How to Dry Shiitake Mushroom/Dehydrate Shiitake Mushroom in a Dehydrator
Introduction to shiitake mushroom：
Shiitake mushroom is the fruiting body of Pleurotus ostreatus. Shiitake is the second largest edible fungus in the world and one of our country's specialties. It is a fungus that grows on wood.
Shiitake mushroom drying process：
Put the pre-dried shiitake mushrooms on the drying tray. After leveling, put the trays in layers on the material truck. The overall height of the material truck is controlled at about 1.7 meters, divided into about 10-13 layers. In this way, the hot air flow is smooth during the drying process, the heating is even, and the drying effect is good.1. Shiitake mushroom preparation drying period
The harvested fresh shiitake mushrooms are preliminarily dried. Dry it in a heat pump dryer at a temperature of 35°C for 1 to 4 hours to reduce its water content by 15-20%. The starting temperature should not be too high or too low, it should be controlled at 35°C. At this time, the air inlet and exhaust holes should be opened, the temperature recovery hole should be closed, and the drying should be carried out for 3-4 hours. Generally, the temperature rises by 1°C-2°C per hour, and the temperature should gradually rise to about 40°C.
2. Constant-speed drying period of shiitake mushrooms
During this drying period, the water diffusion rate inside the fresh mushroom body and the surface evaporation rate are basically the same. Generally speaking, after 4-5 hours of drying, the temperature should gradually rise to about 50°C, about 2°C per hour, and the air intake and exhaust holes are closed by 1/3. This stage is generally dried 3- 4 hours. At this stage, the temperature should be controlled between 40°C and 50°C. During this period, the fresh mushrooms are softened, and with time, the evaporation and hardening of water in the body start from the edge of the fungus and move to the thick part of the center. In this period, the mushroom cover is shaped. Because there is still water in the core of the mushroom during this period, the highest temperature is only 50°C, so the gills will not show a light yellow color.
3. Late drying stage of shiitake mushrooms
During this period, the water in the mushroom body begins to decrease, and the free water is basically exhausted, and part of the bound water is gradually exhausted during the drying process during this period. In this period, the water movement speed in the fresh mushrooms obviously cannot keep up with the surface evaporation speed, and the ventilation rate can be appropriate to save energy. During this period, the drying temperature should be maintained at 50°C- -55%C, which is consistent with the internal and external temperature of the mushroom. The intake and exhaust holes should be closed by 1/2, the temperature recovery hole should be opened by 1/2, and the drying time should be 2 One 3 hours. During this period, the bacteria were light yellow and began to produce fragrance.
Recommendation of shiitake mushroom dryer/drying machine
Commercial 100-3000kg/h large amount of dehydration wide application and easy operation
Heat pump drying machine use the principle of inverse Carnot cycle. It absorbs low-temperature heat energy in the air, which becomes high-temperature heat energy after efficient heat collection and integration by the heat pump system, and is transported to the drying room for cyclic heating and drying of materials.It refers to exhausting the hot and humid air in the drying room directly to the outside of the drying room through dehumidification device, and then replenishing natural fresh air.
Hot air circle drying machine belongs to high temperature heat pump unit. Its working principle is: the working fluid of the heat pump is compressed by the compressor, becomes high temperature and high pressure gas, enters the condenser, condenses and liquefies the heat, and is used for air heating in the drying room. The moisture in the material is vaporized and evaporated by the form of hot air, and the evaporated water vapor is discharged by the moisture discharge system, thereby achieving the purpose of drying the drying material.
Shiitake mushroom drying video：
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