Absrtact: Using horseshoe as raw material, microwave drying equipment was used to drying horseshoe starch. The effects of microwave drying equipment on water content, whiteness, acidity, iodine blue value and comprehensive quality of horseshoe starch were investigated, and the drying process was optimized by orthogonal test.
The results showed that the optimum microwave drying conditions were as follows: microwave power 210W, loading 1.47kg/m2, heating time 14min and intermittent time 0.75min. Under the optimum conditions, the moisture content, whiteness, acidity and iodine blue value of horseshoe starch were 10.12%, 97.5%, 0.21 mL and 17.90 respectively after microwave intermittent drying. After microwave intermittent drying, the moisture content of starch reached the standard of safe moisture content, whiteness was slightly improved, acidity was decreased, iodine blue value was increased, and comprehensive quality was improved.
Waterchestnut, also known as water chestnut, chestnut, Tongtiancao, is a light-water perennial herb of the family Cyperaceae. Its bulb is flat and round, its skin is chestnut or red-brown after ripening, its surface is bright and delicate, and its flesh is white.
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