Fresh-keeping techniques of mushrooms
Ningxia Red Goji Berries,Chinese Black Wolfberry,Healthy Food Dried Fruit Goji Black Berry Co.,Ltd , http://www.chgojipowder.com
Fresh-keeping methods of mushrooms include modified atmosphere preservation, cryogenic preservation, radiation preservation, and salt water preservation. The method is as follows: Atmosphere storage adopts simple modified atmosphere storage, and the mushroom can be kept fresh without opening the umbrella within 3 to 5 days, basically no browning, and the water loss rate is less than 1%. At present, air-permeable plastic film bags are generally used for packaging. Within the bag, oxygen concentration of 1% and carbon dioxide concentration of 10% to 15% are maintained, and the mushroom can be kept white and fresh for 4 days. Cold preservation and low temperature can keep mushrooms fresh and high quality. During storage and transportation, the temperature is kept between 0°C and 3°C, and the relative humidity is between 90% and 95%. Fast-frozen and fresh-keeping mushroom can be reduced from normal temperature to -40°C to -30°C within 30 to 40 minutes, and then frozen at -18°C to maintain its original quality and flavor for a long time. The quick-freezing process includes: acceptance of raw materials - washing - color protection - rinsing - manual grading - air extraction - blanching - primary cooling - secondary cooling - quick freezing - selection - ice wrap - packaging - frozen storage - transportation. Saline fresh-keeping will immediately cook the mushrooms after salting in the 19-wave culinary salt solution. After a few days, add appropriate amount of salt to maintain the 19-wave culinary salt solution. After 4 to 6 days, when the weight and pH are stable, they can be stored fresh.