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Detailed Explanation of Key Points for Storing Dried Edible Mushrooms

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1. Drying before storage. The drying of edible mushrooms mainly removes free water between cells. For ease of storage, the moisture content of dried products is generally required to be controlled at 10-13%. Using natural drying or artificial drying methods, the drying process is the process of vaporizing water in the material, that is, water molecules absorb energy and change from liquid to vapor state. Artificial drying is mainly convective drying. The required heat is obtained through continuous or intermittent contact with air or a heated dry air stream, while relying on these air streams to carry away the moisture evaporated from the object, achieving the purpose of drying the material

1. Drying before storage. The drying of edible mushrooms mainly removes free water between cells. For ease of storage, the moisture content of dried products is generally required to be controlled at 10-13%. Using natural drying or artificial drying methods, the drying process is the process of vaporizing water in the material, that is, water molecules absorb energy and change from liquid to vapor state. Artificial drying is mainly convective drying. The required heat is obtained through continuous or intermittent contact with air or a heated dry air stream, while relying on these air streams to carry away the moisture evaporated from the object, achieving the purpose of drying the material. It should be noted that after edible mushrooms are over-dried, if the moisture content of the dried product is too low, it will be hard and brittle, easily crushed by pressure, affecting the appearance quality.

2. Packaging. The commercial packaging of dried edible mushrooms is the basic condition for storage and maintenance. It requires dry packaging materials, tight sealing, pressure resistance, moisture resistance, and moisture barrier, so that the dried products can avoid the influence of the external environment. Generally, food plastic film bags are used for vacuum sealing (or moisture-proof paper) packaging, with wooden boxes or multi-layer corrugated boxes for outer packaging, and the outer seams of the boxes are sealed tightly with adhesive tape. For expensive dried edible mushrooms, tinplate boxes can be used, lined with moisture-proof paper, and the seals can be sealed by welding or adhesive, which can maintain for a longer time, but the packaging cost is high.

3. Storage

1. Scientific stacking: During storage, handle with care and avoid throwing or stacking randomly. A height of 2-2.5 m is appropriate. The top of the stack should be no less than 80 cm from the ceiling, and the stack should be 30 cm from the wall. Leave gaps and walkways, and place wooden blocks under the bottom of the stack for ventilation and moisture protection.

2. Warehouse management: Before goods enter the warehouse or after all stored products are removed, the warehouse or equipment and utensils must be disinfected. Sulfur can be burned for fumigation disinfection, or formalin can be sprayed for disinfection. Firmly prohibit goods that have already become moldy or deteriorated or that have excessively high moisture content and are at risk of mold and deterioration from entering the warehouse.

3. Three protections: The storage of dried edible mushrooms must achieve three protections, namely moisture protection, mold protection, and insect protection. Because dried products easily absorb moisture and become damp, the relative humidity should be strictly controlled within the range of 50-70%, and small bags of quicklime or desiccant can be placed in the boxes to absorb moisture. After dried products become damp, they will soften, then heat up, causing mold, insect infestation, and leading to serious deterioration. When processing dried edible mushrooms, raw materials should be selected well, removing rotten and deteriorated fresh mushrooms, and harvesting and processing promptly to ensure quality. Chemical agents can also be used to kill molds and pests, such as aluminum phosphide, carbon disulfide, etc., but the dosage must be strictly controlled and must be used with caution.

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