Storage and fresh-keeping Technology of Pleurotus ostreatus

Fresh Pleurotus ostreatus has high water content and crisp and tender tissue, which is easy to cause damage. If it is not preserved properly, it is easy to rot and deteriorate, causing losses to producers. Here are several storage methods of Pleurotus ostreatus:

1. Fresh storage: the storage time of fresh Pleurotus ostreatus at room temperature is greatly affected by temperature and air humidity. When the room temperature is 3 ℃-5 ℃ and the relative air temperature is about 80%, the fresh mushrooms can be stored for a week. As the temperature increases, so does the humidity. When the amount of mushrooms is small, Pleurotus ostreatus can be put in a jar with a small amount of cold water, and the cylinder mouth can be sealed tightly. Even if the temperature reaches 15 ℃-16 ℃, it can be kept fresh for about a week. Mushrooms can also be completely immersed in cold water, but the water must be clean and hygienic, and the iron content in the water should be less than 2 mg / L, so that Pleurotus ostreatus will not turn black.

two。 Cold storage: the fresh Pleurotus ostreatus fruit body is treated in boiling water or steam for 4-8 minutes, quickly cooled in 1% citric acid solution, drained, packed in plastic bags, stored in cold storage and can be kept fresh for 3-5 days.

3. Controlled atmosphere storage: fresh mushrooms are still breathing after picking, inhaling oxygen and releasing carbon dioxide. Properly reducing the concentration of oxygen in the environment and increasing the concentration of carbon dioxide can inhibit respiration and prolong the shelf life of Pleurotus ostreatus. Pleurotus ostreatus can tolerate 25% carbon dioxide at low temperature. In the controlled atmosphere room, in order to achieve the required gas target, there is a process of reducing oxygen and increasing carbon dioxide, and the shorter the oxygen lowering period, the better. In this way, the stored mushroom can get rid of the high oxidation environment as soon as possible and obtain the best atmosphere control effect.

4. Chemical storage: the main chemicals that can be used to store Pleurotus ostreatus are 0.1% sodium pyrosulfite, 0.6% sodium chloride, 4 mg / L triacontanol aqueous solution, 50 mg / L penicillin aqueous solution, 0.05% potassium permanganate aqueous solution, 0.1% oxalic acid and so on. The specific method is: first, clean the fresh Pleurotus ostreatus, soak it in the medicine solution for 1-5 minutes, remove and drain, put it into a 0.03 mm thick polyethylene plastic bag, and tighten the mouth of the bag for storage.