Aflatoxin is resistant to high temperature and is difficult to be destroyed during the processing of compound feed. When contaminated raw materials are used, the mixed feed is contaminated, which may cause poisoning of humans and animals. The difuran ring structure in the aflatoxin molecule is an important structure for the production of toxins. Studies have shown that the toxic effect of aflatoxin is to interfere with the synthesis of cellular proteins, causing systemic damage to animals.
Aflatoxin is a highly toxic substance, and the median lethal dose of aflatoxin B1 is only 0.36 mg/kg body weight, which is 10 times larger than potassium cyanide. Aflatoxin is the strongest carcinogen found at present, and its carcinogenicity is 900 times that of cream yellow. Its ability to induce liver cancer is 75 times greater than that of dimethylnitrosamine.
How to prevent and control Aflatoxin in the feed production process?
Pay attention to the moisture content. 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; the moisture content of pig and chicken concentrated feed is not higher in the north. 12%, no more than 10% in the South. In feed production, it is necessary to control the steam quality and the length of the steam pipe to prevent the condensate from entering the conditioner. The steam pressure should generally be controlled to 0.35 MPa to 0.4 MPa, and the moisture control is preferably between 15% and 16%. In addition, attention should be paid to the quenching and tempering time of the feed. The pellet feed should generally be controlled for 10 minutes to 30 minutes. The moisture content of the feed should be strictly checked before bagging.
Feed production should pay attention to controlling the temperature of the steam. The temperature is 80 ° C (± 2 ° C) is appropriate, while paying attention to the cooling time and ventilation and speculation of the temperature of the pellet after cooling, to prevent the material temperature and room temperature from being too large. The material temperature should be 3~5 °C.
store. The warehouse where the feed is stored should be ventilated, cool, dry and clean. There is no mold, and the stack should be standardized. It should be kept at a certain distance from the window and wall. If the storage time is long, it should be ventilated regularly. Store feeds with good use of anti-fungal agents. Now use propionate anti-mold agent, the specific method is: the moisture content of the sealed package of 12.5% ​​~ 13.5% of the pellets stored for more than 1 month, should add 0.3% calcium propionate; moisture in the 11.55% ~ 12.5% If the powder is stored for more than 2 months, add 0.15% calcium propionate. In the southern part of the country, due to more rain in summer, it is best to add 0.2%~0.4% calcium propionate or sodium propionate. In addition to propionic acid and its salts, sorbic acid and its salts, benzoic acid and sodium benzoate, formic acid and sodium formate, calcium formate can also be used. At present, a composite antifungal agent is frequently used internationally.
transport. When loading and transporting the feed, make sure that there is no water or moisture in the car. It is best to cover the rainproof equipment such as canvas when transporting, one can prevent rain, and the other can prevent sun exposure. When unloading, pay attention to the top layer of feed or the wet or broken bag on the top, so as to use it early.
GB 3:1 Court-Materials Two-Component Binder-Green
Polyurethane Adhesive Material,Polyurethane Adhesive Features,Sports Court Surface Materials,Polyurethane Adhesive Price
Zibo Century Union New Building Materials Co.,Ltd , https://www.cum-sports.com