Harvest. In the early stage of milk ripening, i.e. 20-22 days after pollination. the 18th day of pollination, the moisture content of sweet corn was determined. When the moisture content was 70% ~ 73%, it could be harvested. Packing should be handled with care. The upper basket should be pressed on the lower one. It should be packed immediately after harvest, should stay in the field for a long time, so as to keep the bracts green dehydrated. Bracts removed. Root out the bracts, break off the bald tips, remove the raw materials that are moth eaten, moldy, decayed, lack of grains, variegated grains, tightly placed over ripe tender raw materials. It can also be soaked in salt solution of 1% ~ 1.5% for 1 ~ 5 hours to obtain the effect of seasoning, insect repellent cooling. Cool down. After the bracts were removed, they were cooled in cold water at 4 ℃ for 15-20 minutes. classification. According to the classification of whole ear cut section, it is required that there is no bald tip, no bald tail, no moth eaten no grain missing, the grains are placed regularly evenly. According to the diameter: 4.5-5cm is the first grade, 3.8cm-4.4cm is the second grade. Cut clean. Remove the filaments manually mechanically, clean them in running water. Section. Cut the section with the cutter cutter, implement the flow operation with the cutter operation.

The operator will cut the tail (thick end) 1 ~ 2 cm, the second operator will cut off the tip 3 ~ 5 cm, to ensure that the cutting is smooth there is no breakage around the knife edge. Rinse. Cleaning corn ear surface in running water (fast operation) requires no silk, no stain, size thickness. Hot. When corn ear is heated to 90 ~ 98 ℃ in boiling water steam for 7 ~ 12 minutes, it can kill some microorganisms, damage enzyme activity, drain some gas in the arrangement, feed fragile damaged grains. Cool down. After scalding, the corn ears were cooled in 10 ℃ ~ 15 ℃ cold water, then cooled to below 5 ℃ in 0 ℃ ~ 5 ℃ cold water. choice. After cooling through, the conveyor belt is manually selected to remove the over cooked scalded corn broken grains. Blow dry cool. The surface moisture of the corn is blown to make it cool further. quick-frozen. The fluidized bed tunnel is selected. The air temperature in the equipment is - 30 ~ - 40, the air temperature is - 26 ℃ ~ - 30 ℃, the flow rate of cold air under the equipment is 6 ~ 8 m / s, the freezing time of corn cob with diameter of 4.5 ~ 5 cm is 8 ~ 15 minutes (the temperature of rod center is below - 18 ℃). choice. Further remove the defective particles fragments. packing. It is usually packed in polyethylene film bags at - 5 ℃. cold storage. The freezing temperature of quick-frozen corn is - 18 ℃ ~ - 20 ℃, the relative humidity is 95% ~ 98%. Crystallization ice sublimation should be avoided during storage. Check. The first is sensory, physical chemical microbiological examination.