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Xiangru fresh preservation processing process is divided into: mushroom picking - row temperature (or storage) - Sorting cut-refrigerated - packaging - transport.
Picking: Stop water spray the day before picking, select 60% open, pick no mushrooms and insects, round mushroom bodies, and pick mushrooms that are more than 4.5 cm in diameter. Mushroom shank down when wet, according to the size of the classification on the sieve, the temperature of the hot air is controlled at 40 °C to the mushroom cover shine does not wrinkle, the mushroom edge does not touch the hand, after the wet end of the mushroom cooling to room temperature into the library preservation. Sorting and cutting: The length of the mushroom shank of the preserved mushroom is generally one-half the diameter of the mushroom-lid cover, and the excess must be cut off. Remove the damage mushroom, flat umbellating mushroom, rotted mushroom and so on when cutting the handle, according to the mushroom cover diameter 4-4.9 centimeters, 5-5.9 centimeters, 6 centimeters above three kinds of specifications size basket storage. Packing: Packing is divided into 5 kinds of packaging: 3 kg, 5 kg, 7 kg, 10 kg, and 11 kg. Pre-cooled in cold storage for more than 6 hours before packaging, then pour into the bag to suck the air in the bag, pack and seal, and load it. Foam box can be. Transportation: Refrigerator trucks are generally required for shipment and the temperature is maintained at 0-5°C. When the outdoor temperature does not exceed 10°C, it can also be transported by truck.
Note: mushrooms can not be too wet, otherwise the mushroom body black, wrinkled, inelastic. The refrigerating time can not be too long, generally in 2 weeks, the shorter the refrigerating time, the better the freshness of mushrooms. The temperature of the freezer is controlled at 0-5°C and must not be lower than 0°C. During the refrigerating process, the basket should be frequently turned over to ensure that the parts are cooled evenly. The temperature inside the container is controlled at 0-3°C during packaging.
About the technology of preservation of shiitake mushrooms
The refrigerated preservation of mushrooms is to use low temperature to slow down the activities of enzymes and microorganisms, inhibit the deterioration caused by the tissue chemical reaction of mushrooms, and achieve effective short-term preservation. And vacuum packaging with plastic film bags, so that the mushroom body in low oxygen and high concentration of carbon dioxide environment, with low temperature storage, delay the respiration and physiological changes, thus effectively extending the storage life of the mushroom body.