Abstract: Taking lotus root as the test object, the drying time, brightness, microstructure, crystal type, viscosity, stability of condensation and freeze-thaw stability of lotus root starch were studied by four different drying methods: hot air drying, microwave drying, vacuum microwave drying and infrared drying. Sexuality and transparency impact.
The results showed that the X-ray diffraction patterns of lotus root starch treated by hot air drying, microwave drying equipment, vacuum microwave drying and infrared drying were the same, and the crystal types were all B-type structures.
The hot air drying and infrared starch particles are irregular in shape, the surface is rough, there are obvious pits, the agglomeration and cracks between the particles are serious, and the appearance quality is extremely poor. The microwave drying and vacuum microwave drying of the starch, the overall structure of the large particles is an ellipsoid type. The small particles are spherical, no agglomeration, and the vacuum microwave drying lotus root starch particles are relatively complete, the outline is clear, and the surface is smooth.
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