CN110720554A - Method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by using crop straw particles - Google Patents
Method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by using crop straw particles Download PDFInfo
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- A—HUMAN NECESSITIES
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- A23K10/00—Animal feeding-stuffs
- A23K10/20—Animal feeding-stuffs from material of animal origin
- A23K10/26—Animal feeding-stuffs from material of animal origin from waste material, e.g. feathers, bones or skin
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- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
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- A23K10/30—Animal feeding-stuffs from material of plant origin, e.g. roots, seeds or hay; from material of fungal origin, e.g. mushrooms
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- A23K40/00—Shaping or working-up of animal feeding-stuffs
- A23K40/10—Shaping or working-up of animal feeding-stuffs by agglomeration; by granulation, e.g. making powders
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Abstract
The invention provides a method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by utilizing crop straw particles, which comprises the following steps of 1) preparing mixed feed particles, ① airing and drying crop straws, then crushing and granulating to obtain crop straw particles, ② using the crop straw particles as packing materials to adsorb the livestock and poultry excrement and urine, controlling the humidity of the packing materials to be below 50% to obtain premix, stirring and airing the premix, and granulating to obtain mixed feed particles, 2) feeding apple snails, namely feeding the apple snails by using the mixed feed particles prepared in the step 1), 3) separating meat and shells, ① till the apple snails grow mature, harvesting adult apple snails, ② boiling and curing the obtained adult apple snails in water, and then separating the meat and shells to obtain spiral shells and spiral meat, and 4) crushing, drying and crushing the spiral shells to obtain the biological calcium powder.
Description
Technical Field
The invention relates to a resource utilization method of crop straws, in particular to a method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by using crop straw particles.
Background
Agricultural wastes are a general term for wastes discharged in agricultural production, agricultural product processing, livestock and poultry breeding industry and rural residents.
In recent years, crop straws become a new source of pollution in rural areas. According to incomplete statistics, the Chinese as a big agricultural country can produce more than 7 hundred million tons of straws every year, and becomes 'waste' which is not used much but needs to be disposed.
The traditional treatment method generally adopts incineration treatment, harvesting and stacking or landfill treatment, and the incineration treatment can generate a large amount of dense smoke which is forbidden at present; the stacking treatment occupies a large area, is difficult to store, and easily brings potential safety hazards when the weather is dry; the landfill treatment causes resource waste and the like.
In addition, the feces and urine of livestock and poultry produced in livestock and poultry breeding industry also become a big problem of environmental pollution at present.
With the further development of society, agricultural waste treatment has become a focus of attention in recent years. How to reasonably treat the agricultural wastes and utilize the residual value of the agricultural wastes to reduce the environmental pollution becomes a problem which needs to be solved urgently.
Disclosure of Invention
The invention aims to provide a method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by utilizing crop straw particles, so that the crop straw and the livestock and poultry excrement and urine are changed into valuable substances.
The technical scheme adopted by the invention is as follows:
the invention provides a method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by using crop straw particles, which comprises the following steps:
1) preparing mixed feed particles:
① drying the crop straw, pulverizing, and granulating to obtain crop straw granule;
②, using the crop straw particles as padding to adsorb livestock and poultry manure, controlling the humidity of the padding to be below 50% to obtain premix, stirring and airing the premix, and granulating to obtain mixed feed particles;
2) feeding apple snails: feeding apple snails by adopting the mixed feed particles prepared in the step 1);
3) meat shell separation:
① when the apple snails are mature, harvesting adult apple snails;
② cooking mature apple snail, and separating meat from shell to obtain snail shell and snail meat;
4) crushing: and drying and crushing the spiral shell to obtain the biological calcium powder.
Further, in the step 2), the feeding process controls the water temperature to be 20-25 ℃, and controls the pH value of the water to be 7.2-7.8.
Further, the method also comprises the following steps: in the process of feeding the apple snails, a proper amount of nitrobacteria needs to be added.
Further, the crop straw comprises: wheat straw, corn straw, rice straw.
Further, the livestock and poultry manure and urine comprise manure and urine of the same livestock and poultry.
The invention preferably adopts the excrement and urine of the same livestock and poultry, and optionally, the livestock and poultry excrement and urine comprises 45-55% of rabbit excrement and 45-55% of rabbit urine by weight ratio, or the livestock and poultry excrement and urine comprises 45-55% of cow excrement and 45-55% of cow urine by weight ratio.
Further, the method also comprises the following steps: and drying and crushing the snail meat to obtain the snail meat powder.
Further, the method also comprises the following steps: and (3) airing and crushing the metabolic products of the apple snails, and mixing the crushed products with soil to prepare the nutrient soil.
Furthermore, in the nutrient soil, the soil accounts for 75-85% by weight, and the metabolic products of the apple snails account for 15-25% by weight.
Further, the crop straw particles comprise, by weight: 30-40% of wheat straw particles, 30-40% of corn straw particles and 30-40% of rice straw particles.
The invention has the beneficial effects that:
1. the invention provides a method for producing biological calcium powder by adsorbing livestock and poultry manure with crop straw particles, which changes crop straw and livestock and poultry manure into valuable.
2. According to the embodiment of the invention, the crop straw particles are used as the packing materials to adsorb livestock and poultry excrement and urine, so that pathogenic bacteria and the like in the livestock and poultry excrement and urine can be killed, and the research of the inventor finds that the mixed feed particles formed by the crop straw particles and the livestock and poultry excrement and urine can meet the dietary requirements of apple snails and can enhance the calcium content of the snail shells, so that the calcium content of the mature apple snail shells is extremely high when the apple snails are fed by the mixed feed particles, the snail shells are dried and crushed, and the calcium content of the finally obtained biological calcium powder reaches more than 30%.
3. The livestock and poultry manure is adopted to comprise the manure and urine of the same livestock and poultry, so that the pathogenic bacteria in the livestock and poultry manure can be completely killed, the mixed feed particles can be purified, the appetite of the apple snails can be improved, and the content of the biological calcium powder and the protein content of the snail meat are increased.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only examples of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for producing biological calcium powder by adsorbing livestock and poultry manure with crop straw particles according to a first embodiment of the present invention;
FIG. 2 is a schematic flow chart of a method for producing bio-calcium powder by adsorbing livestock and poultry manure with crop straw particles according to a second embodiment of the present invention;
FIG. 3 is a schematic flow chart of a method for producing bio-calcium powder by adsorbing livestock and poultry manure with crop straw particles according to a third embodiment of the present invention;
fig. 4 is a schematic flow chart of a method for producing biological calcium powder by adsorbing livestock and poultry manure with crop straw particles according to a fourth embodiment of the invention.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described in conjunction with the embodiments below, so that the objects, the features, and the effects of the present invention can be fully understood. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention.
The first embodiment of the invention provides a method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by using crop straw particles, which comprises the following steps:
1) preparing mixed feed particles:
① air-drying and drying the crop straws, pulverizing the three kinds of straws into strips with a length of 1-2 cm by a hammer mill, pulverizing the strips to obtain straw powder, and granulating by a granulator to obtain crop straw particles;
② taking crop straw particles as padding, adsorbing livestock and poultry manure with the padding, controlling the humidity of the padding to be below 50% to obtain premix, stirring and airing the premix, and granulating to obtain mixed feed particles;
2) feeding apple snails: feeding apple snails by adopting the mixed feed particles prepared in the step 1);
3) meat shell separation:
① when the apple snails grow to maturity, harvesting the adult apple snails;
② boiling adult apple snail in water, and separating meat from shell to obtain shell and meat;
4) crushing: drying and crushing the snail shells to obtain the biological calcium powder.
In one embodiment, in step 2), the feeding process controls the temperature of water at 20-25 ℃ and the pH value of water at 7.2-7.8.
In one embodiment, the method further comprises the following steps: in the apple snail feeding process, a proper amount of nitrobacteria needs to be added. Optionally, the nitrifying bacteria account for 1-2% by weight of the total mixed feed pellet.
In one particular embodiment, the crop straw comprises: wheat straw, corn straw, rice straw.
In one embodiment, the livestock manure comprises manure and urine of the same livestock.
The invention preferably adopts the excrement and urine of the same livestock and poultry, and optionally, the livestock and poultry excrement and urine comprises 45-55% of rabbit excrement and 45-55% of rabbit urine by weight ratio, or the livestock and poultry excrement and urine comprises 45-55% of cow excrement and 45-55% of cow urine by weight ratio.
A second embodiment of the present invention is the first embodiment, and further includes the steps of: and drying and crushing the snail meat to obtain the snail meat powder.
A third embodiment of the present invention is the first embodiment, and further includes the steps of: and (3) airing and crushing the metabolic products of the apple snails, and mixing the crushed products with soil to prepare the nutrient soil.
A fourth embodiment of the present invention is the second embodiment, and further includes the steps of: and (3) airing and crushing the metabolic products of the apple snails, and mixing the crushed products with soil to prepare the nutrient soil.
In a specific embodiment, the nutrient soil comprises 75-85% of soil and 15-25% of metabolic products of apple snails by weight percentage.
In a particular embodiment, the crop straw particles comprise, in weight percent: 30-40% of wheat straw particles, 30-40% of corn straw particles and 30-40% of rice straw particles.
The following are specific examples.
Example 1
The embodiment 1 of the invention provides a method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by using crop straw particles, which comprises the following steps:
1) preparing mixed feed particles:
① air-drying and drying wheat straw, corn straw and rice straw, pulverizing the three straws into strips with length of 1 cm by a hammer mill, pulverizing the strips to obtain straw powder, and granulating by a granulator to obtain crop straw particles;
the crop straw particles comprise the following components in percentage by weight: 30% of wheat straw particles, 30% of corn straw particles and 40% of rice straw particles.
②, using crop straw particles as padding to adsorb fresh livestock and poultry manure, controlling the humidity of the padding to be 50% to obtain premix, stirring and airing the premix, and granulating to obtain mixed feed particles;
the livestock and poultry manure comprises 45% of rabbit manure and 55% of rabbit urine in percentage by weight.
2) Feeding apple snails: the apple snails are fed by the mixed feed particles prepared in the step 1), the water temperature is controlled at 20 ℃ in the feeding process, the pH value of the water is controlled at 7.2, and nitrobacteria are added, wherein the nitrobacteria account for 1% of the whole mixed feed particles.
3) Meat shell separation:
① when the apple snails grow mature, harvesting the adult apple snails by using a nylon net;
② boiling adult apple snail in water, and separating meat from shell to obtain shell and meat;
4) crushing: drying and crushing the snail shells to obtain biological calcium powder; and drying and crushing the snail meat to obtain the snail meat powder. In addition, products obtained after metabolism of apple snails are aired, crushed and mixed with soil to prepare the nutrient soil.
According to the embodiment of the invention, the metabolic products of the apple snails are aired, crushed and mixed with soil to prepare the flower nutrient soil, wherein the flower nutrient soil comprises 75% of soil and 25% of metabolic products of the apple snails in percentage by weight.
Example 2
The embodiment 2 of the invention provides a method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by using crop straw particles, which comprises the following steps:
1) preparing mixed feed particles:
① air-drying and drying wheat straw, corn straw and rice straw, pulverizing the three straws into strips with length of 2 cm by a hammer mill, pulverizing the strips to obtain straw powder, and granulating by a granulator to obtain crop straw particles;
the crop straw particles comprise the following components in percentage by weight: 30% of wheat straw particles, 40% of corn straw particles and 30% of rice straw particles.
②, using crop straw particles as padding to adsorb fresh livestock and poultry manure, controlling the humidity of the padding to be 45% to obtain premix, stirring and airing the premix, and granulating to obtain mixed feed particles;
the livestock and poultry manure comprises 55% of cow manure and 45% of cow urine by weight ratio.
2) Feeding apple snails: the apple snails are fed by the mixed feed particles prepared in the step 1), the water temperature is controlled at 25 ℃ in the feeding process, the pH value of the water is controlled at 7.8, nitrobacteria are added, and the nitrobacteria account for 2% of the whole mixed feed particles.
3) Meat shell separation:
① when the apple snails grow mature, harvesting the adult apple snails by using a nylon net;
② boiling adult apple snail in water, and separating meat from shell to obtain shell and meat;
4) crushing: drying and crushing the snail shells to obtain biological calcium powder; and drying and crushing the snail meat to obtain the snail meat powder. In addition, products obtained after metabolism of apple snails are aired, crushed and mixed with soil to prepare the nutrient soil.
According to the embodiment of the invention, the metabolic products of the apple snails are aired, crushed and mixed with soil to prepare the flower nutrient soil, wherein the flower nutrient soil comprises 85% of soil and 15% of metabolic products of the apple snails in percentage by weight.
Example 3
The embodiment 3 of the invention provides a method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by using crop straw particles, which comprises the following steps:
1) preparing mixed feed particles:
① air-drying and drying wheat straw, corn straw and rice straw, pulverizing the three straws into strips with length of 1.5 cm by a hammer mill, pulverizing the strips to obtain straw powder, and granulating by a granulator to obtain crop straw particles;
the crop straw particles comprise the following components in percentage by weight: 40% of wheat straw particles, 30% of corn straw particles and 30% of rice straw particles.
②, using crop straw particles as padding to adsorb fresh livestock and poultry manure, controlling the humidity of the padding to be 40% to obtain premix, stirring and airing the premix, and granulating to obtain mixed feed particles;
the livestock and poultry manure comprises 50% of rabbit manure and 50% of rabbit urine in percentage by weight.
2) Feeding apple snails: the apple snails are fed by the mixed feed particles prepared in the step 1), the water temperature is controlled at 23 ℃ in the feeding process, the pH value of the water is controlled at 7.5, and a proper amount of nitrobacteria is added, wherein the nitrobacteria accounts for 1.5% of the whole mixed feed particles.
3) Meat shell separation:
① when the apple snails grow mature, harvesting the adult apple snails by using a nylon net;
② boiling adult apple snail in water, and separating meat from shell to obtain shell and meat;
4) crushing: drying and crushing the snail shells to obtain biological calcium powder; and drying and crushing the snail meat to obtain the snail meat powder. In addition, products obtained after metabolism of apple snails are aired, crushed and mixed with soil to prepare the nutrient soil.
According to the embodiment of the invention, the metabolic products of the apple snails are aired, crushed and mixed with soil to prepare the flower nutrient soil, wherein the flower nutrient soil comprises 80% of soil and 20% of metabolic products of the apple snails in percentage by weight.
Example 4
The embodiment 4 of the invention provides a method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by using crop straw particles, which comprises the following steps:
1) preparing mixed feed particles:
① drying wheat straw, corn straw and rice straw, pulverizing into strips with length of 1.8 cm by hammer mill, pulverizing to obtain straw powder, and granulating with granulator to obtain crop straw granules;
the crop straw particles comprise the following components in percentage by weight: 35% of wheat straw particles, 35% of corn straw particles and 30% of rice straw particles.
②, using crop straw particles as padding, adsorbing livestock and poultry manure by the padding, controlling the humidity of the padding to be 45% to obtain premix, stirring and airing the premix, and granulating to obtain mixed feed particles;
in this embodiment, the livestock and poultry manure comprises 48% of cow manure and 52% of cow urine.
2) Feeding apple snails: feeding apple snails by using the mixed feed particles prepared in the step 1), wherein the water temperature is controlled at 22 ℃ in the feeding process, and the pH value of the water is controlled at 7.5; in the apple snail feeding process, a proper amount of nitrobacteria needs to be added; the nitrifying bacteria account for 1.8 percent of the weight of the whole mixed feed particles.
3) Meat shell separation:
① when the apple snails grow to maturity, harvesting the adult apple snails;
② boiling adult apple snail in water, and separating meat from shell to obtain shell and meat;
4) crushing: drying and crushing the snail shells to obtain biological calcium powder; in addition, the snail meat is dried and crushed to obtain snail meat powder; and (3) airing and crushing the metabolic products of the apple snails, and mixing the crushed products with soil to prepare the nutrient soil.
In the nutrient soil, the soil accounts for 78% by weight, and the metabolic products of apple snails account for 22% by weight.
Example 5
The embodiment 5 of the invention provides a method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by using crop straw particles, which comprises the following steps:
1) preparing mixed feed particles:
① drying wheat straw, corn straw and rice straw, pulverizing into strips with length of 1.6 cm by hammer mill, pulverizing to obtain straw powder, and granulating with granulator to obtain crop straw granules;
the crop straw particles comprise the following components in percentage by weight: 35% of wheat straw particles, 30% of corn straw particles and 35% of rice straw particles.
② taking crop straw particles as padding, adsorbing livestock and poultry manure with the padding, controlling the humidity of the padding to be below 50% to obtain premix, stirring and airing the premix, and granulating to obtain mixed feed particles;
in this embodiment, the livestock and poultry manure comprises 50% of rabbit manure and 50% of rabbit urine.
2) Feeding apple snails: feeding apple snails by using the mixed feed particles prepared in the step 1), wherein the water temperature is controlled at 23 ℃ in the feeding process, and the pH value of the water is controlled at 7.3; in the apple snail feeding process, a proper amount of nitrobacteria needs to be added; the nitrifying bacteria account for 1.2 percent of the weight of the whole mixed feed particles.
3) Meat shell separation:
① when the apple snails grow to maturity, harvesting the adult apple snails;
② boiling adult apple snail in water, and separating meat from shell to obtain shell and meat;
4) crushing: drying and crushing the snail shells to obtain biological calcium powder; in addition, the snail meat is dried and crushed to obtain snail meat powder; and (3) airing and crushing the metabolic products of the apple snails, and mixing the crushed products with soil to prepare the nutrient soil.
In the nutrient soil, the soil accounts for 80 percent by weight, and the metabolic products of the apple snails account for 20 percent by weight.
Comparative example 1
The comparative example 1 provides a method for producing biological calcium powder by adsorbing livestock and poultry manure with crop straw particles, which comprises the following steps:
1) preparing mixed feed particles:
① drying wheat straw, corn straw and rice straw, pulverizing into strips with length of 1.6 cm by hammer mill, pulverizing to obtain straw powder, and granulating with granulator to obtain crop straw granules;
the crop straw particles comprise the following components in percentage by weight: 35% of wheat straw particles, 30% of corn straw particles and 35% of rice straw particles.
② taking crop straw particles as padding, adsorbing livestock and poultry manure with the padding, controlling the humidity of the padding to be below 50% to obtain premix, stirring and airing the premix, and granulating to obtain mixed feed particles;
in this embodiment, the livestock and poultry manure comprises 50% of cow manure and 50% of rabbit urine.
2) Feeding apple snails: feeding apple snails by using the mixed feed particles prepared in the step 1), wherein the water temperature is controlled at 23 ℃ in the feeding process, and the pH value of the water is controlled at 7.3; in the apple snail feeding process, a proper amount of nitrobacteria needs to be added; the nitrifying bacteria account for 1.2 percent of the weight of the whole mixed feed particles.
3) Meat shell separation:
① when the apple snails grow to maturity, harvesting the adult apple snails;
② boiling adult apple snail in water, and separating meat from shell to obtain shell and meat;
4) crushing: drying and crushing the snail shells to obtain biological calcium powder; in addition, the snail meat is dried and crushed to obtain snail meat powder; and (3) airing and crushing the metabolic products of the apple snails, and mixing the crushed products with soil to prepare the nutrient soil.
In the nutrient soil, the soil accounts for 80 percent by weight, and the metabolic products of the apple snails account for 20 percent by weight.
Comparative example 2
The comparative example 1 provides a method for producing biological calcium powder by adsorbing livestock and poultry manure with crop straw particles, which comprises the following steps:
1) preparing mixed feed particles:
① drying wheat straw, corn straw and rice straw, pulverizing into strips with length of 1.6 cm by hammer mill, pulverizing to obtain straw powder, and granulating with granulator to obtain crop straw granules;
the crop straw particles comprise the following components in percentage by weight: 35% of wheat straw particles, 30% of corn straw particles and 35% of rice straw particles.
② taking crop straw particles as padding, adsorbing livestock and poultry manure with the padding, controlling the humidity of the padding to be below 50% to obtain premix, stirring and airing the premix, and granulating to obtain mixed feed particles;
in this embodiment, the livestock and poultry manure comprises 50% of rabbit manure and 50% of cow urine.
2) Feeding apple snails: feeding apple snails by using the mixed feed particles prepared in the step 1), wherein the water temperature is controlled at 23 ℃ in the feeding process, and the pH value of the water is controlled at 7.3; in the apple snail feeding process, a proper amount of nitrobacteria needs to be added; the nitrifying bacteria account for 1.2 percent of the weight of the whole mixed feed particles.
3) Meat shell separation:
① when the apple snails grow to maturity, harvesting the adult apple snails;
② boiling adult apple snail in water, and separating meat from shell to obtain shell and meat;
4) crushing: drying and crushing the snail shells to obtain biological calcium powder; in addition, the snail meat is dried and crushed to obtain snail meat powder; and (3) airing and crushing the metabolic products of the apple snails, and mixing the crushed products with soil to prepare the nutrient soil.
In the nutrient soil, the soil accounts for 80 percent by weight, and the metabolic products of the apple snails account for 20 percent by weight.
In comparative example 1, cow dung and rabbit urine are adopted as livestock and poultry dung and urine;
in comparative example 2, rabbit manure and cow urine were used as livestock manure;
other conditions, comparative examples 1-2 were the same as example 5.
Through detection, the experimental result is as follows:
| calcium content of biological calcium powder | Protein content of snail meat powder | |
| Example 1 | 30% | 11% |
| Example 2 | 33% | 13% |
| Example 3 | 32% | 12% |
| Example 4 | 32.5% | 12.5% |
| Example 5 | 33% | 12.8% |
| Comparative example 1 | 23.5% | 9.5% |
| Comparative example 2 | 23.8% | 9.2% |
From the above experimental results, it can be seen that the feces and urine of the same livestock and poultry are adopted, so that the pathogenic bacteria in the feces and urine of the livestock and poultry can be completely killed, and the mixed feed particles can be purified, so that the appetite of the apple snails can be improved, and the protein content of the snail meat can be increased. According to experimental data, the calcium content and the protein content of the snail meat powder of the final biological calcium powder are higher when the apple snails are fed by the feed prepared from the excrement and the urine of the same livestock and poultry than when the apple snails are fed by the feed prepared from the excrement and the urine of the animals.
It should be noted that, throughout the specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. It should be noted that there are no more than infinite trial-and-error modes objectively due to the limited character expressions, and it will be apparent to those skilled in the art that various modifications, decorations, or changes may be made without departing from the spirit of the invention or the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (9)
1. A method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by utilizing crop straw particles is characterized by comprising the following steps:
1) preparing mixed feed particles:
① drying the crop straw, pulverizing, and granulating to obtain crop straw granule;
②, using the crop straw particles as padding to adsorb livestock and poultry manure, controlling the humidity of the padding to be below 50% to obtain premix, stirring and airing the premix, and granulating to obtain mixed feed particles;
2) feeding apple snails: feeding apple snails by adopting the mixed feed particles prepared in the step 1);
3) meat shell separation:
① when the apple snails grow to maturity, harvesting adult apple snails;
② cooking the obtained adult apple snail in water, and separating meat from shell to obtain snail shell and snail meat;
4) crushing: and drying and crushing the spiral shell to obtain the biological calcium powder.
2. The method as claimed in claim 1, wherein the feeding process controls the temperature of water at 20-25 ℃ and the pH value of water at 7.2-7.8 in step 2).
3. The method of claim 1, further comprising the steps of: adding nitrobacteria in the process of feeding the apple snails.
4. The method of claim 1, wherein the crop straw comprises: wheat straw, corn straw, rice straw.
5. The method of claim 1, wherein the livestock manure comprises manure and urine of the same livestock.
6. The method according to any of claims 1-5, further comprising the steps of: and drying and crushing the snail meat to obtain snail meat powder.
7. The method of claim 6, further comprising the steps of: and (3) airing and crushing the metabolic products of the apple snails, and mixing the crushed products with soil to prepare the nutrient soil.
8. The method of any one of claims 7, wherein the nutrient soil comprises 75-85% by weight of said soil and 15-25% by weight of said metabolic products of apple snails.
9. The method of claim 4, wherein the crop straw pellets comprise, in weight percent: 30-40% of wheat straw particles, 30-40% of corn straw particles and 30-40% of rice straw particles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911210288.4A CN110720554A (en) | 2019-12-02 | 2019-12-02 | Method for producing biological calcium powder by adsorbing livestock and poultry excrement and urine by using crop straw particles |
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