1 Preheating for 90 minutes in advance
The preheating time is determined according to different ambient temperatures. The main reason is that temperature rise needs to be carried out in a step-by-step method. Preheating is very important. The drying temperature should set at 46°C at the beginning and should continue for 90 minutes, and then the temperature is gradually raised to about 60°C. If the preheating temperature is too high, the bamboo shoots may burst into pulp.
2 drying & dehumidification mode for 300 minutes
The temperature is set to 45°C, the humidity is set to 50%, the drying room is kept at a constant humidity and at a stable temperature, and the relative humidity in the drying room is kept at 68%.
3 Drying & dehumidification: the temperature rises to about 55 ℃
After entering the bamboo shoot drying mode, dehumidify it for 30 minutes and stop for 5 minutes, and keep the relative humidity in the drying room at 50%. This mode should keep for 6 hours. At this stage, the color of the bamboo shoots is fixed to ensure that the color of the bamboo shoots is golden yellow.