CN1127077A

CN1127077A - Method of producing detoxicated cottonseed protein fodder

Info

Publication number: CN1127077A
Application number: CN95112171A
Authority: CN
Inventors: 伍智文; 王统柱; 连恒才; 韩祥铭; 刘克长; 汤珍山
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-10-25
Filing date: 1995-10-25
Publication date: 1996-07-24

Abstract

The concrete process of the invented method is as follows: in the crushed cotton seed cake, 5-10% of composite synergistic detoxicating agent is added in, after mixing thoroughly it is fed into the reaction retort, the saturated steam is introduced, when the pressure reaches to 0.3-0.5 MPa, temperature raises to 120-140 deg.C, the discharging valve is suddenly released, under the high pressure puffing action, the residue free gossypol in the detoxicated cotton seed cake is lower than 0.03%. The composite detoxicating agent is composed of 10% of zinc sulfate, 20% of ferrious sulfate, 1-5% of ammonium hydrogen phosphate and 60-65% of rare earth bearing natural forage mineral.

Description

A kind of method of producing detoxicated cottonseed protein fodder

The invention belongs to the processing and manufacturing of animal and fowl fodder.

China is the cotton state of product the biggest in the world, and after the annual cottonseed oil expression, the cotton cake dregs of output surpasses 4,000,000 tons, is the protein feed resources of a preciousness.But because cotton cake dregs contains a kind of toxin---free gossypol of removing of being difficult for very much, to contain crude fibre higher for cotton cake dregs in addition, the amino acid of cottonseed protein is also uneven, these factors also on the low side such as trace element that animal is essential and calcium, phosphorus have seriously restricted the application of cotton cake dregs on feed, become the difficult problem that people generally acknowledge.FAO (Food and Agriculture Organization of the United Nation) has just worked out cotton cake dregs detoxification standard as far back as nineteen fifty-seven, but has gone over half a century, fails to resolve the industrial-scale production problem of cotton cake dregs detoxification all the time.

The present invention the generation of fully having studied the cotton cake dregs toxin and make malicious mechanism and the molecular characterization and reactivity worth of free gossypol (toxin) after, a kind of physics has been proposed---the detoxification new method that chemistry combines, and especial manufacture a kind of compound detoxification agent with multiple function, the research of repeatedly practising through nearly 3 years, prove that its detoxication uses is obvious, virus elimination rate is stabilized in more than 90%, cottonseed cake residual free gossypol after the detoxification reaches the purpose as feed fully below 0.03%.

Novelty of the present invention is: the compound detoxification agent of adding can remove the free gossypol toxin effectively and can augment calcium, phosphorus and the various trace elements of cottonseed cake again and make amino acid whose composition more become reasonable.In addition, because the crude fibre through certain temperature, pressure and expanded effect cotton cake dregs reduces by 3-4% in the detoxification process, the palatability of animal is also obviously improved, this is other poison-removing method effect that is beyond one's reach.

Main points of the present invention are to utilize physics---the method that chemistry combines reaches the purpose of detoxification.Wherein detoxifying agent is crucial.Expanded jointly under certain temperature and pressure when the detoxifying agent of cottonseed cake and adding, the detoxifying agent of this moment has been given play to maximum effectiveness.

Existing oneself finds out, the toxicity of cottonseed cake is come former in free gossypol (FgeegOSSYPOI), and the content in cotton cake dregs is generally 0.1---0.4%.Its molecular structure can be expressed as:

From molecule tangerine structure as can be seen, just because of having two activity hydroxies and aldehyde radical, thereby have stronger physiologically active, the intoxicating effect of gossypol produces thus.

Lot of experiments shows, free gossypol have two attributes should, one be " thermal sensitivity ", after reaching uniform temperature, free gossypol just decomposes, oxidation, loses activity, and with the rising of temperature, reaction quickening, detoxification efficiency raising.It two is " chelating effect ".The active group of free gossypol easy and some metal ion and active amino generation chelating effect become a kind of deactivated " in conjunction with continuous phenol ", and this chelating effect is also accelerated with the rising of temperature.Superfluous compound is more stable when multiple metal ion exists, more favourable being removed away.The process route design of the expanded synergy detoxification of steam hot pressing, selected with the above-mentioned reaction mechanism that satisfies free gossypol.The uniformity of theory analysis and practice is the assurance of success of the present invention.

Produce the process chart of detoxicated cottonseed protein fodder:

The embodiment of the invention:

Main equipment: steam autoclave (retort)

The main technique technical parameter: steam pressure keeps: 0.45-0.80MPa

Single jar of reaction time: 3-4min

Running current: 6-18A

Rated output: 1000Kg/h

The compound detoxification agent contains the natural feeding mineral composition of rare earth by accounting for 10% zinc sulfate, 20% ferrous sulfate, 1-5% ammonium hydrogen phosphate and 60-65%.

The novelty of this achievement in research just is to find a kind of having multi-functions taking off Toxic agent, it can remove the toxin (free gossypol) in the cotton cake dregs effectively, again The auxotrophy of cottonseed cake be can augment, phosphorus, calcium macroelement and iron, zinc, selenium comprised Deng trace element, protein content also can improve 3-4%, and the coarse-fibred human relations rate that disappears is carried High by 50%, in addition, the animal palatability of cottonseed cake also has clear improvement. Through this Cotton cake dregs after " one take off two increase three change " is on nutritional labeling and feeding effect ten Divide near soybean cake. Utilize the disposable input of a kind of additive (claiming detoxifying agent herein) Can bring into play simultaneously multiple efficacies, this be till the present other cottonseed cake detoxifying agent be difficult to reach Arrive.

The present invention is simple for process, and treating capacity is big, the virus elimination rate height, and production cost is low, Product nutrition after the detoxification is significantly improved. The invention solves both at home and abroad and be difficult to The difficult problem of the cottonseed cake detoxification industrial-scale production that solves is the comprehensive utilization of cottonseed cake With having opened a new way out-of-the-way, have high practical value and dissemination.

Claims

1, a kind of method of producing detoxicated cottonseed protein fodder, it is characterized in that the cotton cake dregs that will pulverize adds the composite synergistic detoxifying agent, through steam hot pressing, expanded detoxification, make free gossypol content again, become the cottonseed protein fodder that meets national forage health standard below 0.03%.

2, a kind of method of producing detoxicated cottonseed protein fodder according to claim 1 is characterized in that the composite synergistic detoxifying agent forms by accounting for 10% zinc sulfate, 20% ferrous sulfate, 1-5% ammonium hydrogen phosphate and 60-65% natural feeding rare-earth mineral.

3, a kind of method of producing detoxicated cottonseed protein fodder according to claim 1 is characterized in that the composite synergistic detoxifying agent accounts for 5-10% of cotton cake dregs total amount.