Detailed explanation of key points of mushroom preservation technology, easily extend storage time

Mushroom preservation methods include modified atmosphere preservation, low-temperature preservation, radiation preservation and brine preservation, etc. The methods are:

Modified atmosphere preservation uses simple modified atmosphere storage, within 3 to 5 days it can keep mushrooms fresh and tender without opening their caps, basically without browning, and with a water loss rate below 1%. At present, breathable plastic film bags are generally used for packaging, maintaining an oxygen concentration of 1% and a carbon dioxide concentration of 10% to 15% inside the bag, which can keep mushrooms white for 4 days with good freshness.

Cold storage preservation: low temperature can keep mushrooms fresh and of high quality. During storage and transportation, maintain a temperature of 0°C to 3°C and a relative humidity of 90% to 95%.

Quick-freezing preservation: within 30 to 40 minutes, quickly lower mushrooms from normal temperature to -40°C to -30°C, then freeze-store them at -18°C, which can maintain their original quality and flavor for a long time. The quick-freezing process is: raw material inspection, cleaning, color protection, rinsing, manual grading, air extraction, blanching, first cooling, second cooling, quick freezing, fine selection, ice glazing, packaging, frozen storage, transportation.

Brine preservation: immediately place blanched mushrooms in a 19 Baume edible salt solution for salting, and after several days add an appropriate amount of refined salt to continue maintaining the 19 Baume edible salt solution. After 4 to 6 days, when the weight and pH are both stable, they can be sealed for preservation.