Method for enhancing aerobic composting by combining nanomembrane with biochar

Abstract

The application provides a method for strengthening aerobic composting by combining nanometer membrane and biochar, comprising the following steps: mixing livestock and poultry manure and straw, and adding water and bacterial agents to obtain compost raw materials; mixing the compost raw materials with biochar, and placing the mixture in a compost container to form a pile; covering the pile with a nanometer membrane to perform aerobic composting, and regularly aerating and turning the pile to obtain final compost. The method for strengthening aerobic composting by combining nanometer membrane and biochar is simple and convenient, and has the advantages of fast composting temperature rising speed, long temperature preservation time, short composting cycle and strong product fertilizer effect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composting, in particular to a method for strengthening aerobic composting by combining nano-membrane and biochar. BACKGROUND

[0002] With the high-quality development of China's economy and the pursuit of a better life, people's demand for meat and food has increased. In 2022, the meat output reached 900 million tons, with a growth rate of more than 2.6% in the past two years; the grain output has been about 660 million tons per year on average in the past ten years, and has shown an increasing trend year by year. Therefore, the rapid development of livestock breeding and planting industry will inevitably bring about a large amount of organic waste.

[0003] The resource utilization of agricultural waste is guaranteed by technical mode. Based on the "3R" principle, China has basically formed a comprehensive utilization pattern of agricultural waste such as livestock manure and grain straw - "five materialization". From the aspects of technical cost, treatment capacity, acceptance of farmers, ecological environment, etc., the conversion of agricultural waste resources into fertilizer through composting is currently a more suitable technical mode for rural areas. However, there are still many technical problems to be solved in aerobic composting at the present stage, such as backward equipment, low automation, large land occupation, high deodorization cost, etc. These factors form the main limiting conditions for the resource utilization of livestock manure, restricting the rapid development of the composting industry in China.

[0004] At present, the main aerobic composting processes in China include pile, tank and reactor type composting. Pile composting is divided into strip pile and static ventilation pile according to the ventilation method. The strip pile system is to stack the mixture of straw and manure into a narrow and long pile shape, and maintain ventilation by mechanical turning; the static ventilation pile is to stack the fermentation raw materials into a pile, and ventilate the pile by air blowing machine, ventilation pipe, etc. Pile aerobic fermentation is a typical open aerobic fermentation, which has simple operation method, low investment and low running cost, but low degree of mechanization, no need for special factory building, but large land occupation, affected by weather, almost no collection of odor generated, easy to cause secondary pollution to the surrounding environment. Aerobic composting needs to increase the high-temperature period, shorten the composting period, reduce carbon and nitrogen loss, and realize harmless composting of rural ecological environment and living environment.

[0005] Therefore, there is an urgent need for an aerobic composting method to overcome the problems of slow temperature rise, short temperature preservation time, long composting period, and poor product fertilizer efficiency of traditional composting. SUMMARY

[0006] Therefore, the purpose of the present application is to provide a method for strengthening aerobic composting by combining nano-membrane and biochar, in order to solve the problems mentioned in the background art.

[0007] Based on the above purpose, the application provides a method for strengthening aerobic composting by combining nano-membrane and biochar, comprising: mixing livestock and poultry manure and straw, adding water and bacterial agent to obtain compost raw materials; mixing the compost raw materials with biochar and placing them in a compost container to form a pile; covering the pile with a nano-membrane for aerobic composting, and regularly aerating and turning the pile to obtain final compost.

[0008] Further, the livestock and poultry manure is one or more of pig manure, cow manure, chicken manure and sheep manure, and the straw is one or more of corn straw, rice straw, sorghum straw and wheat straw, and the mass ratio of the livestock and poultry manure to the straw is (1-3):1.

[0009] Further, the mixing of the livestock and poultry manure and the straw further comprises: crushing the straw to 3-5 cm in length.

[0010] Further, the bacterial agent is a composting mature bacterial agent, and the mass percentage of the bacterial agent in the compost raw materials is 0.01%-0.05%, and the water content of the compost raw materials is 55%-65%.

[0011] Further, the biochar is a carbonaceous material formed by carbonization of one or more of wood, coconut shell, bamboo and crop straw, and the mass ratio of the biochar to the compost raw materials is (5-10):100.

[0012] Further, the nano-membrane comprises an outer polyester film and an inner expanded polytetrafluoroethylene film, and the micropore aperture of the nano-membrane is 0.15-0.35 nm.

[0013] Further, the aeration comprises: periodically aerating by using a silent air pump, the aeration cycle of the silent air pump is set to 5 min on and 55 min off, the exhaust capacity of the silent air pump is 3.5 L / min, and the power of the silent air pump is 3.0 W.

[0014] Further, the turning of the pile comprises: spreading the surface layer of the pile, then shaking the middle wet and hot pile and placing it at the bottom periphery of the pile, and then placing the dry and cold pile on the top middle of the pile, and repeating the operation at a certain interval.

[0015] Further, the repeating operation at a certain interval comprises: when the average temperature of the pile is greater than 55℃, the composting is performed every 2 days; when the average temperature of the pile is greater than or equal to 35℃ and less than or equal to 55℃, the composting is performed every 5 days; and when the average temperature of the pile is less than 35℃, the composting is performed every 7 days.

[0016] Further, the interval time repeated operation includes: performing the composting once on the 3rd day, the 5th day, the 7th day, the 9th day, the 14th day, the 21st day and the 28th day of the aerobic composting, respectively.

[0017] As can be seen from the above, the method for strengthening aerobic composting by combining nano-membrane and biochar provided by the application comprises: mixing livestock and poultry manure and straw, and adding water and bacterial agent to obtain compost raw materials; mixing the compost raw materials with biochar, and placing them in a compost container to form a pile; covering the pile with a nano-membrane to perform aerobic composting, and regularly aerating and turning the pile to obtain final compost. During the composting process, the nano-membrane isolates the influence of the external environment on the maturation of the pile, and can increase the temperature of the pile in a short time; at the same time, the nano-membrane blocks the emission of most greenhouse gases, so that the pressure in the pile increases, thereby promoting the uniform distribution of oxygen and enhancing the aerobic effect. The biochar has a large specific surface area and adsorption capacity, can maintain the water content in the pile, and provides attachment sites for microorganisms to strengthen the degradation of organic matter. Tests show that, compared with using the nano-membrane or the biochar alone for aerobic composting, the combination of the nano-membrane and the biochar for aerobic composting can significantly strengthen the composting effect, and the combination of the two can strengthen the effects of prolonging the high-temperature period and increasing the intensity of the composting process; in terms of the composting period, the combination of the nano-membrane and the biochar for aerobic composting can complete the maturation within 28 days, greatly shortening the composting time. During the high-temperature period, the combination can keep the pH value of the pile stable, providing an environment required for the life activities of microorganisms. The method for strengthening aerobic composting by combining nano-membrane and biochar is simple and convenient, has a fast composting temperature rising speed, a long temperature maintaining time, a short maturation period, and a strong product fertilizer effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the application or related art, the following will briefly introduce the drawings needed to be used in the embodiments or related art descriptions. Obviously, the drawings in the following description are only embodiments of the application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0019] Figure 1 FIG. 1 is a flowchart of a method for strengthening aerobic composting by combining nano-membrane and biochar according to an embodiment of the application;

[0020] Figure 2 FIG. 2 is a temperature change curve of aerobic composting according to the embodiment and the comparative example of the application;

[0021] Figure 3 FIG. 3 is a pH value change curve of aerobic composting according to the embodiment and the comparative example of the application. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present disclosure more clear, the present disclosure is further described in detail below in combination with specific embodiments.

[0023] It should be noted that, unless otherwise defined, the technical terms used in the following examples have the same meaning as generally understood by those skilled in the art to which the present application belongs. The test reagents used in the following examples are all conventional biochemical reagents unless otherwise specified; the experimental methods described are all conventional methods unless otherwise specified.

[0024] With the high-quality development of China's economy and the pursuit of a better life, people's demand for meat and food has increased. In 2022, the meat production reached 900 million tons, with a growth rate of more than 2.6% in the past two years; the average annual output of grain in the past ten years was about 660 million tons, showing an increasing trend year by year. Therefore, the rapid development of livestock breeding and planting industry will inevitably bring about a large amount of organic waste. It is estimated that the annual production of livestock manure in China is more than 3.8 billion tons, with a comprehensive utilization rate of less than 70%; the annual production of grain straw is nearly 127.3 million tons, with an unused part of about 20%.

[0025] The resource utilization of agricultural waste is guaranteed by technical mode. Based on the "3R" principle, China has basically formed a comprehensive utilization pattern of agricultural waste such as livestock manure and grain straw - "five materialization". From the aspects of technical cost, treatment capacity, farmers' acceptance, ecological environment, etc., the conversion of agricultural waste resources into fertilizer through composting is a relatively suitable technical mode for rural areas at present. However, there are still many technical problems to be solved in aerobic composting at the present stage in China, such as backward equipment, low automation, large land occupation, high deodorization cost, etc. These factors form the main limiting conditions for the resource utilization of livestock manure, restricting the rapid development of the composting industry in China.

[0026] The main aerobic composting processes in China at present are pile, tank and reactor composting. Pile composting is divided into strip pile and static ventilation pile according to the ventilation mode. Strip pile system is to stack the mixture of straw and manure into a narrow and long pile, and maintain ventilation by mechanical turning; static ventilation pile is to stack the fermentation raw materials into a pile, and ventilate into the pile by air blowing machine, ventilation pipe, etc. Pile aerobic fermentation is a typical open aerobic fermentation, with simple operation method, low investment and running cost, low degree of mechanization, no need for special factory building, but large land occupation, affected by weather, almost no collection of odor produced, easy to cause secondary pollution to the surrounding environment. Under the background of "carbon neutralization and carbon peak", aerobic composting needs to increase the high temperature period, shorten the composting period, reduce carbon and nitrogen loss, and realize harmless composting of rural ecological environment and living environment.

[0027] Therefore, there is an urgent need for an aerobic composting method to overcome the problems of slow temperature rise, short temperature maintenance time, long composting cycle, and poor product fertility of the current traditional composting.

[0028] The technical solutions of the present application will be described in detail below through specific embodiments and in combination with Figures 1 to 3 The technical solutions of the present application will be described in detail below through specific embodiments and in combination with

[0029] In some embodiments of the present application, a method for strengthening aerobic composting by combining nanomembrane and biochar is provided, as shown in Figure 1 The method comprises the following steps:

[0030] S1, mixing livestock and poultry manure and straw, and adding water and bacterial agent to obtain composting raw materials.

[0031] The livestock and poultry manure is one or more of pig manure, cow manure, chicken manure, and sheep manure, for example, a mixture of pig manure and cow manure, etc., and the specific limitation is not made; the straw is one or more of corn straw, rice straw, sorghum straw, and wheat straw, for example, a mixture of corn straw and rice straw, etc., and the specific limitation is not made; the mass ratio of livestock and poultry manure to straw is (1-3):1, for example, 1:1, 2:1, or 3:1, etc., and the specific limitation is not made; the carbon-nitrogen ratio of different types of livestock and poultry manure and straw is adjusted to 25:1; before mixing the livestock and poultry manure and the straw, the straw needs to be crushed to 3-5 cm, for example, 3 cm, 4 cm, or 5 cm, etc., and the specific limitation is not made.

[0032] The bacterial agent is a composting mature bacterial agent, for example, composed of Bacillus subtilis, Bacillus laterosporus, and yeast bacteria; the mass percentage of the bacterial agent to the composting raw materials is 0.01%-0.05%, for example, 0.01%, 0.02%, 0.03%, 0.04%, or 0.05%, etc., and the specific limitation is not made; the water content of the composting raw materials is 55%-65%, for example, 55%, 60%, or 65%, etc., and the specific limitation is not made.

[0033] S2, mixing the composting raw materials with biochar and placing them in a composting container to form a pile.

[0034] The biochar is a carbonaceous material formed by high-temperature and anaerobic carbonization of one or more organic substances such as wood, coconut shell, bamboo, and crop straw; the mass ratio of biochar to composting raw materials is (5-10):100, for example, 5:100, 7:100, or 10:100, etc., and the specific limitation is not made; the composting container is, for example, a composting barrel.

[0035] S3, covering the nanomembrane on the top of the pile for aerobic composting, and regularly aerating and turning the pile to obtain the final compost.

[0036] The nano-membrane comprises an outer layer of polyester film and an inner layer of expanded polytetrafluoroethylene film, and the nano-membrane has a micropore size of 0.15 nm to 0.35 nm, for example, 0.15 nm, 0.2 nm, 0.25 nm, 0.3 nm or 0.35 nm, without limitation.

[0037] The aeration comprises periodic aeration by using a silent air pump, the aeration cycle of the silent air pump is set to 5 min on and 55 min off, the exhaust capacity of the silent air pump is 3.5 L / min, and the power of the silent air pump is 3.0 W.

[0038] The turning over comprises turning over the surface layer of the pile, then shaking the middle wet and hot pile and placing it at the bottom periphery of the pile, and then placing the dry and cold pile in the middle of the top of the pile, and repeating the operation at intervals.

[0039] The repeating operation at intervals comprises: when the average temperature of the pile is greater than 55℃, the composting is performed once every 2 days; when the average temperature of the pile is greater than or equal to 35℃ and less than or equal to 55℃, the composting is performed once every 5 days; when the average temperature of the pile is less than 35℃, the composting is performed once every 7 days; or the repeating operation at intervals comprises: performing the composting once on the 3rd day, the 5th day, the 7th day, the 9th day, the 14th day, the 21st day and the 28th day of the aerobic composting, without limitation.

[0040] During the composting process, the nano-membrane isolates the influence of the external environment on the maturation of the pile, and can increase the temperature of the pile in a short time; at the same time, the nano-membrane blocks the emission of most greenhouse gases, so that the pressure in the pile is increased, thereby promoting the uniform distribution of oxygen and enhancing the aerobic effect. The biochar has a large specific surface area and adsorption capacity, can maintain the water content in the pile, and provides an attachment site for microorganisms to strengthen the degradation of organic matter. Tests show that, compared with the aerobic composting using the nano-membrane or the biochar alone, the aerobic composting using the nano-membrane and the biochar in combination has a significant effect of intensifying the composting, and the combination of the nano-membrane and the biochar has an intensifying effect on prolonging the high-temperature period and increasing the intensity of the composting process; in terms of the composting period, the aerobic composting using the nano-membrane and the biochar in combination can complete the maturation within 28 days, greatly shortening the composting time. During the high-temperature period, the combination can maintain the stability of the pH value of the pile, providing an environment required for the life activities of microorganisms.

[0041] The method for intensifying aerobic composting by using the nano-membrane and the biochar in combination is simple and convenient, has a fast composting temperature rising speed, a long heat preservation time, a short maturation period and a strong product fertilizer effect.

[0042] Comparative Example 1

[0043] An aerobic composting method does not use a nanometer film and does not add biochar, and specifically comprises the following steps:

[0044] Step one: take sheep manure and wheat straw, crush the wheat straw, and the length of the crushed wheat straw is 3-5 cm.

[0045] Step two: mix the sheep manure and wheat straw in a mass ratio of 1.5:1, add moisture and bacterial agents to the mixture, obtain compost raw materials, and then place them in a compost barrel; the water content of the compost raw materials is 60%, and the bacterial agents are purchased from Weifang Yihao Biotechnology Co., Ltd., and the mass percentage of the bacterial agents in the compost raw materials is 0.01%.

[0046] Step three: aerobic composting is performed using a silent air pump for aeration; the power of the silent air pump is 3.0 W, the exhaust volume is 3.5 L / min, the timing switch is adjusted, and the setting is 5 min on and 55 min off.

[0047] Step four: turn the compost once every 3 days, 5 days, 7 days, 9 days, 14 days, 21 days, and 28 days to obtain the final compost.

[0048] Comparative example 2

[0049] An aerobic composting method uses a nanometer film but does not add biochar, and specifically comprises the following steps:

[0050] Step one: take sheep manure and wheat straw, crush the wheat straw, and the length of the crushed wheat straw is 3-5 cm.

[0051] Step two: mix the sheep manure and wheat straw in a mass ratio of 1.5:1, add moisture and bacterial agents to the mixture, obtain compost raw materials, and then place them in a compost barrel; the water content of the compost raw materials is 60%, and the bacterial agents are purchased from Weifang Yihao Biotechnology Co., Ltd., and the mass percentage of the bacterial agents in the compost raw materials is 0.01%.

[0052] Step three: cover the nanometer film on the surface of the compost pile above the compost barrel for aerobic composting; the nanometer film comprises an outer polyester film and an inner expanded polytetrafluoroethylene film, and the pore size of the nanometer film is 0.15-0.35 nm.

[0053] Step four: aerobic composting is performed using a silent air pump for aeration; the power of the silent air pump is 3.0 W, the exhaust volume is 3.5 L / min, the timing switch is adjusted, and the setting is 5 min on and 55 min off.

[0054] Step five: turn the compost once every 3 days, 5 days, 7 days, 9 days, 14 days, 21 days, and 28 days to obtain the final compost.

[0055] Comparative example 3

[0056] An aerobic composting method does not use a nano membrane, but adds biochar, specifically comprising the following steps:

[0057] Step one: take sheep manure and wheat straw, crush the wheat straw, and the crushed length of the wheat straw is 3-5 cm.

[0058] Step two: mix the sheep manure and wheat straw in a mass ratio of 1.5:1, and add moisture and bacteria to the mixture to obtain compost raw materials; the water content of the compost raw materials is 60%, and the bacteria are purchased from Weifang Yihao Biotechnology Co., Ltd., and the mass percentage of the bacteria in the compost raw materials is 0.01%.

[0059] Step three: add biochar to the compost raw materials and mix thoroughly, and then place it in a compost barrel; the biochar is provided by Henan Lizze Environmental Protection Technology Co., Ltd., and the mass ratio of biochar to compost raw materials is 5:100.

[0060] Step four: aerobic composting is performed using a silent air pump for aeration; the power of the silent air pump is 3.0 W, the exhaust volume is 3.5 L / min, the timing switch is adjusted, and the setting is 5 min on and 55 min off.

[0061] Step five: turn over once every 3 days, 5 days, 7 days, 9 days, 14 days, 21 days, and 28 days to obtain the final compost.

[0062] Example 1

[0063] The application provides a method for strengthening aerobic composting by combining nano membranes and biochar, comprising the following steps:

[0064] Step one: take sheep manure and wheat straw, crush the wheat straw, and the crushed length of the wheat straw is 3-5 cm.

[0065] Step two: mix the sheep manure and wheat straw in a mass ratio of 1.5:1, and add moisture and bacteria to the mixture to obtain compost raw materials; the water content of the compost raw materials is 60%, and the bacteria are purchased from Weifang Yihao Biotechnology Co., Ltd., and the mass percentage of the bacteria in the compost raw materials is 0.01%.

[0066] Step three: add biochar to the compost raw materials and mix thoroughly, and then place it in a compost barrel; the biochar is provided by Henan Lizze Environmental Protection Technology Co., Ltd., and the mass ratio of biochar to compost raw materials is 5:100.

[0067] Step four: cover the nano membrane on the surface of the compost barrel to perform aerobic composting, the nano membrane includes an outer polyester film and an inner expanded polytetrafluoroethylene film, and the pore size of the nano membrane is 0.15-0.35 nm.

[0068] Step five: aerobic composting was carried out, and a silent air pump was used for aeration; the power of the silent air pump was 3.0 W, the exhaust capacity was 3.5 L / min, and the timing switch was adjusted to be set to 5 min on and 55 min off.

[0069] Step six: final composting was obtained by turning over the composting material once at the 3rd day, the 5th day, the 7th day, the 9th day, the 14th day, the 21st day and the 28th day.

[0070] Performance detection:

[0071] The composting was carried out according to the methods in Comparative Example 1, Comparative Example 2, Comparative Example 3 and Example 1 respectively, the temperature and the change data of the pH value in the composting process were detected, and the test results are shown in Figs. Figure 2 and Figure 3 As can be seen from the figures, compared with Comparative Example 1, Comparative Example 2, Comparative Example 3 and Example 1 can improve the temperature of the composting material in a short time and prolong the duration of the high temperature period; Example 1 can improve the pH value of the composting material as a whole and can keep the composting material stable in the pH value, which can maintain the environment required for the life activities of microorganisms.

[0072] The seed germination rate of the composting at different periods in Comparative Example 1, Comparative Example 2, Comparative Example 3 and Example 1 was detected, and the test is shown in Table 1.

[0073] Table 1 Seed germination rate test table

[0074] Seed germination rate Compost 1 d Compost 3 d Compost 5 d Compost 7 d Compost 9 d Compost 14 d Compost 21 d Compost 28 d Comparative Example 1 8.03％ 13.3％ 22.62％ 31.53％ 42.13％ 56.28％ 60.36％ 76.57％ Comparative Example 2 8.58％ 15.33％ 31.81％ 35.99％ 45.42％ 58.98％ 62.47％ 80.09％ Comparative Example 3 9.34％ 16.75％ 24.09％ 42.23％ 53.43％ 63.13％ 67.56％ 82.6％ Example 1 12.02％ 21.73％ 37.89％ 46.74％ 61.32％ 65.95％ 75.15％ 94.35％

[0075] As can be seen from Table 1, at the 9th day, the seed germination rate (GI value) of Comparative Example 3 and Example 1 exceeds 50%, reaching the basic composting; while Comparative Example 1 and Comparative Example 2 exceed 50% for the first time at the 14th day, which shows that the addition of biochar helps to accelerate the composting process (P<0.05); when the composting is carried out to the 28th day, there is a significant difference between Comparative Example 1 and Example 1 (P<0.01), which shows that the combination of nano-membrane and biochar can strengthen the aerobic composting, and the effect of Example 1 is better than that of the superposition of Comparative Example 2 and Comparative Example 3, which shows that the addition of biochar and the covering of nano-membrane have a synergistic effect in strengthening the composting effect.

[0076] The composting was carried out according to the methods in Comparative Example 1, Comparative Example 2, Comparative Example 3 and Example 1, and the data of total organic carbon (DOC) and total phosphorus (TP) in the composting process were detected, and the test results are shown in Table 2.

[0077] Table 2 Total potassium and total phosphorus test table

[0078]

[0079] As can be seen from Table 2, the DOC content of the compost after treatment by each method is reduced by 14.08%, 19.76%, 18.53%, and 22.16% respectively compared with the DOC content at the beginning of composting, indicating that covering the nano-membrane and adding biochar both have an effect on the organic carbon content, and the combined use of the two has a greater effect on the reduction of the total organic carbon content. At the end of composting, the TP content of the compost after treatment by each method is increased by 12.05%, 39.00%, 33.73%, and 42.45% respectively compared with the TP content at the beginning of composting, and the growth rate of Example 1 is 3.52 times that of Comparative Example 1.

[0080] The adopted nano-membrane can block most of the water vapor and greenhouse gases such as carbon dioxide, methane, and nitrous oxide due to the pore size of the inner layer membrane being between 0.15 nm and 0.35 nm, while the outer layer membrane has the characteristics of preventing ultraviolet rays, corrosion resistance, high hydrophobicity, and tensile resistance, which can reduce the influence of external environment such as acid rain on the membrane material. In the composting process, the nano-membrane isolates the influence of the external environment on the composting of the pile, which can increase the temperature of the pile in a short time; at the same time, the blocking of most of the greenhouse gas emissions increases the pressure in the pile, which in turn promotes the uniform distribution of oxygen and enhances the aerobic effect. The adopted biochar has a large specific surface area and adsorption capacity, which can maintain the water content in the pile and provide attachment sites for microorganisms to strengthen the degradation of organic matter. The combined use of nano-membrane and biochar for aerobic composting can Figure 2 It can be seen that the combined use of nano-membrane and biochar is significantly higher than other comparative examples from the 10th day to the 13th day, indicating that the combined use of the two has a reinforcing effect on prolonging the high-temperature period and improving the intensity of the composting process; in terms of the composting period, the combined use of nano-membrane and biochar for aerobic composting can complete the composting in 28 days, greatly shortening the composting time. Figure 3 It can be seen that during the high-temperature period, the combined use can keep the pH value of the pile stable, which provides the environment required for the life activities of microorganisms.

[0081] Each embodiment in the present application is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between each embodiment can be referred to each other.

[0082] The description in the present application is given for example and description, and is not exhaustive or limits the present application to the disclosed form. Many modifications and changes are obvious to those skilled in the art. The selection and description of embodiments are to better illustrate the principles and practical application of the present application, and to enable those skilled in the art to understand the present application to design various embodiments with various modifications suitable for specific purposes.

[0083] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and not intended to limit the scope of the application (including the claims) in any way. In fact, various modifications, substitutions, and alterations to the embodiments described herein can be made by those skilled in the art without departing from the spirit and scope of the application. For example, although the steps of the methods described herein are presented in a particular order, the steps can be performed in any order.

[0084] Although the application has been described in conjunction with specific embodiments thereof, numerous alternatives, modifications, and variations will be readily apparent to those skilled in the art.

[0085] Embodiments of the application are intended to embrace all such alternatives, modifications, and variations that fall within the scope of the appended claims. Accordingly, any one or more features of any embodiment of the application can be combined with any one or more features of any other embodiment of the application, or any application claims, to create an additional embodiment within the scope of and falling under the claims.

Claims

1. A method for enhancing aerobic composting by combining nanofilm and biochar, characterized in that: include: Crushing straw to 3 cm to 5 cm, mixing livestock and poultry manure and the straw, and adding water and a microbial agent to obtain a compost raw material, wherein the livestock and poultry manure is one or more of pig manure, cow manure, chicken manure, and sheep manure, and the straw is one or more of corn straw, rice straw, sorghum straw, and wheat straw, the mass ratio of the livestock and poultry manure to the straw is 1.5:1, the microbial agent is a composting mature microbial agent, the mass percentage of the microbial agent to the compost raw material is 0.01%, and the moisture content of the compost raw material is 60%; The compost raw material is mixed with biochar, and the mixture is placed in a compost container to form a pile, wherein the biochar is a carbonaceous material formed by carbonizing one or more substances selected from wood, coconut shells, bamboo, and crop straw, and the mass ratio of the biochar to the compost raw material is 5:100; A nano-membrane is covered on the pile body for aerobic composting, and aeration and turning are performed regularly to obtain final compost, wherein the nano-membrane includes an outer polyester film and an inner expanded polytetrafluoroethylene film, and the pore size of the nano-membrane is 0.15nm-0.35nm; the aeration includes: periodic aeration using a silent air pump, the aeration cycle of the silent air pump is set to 5 minutes on and 55 minutes off, the exhaust volume of the silent air pump is 3.5 L / min, and the power of the silent air pump is 3.0W; the turning includes: separating the surface pile of the pile body, then shaking out the hot and humid pile in the middle and placing it around the bottom layer of the pile body, and then placing the dry and cold pile body in the middle of the top of the pile body, and repeating the operation at regular intervals; the composting is performed once on the 3rd day, 5th day, 7th day, 9th day, 14th day, 21st day, and 28th day of the aerobic composting.

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