CN117776790A - Ecological pig manure fermentation manufacturing method - Google Patents
Ecological pig manure fermentation manufacturing method Download PDFInfo
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- CN117776790A CN117776790A CN202311510643.6A CN202311510643A CN117776790A CN 117776790 A CN117776790 A CN 117776790A CN 202311510643 A CN202311510643 A CN 202311510643A CN 117776790 A CN117776790 A CN 117776790A
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- pig manure
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- 210000003608 fece Anatomy 0.000 title claims abstract description 107
- 239000010871 livestock manure Substances 0.000 title claims abstract description 107
- 238000000855 fermentation Methods 0.000 title claims abstract description 63
- 230000004151 fermentation Effects 0.000 title claims abstract description 63
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000002361 compost Substances 0.000 claims abstract description 63
- 241000894006 Bacteria Species 0.000 claims abstract description 18
- 239000007858 starting material Substances 0.000 claims abstract description 16
- 238000009264 composting Methods 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 12
- 229910052799 carbon Inorganic materials 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 244000005700 microbiome Species 0.000 claims description 12
- 239000010902 straw Substances 0.000 claims description 11
- 238000001914 filtration Methods 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 239000003895 organic fertilizer Substances 0.000 claims description 10
- 239000011368 organic material Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 230000009286 beneficial effect Effects 0.000 claims description 8
- 239000010806 kitchen waste Substances 0.000 claims description 8
- 238000000926 separation method Methods 0.000 claims description 7
- 238000011282 treatment Methods 0.000 claims description 6
- 239000002023 wood Substances 0.000 claims description 6
- 235000019733 Fish meal Nutrition 0.000 claims description 5
- 241001465754 Metazoa Species 0.000 claims description 5
- 239000010828 animal waste Substances 0.000 claims description 5
- 239000002374 bone meal Substances 0.000 claims description 5
- 229940036811 bone meal Drugs 0.000 claims description 5
- 239000004467 fishmeal Substances 0.000 claims description 5
- 239000003999 initiator Substances 0.000 claims description 5
- 238000007885 magnetic separation Methods 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 238000002156 mixing Methods 0.000 claims description 5
- 238000009423 ventilation Methods 0.000 claims description 5
- 241000186361 Actinobacteria <class> Species 0.000 claims description 3
- 244000063299 Bacillus subtilis Species 0.000 claims description 3
- 235000014469 Bacillus subtilis Nutrition 0.000 claims description 3
- 241000233866 Fungi Species 0.000 claims description 3
- 241000186660 Lactobacillus Species 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 3
- 239000004463 hay Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 238000011221 initial treatment Methods 0.000 claims description 3
- 229940039696 lactobacillus Drugs 0.000 claims description 3
- 150000002739 metals Chemical class 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 239000010893 paper waste Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000009966 trimming Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 abstract description 13
- 230000000694 effects Effects 0.000 abstract description 8
- 239000003337 fertilizer Substances 0.000 abstract description 8
- 230000008636 plant growth process Effects 0.000 abstract description 4
- 239000004615 ingredient Substances 0.000 abstract description 3
- 235000016709 nutrition Nutrition 0.000 abstract description 3
- 230000001954 sterilising effect Effects 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 description 6
- 230000012010 growth Effects 0.000 description 4
- 230000000813 microbial effect Effects 0.000 description 4
- 239000010815 organic waste Substances 0.000 description 4
- 235000015097 nutrients Nutrition 0.000 description 3
- 241000287828 Gallus gallus Species 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 235000014633 carbohydrates Nutrition 0.000 description 2
- 150000001720 carbohydrates Chemical class 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000000796 flavoring agent Substances 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 235000021190 leftovers Nutrition 0.000 description 2
- 239000006148 magnetic separator Substances 0.000 description 2
- 239000010813 municipal solid waste Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229910052700 potassium Inorganic materials 0.000 description 2
- 239000011591 potassium Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 238000009360 aquaculture Methods 0.000 description 1
- 244000144974 aquaculture Species 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 230000008635 plant growth Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229930000044 secondary metabolite Natural products 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
The invention relates to the technical field of pig manure fermentation, and discloses a manufacturing method for ecological pig manure fermentation, which comprises the following specific steps: collecting pig manure, adjusting humidity, adding a compost starter, building a compost pile, turning the pile periodically, controlling temperature and finishing fermentation, collecting the pig manure, separating and treating, improving fermentation effect, reducing existence of harmful bacteria, adjusting humidity and temperature of the pig manure, killing the harmful bacteria, treating and sterilizing the ecological pig manure, simultaneously helping decomposing organic substances into stable organic fertilizers, completely fermenting the ecological pig manure, fermenting the ecological pig manure into pollution-free ecological organic fertilizers, and meeting various nutritional ingredients required in a plant growth process.
Description
Technical Field
The invention relates to the technical field of pig manure fermentation, in particular to a manufacturing method for ecological pig manure fermentation.
Background
Fermentation refers to a process in which microorganisms are used to produce microbial cells themselves, or direct or secondary metabolites, by means of their vital activities under aerobic or anaerobic conditions, and is sometimes also written as fermentation, which is defined as a fermentation, which is often referred to as fermentation, and which refers to a process in which organisms decompose organic substances.
Ecological pig manure fermentation is a process for converting pig manure into organic fertilizer by using biotechnology, and is helpful for reducing pollution of pig manure to the environment and converting the pig manure into organic fertilizer beneficial to plant growth.
In general, after the pig manure is placed and dried for a period of time, the pig manure is crushed and packed and then put into ecological cultivation for fertilization, and the method does not undergo fermentation treatment or incomplete fermentation and can not completely kill harmful bacteria in the pig manure, so that the survival of plants can be influenced, the pig manure is single in strength, and most of nutrient substances required in the plant growth process can not be supplied.
Therefore, a method for producing ecological pig manure by fermentation is provided.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a method for preparing ecological pig manure by fermentation, which can treat and sterilize the ecological pig manure, can completely ferment the ecological pig manure, and can ferment the ecological pig manure into pollution-free ecological organic fertilizer.
(II) technical scheme
The invention is realized by adopting the following technical scheme: the method for preparing the ecological pig manure by fermentation comprises the following specific steps:
s1, collecting pig manure: collecting pig manure into a container and performing primary treatment;
s2, humidity adjustment: the collected pig manure is subjected to humidity adjustment;
s3, adding a compost starter: adding a compost initiator into the collected pig manure;
s4, building a compost pile: uniformly mixing pig manure and a composting starter to form a composting pile;
s5, turning over the pile regularly: turning the compost pile regularly to accelerate the fermentation process;
s6, controlling the temperature: controlling the temperature of the compost pile;
s7, fermentation is completed: after the fermentation of the pig manure in the compost heap is completed, the material is removed by filtration.
In step S1, pig manure is collected into a container and subjected to preliminary treatment, and the pig manure is ensured to be free of other impurities, such as plastic bags or metals, and then separated from the bed material or other organic materials.
In the step S2, the collected pig manure is subjected to humidity adjustment, the humidity is generally kept between 50% and 60%, and if the pig manure is too dry, a proper amount of water can be added to increase the humidity; if the pig manure is too wet, some dry organic material, such as straw or wood chips, may be added to absorb excess moisture.
In step S3, in order to accelerate the fermentation process, some compost starter may be added, which may be provided as powder or granules.
A compost initiator is a substance added to a compost heap to promote rapid decomposition of organic waste and initiation of a composting process, which accelerates the composting process, improves composting efficiency, and reduces the production of off-flavors and harmful gases, which microorganisms decompose organic waste into fertilizer, and which can provide suitable environmental conditions, such as suitable temperature, humidity and ventilation, to promote the growth and activity of microorganisms.
In step S3, the composting starter comprises beneficial microorganisms, bacteria and fungi, and specifically comprises composting bacteria, a carbon source, a nitrogen source and water;
wherein the composting bacteria are one or more of bacillus subtilis, lactobacillus and actinomycetes;
the carbon comprises hay, wood dust, straw and waste paper;
the nitrogen source comprises fresh lawn trimmings, kitchen waste and animal manure.
Composting bacteria are beneficial microorganisms and can decompose organic matters and convert the organic matters into fertilizer; the composting process requires carbon to provide energy and structural support; nitrogen is a key element for microbial growth and organic decomposition; proper amount of water is critical to the composting process, and can maintain the humidity of the compost and promote the activity of microorganisms and the decomposition of organic matters.
In step S4, uniformly mixing pig manure and a composting starter to form a composting pile, wherein the size of the composting pile is determined according to the available pig manure amount, and the height of the composting pile is ensured to be moderate so that air can circulate.
In step S5, the compost heap is turned over periodically to help promote oxygen to enter the compost heap, accelerate the fermentation process, and turn over once every 15-20 days to ensure uniform fermentation.
In the step S6, the temperature of the compost pile is controlled to be between 60 and 70 ℃ and maintained for 3 to 4 weeks, then the temperature of the compost pile is controlled to be between 50 and 60 ℃ and is overhigh, and the temperature can be reduced by proper pile turning and ventilation; if the temperature is too low, some organic materials which are easy to decompose, including straw or hay, kitchen waste, animal waste and fish meal or bone meal, can be added to raise the temperature.
Straw or hay: these materials are rich in carbohydrates and can be fermented to generate heat, which can be added to the fermented mass to raise the overall temperature.
Kitchen waste: the kitchen garbage such as vegetable peel, leftovers and the like contains rich organic substances, can provide carbon sources and energy required by fermentation, and can promote the fermentation process and increase the temperature by adding the carbon sources and the energy into a fermentation pile.
Animal waste: animal manure such as chicken manure, cow manure and the like contains rich organic substances, can be used as an additive of a fermentation pile, can be decomposed to generate heat, and can raise the fermentation temperature.
Fish meal or bone meal: these organic fertilizers contain rich nutrients such as nitrogen, phosphorus and potassium, and can promote the fermentation process and raise the temperature.
In step S7, the fermentation time of the pig manure in the compost pile is 3-4 months, and when the pig manure turns into black brown, loose and fluffy matters, the pig manure is considered to be fermented, the fermented pig manure can be used as an organic fertilizer, and the compost is filtered through screen filtering, wind separation and magnetic separation to remove the matters.
Filtering with a screen: filtering the compost through a screen using a screen having smaller pore sizes; this will prevent the passage of larger material and thus separate finer compost.
Wind power separation: the light matters (such as paper, leaves and the like) in the compost are blown away by wind power, so that heavier matters are separated.
Magnetic separation: if the compost contains magnetic substances (such as metal fragments), the compost can be adsorbed and separated by using a magnetic separator.
Preferably, in step S5, the prepared microbial preparation may be applied by being added to feed or sprayed in a body of aquaculture water.
(III) beneficial effects
Compared with the prior art, the invention provides a method for preparing ecological pig manure by fermentation, which has the following beneficial effects:
the method for preparing the ecological pig manure by fermentation collects the pig manure and carries out separation treatment, improves the fermentation effect, reduces the existence of harmful bacteria, adjusts the humidity and the temperature of the pig manure, kills the harmful bacteria, can treat and sterilize the ecological pig manure, simultaneously is favorable for decomposing organic substances into stable organic fertilizer, enables the ecological pig manure to carry out complete fermentation, ferments the ecological pig manure into pollution-free ecological organic fertilizer, and can meet various nutritional ingredients required in the plant growth process.
Drawings
Fig. 1 is an overall construction diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and detailed description, wherein it is to be understood that, on the premise of no conflict, the following embodiments or technical features may be arbitrarily combined to form new embodiments.
Example 1:
referring to fig. 1, the method for producing ecological pig manure by fermentation in this embodiment comprises the following steps:
s1, collecting pig manure: collecting pig manure into a container and performing primary treatment;
in step S1, pig manure is collected into a container and subjected to preliminary treatment, and the pig manure is ensured to be free of other impurities, such as plastic bags or metals, and then separated from the bed material or other organic materials.
S2, humidity adjustment: the collected pig manure is subjected to humidity adjustment;
in the step S2, the collected pig manure is subjected to humidity adjustment, the humidity is generally kept between 50% and 60%, and if the pig manure is too dry, a proper amount of water can be added to increase the humidity; if the pig manure is too wet, some dry organic material, such as straw or wood chips, may be added to absorb excess moisture.
S3, adding a compost starter: adding a compost initiator into the collected pig manure;
in step S3, in order to accelerate the fermentation process, some compost starter may be added, which may be provided as powder or granules.
A compost initiator is a substance added to a compost heap to promote rapid decomposition of organic waste and initiation of a composting process, which accelerates the composting process, improves composting efficiency, and reduces the production of off-flavors and harmful gases, which microorganisms decompose organic waste into fertilizer, and which can provide suitable environmental conditions, such as suitable temperature, humidity and ventilation, to promote the growth and activity of microorganisms.
In step S3, the composting starter comprises beneficial microorganisms, bacteria and fungi, and specifically comprises composting bacteria, a carbon source, a nitrogen source and water;
wherein the composting bacteria are one or more of bacillus subtilis, lactobacillus and actinomycetes;
the carbon comprises hay, wood dust, straw and waste paper;
the nitrogen source comprises fresh lawn trimmings, kitchen waste and animal manure.
Composting bacteria are beneficial microorganisms and can decompose organic matters and convert the organic matters into fertilizer; the composting process requires carbon to provide energy and structural support; nitrogen is a key element for microbial growth and organic decomposition; proper amount of water is critical to the composting process, and can maintain the humidity of the compost and promote the activity of microorganisms and the decomposition of organic matters.
S4, building a compost pile: uniformly mixing pig manure and a composting starter to form a composting pile;
in step S4, uniformly mixing pig manure and a composting starter to form a composting pile, wherein the size of the composting pile is determined according to the available pig manure amount, and the height of the composting pile is ensured to be moderate so that air can circulate.
S5, turning over the pile regularly: turning the compost pile regularly to accelerate the fermentation process;
in step S5, the compost heap is turned over periodically to help promote oxygen to enter the compost heap, accelerate the fermentation process, and turn over once every 15-20 days to ensure uniform fermentation.
S6, controlling the temperature: controlling the temperature of the compost pile;
in the step S6, the temperature of the compost pile is controlled to be between 60 and 70 ℃ and maintained for 3 to 4 weeks, then the temperature of the compost pile is controlled to be between 50 and 60 ℃ and is overhigh, and the temperature can be reduced by proper pile turning and ventilation; if the temperature is too low, some organic materials which are easy to decompose, including straw or hay, kitchen waste, animal waste and fish meal or bone meal, can be added to raise the temperature.
Straw or hay: these materials are rich in carbohydrates and can be fermented to generate heat, which can be added to the fermented mass to raise the overall temperature.
Kitchen waste: the kitchen garbage such as vegetable peel, leftovers and the like contains rich organic substances, can provide carbon sources and energy required by fermentation, and can promote the fermentation process and increase the temperature by adding the carbon sources and the energy into a fermentation pile.
Animal waste: animal manure such as chicken manure, cow manure and the like contains rich organic substances, can be used as an additive of a fermentation pile, can be decomposed to generate heat, and can raise the fermentation temperature.
Fish meal or bone meal: these organic fertilizers contain rich nutrients such as nitrogen, phosphorus and potassium, and can promote the fermentation process and raise the temperature.
S7, fermentation is completed: after the fermentation of the pig manure in the compost heap is completed, the material is removed by filtration.
In step S7, the fermentation time of the pig manure in the compost pile is 3-4 months, and when the pig manure turns into black brown, loose and fluffy matters, the pig manure is considered to be fermented, the fermented pig manure can be used as an organic fertilizer, and the compost is filtered through screen filtering, wind separation and magnetic separation to remove the matters.
Filtering with a screen: filtering the compost through a screen using a screen having smaller pore sizes; this will prevent the passage of larger material and thus separate finer compost.
Wind power separation: the light matters (such as paper, leaves and the like) in the compost are blown away by wind power, so that heavier matters are separated.
Magnetic separation: if the compost contains magnetic substances (such as metal fragments), the compost can be adsorbed and separated by using a magnetic separator.
The method for preparing the ecological pig manure by fermentation collects the pig manure and carries out separation treatment, improves the fermentation effect, reduces the existence of harmful bacteria, adjusts the humidity and the temperature of the pig manure, kills the harmful bacteria, can treat and sterilize the ecological pig manure, simultaneously is favorable for decomposing organic substances into stable organic fertilizer, enables the ecological pig manure to carry out complete fermentation, ferments the ecological pig manure into pollution-free ecological organic fertilizer, and can meet various nutritional ingredients required in the plant growth process.
The above embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present invention are intended to be within the scope of the present invention as claimed.
Claims (9)
1. The method for preparing the ecological pig manure by fermentation is characterized by comprising the following specific steps of:
s1, collecting pig manure: collecting pig manure into a container and performing primary treatment;
s2, humidity adjustment: the collected pig manure is subjected to humidity adjustment;
s3, adding a compost starter: adding a compost initiator into the collected pig manure;
s4, building a compost pile: uniformly mixing pig manure and a composting starter to form a composting pile;
s5, turning over the pile regularly: turning the compost pile regularly to accelerate the fermentation process;
s6, controlling the temperature: controlling the temperature of the compost pile;
s7, fermentation is completed: after the fermentation of the pig manure in the compost heap is completed, the material is removed by filtration.
2. The method for producing ecological pig manure according to claim 1, wherein in step S1, the pig manure is collected in a container and subjected to preliminary treatment, and the pig manure is ensured to be free of other impurities such as plastic bags or metals, and then separated from the bed material or other organic materials.
3. The method for producing ecological pig manure according to claim 2, wherein in step S2, the collected pig manure is subjected to humidity adjustment, the humidity is generally kept between 50% and 60%, and if the pig manure is too dry, a proper amount of water can be added to increase the humidity; if the pig manure is too wet, some dry organic material, such as straw or wood chips, may be added to absorb excess moisture.
4. A method for the fermentation of ecological pig manure according to claim 3, wherein in step S3, a quantity of compost starter may be added, which may be provided as powder or granules, in order to accelerate the fermentation process.
5. The method for producing ecological pig manure according to claim 4, wherein in step S3, the compost starter contains beneficial microorganisms, bacteria and fungi, specifically comprising composting bacteria, carbon source, nitrogen source and water;
wherein the composting bacteria are one or more of bacillus subtilis, lactobacillus and actinomycetes;
the carbon comprises hay, wood dust, straw and waste paper;
the nitrogen source comprises fresh lawn trimmings, kitchen waste and animal manure.
6. The method of claim 5, wherein in step S4, the pig manure and the compost starter are mixed uniformly to form a compost pile, and the size of the compost pile is determined according to the amount of the pig manure, so that the compost pile is ensured to be moderate in height, and air can circulate.
7. The method of claim 6, wherein in step S5, the compost heap is turned periodically to promote oxygen to enter the compost heap, accelerate the fermentation process, and turn the compost heap every 15-20 days to ensure uniform fermentation.
8. The method for producing ecological pig manure by fermentation according to claim 7, wherein in step S6, the temperature of the compost pile is controlled to be between 60 ℃ and 70 ℃ and maintained for 3-4 weeks, then the temperature of the compost pile is controlled to be between 50 ℃ and 60 ℃ and is too high, and the temperature can be reduced by proper pile turning and ventilation; if the temperature is too low, some organic materials which are easy to decompose, including straw or hay, kitchen waste, animal waste and fish meal or bone meal, can be added to raise the temperature.
9. The method for producing ecological pig manure according to claim 8, wherein in step S7, the fermentation time of pig manure in the compost pile is 3-4 months, and when pig manure turns into black brown, loose and fluffy materials, the fermentation of pig manure is considered to be completed, and the fermented pig manure can be used as an organic fertilizer, and the compost is filtered by screen filtering, wind separation and magnetic separation to remove the materials.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311510643.6A CN117776790A (en) | 2023-11-14 | 2023-11-14 | Ecological pig manure fermentation manufacturing method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311510643.6A CN117776790A (en) | 2023-11-14 | 2023-11-14 | Ecological pig manure fermentation manufacturing method |
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| CN117776790A true CN117776790A (en) | 2024-03-29 |
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| CN202311510643.6A Pending CN117776790A (en) | 2023-11-14 | 2023-11-14 | Ecological pig manure fermentation manufacturing method |
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- 2023-11-14 CN CN202311510643.6A patent/CN117776790A/en active Pending
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