Shiitake mushrooms contain rich nutrients such as protein, fat, carbohydrate, crude fiber, ash, calcium, phosphorus, iron, thiamine, riboflavin, and niacin. In l00g dried mushrooms also contains 260mg of vitamin D mother, it becomes vitamin D after exposure to sunlight, helps children's bones and teeth growth. Mushrooms contain adenine, which prevents cirrhosis. It can also be used to lower blood pressure, reduce cholesterol and nourish the body. Therefore, mushrooms have become one of the health vegetable. Harvesting and processing of mushrooms is an extremely important part of the production of mushrooms. Appropriate harvesting and reasonable processing can not only increase production, improve quality, but also meet market demand and improve the international competitiveness and market share of this specialty product. First, the mushroom harvesting (a) harvesting standards generally seven or eight mature degrees. In other words, the mushroom umbrella has not been fully opened yet, and the edge of the cap is still in the most suitable for harvesting when it turns into the “copper rimâ€. (b) When harvesting mushrooms, use the thumb and index finger to pinch the base of the mushroom stalk, rotate it left and right, gently unscrew it, do not bump around the surrounding mushrooms, and do not leave the mushrooms in the mushrooming position to prevent infection after rotting. Insects, diseases, and effects of future fruiting. (3) Harvest time The mushrooms collected by sunny days have less moisture and good color. The mushroom collected in rainy weather has a high moisture content and is difficult to dry, and the baking color tends to be black, and the processing quality is difficult to grasp. Therefore, the best choice for picking mushrooms sunny. (4) Precautions 1. After shiitake mushrooms are harvested, they must be handled with care and lightness to prevent them from being damaged by extrusion, discoloration and affect the quality. 2. After shiitake mushrooms are harvested, if they are unprocessed and dried, they must be spread on a dry and ventilated floor in a timely manner, or be spread in a cool, dry place with a drying pad. Do not pile them together to avoid blackening. Second, the processing of mushrooms (a) dried mushrooms drying methods are sun, baking, sun and baking combined three methods. 1. Dry in the sun. The harvested shiitake mushrooms are timely laid out on the drying grain field or cement floor in Xiangyang, or spread on the drying pad of the dry sunny land. When drying, the mushroom shall be covered upwards, and the mushroom shank should be turned downwards. One by one, the stalks should be opened. After drying to the half dry state, the stalks should be turned upwards and the stalks should be covered downward until 90% dry. In case of cloudy, rainy days, make up for fire drying. 2. Baking and Drying (1) First divide the mushrooms in large, medium, and small categories and place them in a baking tray. When the mushrooms are placed, the mushrooms are covered with the mushrooms facing upwards and the mushroom shank is facing downwards. During the baking, the large mushroom plate is mounted on the top layer, the small mushroom plate is mounted on the bottom layer, and the middle mushroom plate is placed on the middle layer. (2) When the fire is fired, the firepower must be low first, then high, not too fierce, and start to burn to 30°C. After that, the temperature rises by 5°C every 3-4 hours, and finally it is maintained at about 60°C. The maximum is not more than 65°C; the firepower is too fierce. The mushrooms will be roasted and burned, the firepower will be insufficient, the time will be prolonged, and the mushrooms will become black and deteriorate. (3) When the mushrooms are baked to 80% dry, they will be removed from the baking room, placed in a dry place for 12 hours, and then re-roasted for 3-4 hours to reach the drying requirement. Each bake takes 12-18 hours. (4) Baking stoves can be firewood, coal fire, charcoal fire, but the barns must be smoke-free, no fire, it is best to have a cooling iron plate device, and exhaust equipment to prevent mushrooms cooked, Grilled black. 3. Sun baking combined. On sunny days, fresh mushrooms can be placed in the sun and dried for about 6 hours or so. Then they can be baked in fire until they are dry. In cloudy and rainy days, if the baking equipment is limited, you can also put the mushrooms in a dry and dry place. Dry the surface moisture on the mat or floor and turn it into baking. 4. Product quality standards. Strong odor, good color (brown cover is brown, light yellow pleats), bacteria fold clear without breaking water content of about 13%. (B) grading and storage of dried mushrooms is easy to absorb moisture, mold deterioration and growth, poor preservation of quality. Therefore, after the mushrooms are dried, they should be immediately sorted according to the size and thickness of the mushrooms. After grading, they should be packaged quickly or be sealed in a plastic bag and stored in a cool and dry place.
our company has ran Mineral Products Trading many years,we have close relationship with them,The relationship between mankind and chemical industry is very close,
universal access to all aspects of life. In modern life, chemical
products can not be obtained almost anytime, anywhere. From the material
life such as clothing, food, shelter and transportation to the
spiritual life such as culture and art, entertainment and so on, all
require chemical products to serve them. Some chemical products play an
epoch-making role in the history of human development. Their production
and application even represent a certain historical stage of human
civilization.
As a category of knowledge, chemical industry has many kinds of
decomposition or comprehensive classification methods in different
historical periods and under different demands. According to the source
of raw materials, product classification, but also in accordance with
the law of history, history classification. Each division method is
difficult to strictly adapt.
This volume seeks to reduce unnecessary crossings, a comprehensive classification of methods designed from the raw materials of fuel chemical branches; from the product of inorganic chemicals, basic organic chemicals, polymer chemicals, fine chemicals and other branches; from the common The branch of chemical engineering proceeding from the regularity of the process, and the comprehensive branch proceeding from historical development and horizontal linkages. Fuel chemical raw materials are oil, natural gas, coal and oil shale and other combustible minerals, so it is divided into petroleum refining industry, petrochemical, natural gas chemical, coal chemical and shale oil industry.
Among them, the oil refining industry is to create a higher output value of the industrial sector is the country's important economic lifeline. Natural gas is often symbiotic with petroleum and natural gas chemical industry is often attributed to petrochemical industry. At this stage, oil refining and petrochemicals are the main fuel chemical industry. Products produced by the fuel and chemical industries include fuels and chemical raw materials, which are mainly organic chemical raw materials (except for the syngas used in the production of inorganic chemicals such as synthetic ammonia). Therefore, the petrochemical industry is also a major part of the basic organic chemical industry.
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