Livestock and poultry manure biological liquid efficient compound fertilizer and preparation method thereof

Abstract

The invention discloses a livestock and poultry manure biological liquid efficient compound fertilizer and a preparation method thereof, and belongs to biomass fertilizers. The method specifically comprises the following steps: S1, raw material pretreatment: carrying out solid-liquid separation on fresh livestock and poultry manure in a screening or extruding manner, taking a liquid part as manure slurry, and adjusting the pH value and the carbon-nitrogen ratio of the manure slurry; s2, multi-stage biological fermentation: performing aerobic or facultative fermentation through anaerobic fermentation and a complex microbial inoculant, and completing manure degradation, purification and nutrient release through the synergistic effect of microorganisms and enzymes. The problems of water eutrophication and ammonia / hydrogen sulfide air pollution caused by traditional livestock and poultry manure treatment are thoroughly solved, nearly zero emission of manure is achieved through solid-liquid separation and multi-stage fermentation, carbon neutralization and circular economy policy guidance are combined, and the environmental protection treatment pressure of a livestock farm is reduced.

Description

Technical Field

[0001] This invention relates to biomass fertilizer, and more particularly to a high-efficiency compound fertilizer for livestock and poultry manure biological liquid and its preparation method. Background Technology

[0002] Large-scale livestock and poultry farming generates a large amount of manure, and traditional treatment methods (such as simple composting, direct application to the field, and discharge) have many problems: Environmental pollution: Nutrient loss leads to eutrophication of water bodies, and the emission of harmful gases (ammonia, hydrogen sulfide) pollutes the air; Resource waste: Manure contains abundant nitrogen, phosphorus, potassium, and organic matter, which are valuable resources, but without effective treatment, they are difficult for crops to absorb efficiently; Wastewater treatment after solid-liquid separation is difficult and costly; Traditional organic fertilizers are bulky, inconvenient to transport, and have slow fertilizer effects. Simply fermented liquid fertilizers have limited nutrient content and may contain harmful pathogens and antibiotic residues. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to provide a high-efficiency compound biological liquid fertilizer for livestock and poultry manure and its preparation method; it can solve the problems of simple fermentation liquid fertilizer having single nutrients and possibly containing harmful pathogens and antibiotic residues.

[0004] Technical Solution: To solve the above-mentioned technical problems, according to one aspect of the present invention, more specifically, a method for preparing a high-efficiency compound fertilizer for livestock and poultry manure biological liquid, specifically including the following steps: S1. Raw material pretreatment: Fresh livestock and poultry manure is separated into solid and liquid components by screening or extrusion, and the liquid portion is taken as manure slurry. The pH value and carbon-nitrogen ratio of the manure slurry are adjusted. S2. Multi-stage biological fermentation: Through anaerobic fermentation, compound microbial agents carry out aerobic or facultative fermentation. Through the synergistic action of microorganisms and enzymes, the degradation, purification and nutrient release of fecal waste are completed. S3. Compounding and Modulation: Based on the nutritional needs of the target crop, chemical fertilizers are added to the fermented liquid, and the NPK ratio is precisely adjusted to form an "organic + inorganic" compound system. Humic acid, seaweed extract, trace element chelating agent and surfactant are added. Through process control, it is ensured that the liquid fertilizer does not separate, precipitate or crystallize during storage. S4. Post-processing and packaging: The liquid fertilizer is filtered, tested, and packaged in sequence to remove residues that may clog the drip irrigation pipes. The finished product is tested for fertilizer efficiency and hygiene indicators. The qualified liquid fertilizer is then filled into barrels or tanks.

[0005] Furthermore, in step S1, the livestock and poultry manure is one or more of pig manure, chicken manure, and cow manure.

[0006] Furthermore, step S2 specifically includes the following steps: S21. Rapid anaerobic fermentation: Add a compound bacterial agent containing highly efficient hydrolytic bacteria and methanogenic bacteria to the manure slurry, and carry out mesophilic or high-temperature fermentation in a closed environment, while controlling the carbon-nitrogen ratio to be 20:1~30:1. The hydrolysis acidification stage and the methanogenic stage are carried out in different reactors respectively. S22, Aerobic hydrolysis: Add a compound enzyme preparation to the product after anaerobic fermentation and carry out aerobic hydrolysis treatment.

[0007] Furthermore, the compound microbial agent includes fermenting bacteria, phosphorus- and potassium-solubilizing bacteria, and pathogenic bacteria-inhibiting bacteria; Fermentation bacteria include yeast, lactic acid bacteria, and Bacillus; The pathogenic bacteria are inhibited by actinomycetes; The compound enzyme preparation contains cellulase, hemicellulase, protease, lipase, urease, uricase, and chitinase.

[0008] Furthermore, the enzymes in the compound enzyme preparation are selected and compounded according to the components of livestock and poultry manure.

[0009] Furthermore, the chemical fertilizers in step S3 include urea, potassium dihydrogen phosphate, and potassium sulfate.

[0010] Furthermore, in step S4, the fertilizer efficiency indicators include NPK content and organic matter content; the hygiene indicators include the number of pathogens and antibiotic residues.

[0011] According to another aspect of the present invention, and more specifically, a high-efficiency compound fertilizer for livestock and poultry manure biological liquid, characterized in that: the compound fertilizer is prepared based on the above-described method for preparing a high-efficiency compound fertilizer for livestock and poultry manure biological liquid, and contains macro-elements of nitrogen, phosphorus, and potassium, organic matter, amino acids, trace elements, and beneficial microorganisms. Beneficial Effects: Addressing Environmental Pain Points and Achieving Green Circulation: Completely transforming the eutrophication of water bodies and ammonia / hydrogen sulfide air pollution problems caused by traditional livestock manure treatment, achieving near-zero emissions of manure through solid-liquid separation and multi-stage fermentation, aligning with "carbon neutrality" and circular economy policies, and reducing the environmental treatment pressure on farms. Activating Waste Resources and Improving Utilization Efficiency: Valuable resources in manure that are difficult for crops to absorb, such as nitrogen, phosphorus, potassium, and organic matter, are transformed into easily absorbed nutrients through the synergistic action of microorganisms and enzymes, avoiding resource waste and achieving resource utilization that "turns waste into treasure." Outstanding Product Advantages and Adaptability to Diverse Needs: The finished product is in liquid form and can be applied mechanically through drip irrigation, sprinkler irrigation, and fertigation, saving labor costs; it adopts an "organic + inorganic" composite system, containing macro-elements, organic matter, amino acids, trace elements, and beneficial microorganisms, providing comprehensive nutrients and rapid fertilizer effects; after fermentation and testing, it effectively removes pathogens, reduces antibiotic residues, is safe to use, and can also improve soil and reduce soil-borne diseases. To achieve multiple benefits and promote industrial development: to open up additional revenue channels for livestock farms and reduce the high cost of wastewater treatment; to provide growers with cost-effective high-end compound fertilizers to help improve crop yield and quality; and to promote the sustainable development of agriculture that integrates planting and breeding, thereby achieving a balance of environmental, economic and social benefits. Attached Figure Description

[0012] Figure 1 This is a flowchart illustrating the method. Detailed Implementation

[0013] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] Example:

[0015] Preparation and application of high-efficiency compound fertilizer made from livestock and poultry manure biological liquid I. Purpose of Implementation To meet the nutritional needs of greenhouse strawberries, which require "moderate nitrogen, sufficient phosphorus and potassium, and rich trace elements," a liquid compound fertilizer with fast-acting properties, easy absorption, and soil-improving effects was developed, while also solving the problem of manure treatment in large-scale pig farms.

[0016] II. Raw Material and Equipment Preparation Core ingredients: fresh pig manure (70%) + fresh chicken manure (30%) mixed manure, crushed straw (for carbon source adjustment), compound microbial agent (containing high-efficiency hydrolyzing bacteria, methanogens, yeast, lactic acid bacteria, Bacillus, actinomycetes, phosphorus and potassium solubilizing bacteria), compound enzyme preparation (cellulase, hemicellulase, protease, lipase, urease, uricase, chitinase), urea, potassium dihydrogen phosphate, potassium sulfate (chemical fertilizer), humic acid, seaweed extract, trace element chelating agent (chelated iron, zinc, boron), and nonionic surfactant.

[0017] Equipment: Extrusion solid-liquid separator, pH meter, carbon-nitrogen ratio meter, sealed fermentation tanks (2 units, one for hydrolysis acidification and the other for methanogenesis), aerobic hydrolysis reactor (with aeration device), stirring equipment, 100-mesh filter, fertilizer efficiency testing instruments (nitrogen, phosphorus and potassium content analyzer, organic matter analyzer), hygiene testing equipment (pathogen counter, antibiotic residue analyzer), 20L sealed plastic drum.

[0018] III. Preparation Steps S1: Raw material pretreatment Take 700 kg of fresh pig manure and 300 kg of fresh chicken manure, mix them together and put them into a squeeze-type solid-liquid separator for solid-liquid separation. Collect about 800 kg of liquid part (manure slurry) and use the solid part separately to make solid organic fertilizer.

[0019] The initial pH value of the manure slurry was 6.2 and the carbon-nitrogen ratio (C / N) was 15:1. 80 kg of crushed straw was added to the slurry, stirred evenly, and tested again. The pH value was adjusted to 7.0 and the C / N ratio (C / N) was adjusted to 25:1 (which meets the optimal range of anaerobic fermentation 20:1~30:1). The mixture was then left to stand for 12 hours for later use.

[0020] S2: Multi-stage bio-fermentation S21: Rapid Anaerobic Fermentation The adjusted manure slurry was pumped into the first closed fermentation tank (hydrolysis acidification reactor), and 4 kg of compound microbial agent was added (microbial agent ratio: 30% high-efficiency hydrolytic bacteria, 30% methanogenic bacteria, 10% yeast, 10% lactic acid bacteria, 10% Bacillus, 5% actinomycetes, and 5% phosphorus and potassium solubilizing bacteria), and stirred evenly.

[0021] The fermentation temperature was controlled at 37℃ (mesothermal fermentation), and the tank was kept in a sealed, anaerobic environment for hydrolysis and acidification reaction for 3 days. During this period, the pH value was monitored daily (maintained at 6.5~7.2).

[0022] The hydrolyzed and acidified material is transferred to a second closed fermentation tank (methanogenic reactor), which continues to maintain a medium temperature of 37°C in a closed environment for methanogenic reaction for 7 days. During this period, the biogas produced is periodically released (which can be recycled). The final fermentation material is an odorless, dark brown digestive liquid.

[0023] S22: Aerobic hydrolysis The digestate after anaerobic fermentation was transferred to an aerobic hydrolysis reactor, and 2.4 kg of compound enzyme preparation (enzyme ratio: cellulase 22%, hemicellulase 18%, protease 20%, lipase 10%, urease 12%, uricase 8%, chitinase 10%) was added and stirred evenly.

[0024] Turn on the aeration device and control the aeration rate at 0.6 m³ / (m³・h). Maintain the fermentation temperature at 30°C and carry out the aerobic hydrolysis reaction for 48 hours. Stir once every 12 hours during this period to ensure that the enzyme and the material are in full contact.

[0025] S3: Compounding and Modulation Nutrient supplementation: Take 800 kg of fermentation broth after aerobic hydrolysis and test the initial NPK ratio to be 0.8:0.5:0.6. According to the nutritional requirements of strawberries, add 12 kg of urea, 16 kg of potassium dihydrogen phosphate, and 20 kg of potassium sulfate, stir until completely dissolved, and adjust the final NPK ratio to 1:1.5:2.

[0026] Addition of functional ingredients: Add 4 kg of humic acid (0.5% of the total liquid weight), 2.4 kg of seaweed extract (0.3%), 1.6 kg of trace element chelating agent (0.2%), and 0.8 kg of nonionic surfactant (0.1%) to the mixture and stir continuously for 30 minutes.

[0027] Stabilization treatment: The mixture is allowed to stand for 24 hours. During this period, no stratification or precipitation is observed. Storage stability is ensured through process control.

[0028] S4: Post-processing and Packaging The stabilized liquid is filtered using a 100-mesh filter to remove residual residue and prevent clogging of the drip irrigation pipes for strawberry cultivation.

[0029] Testing: The filtered finished product was tested for the following indicators: total NPK content ≥18%, organic matter content ≥12%, Escherichia coli count <50 CFU / mL, antibiotic residue <0.05 mg / kg, which meets the requirements for fertilizer efficiency and hygiene.

[0030] The qualified finished product is filled into 20L sealed plastic buckets, labeled with "Strawberry-specific biological liquid compound fertilizer", NPK ratio, production date and shelf life, and the preparation is completed.

[0031] IV. Application Effect Verification Application method: Start applying 10 days after strawberry transplanting, using drip irrigation, applying 50L per acre each time, once every 15 days, for a total of 4 applications.

[0032] Results: Strawberry leaves are dark green and grow vigorously, with a 15% increase in flowering and fruit setting rate; fruits have uniform color and increased sweetness, with an average increase in single fruit weight of 10%; soil organic matter content increases by 8% compared to before application, the number of pathogens decreases, and the incidence of soil-borne diseases decreases by 20%; there is no odor pollution throughout the process, meeting the environmental protection requirements for facility cultivation.

[0033] V. Implementation Conclusions This embodiment strictly follows the preparation method described in the patent and successfully prepares a high-efficiency compound fertilizer for livestock and poultry manure biological liquid suitable for strawberry cultivation. It not only solves the environmental protection problem of livestock and poultry manure treatment, but also provides high-quality fertilizer for strawberry cultivation, achieving the dual goals of resource recycling and industrial efficiency improvement. The technology is replicable and scalable.

[0034] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for preparing a high-efficiency compound fertilizer based on livestock and poultry manure biological liquid, characterized in that, Specifically, the following steps are included: S1. Raw material pretreatment: Fresh livestock and poultry manure is separated into solid and liquid components by screening or extrusion, and the liquid portion is taken as manure slurry. The pH value and carbon-nitrogen ratio of the manure slurry are adjusted. S2. Multi-stage biological fermentation: Through anaerobic fermentation, compound microbial agents carry out aerobic or facultative fermentation. Through the synergistic action of microorganisms and enzymes, the degradation, purification and nutrient release of fecal waste are completed. S3. Compounding and formulation: Based on the nutritional needs of the target crop, chemical fertilizers are added to the fermented liquid, and the NPK ratio is precisely adjusted to form an "organic + inorganic" compound system. Humic acid, seaweed extract, trace element chelating agent and surfactant are added. Through process control, it is ensured that the liquid fertilizer does not separate, precipitate or crystallize during storage. S4. Post-processing and packaging: The liquid fertilizer is filtered, tested, and packaged in sequence to remove residues that may clog the drip irrigation pipes. The finished product is tested for fertilizer efficiency and hygiene indicators. The qualified liquid fertilizer is then filled into barrels or tanks.

2. The method for preparing a high-efficiency compound fertilizer for livestock and poultry manure biological liquid according to claim 1, characterized in that: In step S1, the livestock and poultry manure is one or more of pig manure, chicken manure, and cow manure.

3. The method for preparing a high-efficiency compound fertilizer for livestock and poultry manure biological liquid according to claim 1, characterized in that: Step S2 specifically includes the following steps: S21. Rapid anaerobic fermentation: Add a compound bacterial agent containing highly efficient hydrolytic bacteria and methanogenic bacteria to the manure slurry, and carry out mesophilic or high-temperature fermentation in a closed environment, while controlling the carbon-nitrogen ratio to be 20:1~30:

1. The hydrolysis acidification stage and the methanogenic stage are carried out in different reactors respectively. S22, Aerobic hydrolysis: Add a compound enzyme preparation to the product after anaerobic fermentation and carry out aerobic hydrolysis treatment.

4. The method for preparing a high-efficiency compound fertilizer for livestock and poultry manure biological liquid according to claim 3, characterized in that: The compound microbial agent includes fermenting bacteria, phosphorus- and potassium-solubilizing bacteria, and pathogenic bacteria-inhibiting bacteria. Fermentation bacteria include yeast, lactic acid bacteria, and Bacillus; The pathogenic bacteria are inhibited by actinomycetes; The compound enzyme preparation contains cellulase, hemicellulase, protease, lipase, urease, uricase, and chitinase.

5. The method for preparing a high-efficiency compound fertilizer for livestock and poultry manure biological liquid according to claim 4, characterized in that: The compound enzyme preparation contains enzymes that are selected and compounded to target the components of livestock and poultry manure.

6. The method for preparing a high-efficiency compound fertilizer for livestock and poultry manure biological liquid according to claim 1, characterized in that: The chemical fertilizers used in step S3 include urea, potassium dihydrogen phosphate, and potassium sulfate.

7. The method for preparing a high-efficiency compound fertilizer for livestock and poultry manure biological liquid according to claim 1, characterized in that: In step S4, the fertilizer efficiency indicators include NPK content and organic matter content; the hygiene indicators include the number of pathogens and antibiotic residues.

8. A high-efficiency compound fertilizer for livestock and poultry manure biological liquid, characterized in that: This compound fertilizer is prepared based on the preparation method of a high-efficiency biological liquid compound fertilizer for livestock and poultry manure as described in any one of claims 1-7, and contains macro-elements of nitrogen, phosphorus, and potassium, organic matter, amino acids, trace elements, and beneficial microorganisms.

Images