CN112374949A - Method for producing organic fertilizer by straw bed-lying padding and livestock and poultry manure combined anaerobic fermentation biogas residue - Google Patents

Method for producing organic fertilizer by straw bed-lying padding and livestock and poultry manure combined anaerobic fermentation biogas residue Download PDF

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Publication number
CN112374949A
CN112374949A CN202011289973.3A CN202011289973A CN112374949A CN 112374949 A CN112374949 A CN 112374949A CN 202011289973 A CN202011289973 A CN 202011289973A CN 112374949 A CN112374949 A CN 112374949A
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anaerobic fermentation
organic fertilizer
livestock
straw
producing organic
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CN202011289973.3A
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孙海龙
石云霞
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Inner Mongolia Huameng Kechuang Environmental Protection Technology Engineering Co ltd
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Inner Mongolia Huameng Kechuang Environmental Protection Technology Engineering Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F3/00—Fertilisers from human or animal excrements, e.g. manure
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
    • C05F17/70—Controlling the treatment in response to process parameters
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
    • C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
    • C05F17/80—Separation, elimination or disposal of harmful substances during the treatment
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G3/00—Mixtures of one or more fertilisers with additives not having a specially fertilising activity
    • C05G3/80—Soil conditioners
    • C—CHEMISTRY; METALLURGY
    • C05—FERTILISERS; MANUFACTURE THEREOF
    • C05G—MIXTURES OF FERTILISERS COVERED INDIVIDUALLY BY DIFFERENT SUBCLASSES OF CLASS C05; MIXTURES OF ONE OR MORE FERTILISERS WITH MATERIALS NOT HAVING A SPECIFIC FERTILISING ACTIVITY, e.g. PESTICIDES, SOIL-CONDITIONERS, WETTING AGENTS; FERTILISERS CHARACTERISED BY THEIR FORM
    • C05G5/00—Fertilisers characterised by their form
    • C05G5/10—Solid or semi-solid fertilisers, e.g. powders
    • C05G5/12—Granules or flakes
    • 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 provides a method for producing organic fertilizer by straw bed-lying padding and livestock and poultry manure combined anaerobic fermentation biogas residue. Specifically, the method comprises the following steps: the straw bedding materials and the livestock and poultry manure are subjected to medium-temperature anaerobic fermentation, the fermentation temperature is controlled to be 37 +/-3 ℃, the pH value is controlled to be 6.5-7.5, and the hydraulic retention time is 20-40 days. And (3) carrying out solid-liquid separation on the anaerobic fermentation liquor by adopting a horizontal spiral discharge decanter centrifuge, and adjusting and dehydrating separated solid components to ensure that the mass ratio of carbon to nitrogen in the biogas residues is 25-30: 1 and the particle size of the material is 10-30 mm. And (3) piling the primarily prepared materials into strips to ferment, wherein the height of the pile of materials is not more than 80cm, and the width of the bottom of the pile of materials is about 500-800 cm. Keeping the fermentation temperature at 60-70 ℃ for 15-20 days, and turning and throwing the materials every 2-3 days. And keeping the fermented materials at 40-50 ℃ for 10-12 days, and turning and throwing the fermented materials once every 2-3 days to obtain compost rotten clinker. And (3) granulating the compost rotten clinker into particles with the particle size of 3-5 mm, and filling the particles into 25kg per bag to obtain the organic fertilizer. The method for producing the organic fertilizer by combining straw bed padding and livestock and poultry excrement and sewage with anaerobic fermentation biogas residues can solve the problem of secondary pollution generated by anaerobic fermentation, solve the problems of idle straw, incineration and the like, solve the problem of utilization of the excrement and sewage in a farm, and improve the utilization rate of the straw.

Description

Method for producing organic fertilizer by straw bed-lying padding and livestock and poultry manure combined anaerobic fermentation biogas residue
Technical Field
The invention relates to the technical field of organic fertilizer production, in particular to a method for producing an organic fertilizer by straw bed padding and livestock and poultry manure combined anaerobic fermentation biogas residues; simultaneously, the utility model also relates to the technical fields of environmental pollution treatment, organic waste recycling and padding in animal husbandry.
Background
Chinese crops are various in types, and mainly comprise wheat, rice, corn, beans, potatoes, cotton, peanuts, rape, sugarcane and other coarse cereal crops. According to statistics, the total theoretical resource amount of the Chinese straws reaches 10.2 hundred million tons in 2017, wherein the amounts of the corn straws, the rice straws and the wheat straws are respectively 4.3 hundred million tons, 2.4 hundred million tons and 1.8 hundred million tons, and the ratio of the straws of the three crops reaches 83.3 percent. The amount of the collectable resources of the straws in China is 8.4 hundred million tons. The straw can be used for producing padding in a farm after being sterilized and crushed.
The straw bed-lying padding only uses crop straws which are single raw materials, and other processing is not needed to be carried out on the padding, so that the processing steps of the padding are reduced, the operation is simple, and the practicability is high. The crops are relatively soft after being crushed, the comfort level of the cattle lying in bed is improved, and the cattle lying in bed ruminates are suitable, so that the production capacity of the cattle lying in bed is improved. Microbial agents do not need to be added in the manufacturing process of the straw bed-lying padding, so that the cost is further reduced. The straw bedding material for the bed is clean and environment-friendly, can be recycled, and has high utilization efficiency. The straw bedding material uses crop straws as raw materials, belongs to renewable resources, solves the problems of idle straw, incineration and the like, and solves the problem of recycling the excrement in the farm; the used straw bedding material for bed has wide application, and can be directly returned to the field; can also be used for the production of substrates used for cultivating edible fungi or flowers; as the manure of the straws and the cattle contains more organic matters, the organic matters can be fully utilized to carry out anaerobic fermentation to produce the methane, so that the phenomenon of accumulation of a large amount of manure in a farm is avoided, the condition of incapability of recycling is avoided, and the high-value, high-efficiency and comprehensive utilization of agricultural wastes is improved.
With the development of modern agriculture in China, the quantity and the types of agricultural products are greatly enriched, but simultaneously, a plurality of problems to be solved urgently are brought, such as livestock and poultry manureDischarging organic wastes such as sewage and the like. According to statistics, the discharge amount of the excrement of Chinese livestock and poultry in 2017 reaches 3.98 × l09t, but the utilization rate is lower than 60 percent, and the yield of the domestic livestock and poultry manure in 2020 is expected to reach 4.24 xl 09t。
At present, livestock and poultry breeding in China gradually develops towards intensification, scale and specialization, so that the livestock and poultry manure is greatly increased, pollution is in a concentrated trend, a plurality of large pollution sources appear, the livestock and poultry pollution prevention measures are relatively lagged, the livestock and poultry manure cannot be effectively treated, and the soil, the water body and the atmosphere can be seriously influenced. Livestock and poultry manure contains a plurality of pathogenic bacteria, ammonia nitrogen, nitrogen and phosphorus compounds, trace elements and heavy metals, and the soil structure can be damaged if the livestock and poultry manure is directly returned to the field for use or is not properly treated. Pathogenic bacteria, heavy metals, nitrogen and phosphorus compounds and organic matters in the livestock and poultry manure can cause water body damage and pollute water sources, and after the culture wastewater is discharged, the surrounding water body and soil can be influenced through surface runoff or underground water, so that the surrounding water body is eutrophicated. Mercaptan, ammonia gas, hydrogen sulfide, skatole and the like in the livestock and poultry manure pollute the atmosphere and influence the air quality, wherein the influence of the ammonia gas is the greatest. The livestock and poultry manure is also a valuable agricultural resource, and the livestock and poultry manure contains a large amount of nutrient elements required by plant growth, such as N, P, K, and the like, so that the livestock and poultry manure has high recycling value. The dry matter of cow dung has crude protein content, crude fat content and crude fiber content of 13.74%, 1.65% and 43.60%. With the national emphasis on environmental protection and the stricter environmental regulations, the problem of non-point source pollution caused by the discharge of livestock and poultry feces is widely concerned. Because the livestock and poultry farms are dispersed and have light environmental awareness for a long time, and the necessary guidance and constraint are lacked, the difficulty in preventing and treating the livestock and poultry breeding pollution problem is increased, and the livestock and poultry breeding pollution becomes the most important non-point source pollution source.
The pollution problem caused by the livestock and poultry manure is solved in the aspects of main source reduction, harmless treatment, resource utilization and the like of the government of China, and the technology for resource utilization of the livestock and poultry manure mainly comprises 3 aspects of feed treatment, fertilizer treatment, energy utilization and the like of the livestock and poultry manure. The method for producing the biogas by anaerobic fermentation of the livestock and poultry manure is the most economic and effective livestock and poultry manure treatment mode, the biogas is a clean and efficient renewable energy source, and the livestock and poultry manure biogas gasification technology is mature, the process is simple, and the method becomes a hotspot of current research. The livestock and poultry manure biogas gasification can not only generate clean energy, but also generate biogas slurry and biogas residues after fermentation, and can be used for producing organic fertilizers, so that the crop yield is increased.
The anaerobic fermentation technology can be used for converting wastes such as straw bedding, livestock and poultry manure and the like into energy substances, the purposes of reducing pollution and protecting the environment are achieved, and meanwhile, the anaerobic fermentation technology has environmental, social and economic benefits, but a large amount of biogas residues can be generated, and if the biogas residues are not properly treated, pollutants such as high-concentration organic matters and pathogenic microorganisms can enter the environment, so that resource waste is caused, and secondary pollution is caused. Therefore, the research on the resource utilization of the biogas residues has important research significance and application value, and the utilization of the biogas residues for composting is an important means for the resource and harmless utilization of the biogas residues.
The biogas residues generated after the straw bedding materials and the livestock and poultry manure are subjected to combined anaerobic fermentation are subjected to solid-liquid separation when the fertilizer is processed, and the formed biogas residues and biogas slurry can be used respectively according to different fertilizer effects, so that the biogas residues and the biogas slurry can be processed into different types of organic fertilizers. Because the content of solids such as biogas residue fibers and the like generated after straw fermentation is high, the concentration of biogas slurry is high, and the colloid property is strong, effective measures must be taken to realize the effective separation of the biogas residue and the biogas slurry.
The compost fermentation can stabilize organic matters and kill pathogenic microorganisms at the same time in a high-temperature fermentation stage. The final product compost can also increase soil fertility, enrich soil microbial composition and regulate soil structure. Compared with other solid organic waste composts, the biogas residue compost has high organic matter content, low C/N and high water content, is the resource utilization of anaerobic residues, can further realize the cyclic utilization of resources and reduce the harm to the environment.
In order to obtain a good biogas residue compost product, the factors such as temperature, water content, ventilation rate, pH value, C/N and the like need to be properly controlled in the composting process, wherein the ventilation rate is related to the microbial activity, the decomposition rate of organic matters and the change of temperature in the composting process and is one of important parameters influencing the composting process and the quality of the compost product, and the composting process is influenced by the anaerobic environment in a composting system due to the low ventilation rate; too high ventilation rate can cause too much heat loss and influence the maintenance time of a high-temperature stage in the composting process, so that the selection of proper ventilation rate is the premise of carrying out efficient aerobic composting, and the ventilation rate needs to be controlled in the composting process.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for producing an organic fertilizer by biogas residues generated by the combined anaerobic fermentation of straw bed-lying padding and livestock and poultry manure, the method simultaneously completes the separation of the biogas residues and biogas slurry and the production of the organic fertilizer, the effluent quality is stable and good, and the utilization value of the biogas residues is realized; the quality of the liquid fertilizer is improved; no additional substance is needed, and the optimization of the product quality is ensured.
In order to achieve the above object, the following technical solutions are adopted.
Adding straw bedding materials and livestock and poultry excrement into an anaerobic fermentation device for anaerobic fermentation, degrading organic matters and producing methane;
the anaerobic fermentation adopts medium-temperature anaerobic fermentation, the fermentation temperature is controlled to be 37 +/-3 ℃, the pH is controlled to be 6.5-7.5, the hydraulic retention time is 20-40 days, and the medium-temperature anaerobic fermentation is combined to produce biogas, biogas residues and biogas slurry.
And pumping fermentation liquor generated by the anaerobic fermentation of the straw bed-lying padding and the livestock and poultry manure by using a sewage pump out of the fermentation tank, and directly feeding the pumped fermentation liquor into a horizontal spiral discharging sedimentation type centrifuge for solid-liquid separation under the action of centrifugal force.
After fermentation liquor enters the inner cavity of the rotary drum body rotating at a high speed from the feeding hole, solid matters with higher specific gravity in the fermentation liquor are quickly settled on the inner wall of the rotary drum under the action of centrifugal force and are discharged out of the rotary drum body from a solid phase outlet by the spiral pusher; the liquid phase with smaller specific gravity forms an inner liquid ring under the action of centrifugal force and is discharged out of the rotary drum body through a liquid phase overflow port.
The rotary drum and the spiral pusher run at high speed simultaneously, and solid matters settled on the wall of the rotary drum are continuously pushed to a solid phase outlet by the spiral pusher to be discharged due to a certain speed difference between the rotary drum and the spiral pusher, so that the whole separation process is continuously carried out.
The horizontal spiral discharging sedimentation type centrifuge adopts a large length-diameter ratio design, so that the retention time of materials in the rotary drum is prolonged, and the solid matter removal efficiency is high; meanwhile, a large cone angle structure is adopted, so that the extrusion force of the spiral body on the filter cake is enhanced, the solid content of the filter cake is improved, and the solid-liquid separation effect is enhanced.
The horizontal spiral discharging decanter centrifuge adopts a vortex structure to accelerate materials to enter the rotary drum, reduces the disturbance of the materials to a separated solid phase, improves the processing capacity, avoids the blockage in the spiral body and the locking of the feeding pipe, and prolongs the service life of the spiral body.
The wear resistance of the horizontal spiral discharging decanter centrifuge spiral body and other key parts is enhanced in a hard alloy coating mode, and the service life can be prolonged by more than 5 times.
The rotary drum of the horizontal spiral discharging decanter centrifuge adopts an anti-abrasion strip structure, so that the inner wall of the rotary drum is effectively prevented from being abraded, and filter residues are convenient to discharge.
After separation by a horizontal spiral discharge decanter centrifuge, the solid content in the biogas slurry is lower than 1%, and the water content of biogas residues is 60-70%, so that the method can be used for producing organic fertilizers.
Discharging the biogas residues after solid-liquid separation to a conveyor belt through a solid-phase outlet of a centrifugal machine, and conveying the biogas residues to a biogas manure processing workshop; the biogas slurry is discharged into a liquid pumping pipeline and enters a liquid storage tank.
And adjusting the content of carbon and nitrogen in the dehydrated biogas residues to ensure that the mass ratio of carbon to nitrogen in the biogas residues is 25-30: 1, the PH is neutral or alkalescent, and simultaneously crushing the materials and the particle size of the materials is 10-30 mm.
Controlling the water content in the primarily prepared materials to be 60-70%, and piling the materials into strips for fermentation; the height of the material pile is not more than 80cm, and the width of the bottom of the material pile is about 500-800 cm.
Before the surface temperature of the fermentation material rises to 60-70 ℃, the air is introduced at a speed of about 3-4 m3Min; when the surface temperature of the fermentation material rises to 60-70 ℃, the air introduction speed is about 1-2 m3Min; keeping the fermentation temperature at 60-70 ℃ for 15-20 days every dayAnd turning and throwing the materials for 2-3 days.
Cooling the fermented material to 40-50 ℃, wherein the air introduction speed is about 4-6 m3Min; when the temperature is reduced to 40-50 ℃, the air is introduced at a rate of about 3-4 m3Min; and keeping the temperature of the fermented materials at 40-50 ℃ for 10-12 days, and turning and throwing the fermented materials once every 2-3 days to obtain compost rotten clinker.
When the composting is finished, the composting rotten clinker is black brown in color, has black juice and has ammonia odor; the compost is soft and elastic when wet, crisp and easy to break when dry, the organic matter loses elasticity, and the compost volume is reduced by about 2/3 compared with that when just piled.
After composting is completed, measuring and adjusting compost rotten clinker materials to ensure that the content of organic matters in the dried materials is not less than 35%, the content of total nutrients is not less than 6.0%, the content of nitrogen is not less than 3.0%, the number of effective viable bacteria is not less than 60.0 hundred million/g, the number of fecal coliform bacteria is not more than 100/g, the death rate of ascarid eggs is not less than 95%, the PH is controlled to be 5.5-8.0, and the content of the total nutrients is the total content of nitrogen, phosphorus and potassium.
And sieving, crushing, granulating and bagging the compost rotten clinker to obtain the organic fertilizer. A granulator is adopted to make the fertilizer into particles with the particle size of 3-5 mm, and the particles are packed into 25kg per bag.
The invention is characterized in that:
(1) the invention is characterized in that the invention provides a method for producing organic fertilizer by straw bed-lying padding and livestock manure combined anaerobic fermentation biogas residue.
(2) According to the invention, the livestock and poultry excrement and straw bed padding are combined for anaerobic fermentation, so that the problem of recycling the excrement in a farm is solved, a large amount of excrement accumulation phenomenon cannot be generated in the farm, the condition of incapability of recycling is avoided, and the environment pollution caused by the livestock and poultry excrement is favorably relieved.
(3) The organic fertilizer is produced by using biogas residues generated by anaerobic fermentation of the combination of the livestock and poultry manure and straw bed padding as raw materials, so that the problem of secondary pollution caused by anaerobic fermentation is solved.
(4) According to the invention, a horizontal spiral discharging sedimentation type centrifuge is adopted to carry out solid-liquid separation on fermentation liquor generated by anaerobic fermentation of the combination of livestock and poultry manure and straw bed padding, and the solid biogas residue obtained after separation is suitable for organic fertilizer production.
(5) The invention carries out staged fermentation and curing on the material, can ensure that the material is fully degraded, ensures that the treated material contains a plurality of probiotics, and can increase the soil fertility and the number of beneficial flora.
(6) By composting the biogas residues and recycling the biogas residues, harmless treatment and resource utilization of the biogas residues are realized, and the recycling rate of wastes is improved; meanwhile, nutrients and moisture of materials can be utilized to coordinate and complement carbon-nitrogen ratio, the fertility of the organic fertilizer obtained after composting is improved, and the decomposition degree is high.
(7) The organic fertilizer produced by the method does not need to add extra substances, and the optimization of the product quality is ensured.
(8) The method is scientific and reasonable, the straw bed padding and the livestock and poultry manure are subjected to combined anaerobic fermentation to produce energy, meanwhile, the biogas residues generated by anaerobic fermentation are used for producing organic fertilizers, the secondary pollution caused by the anaerobic fermentation is solved, and meanwhile, the comprehensive utilization rate of the livestock and poultry manure and the straw is promoted.
The above description is only an embodiment of the present invention, and the design concept of the present invention is not limited thereto, and any insubstantial modifications made by using the design concept should fall within the scope of infringing the protection of the present invention.

Claims (16)

1. The invention provides a method for producing an organic fertilizer by anaerobic fermentation of biogas residues through the combination of straw bed padding and livestock and poultry feces, which solves the problem of secondary pollution caused by the anaerobic fermentation of the straw bed padding and the livestock and poultry feces, solves the problems of environment such as straw burning, accumulation of the livestock and poultry feces and the like, improves the utilization rate of straw and the livestock and poultry feces, and achieves the aim of ecological recycling.
2. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: the raw materials used for anaerobic fermentation are straw bed-lying padding and livestock and poultry feces produced by straws, and the straw bed-lying padding is subjected to primary fermentation in the using process.
3. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: and (3) adopting medium-temperature anaerobic fermentation, controlling the fermentation temperature to be 37 +/-3 ℃, controlling the pH to be 6.5-7.5, and controlling the hydraulic retention time to be 20-40 days.
4. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: the straw bed-lying padding and livestock and poultry manure combined anaerobic fermentation liquor is subjected to solid-liquid separation by adopting a horizontal spiral discharge sedimentation type centrifuge, the separated solid components are used for producing organic fertilizers, and the liquid components are returned to the field after being treated.
5. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: after separation by a horizontal spiral discharge decanter centrifuge, the solid content in the biogas slurry is lower than 1%, and the water content of biogas residues is 60-70%, so that the method can be used for producing organic fertilizers.
6. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: and adjusting the content of carbon and nitrogen in the dehydrated biogas residues to ensure that the mass ratio of carbon to nitrogen in the biogas residues is 25-30: 1, the PH is neutral or weakly alkaline, and the particle size of the material is 10-30 mm.
7. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: the water content of the initially prepared material is 60-70%.
8. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: piling materials into strips for fermentation; the height of the material pile is not more than 80cm, and the width of the bottom of the material pile is about 500-800 cm.
9. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: before the surface temperature of the fermentation material rises to 60-70 ℃, the air is introduced at a speed of about 3-4 m3Min; when the surface temperature of the fermentation material rises to 60-70 ℃, the air introduction speed is about 1-2 m3/min。
10. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: keeping the fermentation temperature at 60-70 ℃ for 15-20 days, and turning and throwing the materials every 2-3 days.
11. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: cooling the fermented material to 40-50 ℃, wherein the air introduction speed is about 4-6 m3Min; when the temperature is reduced to 40-50 ℃, the air is introduced at a rate of about 3-4 m3/min。
12. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: and keeping the temperature of the fermented materials at 40-50 ℃ for 10-12 days, and turning and throwing the fermented materials once every 2-3 days to obtain compost rotten clinker.
13. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: when the composting is finished, the composting rotten clinker is black brown, has black juice and ammonia odor; the compost volume is reduced about 2/3 compared with the compost volume when just piled.
14. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: after composting, the content of organic matters in the dried material is not less than 35%, the content of total nutrients is not less than 6.0%, the content of nitrogen is not less than 3.0%, the number of effective viable bacteria is not less than 60.0 hundred million/g, the number of fecal coliform bacteria is not more than 100/g, the death rate of ascarid eggs is not less than 95%, the PH is controlled to be 5.5-8.0, and the content of the total nutrients is the total amount of nitrogen, phosphorus and potassium.
15. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: and (3) granulating the compost rotten clinker into particles with the particle size of 3-5 mm, and filling into 25kg per bag.
16. The method for producing organic fertilizer by anaerobic fermentation of biogas residue by combining straw bedding and livestock manure as claimed in claim 1, wherein the method comprises the following steps: the organic fertilizer produced by the method does not need to add extra substances, and the optimization of the product quality is ensured.
CN202011289973.3A 2020-11-17 2020-11-17 Method for producing organic fertilizer by straw bed-lying padding and livestock and poultry manure combined anaerobic fermentation biogas residue Withdrawn CN112374949A (en)

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* Cited by examiner, † Cited by third party
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CN113981012A (en) * 2021-12-09 2022-01-28 海安市鸿泰新材料有限公司 Method for co-producing biogas and bio-organic fertilizer by using paper pulp production waste
CN113979794A (en) * 2021-09-26 2022-01-28 内蒙古华蒙科创环保科技工程有限公司 Biogas residue organic fertilizer formula for promoting efficient and rapid growth of tung trees
CN113999062A (en) * 2021-09-26 2022-02-01 内蒙古华蒙科创环保科技工程有限公司 Biogas slurry organic fertilizer formula for promoting efficient and rapid growth of tung trees

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113979794A (en) * 2021-09-26 2022-01-28 内蒙古华蒙科创环保科技工程有限公司 Biogas residue organic fertilizer formula for promoting efficient and rapid growth of tung trees
CN113999062A (en) * 2021-09-26 2022-02-01 内蒙古华蒙科创环保科技工程有限公司 Biogas slurry organic fertilizer formula for promoting efficient and rapid growth of tung trees
CN113981012A (en) * 2021-12-09 2022-01-28 海安市鸿泰新材料有限公司 Method for co-producing biogas and bio-organic fertilizer by using paper pulp production waste
CN113981012B (en) * 2021-12-09 2024-01-26 海安市鸿泰新材料有限公司 Method for co-producing biogas and bio-organic fertilizer by using paper pulp production waste

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