In high temperature and high humidity, how should feed manufacturers preserve feed raw materials?
At present, high temperature frequently strikes, and humidity is also rising. Under such weather conditions of double attack of high temperature and high humidity, it is very important for feed manufacturers to preserve feed raw materials. Generally speaking, there are many factors that lead to the deterioration of raw materials during storage. Comprehensive analysis can include raw material moisture, storage temperature and humidity, foreign matter impurities, fat content, insects and molds, and storage facility conditions.
Raw material moisture affects
the moisture content of raw materials. Control the moisture content of raw materials and keep the environment dry. Generally, the moisture content of feed raw materials should not exceed 13%. Feed raw materials with excessive moisture content should be dried in time. The warehouse for storing raw materials should be ventilated, cool, dry, and on a high terrain. The bottom should be supported by wooden frames. The stacking height of bagged raw materials should not exceed 14 layers. Moisture monitoring should be carried out regularly for raw materials that have been stored for a long time, and measures should be taken in time if the moisture content exceeds the standard. The quality control department should pay more attention to the raw materials, check them frequently, and carry out stacking treatment if necessary.
Influence of temperature, humidity and impurities
During the storage process of grain raw materials, the interaction of ambient temperature and humidity affects the quality of raw materials. When the two increase at the same time, the phenomenon of raw material damage can occur in a short time and spread rapidly, which will affect the quality of raw materials. great damage. Grain raw materials such as corn and wheat can generate heat, carbon dioxide and moisture during storage. Generally, grain moisture content is related to its respiration, with a low respiration rate for dry and clean grains and a high respiration rate for high moisture and dirty grains. Therefore, grains with poor cleanliness and high humidity, such as corn and wheat, are prone to generate a large amount of heat and moisture, which will cause serious damage to the quality of the raw materials themselves. For silo corn, personnel should be arranged to inspect the silo in time, and the temperature difference between the silo and the ambient temperature should be paid attention to from time to time. If the temperature difference at individual points is large, ventilation should be carried out in time.
effect of higher fat content
Oxidation easily occurs during storage, and the higher the ambient temperature, the stronger the oxidative decomposition of fat. The oxidation process can make the feed rancid, and the heat released by the reaction can increase the temperature of the feed itself. In the inventory process, focus on high-fat raw materials: such as meat meal, meat and bone meal, fish meal, puffed soybeans and other raw materials. Properly add antifungal agents and antioxidants when necessary.
Insects and molds affect
the mold-contaminated raw materials, which will deteriorate the feed and produce toxins, causing animal poisoning. Aflatoxins are a group of highly toxic and carcinogenic metabolites of Aspergillus flavus. The contamination level of aflatoxin in feed is higher than that of other mycotoxins. Feed raw materials such as corn, peanut cake, sunflower cake, cottonseed cake, and puffed corn are susceptible to Aspergillus flavus. When storing these feeds, special attention should be paid to the water content of the feed itself and the temperature and humidity of the environment to prevent the occurrence of mold. Clean up spilled feed ingredients from time to time to keep the storage site clean and hygienic.
During the storage process of feed raw materials, the humidity must be strictly limited. If it exceeds the allowable upper limit, the raw materials need to be dried naturally or artificially. When the temperature of the storage environment varies greatly between day and night, rainwater leakage is another reason for the dampness of raw materials. Therefore, keeping the warehouse dry and ventilated has become the top priority of storage. When the moisture content of the feed material is less than 15% and the temperature is lower than 20 °C, the quality of the raw material is relatively easy to control, so it is particularly important to grasp the source.
Reasonably arrange production plans and procurement plans, speed up the turnover of raw materials, and shorten the storage time of raw materials as much as possible.
Strengthen the management of the environmental sanitation of the storage site, clean up the waste on the site in time to reduce the environment for pests and microorganisms to breed, and take effective measures to eliminate rodents.