Composting method for promoting livestock and poultry manure aerobic compost decomposition

Abstract

The invention discloses a composting method for promoting livestock and poultry manure aerobic compost decomposition. The composting method is specifically implemented according to the following steps: step 1, preparing a compost additive; step 2, preparing a conditioner; step 3, adding the conditioner prepared in the step 2 into livestock and poultry manure, and uniformly mixing to prepare a compost raw material mixture; and 4, adding the compost additive prepared in the step 1 into the compost raw material mixture treated in the step 3, and fermenting in a compost reactor until the compost is thoroughly decomposed. The problems that in the prior art, nutrient loss is too fast, and the decomposition degree is low are solved.

Description

Technical Field

[0001] The invention belongs to the technical field of organic fertilizers and relates to a composting method for promoting aerobic composting and maturation of livestock and poultry manure. Background Art

[0002] With the continuous improvement of breeding level and the continuous expansion of breeding scale, the discharge of livestock and poultry manure is also increasing, and the treatment and utilization of livestock and poultry manure are facing challenges. Livestock and poultry manure contains rich organic matter and nutrients. Livestock and poultry manure composting technology is usually used to make livestock and poultry manure harmless and resource-based. Livestock and poultry manure is converted into valuable organic fertilizer through microbial fermentation, which has the potential to reduce pollution and improve soil quality.

[0003] In the composting of livestock and poultry manure, under suitable conditions of C / N, temperature, pH value, moisture content, etc., microbial flora is used to achieve oxidative decomposition of organic matter, effectively degrade organic matter, kill pathogenic bacteria and other harmful substances in livestock and poultry manure, and form a stable humus process. However, the degradation process will lead to the loss of a large amount of nutrients such as carbon and nitrogen. Nitrogen loss can reach 16% to 76% of the initial total nitrogen, and carbon loss accounts for about 60% to 70%. In addition, in these metabolic processes, due to the succession laws of microbial communities, microorganisms will form a large amount of cell fragments through a series of processes such as reproduction, aging, and death. The activity of the microorganisms is significantly weakened, which leads to an extension of the fermentation cycle and affects the composting process.

[0004] Mineral additives have attracted much attention due to their wide sources, high yields and long-term effectiveness. Mineral additives have been widely used in aerobic composting to promote organic matter degradation and compost maturity. However, the effect of adding mineral additives alone to improve carbon and nitrogen retention in compost is limited, and the maturity is low, which is not enough to effectively buffer the low pH value in the composting process, affecting the quality of the compost. In addition, the production cost is high, which limits its economic feasibility in large-scale agricultural applications. Summary of the invention

[0005] The purpose of the present invention is to provide a composting method for promoting aerobic composting and maturation of livestock and poultry manure, thereby solving the problems of too fast nutrient loss and low maturity in the prior art.

[0006] The technical solution adopted by the present invention is a composting method for promoting aerobic composting and maturation of livestock and poultry manure, which is specifically implemented according to the following steps: Step 1, preparing a compost additive; Step 2, preparing a conditioning agent; Step 3, adding the conditioning agent prepared in step 2 to livestock and poultry manure, mixing evenly, to prepare a compost raw material mixture; Step 4, adding the compost additive prepared in step 1 to the compost raw material mixture processed in step 3, and then placing it in a compost reactor for fermentation until the compost is mature.

[0007] The present invention is also characterized in that: Step 1 is implemented according to the following steps: Step 1.1, preparing biochar; Step 1.2, weighing biochar and natural zeolite as raw materials for compost additives, and stirring and mixing the biochar and natural zeolite to prepare the compost additive.

[0008] In step 1.1, the organic waste is pyrolyzed at 500°C to 800°C for 2h to 4h, and then air-dried and crushed to form biochar; the biochar particle size is 0.4mm-0.6mm; and corn stalks are used as the organic waste.

[0009] In step 1.2, the zeolite particle size is 2 mm-4 mm and the specific surface area is 500 m 2 ·g -1 -800 m 2 ·g -1 , weigh the biochar and natural zeolite in a weight ratio of 1:0 to 1:1.

[0010] In step 2, the raw material of the conditioning agent is selected from any one of sun-dried and crushed wheat straw, mushroom residue, wood chips, and dead branches and leaves, or a mixture of two or more thereof.

[0011] In step 2, the moisture content of the conditioning agent is 10% to 15%, and the carbon-nitrogen ratio is 48 to 54.

[0012] The livestock and poultry manure in step 3 is air-dried and crushed, with a moisture content of 20% to 50% and a carbon-nitrogen ratio of 10 to 20.

[0013] In step 3, the livestock and poultry manure and the conditioner are compounded according to a carbon-nitrogen ratio of 20:1 to 25:1, and water is used to adjust the moisture content of the compost mixture to 45% to 65%.

[0014] The compost additive prepared in step 1 is added into the compost raw material mixture processed in step 3 at a ratio of 5% to 10%.

[0015] The beneficial effects of the present invention are as follows: the composting method of the present invention promotes the aerobic composting and maturity of livestock and poultry manure, and the biochar and zeolite are used in the aerobic composting of livestock and poultry manure to improve the maturity of the compost while retaining nutrients; a conditioner is used to adjust the carbon-nitrogen ratio of the initial composting raw materials to achieve the purpose of "using waste to treat waste". The present invention not only improves the seed germination index, but also reduces the loss of carbon and nitrogen elements and improves the maturity of the compost; the compost additive composition used in the present invention is low-priced, easy to obtain, and easy to promote and utilize. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a graph showing the GI variation results of the composting method of the present invention for promoting aerobic composting and maturation of livestock and poultry manure; Figure 2 This is a graph showing the change in nitrate nitrogen in the composting method of the present invention for promoting aerobic composting and maturation of livestock and poultry manure; Figure 3 This is a graph showing the change in ammonium nitrogen in the composting method of the present invention for promoting aerobic composting and maturation of livestock and poultry manure; Figure 4 This is a graph showing the change in fulvic acid in the composting method of the present invention for promoting aerobic composting and maturation of livestock and poultry manure; Figure 5 This is a graph showing the change in humic acid in the composting method of the present invention for promoting aerobic composting and maturation of livestock and poultry manure; Figure 6 This is a graph showing the change in the polymerization degree of humus in the composting method of the present invention for promoting aerobic composting and maturation of livestock and poultry manure. DETAILED DESCRIPTION

[0017] Example 1 The composting method of the present invention for promoting aerobic composting and maturation of livestock and poultry manure is specifically implemented according to the following steps: Step 1, preparing a compost additive; Step 2, preparing a conditioning agent; Step 3, adding the conditioning agent prepared in step 2 to livestock and poultry manure, mixing evenly, to prepare a compost raw material mixture; Step 4, adding the compost additive prepared in step 1 to the compost raw material mixture processed in step 3, and then placing it in a compost reactor for fermentation until the compost is mature.

[0018] Example 2 The composting method of the present invention for promoting aerobic composting and maturation of livestock and poultry manure is specifically implemented according to the following steps: Step 1, preparing a compost additive; Step 1.1, preparing biochar; The organic waste is pyrolyzed at 500℃~800℃ for 2h~4h, air-dried and crushed to make biochar; the biochar particle size is 0.4mm-0.6mm; corn straw is used as the organic waste.

[0019] Step 1.2, weighing biochar and natural zeolite as raw materials for compost additives, and stirring and mixing the biochar and natural zeolite to prepare the compost additive.

[0020] The particle size of zeolite is 2mm-4mm, and the specific surface area is 500m 2 ·g -1 -800 m2 ·g -1 , weigh the biochar and natural zeolite in a weight ratio of 1:0 to 1:1.

[0021] Step 2, preparing a conditioning agent; The raw material of the conditioning agent is selected from any one of sun-dried and crushed wheat straw, mushroom residue, wood chips, dead branches and fallen leaves, or a mixture of two or more thereof.

[0022] The moisture content of the conditioner is 10%~15%, and the carbon-nitrogen ratio is 48~54.

[0023] Step 3, adding the conditioning agent prepared in step 2 to livestock and poultry manure, mixing evenly, to prepare a compost raw material mixture; The livestock and poultry manure in step 3 is air-dried and crushed, with a moisture content of 20% to 50% and a carbon-nitrogen ratio of 10 to 20.

[0024] The livestock and poultry manure and the conditioner are compounded in a carbon-nitrogen ratio of 20:1 to 25:1, and the moisture content of the compost mixture is adjusted to 45% to 65% with water.

[0025] Step 4, adding the compost additive prepared in step 1 to the compost raw material mixture processed in step 3 at a ratio of 5% to 10%, and then placing it in a compost reactor for fermentation until the compost is mature.

[0026] Example 3 The composting method of the present invention for promoting aerobic composting and maturation of livestock and poultry manure is specifically implemented according to the following steps: Step 1, preparing a compost additive; Step 1.1, preparing biochar; The organic waste was pyrolyzed at 500°C for 2 hours, air-dried and crushed to make biochar; the biochar particle size was 0.4 mm; corn straw was used as the organic waste.

[0027] Step 1.2, weighing biochar as a compost additive raw material to prepare a compost additive.

[0028] Step 2, preparing a conditioning agent; The raw material of the conditioning agent is a mixture of sun-dried and crushed wheat straw and mushroom residue with a size of 3cm to 6cm. The moisture content of the conditioning agent is 10% and the carbon-nitrogen ratio is 48.

[0029] Step 3, adding the conditioning agent prepared in step 2 to livestock and poultry manure, mixing evenly, to prepare a compost raw material mixture; The livestock and poultry manure in step 3 is air-dried and crushed, with a moisture content of 20% and a carbon-nitrogen ratio of 10.

[0030] The livestock and poultry manure and the conditioner are compounded in a carbon-nitrogen ratio of 20:1, and the moisture content of the compost mixture is adjusted to 45% with water.

[0031] Step 4, adding the compost additive prepared in step 1 to the compost raw material mixture processed in step 3, and then placing it in a compost reactor for fermentation until the compost is mature.

[0032] The composting reactor is made of an EPP insulation box; corresponding circular holes are opened on the box body of the EPP insulation box to ensure ventilation and oxygen supply, a partition is set at the bottom of the box body to separate the air chamber from the pile body, which is also conducive to the discharge of leachate, and an exhaust pipe is set on the top; during the fermentation process, the composting box is kept well ventilated, and the compost is turned and water is added to the composting box to ensure that the moisture content of the compost is maintained at 45%.

[0033] Example 4 The composting method of the present invention for promoting aerobic composting and maturation of livestock and poultry manure is specifically implemented according to the following steps: Step 1, preparing a compost additive; Step 1.1, preparing biochar; The organic waste was pyrolyzed at 800°C for 4 hours, air-dried and crushed to make biochar; the biochar particle size was 0.6 mm; corn straw was used as the organic waste.

[0034] Step 1.2, weighing biochar and natural zeolite as raw materials for compost additives, and stirring and mixing the biochar and natural zeolite to prepare the compost additive.

[0035] The particle size of zeolite is 2 mm and the specific surface area is 500 m 2 ·g -1 , weigh the biochar and natural zeolite in a weight ratio of 1:1.

[0036] Step 2, preparing a conditioning agent; The raw material of the conditioning agent is a mixture of sun-dried and crushed wheat straw, mushroom residue and sawdust.

[0037] The moisture content of the conditioner is 15% and the carbon-nitrogen ratio is 54.

[0038] Step 3, adding the conditioning agent prepared in step 2 to livestock and poultry manure, mixing evenly, to prepare a compost raw material mixture; The livestock and poultry manure in step 3 is air-dried and crushed, with a moisture content of 50% and a carbon-nitrogen ratio of 20.

[0039] The livestock and poultry manure and the conditioner are compounded in a carbon-nitrogen ratio of 25:1, and the moisture content of the compost mixture is adjusted to 65% with water.

[0040] Step 4, adding the compost additive prepared in step 1 to the compost raw material mixture processed in step 3 at a ratio of 5% to 10%, and then placing it in a compost reactor for fermentation until the compost is mature.

[0041] The composting reactor is made of 4 EPP insulation boxes with a length of 56 cm, a width of 37 cm, a height of 38 cm, a wall thickness of 3 cm and an effective volume of 50 L; a 20 mm circular hole is opened on each side of the EPP insulation box to ensure ventilation and oxygen supply, and a partition is set at the bottom of the box to separate the air chamber from the pile body, which is also conducive to the discharge of leachate, and an exhaust pipe is set on the top; during the fermentation process, the compost box is kept well ventilated, and the compost is turned and water is added to the compost box to ensure that the moisture content of the compost is maintained at 65%.

[0042] Example 5 The composting method of the present invention for promoting aerobic composting and maturation of livestock and poultry manure is specifically implemented according to the following steps: Step 1, preparing a compost additive; Step 1.1, preparing biochar; The organic waste was pyrolyzed at 600°C for 3 hours, air-dried and crushed to make biochar; the biochar particle size was 0.5 mm; corn straw was used as the organic waste.

[0043] Step 1.2, weighing biochar and natural zeolite as raw materials for compost additives, and stirring and mixing the biochar and natural zeolite to prepare the compost additive.

[0044] The particle size of zeolite is 3 mm and the specific surface area is 600 m 2 ·g -1 , weigh the biochar and natural zeolite in a weight ratio of 1:1.

[0045] Step 2, preparing a conditioning agent; The raw material of the conditioning agent is sun-dried and crushed wheat straw into small segments of 3cm to 6cm, with a moisture content of 11.38% and a carbon-nitrogen ratio of 50.

[0046] Step 3, adding the conditioning agent prepared in step 2 to the chicken manure, mixing evenly, to prepare a compost raw material mixture; The chicken manure in step 3 is air-dried and crushed, with a moisture content of 20% and a carbon-nitrogen ratio of 10.

[0047] Chicken manure and wheat straw were compounded at a carbon-nitrogen ratio of 23:1, and water was used to adjust the moisture content of the compost mixture to 55%.

[0048] Step 4, adding the compost additive prepared in step 1 to the compost raw material mixture processed in step 3 at a ratio of 10%, and then placing it in a composting reactor for fermentation, using natural ventilation + manual turning method for oxygen supply, after the temperature rises to 55°C, turning the pile once every 2 days, when the temperature drops below 50°C, turning the pile once every 3-5 days, when the temperature drops below 40°C, turning the pile once every 7 days, during which the moisture content of the pile is maintained at 55%, and turning the pile is stopped when it is close to the ambient temperature. The composting cycle is set to 35 days until the compost is mature.

[0049] Example 6 The composting method of the present invention for promoting aerobic composting and maturation of livestock and poultry manure is specifically implemented according to the following steps: Step 1, preparing a compost additive; Step 1.1, preparing biochar; The organic waste was pyrolyzed at 700°C for 4 hours, air-dried and crushed to make biochar; the biochar particle size was 0.6 mm; corn straw was used as the organic waste.

[0050] Step 1.2, weighing biochar and natural zeolite as raw materials for compost additives, and stirring and mixing the biochar and natural zeolite to prepare the compost additive.

[0051] The particle size of zeolite is 24 mm and the specific surface area is 700 m 2 ·g -1 , weigh the biochar and natural zeolite in a weight ratio of 1:1.

[0052] Step 2, preparing a conditioning agent; The raw material of the conditioner is a mixture of sun-dried and crushed wheat straw, mushroom residue, wood chips, and dead branches and leaves with a size of 3cm to 6cm; the moisture content of the conditioner is 11.38%, and the carbon-nitrogen ratio is 42.

[0053] Step 3, adding the conditioning agent prepared in step 2 to the chicken manure, mixing evenly, to prepare a compost raw material mixture; The livestock and poultry manure in step 3 is air-dried and crushed, with a moisture content of 50% and a carbon-nitrogen ratio of 20.

[0054] The livestock and poultry manure and the conditioner are compounded in a carbon-nitrogen ratio of 25:1, and the moisture content of the compost mixture is adjusted to 65% with water.

[0055] Step 4, adding the compost additive prepared in step 1 to the compost raw material mixture processed in step 3 at a ratio of 10%, and then placing it in a composting reactor for fermentation, using natural ventilation + manual turning method for oxygen supply, after the temperature rises to 55°C, turning the pile once every 2 days, when the temperature drops below 50°C, turning the pile once every 3-5 days, when the temperature drops below 40°C, turning the pile once every 7 days, during which the moisture content of the pile is maintained at 65%, and turning the pile is stopped when it is close to the ambient temperature. The composting cycle is set to 35 days until the compost is mature.

[0056] The seed germination index, nitrate nitrogen, ammonium nitrogen, humic acid, fulvic acid and humic-to-fulvic ratio contents after aerobic composting in Examples 3, 4, 5 and 6 were compared.

[0057] like Figure 1 As shown in the figure, the seed germination index (GI) of different treatment groups gradually increased during the composting process. At the end of composting, the GI values ​​of each treatment group were 88.23% (CK), 91.56% (T1), 102.62% (T2), and 125.31% (T3), respectively. Among them, the GI value and GI increase of the biochar + zeolite treatment group were significantly greater than those of the control group, indicating that the addition of biochar or zeolite is beneficial to improving the seed germination index during the composting process, and its effect is shown as T3 (biochar + zeolite) > T2 (zeolite) > T1 (biochar); like Figure 2 As shown in the data, the nitrate-nitrogen contents in different treatment groups showed an upward trend. At the end of composting, the nitrate-nitrogen contents in each treatment group were 288.95 mg / kg (CK), 315.5 mg / kg (T1), 282.1 mg / kg (T2), and 408.45 mg / kg (T3), respectively. Compared with the initial stage of composting, they increased by 15.49% (CK), 31.87% (T1), 12.1% (T2), and 66.04% (T3), respectively. The nitrate-nitrogen content in the T3 treatment group was the highest. The results indicate that the combined addition of 5% biochar and 5% zeolite can significantly promote nitrification and increase the nitrate-nitrogen content in the compost.

[0058] like Figure 3 As shown, at the beginning of composting, the ammonium nitrogen content in each treatment group increased sharply. By the end of composting, the ammonium nitrogen content in each treatment group was 313.75 mg / kg (CK), 302.5 mg / kg (T1), 380 mg / kg (T2), and 410 mg / kg (T3), respectively, and the decline rates were 82.88% (CK), 83.14% (T1), 83.35% (T2), and 83.64% (T3), respectively. After adding biochar or zeolite, the ammonium nitrogen content decreased faster than that in the control group. like Figure 4As shown, the fulvic acid content of each treatment group was at a high level at the beginning of composting, which were 74.7±2.74 g / kg (CK), 75.52±1.78 g / kg (T1), 75.23±2.86 g / kg (T2), and 75.68±1.78 g / kg (T3), respectively. Then it dropped sharply. After the end of composting, the fulvic acid content of each treatment group decreased by 22.31% (CK), 25.47% (T1), 24.97% (T2), and 30.24% (T3), respectively. Among them, the fulvic acid content of the pile with biochar and zeolite added was significantly lower than that of the control group. like Figure 5 As shown in the figure, the humic acid content showed a gradual upward trend. By the end of composting, the humic acid content reached 49.08±2.45 g / kg (CK), 54.08±2.52 g / kg (T1), 50.41±2.52 g / kg (T2), and 57.67±2.88 g / kg (T3), respectively, which were 62.56% (CK), 66.11% (T1), 63.70% (T2), and 68.27% (T3) higher than those in the initial stage of composting. The humic acid content of the biochar + zeolite treatment was significantly higher than that of the control group and the zeolite treatment group. The humic acid ratio of the treatment group showed an overall upward trend during the composting process. By the end of composting, it increased to 0.71 (CK), 0.96 (T1), 0.79 (T2), and 1.08 (T3), respectively. Compared with the control group, the other three groups increased by 35.2% (T1), 11.27% (T2), and 52.11% (T3), respectively.

[0059] The degree of polymerization (DP) of humus, also known as Hufu ratio, is generally considered to be one of the important parameters reflecting the maturity of compost. Figure 6 As shown in the figure, the Hufu ratio of each treatment group showed an overall upward trend during the composting process. The initial values ​​of the Hufu ratio of each treatment group were relatively small, namely 0.24 (CK), 0.25 (T1), 0.23 (T2), and 0.23 (T3). As the composting reaction continued, the Hufu ratio began to gradually increase, and by the end of the composting, it increased to 1.12 (CK), 0.96 (T1), 0.79 (T2), and 1.08 (T3), respectively. This was related to the gradual increase in humic acid content and the gradual decrease in fulvic acid content. During aerobic composting, a large number of new stable HA molecules were gradually synthesized, and at the same time, the simple and unstable FA was mineralized or converted into HA in large quantities, which led to a gradual increase in the Hufu ratio and the continuous strengthening of the humification degree of the pile. Compared with the control group (CK), the other three groups increased by 15.2% (T1), 11.27% (T2), and 22.11% (T3), respectively, indicating that the addition of biochar and zeolite can improve microbial activity, facilitate the formation of humic acid, and thus promote the humification and polymerization of compost.

[0060] The composting method of the present invention promotes aerobic composting and maturity of livestock and poultry manure, which is a feasible, efficient and clean aerobic composting method. Wheat straw with a high carbon-nitrogen ratio is used as an auxiliary material for livestock and poultry manure with a low carbon-nitrogen ratio to adjust the initial carbon-nitrogen ratio, which is beneficial to the composting. It effectively improves the maturity of the compost and reduces the loss of effective nutrients during the composting process. It has the characteristics of low operating cost and large processing capacity, and obtains a better organic fertilizer product. It can increase the effective phosphorus content. The composting reactor isolates the external environment of the compost, optimizes the oxygen distribution of the pile, increases the pile temperature, shortens the composting time, can quickly start the composting process, maintain a high temperature state in the pile, and significantly improves the internal biological mechanism of composting efficiency.

[0061] The present invention discloses a composting method for promoting aerobic composting and maturation of livestock and poultry manure. Aiming at the problems of loss of carbon and nitrogen elements and low degree of maturation during the composting process, and decreased quality of compost products, in order to better realize the resource treatment of livestock and poultry manure and obtain better composting effect, an additive is used during the composting process to achieve the goal of nitrogen conservation and emission reduction. The present invention provides a composting method for promoting aerobic composting and maturation of livestock and poultry manure. Biochar and zeolite are used in combination during the composting process, and the nitrogen conservation and composting-promoting effects of the biochar and zeolite are effectively utilized, so that the contents of nitrate nitrogen and humic acid in the composting process are significantly increased, which meets the requirements of sustainable development.

Claims

1. A composting method for promoting aerobic composting and maturation of livestock and poultry manure, characterized in that: Follow the steps below to implement it: Step 1, preparing a compost additive; Step 2, preparing a conditioning agent; Step 3, adding the conditioning agent prepared in step 2 to livestock and poultry manure, mixing evenly, to prepare a compost raw material mixture; Step 4, adding the compost additive prepared in step 1 to the compost raw material mixture processed in step 3, and then placing it in a compost reactor for fermentation until the compost is mature.

2. The composting method for promoting aerobic composting and maturation of livestock and poultry manure according to claim 1, characterized in that: Step 1 is implemented according to the following steps: Step 1.1, preparing biochar; Step 1.2, weighing biochar and natural zeolite as raw materials for compost additives, and stirring and mixing the biochar and natural zeolite to prepare the compost additive.

3. The composting method for promoting aerobic composting and maturation of livestock and poultry manure according to claim 2, characterized in that: In step 1.1, the organic waste is pyrolyzed at 500°C to 800°C for 2h to 4h, and then air-dried and crushed to form biochar; the biochar particle size is 0.4mm-0.6mm; and corn stalks are used as the organic waste.

4. The composting method for promoting aerobic composting and maturation of livestock and poultry manure according to claim 3, characterized in that: The natural zeolite in step 1.2 has a particle size of 2 mm to 4 mm and a specific surface area of ​​500 m 2 ·g -1 -800 m 2 ·g -1 , weigh the biochar and natural zeolite in a weight ratio of 1:0 to 1:

1.

5. The composting method for promoting aerobic composting and maturation of livestock and poultry manure according to claim 4, characterized in that: In step 2, the raw material of the conditioning agent is selected from any one of sun-dried and crushed wheat straw, mushroom residue, wood chips, and dead branches and leaves, or a mixture of two or more thereof.

6. The composting method for promoting aerobic composting and maturation of livestock and poultry manure according to claim 5, characterized in that: In step 2, the moisture content of the conditioning agent is 10% to 15%, and the carbon-nitrogen ratio is 48 to 54.

7. The composting method for promoting aerobic composting and maturation of livestock and poultry manure according to claim 6, characterized in that: The livestock and poultry manure in step 3 is air-dried and crushed, with a moisture content of 20% to 50% and a carbon-nitrogen ratio of 10 to 20.

8. The composting method for promoting aerobic composting and maturation of livestock and poultry manure according to claim 7, characterized in that: In step 3, the livestock and poultry manure and the conditioner are compounded according to a carbon-nitrogen ratio of 20:1 to 25:1, and water is used to adjust the moisture content of the compost mixture to 45% to 65%.

9. The composting method for promoting aerobic composting and maturation of livestock and poultry manure according to claim 8, characterized in that: The compost additive prepared in step 1 is added into the compost raw material mixture processed in step 3 at a ratio of 5% to 10%.

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