Optimizing Key Parameters And The Technology Design For Waxy Rice Flour Processing

This thesis aim to the optimum processing method and processing technology of waxyrice powder to meet the development demands in the modern industrial production. Toachieve producing the waxy rice powder in large-scale，industrialization and automation,further more promote the industry more standardization and scientization in our country.Based on this, the research take waxy rice as a raw material, polished waxy rice powder bythree different typical processing methods in laboratory scale. Studied in the processingmethods on the influence of physical and chemical properties of powders. To get the optimumconditions, the physical-chemical characteristics and processing properties of differentpowders were compared. Then according to the optimum conditions for process design.Measured the three different waxy rice powder basic ingredients(moisture, ash, protein,starch, whiteness, acidity, fat), physical and chemical properties(solubility, expansion ability,depositing performance, transparency,) and thermal and texture properties. Analysis the threemodes,the results show that the waxy rice powder from wet milling have some obviousadvantages: moisture content of powders more easily control, good color, expansion abilitybetter and the lower ash, acidity and fat acid. However there are some loss in protein andstarch during processing procedure than the others. There is a little difference in transparencyand water-binding capacity by the three methods at low temperature, with increase oftemperature, the powder from dry milling show good water-binding capacity. Also DSCexperiment tells gelatinization peak temperature form62.99℃to64.38℃; TPA test shows thewet milling is better than the two in the industrial production.Analysis of waxy rice powder from different soak time and polished process, the resultsshow as follows: at below temperature10℃in soak time5hours, the powder can meet theprocessing requirements, or at room temperature（25℃）in3hours. Choose the rightmachinery and process: form coarse grinding to fine grinding, we can get the best finenesspowders. Furthermore, analysis and summary the manufacturing techniques of quality control,in order to provide advice in actual production, make production more standardized.Select the appropriate processing scale and optimum selection for machining to designthe processing technology, according to principle of continuous, scale-up, automatic andstandardization production. We draw reasonable process flow diagram through the softwareAutoCAD and provide theoretical basis for process design.