Pollution-free treatment method of chicken manure and bio-organic fertilizer

Abstract

The application discloses a pollution-free treatment method of chicken manure and a bio-organic fertilizer thereof, and adopts fresh chicken manure, crop straw, weathered coal, coal gangue, zeolite clay, potassium hydroxide, a compound microbial agent, ferrous sulfate and process water supplementing, and the bio-organic fertilizer is obtained through raw material pretreatment and straw activation, chicken manure-calcium synergistic pre-activation, weathered coal alkaline hydrolysis activation, time sequence coupling fermentation and ferrous sulfate early-stage addition fermentation, multi-mineral synergistic in-situ synthesis and ferrous sulfate mid-stage addition fermentation. The application can eliminate the hindering of natural calcium carbonate in chicken manure to humic acid activation, improve the humic acid activation rate, make the straw degradation more sufficient, the fermentation faster, the control of miscellaneous bacteria and stench more stable, the utilization rate of iron element, the removal rate of hydrogen sulfide and the product humic acid iron content significantly improved, the energy consumption and the ammonia gas and hydrogen sulfide emission reduced, and the application has the functions of soil improvement, anti-iron deficiency yellowing and microbial growth promotion, and realizes the synergistic resource utilization of chicken manure, weathered coal, coal gangue and other various wastes.

Description

Technical Field

[0001] This invention relates to a pollution-free treatment method for chicken manure and its bio-organic fertilizer. Background Technology

[0002] With the development of the livestock industry, intensive and large-scale farming has become the mainstream, especially in the chicken farming industry. For example, the harmless treatment and resource utilization of large quantities of fresh chicken manure has become a key issue restricting the industry's green development. For instance, 3% to 8% limestone powder (mainly calcium carbonate) is usually added to laying hen feed to ensure eggshell quality, resulting in laying hen manure naturally containing 1.0% to 2.5% calcium carbonate. This characteristic easily leads to a series of problems during the traditional high-temperature aerobic fermentation process of organic fertilizer.

[0003] 1. Calcium salt precipitation interferes with humic acid activation: Traditional processes often involve directly mixing chicken manure, weathered coal, and alkaline substances (such as potassium hydroxide) for alkaline hydrolysis. The calcium carbonate in the chicken manure reacts with potassium hydroxide to form calcium hydroxide precipitate, or reacts with humic acid to form insoluble calcium humate, which seriously hinders the efficient depolymerization and activation of humic acid in weathered coal and reduces the bioactivity of the product.

[0004] 2. Ferrous sulfate is prone to degradation: Some processes add ferrous sulfate to increase iron nutrition or for chemical nitrogen fixation and deodorization. If added in the early stages of fermentation, ferrous sulfate is easily oxidized and precipitated in an alkaline environment, thus becoming ineffective; if added in the later stages, it cannot fully synergize with the fermentation process, resulting in limited nitrogen fixation, deodorization, and complexation effects.

[0005] 3. High energy consumption and difficulty in controlling odors due to active temperature control: Traditional forced ventilation or active turning temperature control processes are energy-intensive, especially in regions with large diurnal temperature differences such as Xinjiang, resulting in high equipment investment and operating costs. At the same time, high temperatures (>55℃) will exacerbate the volatilization of odorous gases such as ammonia and hydrogen sulfide, causing nitrogen loss and environmental pollution.

[0006] 4. Lack of systematic design for iron nutrition and sulfur fixation: In existing processes, the addition of ferrous sulfate often serves only a single purpose (such as iron supplementation or deodorization), lacking systematic utilization of multiple functions such as simultaneous precipitation of H2S by Fe²⁺ / Fe³⁺, in-situ synthesis of humic iron, and activation of soil phosphorus. Furthermore, no accurate dosage calculation method based on the detection of sulfur content in raw materials has been established.

[0007] 5. Disconnect between economic efficiency and scientific logic: Traditional organic fertilizer production costs are high and product added value is low. Moreover, the process design relies heavily on empirical parameters and lacks systematic consideration of microbial metabolic laws, mineral synergy mechanisms and plant nutrient pathways, making it difficult to achieve the unity of "environmental protection-economic-agronomic benefits".

[0008] Therefore, a method for the pollution-free treatment of chicken manure and the bio-organic fertilizer produced by this method, especially a preparation process that can cleverly utilize the natural calcium carbonate properties of chicken manure, add straw activation with water and Bacillus subtilis activation, avoid calcium interference, thereby achieving efficient utilization of ferrous sulfate, adapting to low-cost environmental temperature control, possessing significant plant nutritional value and economic benefits, and conforming to the scientific logic pathway of organic fertilizer, has emerged as a method for the pollution-free treatment of chicken manure and the bio-organic fertilizer produced by this method, which has important practical significance and market value. Summary of the Invention

[0009] The purpose of this invention is to provide a pollution-free treatment method for chicken manure and a bio-organic fertilizer produced by this method. In particular, it is a process for preparing potassium humate organic fertilizer based on the staged synergistic effect of natural calcium carbonate in chicken manure, activation by adding water to straw, pre-activation by Bacillus subtilis, and staged addition of ferrous sulfate. This invention aims to solve the technical problems in traditional processes, such as calcium salt interference with humic acid activation, easy deactivation of ferrous sulfate, high energy consumption for active temperature control, difficulty in controlling odor, and low iron nutrient utilization efficiency. The invention achieves a bio-organic fertilizer production process and bio-organic fertilizer that enables efficient and harmless treatment of chicken manure resources and conversion into high-value-added products.

[0010] The main raw material composition of this invention is measured by total weight.

[0011] Fresh chicken manure: 550.0~700.0g, used as a nitrogen source, organic matter and natural calcium source.

[0012] Crop straw: 120.0~200.0g, used for water activation, adjusting carbon-nitrogen ratio and improving air permeability.

[0013] Weathered coal: 60.0–100.0 g, as a precursor of potassium humate.

[0014] Coal gangue: 30.0~50.0g, serving as a porous mineral carrier, providing pH buffering and nitrogen adsorption and fixation functions.

[0015] Zeolite clay: 30.0~60.0g, used as a porous adsorbent material to enhance the adsorption of malodorous gases.

[0016] Potassium hydroxide: 15.0~24.0g, agricultural grade, used as an independent alkaline hydrolysis activator for weathered coal.

[0017] Compound microbial agent: 3.0–8.0 g, with a ratio of Bacillus subtilis to Bacillus licheniformis of 1.5:1 to 1:1.5, and a viable count ≥1.0 × 10⁻⁶. 9 CFU / g.

[0018] Ferrous sulfate: Total amount 2.0–5.0 g.

[0019] Processing water replenishment: 60.0~130.0g, clean fresh water, used for straw activation and overall moisture content adjustment.

[0020] Preferably, exogenous calcium carbonate (1.0–10.0 g) can be added to the above-mentioned raw materials for dynamic supplementation when the natural calcium content of chicken manure is low. Exogenous calcium carbonate can also be directly used as finished calcium powder.

[0021] The production of the bio-organic fertilizer of the present invention mainly includes the following process steps.

[0022] Raw material pretreatment: Crop straw, weathered coal, coal gangue, and zeolite clay are crushed separately and passed through a 5-10mm mesh screen. Fresh chicken manure does not need to be crushed; it can be passed through an 8-12mm vibrating screen to filter out chicken feathers and ensure uniform particle size.

[0023] Ferrous sulfate should be weighed and prepared separately according to the initial and intermediate usage amounts, and contact with alkaline materials should be avoided throughout the process.

[0024] Straw activation: Take all the crop straw needed, add 30% to 40% of the total water replenishment with clean fresh water, soak and stir thoroughly, then add Bacillus subtilis from all the compound microbial agents, and pre-activate in a sealed container at 25 to 30°C for 10 to 15 hours to allow the straw fibers to fully swell and Bacillus subtilis to proliferate rapidly, thus obtaining the straw-microbial agent activated material for later use.

[0025] The specific processing procedure is as follows.

[0026] The first stage involves synergistic pre-activation of chicken manure and calcium: Fresh chicken manure (1 / 3 to 2 / 3 of the total formula amount) is mixed evenly with all coal gangue powder and dynamically added exogenous calcium carbonate, and then pre-activated in a sealed pile for 20-30 hours. The natural calcium carbonate from the chicken manure and the supplemented calcium form a pH buffer system, providing a stable substrate for subsequent humic acid complexation.

[0027] The second stage is the alkaline decomposition and activation of weathered coal: take weathered coal powder, add process water to potassium hydroxide until fully dissolved to prepare a potassium hydroxide solution, and fully soak the weathered coal powder without adding any calcium carbonate (including natural calcium carbonate from chicken manure). Place it in a sealed container and activate it at a constant temperature of 25-30℃ for 10-15 days, stirring once a day during the period, to obtain a highly active weathered coal humic acid precursor material A without calcium interference.

[0028] The third stage: time-coupled fermentation and early addition of ferrous sulfate.

[0029] Take the remaining fresh chicken manure from the first stage, mix it evenly with the above-mentioned straw-microbial agent activated material and the remaining Bacillus licheniformis from the compound microbial agent, add the remaining process water, and adjust the moisture content to 55%–65%. Introduce this mixture into the pre-activated substrate system, and at the same time add 30%–50% of the total ferrous sulfate as the initial ferrous sulfate. After stirring evenly, carry out aerobic-anaerobic alternating fermentation for 10–15 days.

[0030] The fermentation process is entirely dependent on ambient temperature, with no active heating. The temperature of the pile is regulated to ≤45℃ by covering it with a film, and the pile is turned over once a day. In the early stages, ferrous sulfate achieves the following: chemical fixation of hydrogen sulfide and ammonia during the fermentation start-up phase, reducing odor at the source; the formation of preliminary complexes between ferrous ions and early-formed organic intermediates, laying the foundation for the synthesis of ferrous humate; and reducing early nitrogen loss through the complexation of ferrous ions and ammonia, resulting in fermentation material B containing the initial iron source.

[0031] Phase 4: Multi-mineral synergistic in-situ synthesis and mid-term addition of ferrous sulfate.

[0032] Mix the material A obtained in the "second stage" step, the total amount of zeolite clay powder, and 50% to 70% of the total amount of ferrous sulfate as intermediate ferrous sulfate with the material B obtained in the "third stage" step, and continue fermentation for 10 to 15 days.

[0033] During this stage, temperature control continues to rely on ambient temperature and a film coating, with the reactor temperature ≤45℃.

[0034] The core reactions include: potassium humate in material A reacts in situ with ferrous and ferric ions added in the middle stage to generate ferric humate; the iron-organic intermediate that existed in the early stage further complexes with humic acid to form a more stable chelate structure; the synergistic adsorption of coal gangue and zeolite clay, combined with the chemical fixation of ferrous sulfate in two stages, achieves efficient nitrogen fixation and deodorization; and the three-in-one functional integration of "sulfur fixation-iron activation-humic acid chelation" is completed to obtain the decomposed material.

[0035] Post-processing and finished product preparation: The decomposed material is dried and crushed twice, then passed through a sieve with a pore size of 2-10 mm, or granulated. The moisture content is tested and found to be no more than 25%, thus obtaining the bio-organic fertilizer of this invention.

[0036] The core chemical reactions and synergistic mechanisms of this invention are as follows: (1) Basic chemical reactions: weathered coal alkali decomposition reaction: R-COOH+KOH→R-COOK+H2O, generating potassium humate; ferrous sulfate desulfurization reaction: Fe²⁺+S²⁻→FeS↓, eliminating the malodor of hydrogen sulfide; ferrous humate in-situ complexation reaction: R-COOK+Fe²⁺ / Fe³⁺→R-COOFe+K⁺; ammonia complexation fixation reaction: Fe²⁺+6NH3→[Fe(NH3)6]²⁺, the intermediate state is further converted into stable ammonium salt; straw hydrolysis activation: cellulose / hemicellulose is degraded into small molecule sugars and organic acids under hydrothermal and Bacillus subtilis action. (2) Mechanism of straw activation with water and Bacillus subtilis action: The straw is swollen with water, which destroys the fiber structure and improves the efficiency of subsequent fermentation and degradation; Bacillus subtilis is activated and proliferated in advance to form a dominant bacterial group and inhibit the production of miscellaneous bacteria and malodor; the bacterial agent is colonized in advance to improve the fermentation start-up speed and enhance the ability of organic matter decomposition and humic acid synthesis; (3) Scientific principle of ferrous sulfate staged addition: The present invention adopts a staged addition strategy of "30%~50% in the early stage + 50%~70% in the middle stage": Early stage (fermentation day 0): early desulfurization and deodorization, pre-complexing iron-organic matter, inhibiting ammonia volatilization, timely capture of gaseous pollutants, and storage of active iron source; Middle stage (fermentation day 14): original Synthetic humic iron, deep nitrogen fixation and desulfurization, bridging mineral-organic system, matching the peak of hydrogen sulfide production with the optimal reaction window of pH 7.0-8.0, avoiding iron aging failure; (4) Synergistic effect mechanism of phased addition: temporal complementarity: the iron source in the early stage undertakes the "pre-capture" function, the iron source in the middle stage undertakes the "deep synthesis" function, the two iron sources form a functional relay, the total iron utilization rate is 25%-35% higher than that of single addition; morphological optimization: the ferrous ions added in the early stage are partially converted into ferric ions in the weakly alkaline environment, forming a mixed system of ferrous and ferric ions with the ferrous ions added in the middle stage, which is conducive to the generation of humic iron with different coordination structures and broadens its pH adaptability. ; Slow-release effect: The iron-organic intermediate formed in the early stage slowly releases ferrous ions in the subsequent fermentation, forming a dual supply mode of "fast-acting + slow-acting" with the iron source added in the middle stage, extending the fertilizer effect period of the product; Improved economy: The phased addition can reduce the amount of feed per batch, avoid the oxidation failure of ferrous ions caused by local overconcentration, and increase the functional output by more than 30% under the same total amount; (5) Mineral synergistic system: The present invention constructs a quaternary synergistic system of "coal gangue (rigid skeleton) + zeolite clay (microporous adsorption) + weathered coal humic acid (organic ligand) + Fe²⁺ / Fe³⁺ (bridging agent)", and the ferrous sulfate added in phases forms a time-matched interaction network with each component.

[0037] The multidimensional value of ferrous sulfate added in stages is discussed as follows: (1) Enhancement of plant nutrition: Dual supply of iron nutrition: The iron-organic intermediate formed by the addition in the early stage provides fast-acting iron, and the humic iron synthesized in situ in the middle stage provides slow-acting chelated iron. The two stages work together to achieve the iron supply mode of "fast-acting + long-acting"; Matching the timing of phosphorus activation: In the early stage, ferrous ions and organic acids work together to activate some fixed phosphorus, and in the middle stage, humic iron continues to activate, improving the utilization rate of phosphate fertilizer throughout the cycle; Superimposed effect of quality improvement: The iron sources in the two stages participate in different metabolic pathways such as early nitrogen metabolism and later photosynthesis, forming a superimposed effect of quality improvement; (2) Further optimization of economic significance: The addition in stages can reduce the concentration of ferrous sulfate feed per feeding, avoid local oxidation failure, improve the deodorization efficiency under the same total dosage, and further save deodorization costs. The utilization rate of iron source is improved, the total amount of ferrous sulfate used under the same product indicators can be reduced, the raw material cost has room for further reduction, and the ferrous humate content in the product is more stable; (3) Systematic demonstration of scientific logic pathway: Material transformation logic: In the early stage, the iron source participates in the early organic matter decomposition and metabolism, and in the middle stage, the iron source participates in the humic acid recombination and synthesis. The two iron sources are adapted to different material transformation stages respectively, forming a complete element cycle chain; Reaction sequence logic: In the early stage of 0 to 14 days, divalent iron ions undertake the "pre-capture" function, and in the middle stage of the peak period of hydrogen sulfide production on day 14, divalent iron ions play a role in the "pre-capture" function. Iron ions play a "deep fixation" role, with two phases of addition precisely targeting pollutant generation to achieve full-process coverage; Microbial synergistic logic: In the early stage, ferrous ions can promote the metabolic activity of aerobic bacteria such as Bacillus subtilis, and in the middle stage, ferrous ions synergistically promote the formation of humic acid-mineral-bacterial complexes with the metabolites of Bacillus licheniformis; Mineral synergistic logic: In the early stage, ferrous ions preferentially bind to the active sites on the surface of coal gangue, and in the middle stage, ferrous ions complex with humic acid in the pores of zeolite clay. The iron sources in the two stages form spatial partitions on the mineral carrier, avoiding competitive adsorption.

[0038] Compared with existing technologies, this invention has the following beneficial effects: 1. Avoiding calcium salt interference: Through the independent alkaline activation process of weathered coal, the hindrance of natural calcium carbonate in chicken manure to humic acid activation is completely eliminated, improving the humic acid activation rate; 2. Added straw and Bacillus subtilis activation: Straw degradation is more complete, fermentation starts faster, and the control of miscellaneous bacteria and odors is more stable; 3. Ferrous sulfate staged enhancement: Iron utilization rate, hydrogen sulfide removal rate, and iron humic acid content of the product are significantly improved, and the fertilizer effect period is extended; 4. Low-cost environmental film covering for temperature and odor control: No active heating is required throughout the process, and film covering is used to control the temperature to ≤45℃, significantly reducing energy consumption, making it especially suitable for promotion and application in areas with large diurnal temperature differences such as Xinjiang; 5. High efficiency. Nitrogen fixation and deodorization: The synergistic effect of physical adsorption and chemical fixation reduces ammonia and hydrogen sulfide emissions by 50% and increases nitrogen retention rate to 50%; 6. Diverse product functions: The resulting organic fertilizer has soil improvement, iron deficiency chlorosis resistance, and microbial growth promotion functions. In calcareous soil areas, it can reduce the incidence of iron deficiency chlorosis in crops; 7. Significant economic benefits: Utilizing inexpensive weathered coal, coal gangue, and other industrial and mining wastes to replace high-priced raw materials, combined with reduced energy consumption and increased product added value, the overall production cost decreases and the product value increases; 8. Outstanding environmental benefits: Achieving the synergistic resource utilization of various solid wastes such as chicken manure, weathered coal, and coal gangue, which is in line with the national agricultural green development and circular economy policy. Detailed Implementation

[0039] Example 1: Based on a total processed weight of 1000g: 650g fresh chicken manure, with a calcium carbonate content of 2.1%, 150g corn stalks, 80g weathered coal, with a humic acid content of not less than 60%, 40g coal gangue powder, 0g exogenous calcium carbonate, 45g zeolite clay powder, 20g potassium hydroxide, 5g compound microbial agent, Bacillus subtilis: Bacillus licheniformis = 1:1, 3.5g ferrous sulfate (1.4g in the early stage, accounting for 40%), 2.1g in the middle stage, accounting for 60%), and 100g of process water.

[0040] Raw material pretreatment: Crop straw, weathered coal, coal gangue, and zeolite clay are crushed separately and passed through a 5-10mm mesh screen. Fresh chicken manure is not crushed but only passed through a 10mm vibrating screen to filter out chicken feathers, ensuring uniform particle size.

[0041] Straw activation with water: Soak corn straw in 30-40g of water, inoculate with 2.5g of Bacillus subtilis for pre-activation for 12h to obtain straw-bacterial agent activated material for later use.

[0042] The first stage involves synergistic pre-activation of chicken manure and calcium: 1 / 3 to 2 / 3 of the total formula amount of fresh chicken manure is mixed evenly with all coal gangue powder and dynamically added exogenous calcium carbonate, and then pre-activated in a sealed pile for 24 hours. The natural calcium carbonate from the chicken manure and the supplemented calcium form a pH buffer system, providing a stable substrate for subsequent humic acid complexation.

[0043] In the second stage, weathered coal is activated by alkaline decomposition. Weathered coal powder is taken, and process makeup water is added to potassium hydroxide until fully dissolved to prepare a potassium hydroxide solution. The solution is then fully soaked in the weathered coal powder without adding any calcium carbonate (including natural calcium carbonate from chicken manure). The solution is placed in a sealed container and activated for 14 days at a constant temperature of 25-30°C, with stirring once a day during the period. This process yields a highly active weathered coal humic acid precursor material A without calcium interference.

[0044] Phase 3: Sequential Coupling Fermentation and Pre-Ferrous Sulfate Addition. Take the remaining fresh chicken manure from Phase 1 and mix it evenly with the above-mentioned straw-microbial agent activated material and the remaining Bacillus licheniformis from the compound microbial agent. Add the remaining process water to adjust the moisture content to 55%–65%. Introduce this mixture into the pre-activated substrate system, and simultaneously add 30%–50% of the total ferrous sulfate as pre-ferrous sulfate. After stirring evenly, carry out aerobic-anaerobic alternating fermentation for 10–15 days. Alternate between aerobic and anaerobic fermentation every 0.5–2 days, such as 1 day of aerobic fermentation followed by 1 day of anaerobic fermentation, or 1 day of aerobic fermentation followed by 2 days of anaerobic fermentation.

[0045] The fermentation process is entirely dependent on ambient temperature, with no active heating. The temperature of the pile is regulated to ≤45℃ by covering it with a film, and the pile is turned over once a day. In the early stages, ferrous sulfate achieves the following: chemical fixation of hydrogen sulfide and ammonia during the fermentation start-up phase, reducing odor at the source; the formation of preliminary complexes between ferrous ions and early-formed organic intermediates, laying the foundation for the synthesis of ferrous humate; and reducing early nitrogen loss through the complexation of ferrous ions and ammonia, resulting in fermentation material B containing the initial iron source.

[0046] Fourth stage: Multi-mineral synergistic in-situ synthesis and mid-term addition of ferrous sulfate. The material A obtained in the second stage, the total amount of zeolite clay powder, and 50% to 70% of the total amount of ferrous sulfate are mixed evenly with the material B obtained in the third stage as mid-term ferrous sulfate, and fermentation is continued for 10 to 15 days.

[0047] During this stage, temperature control continues to rely on ambient temperature and a film coating, with the reactor temperature ≤45℃.

[0048] The core reactions include: potassium humate in material A reacts in situ with ferrous and ferric ions added in the middle stage to generate ferric humate; the iron-organic intermediate that existed in the early stage further complexes with humic acid to form a more stable chelate structure; the synergistic adsorption of coal gangue and zeolite clay, combined with the chemical fixation of ferrous sulfate in two stages, achieves efficient nitrogen fixation and deodorization; and the three-in-one functional integration of "sulfur fixation-iron activation-humic acid chelation" is completed to obtain the decomposed material.

[0049] Post-processing and finished product preparation: The decomposed material is dried and crushed twice, then passed through a sieve with a pore size of 2-10 mm, or granulated. The moisture content is tested and found to be no more than 25%, thus obtaining the bio-organic fertilizer of this invention.

[0050] Ferrous sulfate should be weighed and prepared separately according to the initial and intermediate usage amounts, and contact with alkaline materials should be avoided throughout the process.

[0051] Following the above steps, the finished product testing results are as follows: moisture content 25%, organic matter 30%, total nutrients 5.3%, potassium humate 5%, iron humate (calculated as iron) 0.5%, and effective viable bacteria count 5 × 10⁻⁶. 7 CFU / g. Compared with the single-addition process, odor emissions are reduced, while nitrogen retention and ferric humate content are increased.

[0052] Example 2: Based on a total processed weight of 1000g: 600g fresh chicken manure, 180g rice straw, 70g weathered coal (humic acid content not less than 60%), 35g coal gangue powder, 50g zeolite clay powder, 18g potassium hydroxide, 6g compound microbial agent, 4.0g ferrous sulfate (1.6g in the early stage, accounting for 40%, and 2.4g in the middle stage, accounting for 60%), and 110g of process water. The calcium carbonate content was tested at 1.2%, which is slightly low; therefore, 8g of exogenous calcium carbonate was added. Exogenous calcium carbonate can also be directly used from finished calcium powder.

[0053] Raw material pretreatment: Crop straw, weathered coal, coal gangue, and zeolite clay are crushed separately and passed through a 5-10mm mesh screen. Fresh chicken manure is not crushed but only passed through a 10mm vibrating screen to filter out chicken feathers, ensuring uniform particle size.

[0054] Straw activation with water: Soak rice straw in 33-44g of water, inoculate with 3g of Bacillus subtilis and pre-activate for 12h to obtain straw-bacterial agent activated material for later use.

[0055] The process was then carried out according to the established procedures. The final product test results were as follows: moisture content 25%, organic matter 30%, total nutrients 5.0%, potassium humate 5%, iron humate (calculated as iron) >0.5%, and effective viable bacteria count 5.0 × 10⁻⁶. 7 CFU / g.

[0056] The above are merely preferred embodiments of the present invention. It should be noted that the above preferred embodiments should not be considered as limitations on the present invention, and the scope of protection of the present invention should be determined by the scope defined in the claims. For those skilled in the art, various improvements and modifications can be made without departing from the spirit and scope of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A method for the pollution-free treatment of chicken manure, characterized in that... It includes the following processes: The following raw materials are to be taken by weight: fresh chicken manure: 550.0-700.0g, crop straw: 120.0-200.0g, weathered coal: 60.0-100.0g, coal gangue: 30.0-50.0g, zeolite clay: 30.0-60.0g, potassium hydroxide: 15.0-24.0g, compound microbial agent: 3.0-8.0g, with a ratio of Bacillus subtilis to Bacillus licheniformis of 1.5:1 to 1:1.5, ferrous sulfate: 2.0-5.0g, and process water: 60.0-130.0g; Raw material pretreatment: Crop straw, weathered coal, coal gangue, and zeolite clay are crushed separately and passed through a 5-10 mm mesh screen, while fresh chicken manure is passed through an 8-12 mm screen. Straw activation: Take all the crop straw required, add 30% to 40% of the total water volume of clean fresh water, soak and stir thoroughly, then add Bacillus subtilis from all the compound microbial agents, and pre-activate in a sealed container at 25 to 30°C for 10 to 15 hours to allow the straw fiber to fully swell and Bacillus subtilis to multiply rapidly, thus obtaining the straw-microbial agent activated material for later use; The specific processing procedure is as follows: The first stage is the synergistic pre-activation of chicken manure and calcium: Take 1 / 3 to 2 / 3 of the total amount of fresh chicken manure in the formula, mix it evenly with all the coal gangue powder and dynamically added exogenous calcium carbonate, and pre-activate it in a sealed pile for 20 to 30 hours. The second stage is the alkaline decomposition and activation of weathered coal: take weathered coal powder, add process water to potassium hydroxide until fully dissolved to prepare potassium hydroxide solution, and fully soak the weathered coal powder in the solution. Place it in a sealed container and activate it at a constant temperature of 25-30℃ for 10-15 days, stirring 1-2 times a day during the period to obtain material A. Third stage: Sequential coupled fermentation and early addition of ferrous sulfate: Take the fresh chicken manure remaining from the first stage, mix it evenly with the above-mentioned straw-microbial agent activated material and Bacillus licheniformis in the remaining compound microbial agent, add the remaining process water, adjust the moisture content to 55% to 65%, inoculate the mixture into the pre-activated matrix system, and at the same time add 30% to 50% of the total amount of ferrous sulfate as early ferrous sulfate. After stirring evenly, ferment for 10 to 15 days at a fermentation temperature ≤ 45℃ to obtain fermented material B containing early iron source; Fourth stage: Multi-mineral synergistic in-situ synthesis and mid-term addition of ferrous sulfate: 50% to 70% of the total amount of material A obtained in the second stage, zeolite clay powder, and ferrous sulfate is mixed with material B obtained in the third stage as mid-term ferrous sulfate and fermented for 10 to 15 days at a fermentation temperature ≤45℃ to obtain decomposed material. Post-processing and finished product preparation: The decomposed material is dried and crushed twice, then passed through a sieve with a pore size of 2-10 mm, or granulated, with the moisture content controlled to not exceed 25%, to obtain the bio-organic fertilizer of this invention.

2. The method for pollution-free treatment of chicken manure according to claim 1, characterized in that: The raw materials may also contain 1.0 to 10.0 g of exogenous calcium carbonate.

3. The method for pollution-free treatment of chicken manure according to claim 1 or 2, characterized in that: The third stage of time-coupled fermentation and the fermentation with the addition of ferrous sulfate in the early stage are aerobic-anaerobic alternating fermentations.

4. A bio-organic fertilizer, characterized in that... Chicken manure is prepared according to any one of claims 1-3 using a pollution-free treatment method.