The dehydration and drying process is the most important processing technology in the production of valerian products. The production of valerian products using such methods accounts for more than 99.9% of the total production of alfalfa products. Basically, it can be based on how much energy is consumed during the drying process. Divided into three types, namely natural drying method using solar energy as energy source; mixed dehydration drying method using solar energy and chemical energy (or electric energy) as energy sources; and artificial drying method that completely controls the drying process based on chemical energy . Natural Drying The natural drying process means that the entire process is completed in the field, and sunlight can be used for dehydration and drying. The natural drying process has its difficulties in the implementation process. The main reason is that the drying speed of the leaves and stems of the alfalfa is inconsistent. When the leaves have been dehydrated to achieve safe moisture, the water content of the stems is still high. In the further dehydration process thereafter, the leaves are The connecting force of the stem is very small, and slight shaking or handling can cause a lot of loss of the leaves, so that the protein content of the earthworm is drastically reduced, thereby losing the commercial value and the feeding value. In production, stalk squashing technology is often adopted in the cutting process in order to achieve the basic synchronization of drying speeds of stolons and leaves, and to increase the drying speed of the entire roe in field drying. In China, the area with an annual rainfall of 200-300 mm and a frost-free period of about 150 days is generally listed as the most suitable area for the production of thorium products by natural drying. Mixed dehydration drying method The mixed drying method is characterized in that the fresh hoe after the cutting is aired in the field for a certain period of time (depending on the weather conditions), the water content of the mash is reduced to a certain level, and it is sent directly to the processing factory for follow-up. It is dried and processed into the desired grass product. Due to climatic reasons, it is not allowed to continue drying to a safe moisture content, or the air humidity is high, it is impossible to reduce the moisture content of the earthworms to safe storage within 72 hours. The advantage of the mixed drying method is that the energy consumed during the drying is small, and the equipment of the processing plant can be designed to be smaller, so the investment cost and production cost of the fixed assets can be reduced. Artificial drying process, also known as direct drying process, is often used in high moisture areas that are not suitable for the processing of alfalfa products using the "natural dehydration drying method" or "mixed dehydration drying method." This method is used to process various alfalfa products. Artificial drying method is characterized by fast drying speed, only 3 to 10 minutes, the loss of protein is small, but the processing cost is very high. Some studies have shown that grass products (grass bales) produced by the natural drying process have aromas of aromatic amino acids, giving the grass products a fragrant grassy taste, high digestibility of retained proteins, good palatability of grass products, and digestive energy of livestock. High intake. The grass products processed by the artificial drying method undergo high temperature dehydration process. Although the protein is stored in high amounts, the aromatic amino acids are volatilized seriously and the proteins are denatured and the digestibility in the body is reduced. Therefore, in areas with suitable conditions, natural drying should be used to process valerian products. (Source: China Livestock News Yang Hua)
Round Shape Puerh
Tasty Pu'Er Tea,Chinese Pu'Er Tea,Pu'Er Tea
Prettyfly Technology Co., Ltd. , http://www.prettyflytea.com