on the nutrition enriched rice technologies in laboratory. It aims to provide experimental reference to enterprise industrialization production of nutrition enriched rice. The concrete research contents are as follow:1,Lysine is infiltrated into the rice by soaking technology as nutrition enhancer. The topic studies on the influence of the ratio of material to liquid,soaking time and soaking temperature on. lysine enrichment amount . It optimizes the technology conditions by orthogonal experiment and the result is that the ratio of material to liquid is 10:6, soaking time is 9 min, soaking temperature is 50°C and the amount of enriched lysine reaches to about 70mg/20g rice. Meanwhile, it studies on the soaking depth of lysine in rice. The soaking depth is 55.88%. Using the regression treatment and getting the relation between the lysine content and soaking depth. Using binomial model, the fitting equation is y = 2.0558-0.0466x+0.0003x~2 or cubic polynomial model, the fitting equation is y = 2.0548-0.0465x+0.0003x~2 +(1.2E-08)x~32,To solve the problem of elutriation loss of nutrition enhancer of rice during cooking, this topic uses technologies of surface gelatinization and coating films of rice to lock the nutrition. It studies on the influence of four different technologies on the elutriation loss and appearance quality of enriched rice and gets the reasonableprocess in gelatinization technology: soaking- microwave drying- steamgelatinization-hot-air drying and the optimal parameters is that microwavepower is 80%, the microwave time is 20s and steaming time is 8min in the technology. Elutriation loss of lysine is about 5%. It also studies on the relation between the moisture,elutriation loss,gelatinization degree and appearance quality. In coating treatment, the topic sprays the coating materials to the enriched rice and takes the elutriation loss as index and studies on the effect of locking nutrient of the three kinds of coating materials. The result shows that the three coating materials can reduce elutriation loss of nutrition of enriched rice a certain extent and 3%gelatin and 3%zein can be used as the coating films of enriched rice and the elutriation loss rate is 32.58% or 36.97%.3,It preliminarily studies on properties of cook and storage of enriched rice. The result shows that cooking quality between enriched rice and ordinary rice has no large difference. The surface gelatinization and coating treatment of enriched rice play a certain role in delaying the aging of enriched rice during the storage.4,According to the soaking and gelatinization technologies, this topic selects preliminarily major mechanization processing equipments.