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Detailed Explanation of Soft-Packaging Quick-Freezing Fresh-Keeping Technology for Oyster Mushrooms

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Oyster mushrooms have a tender and crisp texture, making them inconvenient to transport and store. Especially during high-temperature periods and peak harvest seasons, if the processing capacity at the place of origin cannot keep up, exporting becomes difficult, and the problem of "difficulty in selling mushrooms" often arises. Therefore, the problems of oyster mushroom sales, transportation, storage, and processing should be fundamentally solved. There are three main traditional methods for storing oyster mushrooms: First, processing them into salted mushrooms for export and domestic sale. However, from the perspective of domestic sales, due to the high salt content, they need to be soaked repeatedly many times before consumption, which is not only time-consuming and laborious, but they still taste too salty when eaten, and the flavor deteriorates, making it difficult for consumers to

Oyster mushrooms have a tender and crisp texture, making them inconvenient to transport and store. Especially during high-temperature periods and peak harvest seasons, if the processing capacity at the place of origin cannot keep up, exporting becomes difficult, and the problem of "difficulty in selling mushrooms" often arises. Therefore, the problems of oyster mushroom @#@136@#@, transportation, storage, and processing should be fundamentally solved.

There are three main traditional methods for storing oyster mushrooms: First, processing them into salted mushrooms for export and domestic sale. However, from the perspective of domestic sales, due to the high salt content, they need to be soaked repeatedly many times before consumption, which is not only time-consuming and laborious, but they still taste too salty when eaten, and the flavor deteriorates, making it difficult for consumers to accept. Therefore, sales are poor. Second, sun-drying or oven-drying. Although oyster mushrooms are easy to preserve this way, they are difficult to restore to their fresh state after soaking, and when eaten they have a hard texture and are high in fiber, with a mouthfeel far inferior to fresh mushrooms. Third, processing them into canned goods. Since oyster mushroom production is seasonal and the supply to market is uneven, it is difficult to guarantee a year-round supply of raw materials, which interrupts the continuity of factory production. The use of soft-packaging quick-freezing fresh-keeping technology can keep the flavor of fresh oyster mushrooms basically unchanged and preserve their nutritional value to the greatest extent. It has the characteristics of being easy to store and easy to transport, and requires very little investment, with a simple method that is easy to master.

The specific operation method of the soft-packaging quick-freezing fresh-keeping technology for oyster mushrooms involves five procedures:

I. Raw Material Selection: Select fresh oyster mushrooms free of impurities, soil, mold, and aging as processing raw materials. The mushroom bodies are required to be intact, with few cracks on the edges of the caps. After fresh mushrooms are harvested, their nutritional components will naturally be lost, so harvesting and processing should be done as promptly as possible, and they should not be left for long.

II. Processing and Rinsing: First, use scissors to separate the whole mushroom cluster into individual fruiting bodies, then trim off the culture substrate attached to the mushroom bodies as well as the yellowed and aged parts, and remove other impurities, soil, firewood, broken leaves, etc. Sort them into bamboo trays according to the size of the mushroom bodies and their degree of maturity. After preliminary processing, place the mushroom bodies in a water tank or vat to rinse, then wash them clean with tap water until they contain no soil and no impurities. During the rinsing process, turn and handle them gently to avoid breaking them.

III. Blanching and Cooling: Add clean water to a large wok and bring it to a boil, then add the washed fresh mushrooms. The amount of fresh mushrooms added should preferably be 20%-30% of the amount of boiling water. Stir in one direction with a strainer or slotted spoon, and turn them when the mushroom bodies become soft. After the pot comes to a boil again, scoop them out and place them in a large vat filled with cold water to cool. The cooling water should be changed frequently. After cooling, scoop them into a sieve to drain the water.

IV. Bagging and Sealing: After the blanched fresh mushrooms are cooled and drained, directly bag the small ones; the large ones can be cut into several pieces with a knife. Then weigh out 1000 grams or 5000 grams respectively and put them into 20×30×0.02 cm or 14×27×0.02 cm non-toxic polyethylene food bags, and seal them with a plastic bag sealing machine. When bagging, be careful that the inner and outer walls of the bag opening do not get water droplets on them. If water droplets get on them, wipe them clean with a clean gauze pad, and then seal, otherwise the seal will not be tight.

V. Frozen Storage: Place the mushroom bags into plastic food boxes or wooden boxes (cardboard boxes are also acceptable), and put them into a cold storage facility (at a temperature of about -18°C). After cooling, they can be taken out at any time for sale or further processing.

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