为了提高复合蛋粉的溶解特性,以鲜蛋为原料,硫酸亚铁为铁强化剂,利用喷雾干燥技术制备高铁蛋粉并对溶解特性进行研究.采用三因素二次通用旋转组合试验设计结合响应面法探讨了喷雾流量、进料温度、进风温度对高铁蛋粉溶解特性的影响,建立了高铁蛋粉溶解特性与各因素间的回归模型.综合分析表明,喷雾流量和进风温度对溶解特性的影响显著(p＜0.05),影响主次顺序为:喷雾流量＞进风温度＞进料温度.最佳工艺参数为:喷雾流量22 mL/min,进料温度39.82℃,进风温度178.21℃,此条件所得高铁蛋粉溶解指数为1.87,水合能力为5.63 mL/g,结块率为24.58g/100g,综合评分110.18;对比分析鲜蛋与高铁蛋粉主要成分,铁强化量高达77.67％.由此说明,通过三因素二次通用旋转组合试验与响应面法优化得出的喷雾干燥工艺可有效提高高铁蛋粉的溶解特性.%In order to improve the solubility of compound egg powder, egg powder with high Fe content was prepared by spray-drying technology, using egg as a raw material and ferrous sulfate as nutrition additive of Fe. The effects of the flow rate of spray, introduction temperature and inlet air temperature on the solubility of Fe enrichment egg powder were investigated by second general combination of rotating design method, and the regression model between the solubility of Fe enrichment egg powder and each factor was obtained. The results showed that: the flow rate of spray and inlet air temperature had significant influence on the solubility of Fe enrichment egg powder (p<0.05). The sequence of influence from significant to common was the flow rate of spray, inlet air temperature and introduction temperature. The optimum parameters were the flow rate of spray 22mL/min, introduction temperature 39.82℃, inlet air temperature 178.21℃. With the optimum condition, the solubility exponent of production was 1.87, water holding capacity 5.63 mL/g, agglomeration 24.58 g/100g and comprehend score was 110.18. Comparing the nutritional compositions of fresh egg, the content of Fe in Fe enrichment egg powder was 77.67%. Thus it can be concluded that it is possible to improve the solubility of Fe enrichment egg powder with the technology of spray drying.
展开▼
