Method for removing fine hair and removing phenols from cottonseed meal

Abstract

The invention discloses a method for removing fine hair and phenols from cottonseed meal. The method comprises the following steps of selecting starch and cottonseed meal, mixing the selected starchwith the selected cottonseed meal, adding water, performing thorough mixing so that the starch is sufficiently adhered onto the cottonseed meal, and then performing extrusion puffing treatment on mixed materials. Compared with the prior art, the method disclosed by the invention has the characteristics that corn flour which is low in cost, easy to obtain but high in starch content is mixed with the cottonseed meal, and extrusion puffing treatment is performed for removal of fine hair and phenols, so that the production cost is effectively reduced; when the corn flour is mixed with the starch and the extrusion puffing treatment is performed, requirements for temperature and pressure of equipment are low, production needs are easy to meet, and the production cost is low; the fine hair removal rate and the phenol removal rate of the cottonseed meal are in positive correlation with the content of the starch, the fine hair removal effect and the phenols removal effect are quite significant,and when the content of the cottonseed meal reaches 65%, dissociated gossypol is hardly detected; and the starch in a mixed feed after fine hair removal and phenol removal by the method disclosed bythe invention is easy to absorb and digest, and the palatability is also greatly improved.

Description

technical field [0001] The invention relates to a method for delinting and dephenolizing cottonseed meal. Background technique [0002] my country is a major cotton-producing country in the world. Cotton meal is rich in protein. The protein content in cotton meal is about 44%, which is equivalent to that of soybean meal, but the price of cotton meal is about 40% lower than that of soybean meal. It is a very Good protein nutritional resources can completely replace soybean meal protein as animal feed, not only meet the same nutritional needs at a lower price, but also promote the comprehensive utilization and green development of agricultural products, and have broad market prospects. [0003] However, the content of gossypol in cottonseed meal is relatively high, with an average of about 900 mg of gossypol per kilogram of cottonseed meal. Gossypol is toxic, and excessive intake will cause discomfort or even poisoning in animals. The existing dephenolization technology mainly ...

AI Technical Summary

Problems solved by technology

[0003] However, the content of gossypol in cottonseed meal is relatively high, with an average of about 900 mg of gossypol per kilogram of cottonseed meal. Gossypol is toxic, and excessive intake will cause discomfort or even poisoning in animals. The existing dephenolization technology mainly includes physical extraction 1, chemical dephenolization and biological fermentation three aspects, physical extraction and chemical dephenolization have higher dephenolization rate, but feed palatability is poor, and there are drug residue problems, biological fermentation method has good palatability, but the dephenolation rate is unstable, Production costs are also higher

[0004] Cotton meal also contains about 20% cotton lint, which can block the intestinal tract of animals, slow down the flow of chyme, and cause indigestion in animals. The harm of lint to monogastric animals is particularly obvious, but the existing delint technology There are chemical delinting and physical delinting. Chemical delinting is acid delinting, which mainly uses strong acid to carbonize the remaining velvet on the surface of cottonseed to become brittle and fall off. The flame combustion method burns off the remaining velvet on the surface of the cottonseed, and the use of chemical methods will leave chemical reagents remaining, which will affect the consumption of animals, and the existing physical methods will also affect the palatability of the feed

[0005] Moreover, the dephenolization and delint removal of cottonseed meal are carried out separately at present, so not only the production cost is high, but also the process is complicated and the duration is long

Images