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CN-122004352-A - Method for increasing oligosaccharide content in pellet feed for pigs

CN122004352ACN 122004352 ACN122004352 ACN 122004352ACN-122004352-A

Abstract

The invention discloses a method for increasing oligosaccharide content in pig pellet feed. The method comprises mixing starch material with water at a mass ratio of 1:1.20, at 68 At 72 ℃, adding the medium temperature alpha Amylase and high temperature resistant alpha The method comprises the steps of carrying out enzymolysis on amylase, directly mixing oligosaccharide solution obtained by enzymolysis with a granular feed raw material for pigs, and carrying out steam tempering, extrusion granulation, ventilation and cooling to obtain the granular feed containing oligosaccharide. The invention combines the process of preparing the oligosaccharide by starch enzymolysis with the production process of pellet feed, omits the high-energy consumption drying link in the traditional oligosaccharide production, obviously reduces the production cost and reduces the width by 35 37 Percent, the oligosaccharide content in the pellet feed obtained by the invention is stabilized at 1.70 2.60 Percent, the water content is not higher than 13.5 percent, meets the safety storage standard, and has good industrial application value.

Inventors

  • Gai Xiangrong
  • LIU YING
  • CHEN GANG
  • QIAO XUEJUAN
  • Li Cuiru

Assignees

  • 北京同力兴科农业科技有限公司
  • 保定德邻居生物科技有限公司

Dates

Publication Date
20260512
Application Date
20260323

Claims (9)

  1. 1. A method of increasing the oligosaccharide content in a pellet feed comprising the steps of: s1, mixing a starch raw material with water according to a mass ratio of 1:1.20; S2, at 68 At 72 ℃, adding the medium temperature alpha Amylase and high temperature resistant alpha Carrying out enzymolysis by amylase; s3, directly mixing the oligosaccharide solution obtained by enzymolysis with the pig pellet feed raw material; s4, performing steam tempering, extrusion granulation, ventilation and cooling to obtain the pellet feed containing the oligosaccharide.
  2. 2. The method according to claim 1, wherein the medium temperature alpha The addition amount of amylase is 0.05 of the total mass of the starch raw material 0.07%; The high temperature resistant alpha The addition amount of amylase is 0.15 of the total mass of the starch raw material 0.20%。
  3. 3. The method according to claim 1 or 2, wherein in step S2, the starch material is added into the enzymolysis tank at a constant speed for 60 hours 80 Minutes; After the starch feedstock has been added, it continues at 68 Constant temperature enzymolysis 40 under 72℃ condition 60 Minutes.
  4. 4. The method according to any one of claims 1 to 3, wherein in step S2, water bath heating is adopted in the enzymolysis process; the enzymolysis tank is internally provided with a stirring device, and the stirring speed is 60 90rpm。
  5. 5. The method according to claim 1 to 4, wherein in step S3, the molecular weight of the oligosaccharides in the oligosaccharide solution is concentrated at 3 The enzymolysis conversion rate is not lower than 98% between 6 glucose units.
  6. 6. The method according to any one of claims 1 to 5, wherein in the step S4, the cooling fan has a power of 1.8 to 2.2 times the conventional power.
  7. 7. The method according to claim 1 to 6, wherein in step S3, the oligosaccharide solution is added in an amount of 22 per ton of feed material 66 Kg; The oligosaccharide content in the final pellet feed was 1.70 2.60% And a water content of not more than 13.5%.
  8. 8. The method according to any one of claims 1 to 7, wherein the starch material is corn starch; the pellet feed raw materials comprise soybean meal, corn, wheat bran and premix.
  9. 9. A pellet feed for pigs, characterized in that the pellet feed is prepared by the method of claim 1 8, The oligosaccharide content of which is 1.70 2.60% And a water content of not more than 13.5%.

Description

Method for increasing oligosaccharide content in pellet feed for pigs Technical Field The invention relates to a method for increasing oligosaccharide content in granulated feed for pigs, belonging to the field of animal feed production. Background The oligosaccharides for animal feed are slow-release metabolizable sugar which can promote the growth of lactic acid bacteria (especially bifidobacterium strictly anaerobism) in intestinal tracts and has good effect on the intestinal health of live pigs (especially weaned pigs). The most typical products are short chain dextrins (also called enzymatic starch oligosaccharides) made from starch, whose main component is small molecules consisting of hexoses, with a molecular weight concentrated in 3-6 glucose units. However, these slow-release metabolizable sugars are relatively expensive to produce, and the current price of oligosaccharides for feed is about 7.2 yuan/kg. The cost of 144 yuan is increased by adding 20 kg of feeding oligosaccharide to each ton of feed. With reference to conventional enzymatic starch production processes, in the final stage of oligosaccharide production (air-drying), as the moisture content decreases, the viscosity of the material increases and drying becomes more difficult. Not only has great energy consumption, but also has extremely high requirements on equipment, and the drying process is the largest cost consumption process of the traditional production process. The invention combines the starch oligosaccharide and the production process of pellet feed, avoids the drying process and directly prepares the pellet feed containing oligosaccharide. Disclosure of Invention The invention aims to provide a method for increasing the content of slow-release metabolizable sugar in granular feed for pigs, which adopts high-temperature enzymolysis of gelatinized starch to obtain high-concentration liquefied starch, then directly adding the mixture into raw materials for producing the pig pellet feed, and finally obtaining the pellet feed through high-temperature tempering, extrusion pelletization and aeration cooling. The content of the slow-release metabolizable sugar (oligosaccharide) in the pellet feed obtained by the method reaches 1.7-2.6%, the production cost is reduced by 35.0-37.0% compared with that of the pellet feed obtained by the conventional method (directly adding the oligosaccharide for feeding), the water content of the pellet feed meets the safety requirements generally accepted by the industry, and the method of the invention avoids the difficulty of drying high-viscosity materials. Not only reduces the energy consumption, but also greatly simplifies the equipment requirements, and has good application value. The method for increasing the content of the slow-release metabolizable sugar in the pellet feed provided by the invention comprises the following steps: s1, mixing a starch raw material with water according to a mass ratio of 1:1.20; S2, at 68 At 72 ℃, adding the medium temperature alphaAmylase and high temperature resistant alphaCarrying out enzymolysis by amylase; s3, directly mixing the oligosaccharide solution obtained by enzymolysis with the pig pellet feed raw material; s4, performing steam tempering, extrusion granulation, ventilation and cooling to obtain the pellet feed containing the oligosaccharide. In the method of the invention, the mass ratio of the starch raw material to water is 1:1.20, and the data are the results determined by repeated experiments. From the analysis of the requirements of the production energy consumption, it should be that the lower the water addition, the better. The smaller the amount of water added, the lower the load for evaporating water in the subsequent cooling. However, from the analysis of the viscosity of the material, it is desirable that the larger the water addition amount is, the better. The larger the water addition amount is, the lower the viscosity of the enzymolysis liquid is, and the more easily the materials are conveyed. In addition, starch gelatinization has a minimum water content below which gelatinization is not possible. The water content selected in the present invention is already above this limit (according to the test results it has been shown that the lowest limit water addition is around 80% of the mass of the starch feedstock). In the method of the invention, the medium temperature alphaThe addition amount of amylase is 0.05 of the total mass of the starch raw material0.07%, The enzyme activity is more than or equal to 2000U/g, the enzyme activity is defined as the enzyme amount required for enzymolysis and liquefaction of 1 gram of starch per hour under the conditions of pH value of 6.0 and 60 ℃ is one enzyme activity unit U; the high temperature resistant alpha The addition amount of amylase is 0.15 of the total mass of the starch raw material0.20 Percent of enzyme activity is equal to or more than 2400U/g, and the enzyme activity is defined as th