Application Of Dry Granulation Technology In The Production Of Functional Foods

Dry granulation technique has been mature applied in abroad. In order to improve the production efficiency and to meet the demand of the enterprise, it is necessary to understand the dry granulator, process parameters and to study the changing feasibility of existing products.Domestic LGJ type of dry granulator was used to granulate the milk calcium chewable tablet. Based on the investigation and analysis of the factors, the result showed that rollers pressure, rollers speed, feed speed are three greatest impact factors. Orthogonal design test were used to select optimum granulation process parameters:Rollers pressure 3.0Mpa, rollers speed 12rpm, feed speed 20rpm, and the impact factors order is: rollers pressure> rollers speed> feed speed. Using the optimum process parameters to prepare the intermediate particles of milk calcium chewable tablet, evaluate its quality as the indicator of particle size distribution, obtained particles yield, friability degree and the water content.Pressing the intermediate particles into tablets, and then analyze the quality through physical and chemical indices (appearance, weight difference, hardness, friability degree and content determination) and microorganism indices. Through the comprehensive comparison of two different techniques, the final results showed that:dry granulation technique can improve production efficiency, saving energy and labor costs, improve stability of product quality and the enterprise’s market competitiveness.Domestic LGJ type of dry granulator was used to granulate the probiotics instant granules, and using orthogonal design method to select optimum formula as follows:Maltodextrin70%, whey protein 10%, galacto- Oligosaccharides 8%. This study chose two methods to prepare the sample. Through the comparison of process loss and the stability of samples, determine the appropriate method. The result showed that: the formula and method can keep the stability of the probiotics, and the practical operation is more convenient.The final results of the study showed that: dry granulation technique simplifies the processes of wet granulation, shortening the production cycle, saving energy and labor costs, improving the quality of products, and it is more suitable for the sensitive ingredients about heat and humidity.