The summer and autumn are rainy and the climate is humid. The feed and its raw materials are easily deteriorated. Feed safety has become an important task in the summer breeding industry.
The cause of aflatoxin production in
High temperature and high humidity are more suitable for the growth and reproduction of Aspergillus flavus. The moisture content of corn, wheat, rice and other grain feed ingredients is 17%~18%, which is the optimum condition for the growth and reproduction of Aspergillus flavus. It is more suitable for the growth of Aspergillus flavus if the moisture content is too high after pulverization. Therefore, the water content of the feed ingredients should be controlled below the mildew water content. In addition, if the feed ingredients are stored for a long time or the warehouse is wet or leaking, too much inventory is not paid attention to ventilation, drying, cleaning, especially the already pulverized materials. Because the particles are small, it is easy to absorb the surrounding water, it is likely to be yellow. The growth and reproduction of Aspergillus creates a certain temperature and humidity. If the management is improper during the transportation of the feed, rain, moisture, exposure, improper ventilation, and excessive stacking time will also create favorable conditions for the production of aflatoxin.
Strengthen the procurement management of raw materials
Raw material procurement is the first level of quality of feed enterprises. Therefore, procurement management is crucial. Efforts should be made to improve the overall quality of procurement personnel (such as raw material knowledge, raw material management knowledge, professionalism). Purchasing personnel should purchase raw materials in strict accordance with international standards and corporate standards. For raw materials that have been contaminated by aflatoxin or may be contaminated, they cannot be purchased. Do not purchase unqualified raw materials at low prices. Purchasing personnel must strictly check the nutrient index and moisture content of raw materials. Especially the moisture content problem. Corn is the main raw material of finished products. The moisture content of corn directly affects the moisture content of finished products. In the southern rainy season, the moisture content of general raw materials should be less than 12.5%, and the moisture content of corn, sorghum and rice should be controlled below 14%.
Strengthening the storage and transportation of feed and its raw materials
In the process of harvesting, storage and transportation, feed crops should avoid abrasion, crushing, groin and insect bites, especially to avoid damage to the epidermis and outer shell of corn, peanuts and other cereals. The storage room should be protected from excessive humidity, poor ventilation and excessive stacking for too long. In the storage of raw materials, attention should be paid to the control of air, humidity and temperature. The use of the principle of “first in, first out†should be strictly followed to clean up the contaminated raw materials in time. The methods that can be used are: controlling the temperature of the storage environment, blocking oxygen storage, gas storage, low temperature ventilation storage, and radiation. For example, the threshed wet corn is placed in a lining bag lined with a plastic bag, and the bag is filled and tightly sealed to inhibit the growth of Aspergillus flavus, and an antifungal agent (such as propionic acid and its salts, sorbic acid and its salt) may be added. Class, sodium diacetate, etc.). When loading and transporting the feed, make sure that there is no water or moisture in the car. It is best to cover it with rainproof equipment such as canvas when transporting.
attention to the feed production process
The first is the humidity problem. China has a clear regulation on the moisture content of feed products: the moisture content of pig and chicken compound feed is not higher than 14% in the north and not higher than 12.5% ​​in the south. However, if the average temperature is below 10 °C or the delivery period is less than 10 days, or the prescribed amount of anti-mold agent is added to the compound feed, the moisture content can be increased by 0.5%; the moisture content of the pig and chicken concentrated feed is The north is no more than 12%, and the south is no more than 10%. In the production of pellet feed, it is necessary to control the steam quality and the length of the steam pipeline to prevent the condensate from entering the conditioner. The moisture control is better between 15% and 16%. It is necessary to pay attention to the quenching and tempering time. 10~30 minutes, the adjusted powder moisture should not exceed 10%, or the adjusted water content should be less than 0.5% before the adjustment; the cooling equipment should be selected to control the cooling time and cooling temperature; The water content of the feed should be strictly checked before. Followed by the temperature problem, pay attention to the temperature of the control steam (80 °C ± 2 °C); pay attention to the cooling time and ventilation and the speculation of the temperature of the pellets after cooling, to prevent the material temperature from being too different from the room temperature, the material temperature should be high 3 °C~5°C.
Control Valves, the catagory is diverse but play a key role in fluid flow safety, flow adjustment and flow control. Reliable Control Valves,Compressor Relief Valve, Combination Air Valve,Pressure Reducer, Actuated control valves
Control Valves,Compressor Relief Valve,Combination Air Valve,Pressure Reducer, motorized control valves
Zhejiang Philic Fluid Control Co.,LTD , https://www.philicflow.com