What are the preservation methods for Pleurotus ostreatus

　　 1. Fresh and hidden. The storage time of fresh oyster mushrooms at room temperature is greatly affected by temperature and air humidity. When the room temperature is between 3 and 5 °C and the relative humidity of the air is about 80% , the fresh mushrooms can be stored for one week. When the amount of mushrooms is small, the oyster mushrooms can be sealed in a cylinder containing a small amount of cold water, and the temperature can be stored for about one week even if the temperature reaches 15 to 16 °C. The oyster mushrooms can also be completely immersed in cold water, but the water must be clean and hygienic. The iron content of the water should be less than 2mg per liter , so that the oyster mushrooms will not turn black.

　　 2. Refrigerate. Refrigeration refers to a preservation method that is stored at a temperature close to 0 ° C or a few degrees higher, but the temperature of refrigeration is not as low as possible. Refrigeration can be carried out in the refrigerator or in the refrigerator. During the refrigeration process, the temperature of the air in the box should be checked frequently. The storage time should be controlled within 7 days.

　　 3. Freeze and keep fresh. Fresh mushroom entity or steam for 4 to 8 minutes in boiling water, in a 1% citric acid solution was rapidly cooled, the drain water and put into a plastic bag with a freezer storage. When the amount is small, it can be stored in the refrigerator and kept fresh for 3 to 5 days.

　　 4. Atmospheric storage. The freshly picked mushrooms are still breathing, absorbing oxygen and releasing carbon dioxide. Properly reducing the concentration of oxygen in the environment and increasing the concentration of carbon dioxide can inhibit the respiration of fresh mushrooms and prolong the shelf life. Pleurotus ostreatus can withstand 25% of carbon dioxide at low temperatures . In the atmosphere control room, there is a process of reducing oxygen and increasing carbon dioxide. The shorter the oxygen reduction period, the better, so that the stored mushroom body can be separated from the high oxygen environment as soon as possible to obtain the best atmosphere control effect.

5. Chemical storage. The chemicals that can be used to store Pleurotus ostreatus are mainly 0.1% sodium metabisulfite, 0.6% sodium chloride, 4 mg of triacontane solution per liter, 50 mg of fresh acid solution per liter , and 0.05 mg of potassium permanganate. Aqueous solution, 0.1 mg of oxalic acid, and the like. The specific method is: first clean the fresh oyster mushroom, soak it in the liquid for 1 to 5 minutes, then remove the drained water, put it into a 0.03cm thick plastic bag (polyethylene), and fasten the bag mouth. Storage.

 

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