Normal-temperature compost rapid decay promoting process and organic fertilizer

Abstract

The invention discloses a normal-temperature compost rapid decay promoting process and an organic fertilizer, and the normal-temperature compost rapid decay promoting process comprises the following steps: screening a compound microbial system compounded with aerobic, micro-aerobic and anaerobic functions by adopting an external elimination screening method; 0.8-1.5 kg of the composite microbial system is added to 1 m < 3 > of the compost raw material for mixed fermentation, and the water content is controlled to be 40-60%; and fermenting for 20-27 days to complete composting and decay promotion. According to the rapid decay promoting technology, regular pile turning is not needed, and the AOC content of the generated organic fertilizer is obviously increased.

Description

Technical Field

[0001] The invention belongs to the technical field of rapid composting and accelerating decomposition, and relates to a normal temperature composting and accelerating decomposition process and an organic fertilizer. Background Art

[0002] There are many ways to process compost such as livestock and poultry manure, including physical methods, chemical methods, microbial fermentation methods, etc. The traditional way to ferment livestock and poultry manure as fertilizer is to let it pile up and ferment naturally for 5-6 months, and it takes about 20 days or a month to use it as feed. This will emit odor, pollute the environment and cause a large amount of nutrient loss. Using microbial fermentation to treat manure can not only speed up the fermentation process, shorten the fermentation time, reduce nitrogen loss, and increase the nutrient content of the fermented product; it can also dehydrate the fermented product through the temperature generated by fermentation, saving energy consumption, reducing costs, and is simple to operate and easy to promote.

[0003] In the related art, the use of existing microbial agents requires regular turning of the compost, which is rather cumbersome, and the AOC content of the produced organic fertilizer is not high. Summary of the invention

[0004] The purpose of the present invention is to provide a rapid decomposition-promoting process for composting at room temperature and an organic fertilizer, which does not require regular compost turning and significantly improves the AOC content of the produced organic fertilizer.

[0005] The technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a rapid decomposition-promoting process for composting at room temperature, comprising the following steps: using an external elimination screening method to screen a composite bacterial system with aerobic, microaerobic and anaerobic functions;

[0007] According to 1m 3 Add 0.8-1.5kg of composite bacteria to the compost raw materials for mixed fermentation, and control the moisture content between 40-60%;

[0008] Composting is completed after 20-27 days of fermentation.

[0009] Furthermore, the composite bacterial system includes one or more of Bacillus subtilis subsp. subtilis, Bacillus lysinicus, Bacillus aeruginosa, Bacillus thermomylovora, Bacillus thermoacidophilus, Acinetobacter baumannii, Bacillus thermourea, Bacillus paleaerobic, and undefined colorless bacillus.

[0010] Furthermore, the composite bacterial system includes Bacillus subtilis subsp. subtilis, Achromobacter and others, and the compounding ratio is 4.5-5:1:0.8-1.2.

[0011] Furthermore, the composite bacterial system includes Bacillus subtilis subsp. subtilis, Bacillus lysine, intestinal core bacteria and others, and the composite ratio is 1:3.6-4.4:1.8-2.2:1.8-2.2.

[0012] Furthermore, when the compost raw material is a liquid raw material, 1m 3 1±0.1kg of composite bacteria system is added to the compost raw materials for mixed fermentation.

[0013] Furthermore, the moisture content is controlled between 50±2%.

[0014] In a second aspect, the present invention provides an organic fertilizer produced by the rapid decomposition-promoting process of room temperature composting as described above, wherein the AOC content of the organic fertilizer is higher than 0.06%.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The microbial composite bacterial system screened by the present invention is based on the composite bacterial system components with consistent structural and functional stability for compost raw materials after the microbial composite bacterial system is subcultured and domesticated. The no-turning compost fermentation is different from the traditional compost fermentation. The traditional compost fermentation is aerobic fermentation, which mainly realizes the intake of dissolved oxygen by turning the compost to complete the aerobic degradation of lignocellulose in the compost body. During the process, a large amount of heat and carbon dioxide are directly dissipated into the air with the turning operation. The no-turning compost fermentation technology is based on the functional realization of the microbial flora at different stages, from the early aerobic, mid-term microaerobic, and late anaerobic fermentation process. After the composite bacterial system and the compost raw materials are mixed, within 24 hours, through the activation and digestion of the flora, the compost body is quickly heated to 60-65°C, and the startup stage and the heating stage of the composting process are completed in a short time. Because the entire compost body is free of turning, after 24 hours, as the temperature of the compost body continues for about 14 days, the cooling period is 7 days, and the compost fermentation is completed. The process eliminates the need for compost turning, slows down the intake of dissolved oxygen, and reduces the output of carbon dioxide. According to the conservation of carbon materials, it has been tested that the carbon dioxide that has not escaped can convert part of the lignocellulose into assimilable carbon AOC after biological transformation. Therefore, the AOC content of this fermentation technology is 2 to 4 times higher than that of traditional composting technology, and the carbonization of NY525-2021 organic fertilizer can be achieved. The room temperature composting rapid decomposition process of the present invention does not require regular compost turning and the AOC content of the produced organic fertilizer is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative work, among which:

[0018] Figure 1 This is a diagram showing the proportion of a composite bacterial system in a rapid decomposition-promoting process for composting at room temperature according to an embodiment of the present invention;

[0019] Figure 2 This is a result inspection table of biogas decomposition and rapid decomposition process decomposition in the examples of the present invention. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0022] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0023] As described in the background technology, there are various processing methods for compost such as livestock and poultry manure, including physical methods, chemical methods, microbial fermentation methods, etc. The traditional old way of fermenting livestock and poultry manure as fertilizer is to let it pile up and ferment naturally for 5-6 months, and it takes about 20 days or a month to use it as feed. This will emit a foul odor, pollute the environment and cause a large amount of nutrient loss. Using microbial fermentation to treat manure can not only speed up the fermentation process, shorten the fermentation time, reduce nitrogen loss, and increase the nutrient content of the fermented product; it can also dehydrate the fermented product through the temperature generated by fermentation, save energy consumption, reduce costs, and is simple to operate and easy to promote. In the related art, the use of existing bacterial agents requires regular turning of the pile, which is relatively cumbersome, and the AOC content of the organic fertilizer produced is not high.

[0024] Based on this, the inventors have created a room temperature composting rapid decomposition process and organic fertilizer of the present application to solve the above technical problems.

[0025] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0026] Example

[0027] In a first aspect, the present invention provides a rapid decomposition-promoting process for composting at room temperature, comprising the following steps.

[0028] S1. Use external elimination screening method to screen composite bacterial systems with aerobic, microaerobic and anaerobic functions. For example, the composite bacterial system may include one or more of Bacillus subtilis subsp. subtilis, Bacillus lysinicola, Bacillus aerobacterium, Bacillus thermoamylovora, Bacillus thermoacidophilus, Acinetobacter baumannii, Bacillus thermoureaphilus, Bacillus pallidus aerobicus, and undefined colorless bacillus. For different compost raw materials, corresponding bacterial species and composite ratios are obtained, such as Figure 1 As shown. Preferably, the composite bacterial system may include Bacillus subtilis subsp. subtilis, Achromobacterium and others, and the composite ratio is 4.5-5:1:0.8-1.2, preferably 4.8:1:1. Optionally, the composite bacterial system may include Bacillus subtilis subsp. subtilis, Bacillus lysine, intestinal core bacteria and others, and the composite ratio is 1:3.6-4.4:1.8-2.2:1.8-2.2, preferably 1:4:2:2. For example, when the compost raw material is a liquid raw material, 1m 3 1±0.1kg of composite bacteria system is added to the compost raw materials for mixed fermentation. It has been verified in practice that the organic fertilizer obtained at this time has a higher AOC content and the fermentation time is also shortened.

[0029] S2, according to 1m 3 0.8-1.5 kg of the composite bacteria system is added to the compost raw material for mixed fermentation, and the moisture content is controlled between 40-60%, preferably, the moisture content is controlled between 50±2%.

[0030] S3. Composting is completed after 20-27 days of fermentation.

[0031] The microbial composite bacterial system screened by the present invention is based on the composite bacterial system components with consistent structural and functional stability for compost raw materials after the microbial composite bacterial system is subcultured and domesticated. The no-turning compost fermentation is different from the traditional compost fermentation. The traditional compost fermentation is aerobic fermentation, which mainly realizes the intake of dissolved oxygen by turning the compost to complete the aerobic degradation of lignocellulose in the compost body. During the process, a large amount of heat and carbon dioxide are directly dissipated into the air with the turning operation. The no-turning compost fermentation technology is based on the functional realization of the microbial flora at different stages, from the early aerobic, mid-term microaerobic, and late anaerobic fermentation process. After the composite bacterial system and the compost raw materials are mixed, within 24 hours, through the activation and digestion of the flora, the compost body is quickly heated to 60-65°C, and the startup stage and the heating stage of the composting process are completed in a short time. Because the entire compost body is free of turning, after 24 hours, as the temperature of the compost body continues for about 14 days, the cooling period is 7 days, and the compost fermentation is completed. The process eliminates the need for compost turning, slows down the intake of dissolved oxygen, and reduces the output of carbon dioxide. According to the conservation of carbon materials, it has been tested that the carbon dioxide that has not escaped can convert part of the lignocellulose into assimilable carbon AOC after biological transformation. Therefore, the AOC content of this fermentation technology is 2 to 4 times higher than that of traditional composting technology, and the carbonization of NY525-2021 organic fertilizer can be achieved. The room temperature composting rapid decomposition process of the present invention does not require regular compost turning and the AOC content of the produced organic fertilizer is significantly improved.

[0032] In a second aspect, the present invention provides an organic fertilizer produced by the rapid decomposition-promoting process of room temperature composting as described above, wherein the AOC content of the organic fertilizer is higher than 0.06%.

[0033] The present invention is described below by means of a specific example.

[0034] Taking the manure produced by the pig farm as the compost raw material as an example, the compost raw material is decomposed by biogas fermentation and the rapid composting decomposition process of the present invention, and the decomposition conditions of each are analyzed to obtain the analysis results. Figure 2 It can be seen that compared with biogas decomposition, the process of the present application significantly improves the elimination rate of hydrogen sulfide and ammonia, the degradation rate of organic matter and the assimilable organic carbon content.

[0035] Method 1: Use conventional biogas fermentation to treat pig farm manure.

[0036] Method 2: Use pig farm manure as compost raw material and screen composite bacteria; 3 1 kg of composite bacteria is added to the compost raw materials for mixed fermentation, and the moisture content is controlled at about 50%. The composting is completed after 20-27 days of fermentation without turning the pile.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made by any technician familiar with the field within the spirit and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A rapid decomposition-promoting process for composting at room temperature, characterized in that: The following steps are involved: The external elimination screening method was used to screen the composite bacterial strain with aerobic, microaerobic and anaerobic functions; According to 1m 3 Add 0.8-1.5kg of composite bacteria to the compost raw materials for mixed fermentation, and control the moisture content between 40-60%; Composting is completed after 20-27 days of fermentation.

2. A rapid decomposition-promoting process for composting at room temperature according to claim 1, characterized in that: The composite bacterial system includes one or more of Bacillus subtilis subsp. subtilis, Bacillus lysinicola, Bacillus aerobacter, Bacillus thermomylovora, Bacillus thermoacidophilus, Acinetobacter baumannii, Bacillus thermourea, Bacillus paleaerobic, and undefined colorless bacillus.

3. A rapid decomposition-promoting process for composting at room temperature according to claim 2, characterized in that: The composite bacterial system includes Bacillus subtilis subspecies subtilis, Achromobacter and others, and the composite ratio is 4.5-5:1:0.8-1.

2.

4. A rapid decomposition-promoting process for composting at room temperature according to claim 2, characterized in that: The composite bacterial system includes Bacillus subtilis subsp. subtilis, Bacillus lysine, intestinal core bacteria and others, and the composite ratio is 1:3.6-4.4:1.8-2.2:1.8-2.

2.

5. A rapid decomposition-promoting process for composting at room temperature according to claim 1, characterized in that: When the composting raw material is a liquid raw material, 1m 3 1±0.1kg of composite bacteria system is added to the compost raw materials for mixed fermentation.

6. A rapid decomposition-promoting process for composting at room temperature according to claim 5, characterized in that: Control the moisture content between 50±2%.

7. An organic fertilizer, characterized in that: The organic fertilizer is prepared by the room temperature composting rapid decomposition promotion process according to any one of claims 1 to 6, and the AOC content of the organic fertilizer is higher than 0.06%.

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