Fresh-keeping processing of Lentinus edodes

1. Drying equipment:

At present, although the drying equipment of Lentinus edodes at home and abroad is different in form, scale and technical level, its principle is basically the same. There are generally the following models:

(1) forced circulation dryer

(2) forced ventilation parallel flow dryer

(3) heat pump dryer.

2. Drying method

(1) Raw material treatment

Before drying, cut off the stalk or stalk of the fresh mushroom, remove impurities, classify and process. Mushrooms picked in rainy days or with high water content should be spread out first so that the water content is reduced from 90% to 75%-80% before drying.

(2) Raw materials on the machine

The mushrooms picked on the same day should be dried on the same day, and the fresh mushrooms should be packed into a sieve rack. When the temperature in the machine rises to 40 ℃-45 ℃, spread the mushroom sieve rack into the dryer.

(3) drying temperature

Mastering the temperature is the key to the drying technology. Forced ventilation, the temperature can be gradually increased from 40 ℃ to 60 ℃, such as natural ventilation, 35 ℃-60 ℃. The temperature should rise slowly, and it is generally appropriate to dehydrate and dry at the evaporation rate of 6% per hour. If the temperature is too high, strengthen the surface evaporation intensity, the internal diffusion can not keep up, the interior of Lentinus edodes is gelatinous, and the central part of the mushroom umbrella is often boiled black, reducing the quality of the product.

(4) ventilation and exhaust

In order to achieve a certain degree of air exchange in the drying process, the wind speed at the wet tail of the drying equipment should reach 0.5m / s. At the same time, we should pay attention to the relationship between temperature and ventilation.