Biogas residue-peat composite substrate and preparation method thereof

Abstract

The invention discloses a biogas residue-peat composite substrate and a preparation method thereof, the biogas residue-peat composite substrate comprises the following components in percentage by weight: 20-30% of a nutrient component, the nutrient component is composed of 40-50% of biogas residue, 25-30% of white peat and 25-30% of black peat; and 70-80% of other additives. The biogas residues, the white peat and the black peat are subjected to compound fermentation to serve as a part for providing the fertilizer, and nutrient substances of the fertilizer are balanced; the vermiculite and the rice husks are matched, so that the air permeability and the water permeability are good, and the water retention capacity is high. The white peat provides cellulose, the black peat contributes humus, and balanced nutrition is released after the white peat, the black peat and the biogas residues are subjected to compound fermentation; vermiculite and rice husks synergistically optimize the pore structure, and the compaction problem of a traditional substrate is avoided. The vinasse biogas residues or livestock and poultry manure biogas residues can be well consumed, a subsequent treatment means is provided for various biogas residues, and resource utilization of the biogas residues is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of biogas residue substrates, and in particular to a biogas residue-peat composite substrate and a preparation method thereof. Background Art

[0002] The use of biogas residue as a substrate for plants fundamentally alters its utilization, shifting its primary toxicity to plants and increasing its complexity. Typically, biogas residue resource utilization is low, with utilization rates typically below 50%. Because large amounts of biogas residue are added as a substrate, plant roots are exposed to large amounts of the substrate, significantly altering the substrate's physical and chemical properties. Biogas residue is high in nutrients and salt (e.g., excessive salt content: EC values are generally >3.0 mS / cm). Excessive nutrients can cause seedling burn, inhibit root development, and disrupt the plant's osmotic regulation system and photosynthesis. The harmful effects of salt stress on crops are primarily caused by high concentrations of salt ions, including direct ion toxicity and indirect osmotic stress, ion imbalance, and nutrient deficiencies. Low porosity (total porosity of conventional substrates <60%) is particularly toxic to plants. The toxicity of biogas residue to plants is primarily due to the fact that its density affects its air permeability, water permeability, and water retention. Excessive substrate density reduces porosity and permeability, impairing gas exchange. This poor gas exchange leads to poor plant growth and even causes hypoxia and necrosis of plant tissues. Summary of the Invention

[0003] The purpose of the present invention is to provide a biogas residue-peat composite matrix and a preparation method to solve the problems in the prior art that biogas residue is not compatible with plants when used as a plant matrix, such as excessive nutrition, poor air permeability, and weak water permeability and water retention capacity.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: The present invention provides a biogas residue-peat composite matrix and a preparation method thereof, comprising the following components in weight percentage: 20-30% of a nutrient component, wherein the nutrient component consists of 40-50% of biogas residue, 25-30% of white peat, and 20-30% of black peat; and 70-80% of other additives.

[0005] Furthermore, the other additives include 70-80% vermiculite, 15-30% rice husks, and 3-5% fungicide.

[0006] Furthermore, white peat (pH 5.5-6.5, organic matter content ≥60%) is rich in cellulose and hemicellulose, which can absorb ammonium nitrogen (NH4⁺-N) in sludge and reduce the initial salinity of the matrix (conductivity ≤2.0dS / m); black peat (humic acid content ≥30%) has a high degree of decomposition and slowly releases phosphorus and potassium elements (available phosphorus ≥0.8%, fast-acting potassium ≥150mg / kg), avoiding sudden nutrient release; sludge (moisture content ≤60%) provides fast-acting nitrogen (total nitrogen ≥2.5%). After the three are compounded at 40-50%:25-30%:20-30%, the total nutrients (N+P2O5+K2O) are controlled at 5-8%, achieving balanced supply.

[0007] Furthermore, when vermiculite (particle size 2-5mm) accounts for 70-80%, the matrix porosity reaches 70-75% (10-12% aeration pores, 60-62% water-holding pores), which not only ensures root respiration but also reduces water loss; rice husks (particle size 1-3mm) fill large pores (accounting for 15-30%) to prevent the matrix from becoming compacted, and release humic acid during the degradation process (improving soil fertility).

[0008] In the present invention, biogas residue, white peat and black peat are fermented together as a part of providing fertilizer, so that the fertilizer effect can be better released and energy can be supplied to plants in a timely and efficient manner.

[0009] White peat is rich in cellulose and hemicellulose, and has a high organic matter content. Black peat, on the other hand, contains more humus, a higher degree of decomposition, and contains more organic acids and minerals. Biogas residue is rich in organic matter and elements such as nitrogen, phosphorus, and potassium. The combination of these three elements results in a more effective fertilizer, preventing excessive nutrient intake that can cause seedling burn, inhibit root development, or disrupt the plant's osmotic regulation system and photosynthesis.

[0010] The white peat of the present invention is rich in cellulose and hemicellulose (as a cellulose skeleton): it can provide a certain physical support structure, the particle size is controlled at 2-5mm, and the permeability of the matrix is enhanced; Black peat (humic acid reservoir): releases organic acids to adjust pH, humic acid content ≥40%, reducing salt stress on plants; Biogas residue (nutrient source): Pretreatment breaks down the lignin coating, releasing nitrogen, phosphorus and potassium while controlling the salt release rate.

[0011] The binary structure of white peat and black peat forms a dual-functional layer of "physical support-chemical regulation", and the sludge serves as a dynamic nutrient source to achieve the triple functional synergy of the matrix "permeability-protection-maintenance".

[0012] Vermiculite provides support for the entire matrix, and the addition of rice husks fills excessive gaps. The combination of vermiculite and rice husks can ensure that the plant roots have the gaps they need while also preventing water from being lost. In addition, rice husks will gradually be consumed during plant growth and provide nutrients to the plants. After the rice husks are consumed, the plant roots have reached the growth conditions and will not collapse at this time.

[0013] The disinfectant is a common disinfectant on the market, and the presence of a small amount ensures that it is not invaded by pathogens in the early stage.

[0014] Specifically, the mass ratio of vermiculite to rice husk is (70-80):(15-30), and the total porosity of the matrix is ≥70% and the water-retention porosity is ≥55% through pore gradient construction. For example, in Example 1, the total porosity is 75%, of which 11% is air-permeable pores and 60% is water-retention pores, which is more than 25% higher than that of traditional matrices.

[0015] The present invention also provides a method for preparing a biogas residue-peat composite matrix, comprising the following steps: S1. Sieve white peat and black peat to remove large particles of impurities, and adjust the humidity to 40%-60% by drying or spraying; S2, according to the proportion of biogas residue, white peat, black peat were stirred and mixed to obtain a mixture, the mixture was sent to an aerobic device for ultrahigh temperature fermentation, the mixture was turned over every 3-5 days, and the fermentation period was 20-30 days; S3. The fermented mixture is mixed evenly with other additives in proportion to obtain a composite matrix.

[0016] Furthermore, the biogas residue comes from one or both of wine lees biogas residue and livestock and poultry manure biogas residue.

[0017] Furthermore, the wine lees and biogas residue is subjected to the following treatment: the wine lees and biogas residue is dried and dehydrated to a moisture content of 50-60%, and then fermented with white peat and black peat.

[0018] Furthermore, the livestock and poultry manure biogas residue is subjected to the following treatment: the biogas residue after anaerobic fermentation of the livestock and poultry manure is subjected to solid-liquid separation to obtain biogas residue with a moisture content of 65-70%, which is subsequently fermented with white peat and black peat.

[0019] Furthermore, the aerobic device is a drum-type aerobic fermentation device, which is appropriately rolled every 3-5 days to turn over the materials in the device.

[0020] Furthermore, the fermentation conditions are 80-120°C, rapidly rising to above 70°C within 48 hours, and continuing for ≥24 hours to decompose macromolecular organic matter; the air volume is 0.10-0.25Nm³ / min·m³, and the oxygen concentration of the pile is maintained at 8–12%.

[0021] Under high-temperature fermentation, water evaporates quickly, the high temperature lasts for a long time, and the temperature of each fermentation cycle exceeds 80 degrees, which quickly kills pathogens, viruses, and insect eggs; the degradation efficiency of harmful organic matter (antibiotics, etc.) is high; moisture content: the moisture content of the fermentation product is as low as below 35%; it has the following advantages: Efficient removal of typical toxic and harmful substances The degradation and removal characteristics of typical organic pollutants in municipal sludge and livestock and poultry manure were studied. The removal efficiency of several major classes of typical antibiotics, including sulfonamides, fluoroquinolones, tetracyclines, and macrolides, was significantly improved, with removal rates exceeding 99%.

[0022] Highly efficient features for heavy metal stabilization Under high-temperature fermentation conditions, heavy metal salts are converted into an oxidized state and a residual state, which is a difficult-to-migrate state. The proportion of these two stable forms increases as the fermentation is completed.

[0023] High decomposition and conversion efficiency The organic components are completely decomposed, and there will be no secondary fermentation and burning of crops after application.

[0024] In the present invention, the white peat, black peat and biogas residue all retain a certain amount of moisture. The presence of moisture can reduce the loss of fertilizer efficiency of the matrix during transportation, and the moisture is evaporated preferentially when the temperature is too high.

[0025] Based on the above technical solution, the embodiments of the present invention can produce at least the following technical effects: (1) The present invention does not require the addition of antibiotics or pesticides, thus reducing production costs, reducing pollution, optimizing the matrix ecological environment, achieving the microecological balance of the matrix, and having the functions of dissolving nitrogen, phosphorus, and potassium.

[0026] (2) The present invention uses the composite fermentation of biogas residue, white peat and black peat as the fertilizer, and its nutrients are balanced. The biogas residue-white peat-black peat ternary system stabilizes the N / P / K ratio at 15:3:12, which reduces the nitrogen concentration by 40% compared with single biogas residue; the pore structure is optimized: the vermiculite-rice husk compound makes the matrix air pore reach 11-12%, which is more than 50% higher than the traditional matrix. The combination of vermiculite and rice husk makes the permeability and water permeability good, and has a strong water retention capacity.

[0027] (3) The biogas residue-peat composite matrix and preparation method provided by the present invention have resource utilization benefits: each ton of matrix can absorb 200-300 kg of biogas residue, reducing carbon emissions by 35% compared with traditional composting methods. It can effectively consume wine lees biogas residue or livestock and poultry manure biogas residue, providing a subsequent treatment method for various biogas residues, and realizing resource utilization of biogas residues.

[0028] (4) The biogas residue-peat composite matrix and preparation method provided by the present invention utilize ultra-high temperature fermentation to significantly improve the removal efficiency of several major types of typical antibiotics such as sulfonamides, fluoroquinolones, tetracyclines, and macrolides in livestock and poultry manure biogas residues, with a removal rate exceeding 99%. In addition, heavy metal salts are converted into an oxidized state and a residual state into a difficult-to-migrate state, thereby preventing heavy metal ions from being released into the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0030] Figure 1 It is a process flow chart of an embodiment of the present invention. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as limiting the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0032] It should be understood that the terms described herein are intended only to describe particular embodiments and are not intended to limit the present invention. In addition, for numerical ranges herein, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Each smaller range between any intermediate value within a stated value or stated range and any other stated value or intermediate value within the stated range is also encompassed by the present invention. The upper and lower limits of these smaller ranges may be independently included or excluded within the scope.

[0033] Unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. Although only preferred methods and materials are described herein, any methods and materials similar or equivalent to those described herein may also be used in the practice or testing of the present invention. All documents mentioned in this specification are incorporated by reference to disclose and describe the methods and / or materials associated with the documents. In the event of any conflict with any incorporated document, the contents of this specification shall prevail.

[0034] It will be apparent to those skilled in the art that various modifications and variations may be made to the specific embodiments described herein without departing from the scope or spirit of the invention. Other embodiments will be apparent to those skilled in the art from the description of the invention. The description and examples are intended to be exemplary only.

[0035] The words “include,” “including,” “have,” “contain,” etc. used in this document are open-ended terms, meaning including but not limited to.

[0036] like Figure 1 As shown, a biogas residue-peat composite matrix and preparation method: The invention comprises the following components in weight percentage: 20-30% of nutrient components, wherein the nutrient components are composed of 40-50% of biogas residue, 25-30% of white peat and 20-30% of black peat; and 70-80% of other additives; wherein the other additives include 70-80% of vermiculite, 15-30% of rice husk and 3-5% of fungicide.

[0037] S1. Sieve white peat and black peat to remove large particles of impurities, and adjust the humidity to 40%-60% by drying or spraying; S2. Stir and mix the biogas residue, white peat, and black peat in proportion to obtain a mixed material, and send the mixed material into an aerobic device for fermentation. The fermentation conditions are 70-75°C, and the temperature is rapidly raised to above 70°C within 48 hours, and the fermentation is continued for ≥24 hours to decompose macromolecular organic matter; the air volume is 0.10-0.25Nm³ / min·m³, the oxygen concentration of the pile is maintained at 8-12%, and the mixed material is turned every 3-5 days. The fermentation cycle is 20-30 days; S3. The fermented mixture is mixed evenly with other additives in proportion to obtain a composite matrix. Example 1 Nutritional components 20%: distiller's grains biogas residue + livestock and poultry manure biogas residue 50%, white peat 30%, black peat 20% Other additives 80%: Vermiculite 80%, Rice husk 17%, Bactericide 3% Example 2 Nutritional components 20%: 50% distiller's grains, 30% white peat, 20% black peat Other additives 80%: Vermiculite 80%, Rice husk 17%, Bactericide 3% Example 3 Nutritional components 20%: livestock and poultry manure sludge 50%, white peat 30%, black peat 20% Other additives 80%: Vermiculite 80%, Rice husk 17%, Bactericide 3% Example 4 Nutritional components 20%: livestock and poultry manure sludge 40%, white peat 30%, black peat 30% Other additives 80%: Vermiculite 80%, Rice husk 17%, Bactericide 3% Example 5 Nutritional components 20%: livestock and poultry manure sludge 45%, white peat 30%, black peat 25% Other additives 80%: Vermiculite 80%, Rice husk 17%, Bactericide 3% Example 6 Nutritional components 30%: livestock and poultry manure sludge 50%, white peat 30%, black peat 20% Other additives 70%: Vermiculite 80%, Rice husk 17%, Bactericide 3% Example 7 Nutritional components 30%: livestock and poultry manure sludge 50%, white peat 30%, black peat 20% Other additives 70%: Vermiculite 70%, Rice husk 25%, Bactericide 5% Example 8 Nutritional components 30%: livestock and poultry manure sludge 50%, white peat 30%, black peat 20% Other additives 70%: Vermiculite 75%, Rice husk 22%, Bactericide 3% Example 9 Nutritional components 25%: livestock and poultry manure sludge 50%, white peat 30%, black peat 20% Other additives 75%: Vermiculite 80%, Rice husk 17%, Bactericide 3% Example 1 S1. Sieve white peat and black peat to remove large particles of impurities, and adjust the humidity to 40%-60% by drying or spraying; S2. Dehydrate the mixture of distiller's grains and livestock manure to a moisture content of 60-70%, crush and sieve to obtain sludge and biogas residue powder; Mix distiller's grains and biogas residue, livestock and poultry manure, white peat, and black peat in proportion to obtain a mixed material. The mixed material is then fed into an aerobic device for fermentation. The fermentation temperature is set at 70-75°C, rapidly raised to above 70°C within 48 hours, and continued for 24 hours or longer to decompose macromolecular organic matter. The air volume is 0.10-0.25 Nm³ / min·m³, and the oxygen concentration in the pile is maintained at 8-12%. The mixed material is turned every 3-5 days, and the fermentation cycle is 20-30 days. S3. The fermented mixture is mixed evenly with other additives in proportion to obtain a composite matrix.

[0038] Example 2 S1. Sieve white peat and black peat to remove large particles of impurities, and adjust the humidity to 40%-60% by drying or spraying; S2. Drying and dehydrating the distiller's grains and biogas residue to a moisture content of 50-60%, stirring and evenly mixing the distiller's grains and biogas residue, white peat, and black peat in proportion to obtain a mixed material, and sending the mixed material into an aerobic device for fermentation. The fermentation conditions are 70-75°C, rapidly raising the temperature to above 70°C within 48 hours, and continuing for ≥24 hours to decompose macromolecular organic matter; the air volume is 0.10-0.25 Nm³ / min·m³, the oxygen concentration in the pile is maintained at 8-12%, and the mixed material is turned every 3-5 days. The fermentation cycle is 20-30 days; S3. The fermented mixture is mixed evenly with other additives in proportion to obtain a composite matrix.

[0039] Example 3 S1. Sieve white peat and black peat to remove large particles of impurities, and adjust the humidity to 40%-60% by drying or spraying; S2. The biogas residue after anaerobic fermentation of livestock and poultry manure is subjected to solid-liquid separation to obtain biogas residue with a moisture content of 65-70%. The livestock and poultry manure biogas residue, white peat, and black peat are stirred and evenly mixed in proportion to obtain a mixed material. The fermentation conditions are 70-75°C, and the temperature is rapidly raised to above 70°C within 48 hours, and the temperature is continuously increased for ≥24 hours to decompose macromolecular organic matter. The air volume is 0.10-0.25 Nm³ / min·m³, and the oxygen concentration in the pile is maintained at 8-12%. The mixed material is sent to an aerobic device for fermentation. The mixed material is turned every 3-5 days, and the fermentation cycle is 20-30 days. S3. The fermented mixture is mixed evenly with other additives in proportion to obtain a composite matrix.

[0040] Example 4 S1. Sieve white peat and black peat to remove large particles of impurities, and adjust the humidity to 40%-60% by drying or spraying; S2. The biogas residue after anaerobic fermentation of livestock and poultry manure is subjected to solid-liquid separation to obtain biogas residue with a moisture content of 65-70%. The livestock and poultry manure biogas residue, white peat, and black peat are stirred and evenly mixed in proportion to obtain a mixture. The mixture is fed into an aerobic device for fermentation. The fermentation conditions are 70-75°C, and the temperature is rapidly raised to above 70°C within 48 hours, and the fermentation is continued for ≥24 hours to decompose macromolecular organic matter. The air volume is 0.10-0.25 Nm³ / min·m³, the oxygen concentration in the pile is maintained at 8-12%, and the mixture is turned every 3-5 days. The fermentation cycle is 20-30 days. S3. The fermented mixture is mixed evenly with other additives in proportion to obtain a composite matrix.

[0041] Example 5 S1. Sieve white peat and black peat to remove large particles of impurities, and adjust the humidity to 40%-60% by drying or spraying; S2. The biogas residue after anaerobic fermentation of livestock and poultry manure is subjected to solid-liquid separation to obtain biogas residue with a moisture content of 65-70%. The livestock and poultry manure biogas residue, white peat, and black peat are stirred and evenly mixed in proportion to obtain a mixture. The mixture is fed into an aerobic device for fermentation. The fermentation conditions are 70-75°C, and the temperature is rapidly raised to above 70°C within 48 hours, and the fermentation is continued for ≥24 hours to decompose macromolecular organic matter. The air volume is 0.10-0.25 Nm³ / min·m³, the oxygen concentration in the pile is maintained at 8-12%, and the mixture is turned every 3-5 days. The fermentation cycle is 20-30 days. S3. The fermented mixture is mixed evenly with other additives in proportion to obtain a composite matrix.

[0042] Example 6 S1. Sieve white peat and black peat to remove large particles of impurities, and adjust the humidity to 40%-60% by drying or spraying; S2. The biogas residue after anaerobic fermentation of livestock and poultry manure is subjected to solid-liquid separation to obtain biogas residue with a moisture content of 65-70%. The livestock and poultry manure biogas residue, white peat, and black peat are stirred and evenly mixed in proportion to obtain a mixture. The mixture is fed into an aerobic device for fermentation. The fermentation conditions are 70-75°C, and the temperature is rapidly raised to above 70°C within 48 hours, and the fermentation is continued for ≥24 hours to decompose macromolecular organic matter. The air volume is 0.10-0.25 Nm³ / min·m³, the oxygen concentration in the pile is maintained at 8-12%, and the mixture is turned every 3-5 days. The fermentation cycle is 20-30 days. S3. The fermented mixture is mixed evenly with other additives in proportion to obtain a composite matrix.

[0043] Example 7 S1. Sieve white peat and black peat to remove large particles of impurities, and adjust the humidity to 40%-60% by drying or spraying; S2. The biogas residue after anaerobic fermentation of livestock and poultry manure is subjected to solid-liquid separation to obtain biogas residue with a moisture content of 65-70%. The livestock and poultry manure biogas residue, white peat, and black peat are stirred and evenly mixed in proportion to obtain a mixture. The mixture is fed into an aerobic device for fermentation. The fermentation conditions are 70-75°C, and the temperature is rapidly raised to above 70°C within 48 hours, and the fermentation is continued for ≥24 hours to decompose macromolecular organic matter. The air volume is 0.10-0.25 Nm³ / min·m³, the oxygen concentration in the pile is maintained at 8-12%, and the mixture is turned every 3-5 days. The fermentation cycle is 20-30 days. S3. The fermented mixture is mixed evenly with other additives in proportion to obtain a composite matrix.

[0044] Example 8 S1. Sieve white peat and black peat to remove large particles of impurities, and adjust the humidity to 40%-60% by drying or spraying; S2. The biogas residue after anaerobic fermentation of livestock and poultry manure is subjected to solid-liquid separation to obtain biogas residue with a moisture content of 65-70%. The livestock and poultry manure biogas residue, white peat, and black peat are stirred and evenly mixed in proportion to obtain a mixture. The mixture is fed into an aerobic device for fermentation. The fermentation conditions are 70-75°C, and the temperature is rapidly raised to above 70°C within 48 hours, and the fermentation is continued for ≥24 hours to decompose macromolecular organic matter. The air volume is 0.10-0.25 Nm³ / min·m³, the oxygen concentration in the pile is maintained at 8-12%, and the mixture is turned every 3-5 days. The fermentation cycle is 20-30 days. S3. The fermented mixture is mixed evenly with other additives in proportion to obtain a composite matrix.

[0045] Example 9 S1. Sieve white peat and black peat to remove large particles of impurities, and adjust the humidity to 40%-60% by drying or spraying; S2. The biogas residue after anaerobic fermentation of livestock and poultry manure is subjected to solid-liquid separation to obtain biogas residue with a moisture content of 65-70%. The livestock and poultry manure biogas residue, white peat, and black peat are stirred and evenly mixed in proportion to obtain a mixture. The mixture is fed into an aerobic device for fermentation. The fermentation conditions are 70-75°C, and the temperature is rapidly raised to above 70°C within 48 hours, and the fermentation is continued for ≥24 hours to decompose macromolecular organic matter. The air volume is 0.10-0.25 Nm³ / min·m³, the oxygen concentration in the pile is maintained at 8-12%, and the mixture is turned every 3-5 days. The fermentation cycle is 20-30 days. S3. The fermented mixture is mixed evenly with other additives in proportion to obtain a composite matrix.

[0046] Examples 1-9 yielded matrix-related properties: The effects of the substrate on the growth of 20-day-old plant seedlings obtained in Example 1-9 are as follows: The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this field, several variations and improvements can be made without departing from the creative concept of the present invention, which all fall within the scope of protection of the present invention.

Claims

1. A biogas residue-peat composite matrix, characterized in that: The invention comprises the following components in weight percentage: 20-30% of nutrient components, wherein the nutrient components are composed of 40-50% of biogas residue, 25-30% of white peat and 20-30% of black peat; and 70-80% of other additives.

2. The biogas residue-peat composite matrix according to claim 1, characterized in that The other additives include 70-80% vermiculite, 15-30% rice hulls, and 3-5% fungicide.

3. The method for preparing a biogas residue-peat composite matrix according to any one of claims 1 to 2, characterized in that: The following steps are involved: S1. Sieve white peat and black peat to remove large particles of impurities, and adjust the humidity to 40%-60% by drying or spraying; S2, according to the proportion of biogas residue, white peat, black peat were stirred and mixed to obtain a mixture, the mixture was sent to an aerobic device for ultrahigh temperature fermentation, the mixture was turned over every 3-5 days, and the fermentation period was 20-30 days; S3. The fermented mixture is mixed evenly with other additives in proportion to obtain a composite matrix.

4. The method for preparing the biogas residue-peat composite matrix according to claim 3, characterized in that: The biogas residue comes from one or both of wine lees biogas residue and livestock and poultry manure biogas residue.

5. The method for preparing the biogas residue-peat composite matrix according to claim 4, characterized in that: The wine lees and biogas residue are subjected to the following treatment: the wine lees and biogas residue are dried and dehydrated to a moisture content of 50-60%, and then fermented with white peat and black peat.

6. The method for preparing the biogas residue-peat composite matrix according to claim 4, characterized in that: The livestock and poultry manure biogas residue is treated as follows: the biogas residue after anaerobic fermentation of the livestock and poultry manure is subjected to solid-liquid separation to obtain biogas residue with a moisture content of 65-70%, which is subsequently fermented with white peat and black peat.

7. The method for preparing the biogas residue-peat composite matrix according to claim 3, characterized in that: The aerobic device is a drum-type aerobic fermentation device, which is properly rolled every 3-5 days to turn over the materials in the device.

8. The method for preparing the biogas residue-peat composite matrix according to claim 3, characterized in that: The fermentation conditions are 80-120°C, rapidly rising to above 80°C within 48 hours, and continuing for ≥24 hours to decompose large molecular organic matter; the air volume is 0.10-0.25Nm³ / min·m³, and the oxygen concentration of the pile is maintained at 8-12%.

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