Package and storage of sweet corn

2022-03-09

Sweet Corn ears in package production are mostly packed in polyethylene film bags or other plastic bags. You can peel the leaves, go to the must, select the panicles after the package; you can also keep all the leaves or leave 2-4 pieces of lotus leaves, and then package, coat the crate, to be sent to the cold storage. The packaging operation is performed at a low temperature (5°C) pre-cooling room.
Chitosan obtained from chitin, because of its good film-forming and biochemical properties, can prevent spoilage without causing hypoxic respiration. Chitosan also has the advantages of being non-toxic, odorless, and easy to decompose, and it will not cause environmental pollution. It has become a better coating material for fresh fruits and vegetables, which can reduce the loss of sweet corn nutrients and extend storage time to some extent. . Low temperature is an important basis for the preservation of sweet corn, and the combination of chitosan coating and low temperature environment is an ideal measure for storage of sweet corn. For sweet corn coated with chitosan, the respiratory intensity and ethylene production were significantly lower than that of non-cleared corn, and the coating effect was better with 1.0% chitosan. After being stored for four days, the antibacterial effect of chitosan is very obvious at the storage temperature of 0°C. The 1.0% chitosan coating can effectively inhibit the growth of bacteria and fungi.
5. Storage Preservation The pre-chilled sweet corn ear is sent to a quick-frozen freezer for quick freezing. The temperature between -25°C and -30°C, and the freezing time is more than 10 hours. When the center temperature reaches -18°C, it can be stored in a low-temperature storage at -18°C for long-term storage. Using this method, the original color, aroma, taste and nutritional value of sweet corn can still be preserved after storage for 7-8 months.
Another method is to store sweet corn ear at a temperature of 0°C. However, 0 °C cold storage method, can not store sweet corn for a longer time, a little longer, it may occur mold mildew phenomenon.

In addition, there is a method of freeze-drying preservation, which involves peeling the leaves of the loquat leaves and water with about 10% of the moisture, packaging them with a polyethylene film, and storing them at room temperature. The ear of sweet corn treated by this method can be stored at room temperature for more than one year, which can perfectly maintain the original flavor and quality of sweet corn. The disadvantage is that the energy consumption of sweet corn ear is larger in this method.

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