Hot-dip galvanization is a form of galvanization. It is the process of coating iron and steel with zinc, which alloys with the surface of the base metal when immersing the metal in a bath of molten zinc at a temperature of around 840 °F (449 °C). When exposed to the atmosphere, the pure zinc (Zn) reacts with oxygen (O2) to form zinc oxide (ZnO), which further reacts with carbon dioxide (CO2) to form zinc carbonate (ZnCO3), a usually dull grey, fairly strong material that protects the steel underneath from further corrosion in many circumstances. Galvanized steel is widely used in applications where corrosion resistance is needed without the cost of stainless steel, and is considered superior in terms of cost and life-cycle. Galvanized Steel Pipes,Galvanised Pipe,Galvanised Steel Pipe JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.alibabagreenhouse.com
Pests and rodents Pests and diseases can cause feed nutrient loss or leave toxins in the feed. When the temperature is suitable and the humidity is high, the alfalfa is harmful to the feed. Rat damage will not only cause feed loss, but also cause feed pollution and spread diseases.
Microbial contaminated feed breeds harmful microorganisms such as Aspergillus flavus, Penicillium, Gibberella, and Fusarium, producing toxins such as aflatoxins, gibberellins, and zearalenone that are harmful to livestock and poultry. Aflatoxin is the most toxic.
Anti-nutritional factors The main anti-nutritional factors in feeds are protease inhibitors, carbohydrate inhibitors, inhibitors of mineral element bioavailability, antagonistic vitamins, and factors that stimulate the immune system of animals. Their presence can interfere with digestion, absorption, and utilization of feed nutrients by livestock.
The pollution of harmful chemical substances mainly includes three types of harmful chemical substances, such as pesticide pollution, industrial “three wastes†pollution, and nutritive mineral additive pollution.
Non-nutritive additives that contaminate antibiotics, hormones, antioxidants, mildew-proofing agents, and sedatives can play a significant role in preventing disease and improving feed utilization and growth rate, but do not strictly adhere to the principles of use and control the use of objects, safe dosages, and stoppages. Drug time, drugs and their metabolites will remain in meat, eggs, milk, and through the livestock and poultry excrement pollution of the environment.
The poison cross-contamination processing technology produced in the process of processing is not properly controlled, and additives with complex components in the feed will undergo degradation reactions, oxidation-reduction reactions, and generation of some complex compounds in special processing processes such as crushing, conveying, mixing, granulation, and bulking. . Therefore, attention should be paid to cleaning equipment during feed processing to avoid decomposition and residue of the feed in the process of transportation and mixing.
In livestock and poultry breeding, pollution from feeds often results in loss or failure of breeding. Therefore, when using farm feed, the following six kinds of pollution must be strictly prevented: