CN111072409A - Low-emission static oxygen-control biological enhanced humification composting method - Google Patents
Low-emission static oxygen-control biological enhanced humification composting method Download PDFInfo
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Abstract
The method for low-emission static oxygen-control biologically-enhanced humified compost comprises the following steps: respectively crushing the organic wastes into particles with the particle size less than 5cm, uniformly mixing and stirring the particles according to the weight ratio, and adding a biological reinforced compound microbial agent accounting for 1 to 5 per mill of the total weight of the mixed materials to ensure that the water content of the organic waste material is 60 to 65 percent, the carbon-nitrogen ratio is 23 to 30, and the volume weight is 700-3Obtaining compost raw materials, and respectively providing 0.40-0.45m of compost through a high-pressure aeration pipe in three stages of temperature rise, high temperature and temperature reduction of the compost3/h/m3、0.28‑0.38m3/h/m3And 0.13-0.26m3h/m3The air supply amount is enough to decompose the organic matters fully, after the fermentation is finished, the water content of the finished fertilizer is 33-42%, and the volume weight is reduced to 400-3The volume of the pile body is reduced by 30-50%, and the emission of methane, nitrous oxide, ammonia gas and hydrogen sulfide is reduced.
Description
Technical Field
The invention relates to a composting method, in particular to a low-emission static oxygen-control biologically-enhanced humification composting method.
Background
Research shows that the basic organic fertilizer resource in China currently has about 57 hundred million tons of solid quantity per year, wherein, the livestock manure is about 38 hundred million tons (fresh), the human manure is about 8 hundred million tons (fresh), the straws are about 10 hundred million tons (air-dried), the green manure is about 1 hundred million tons (fresh), and the cake manure is about 0.2 hundred million tons (air-dried). The compost is a method for treating the excrement of livestock and poultry by aerobic fermentation, and is mainly a process for converting organic matters into fertilizers by the fermentation action of microorganisms under certain moisture, C/N ratio and ventilation conditions under the manual control. In this composting process, the organic matter is converted from an unstable state to a stable humus substance, which is used as a fertilizer and to improve the soil.
A typical aerobic composting process is divided into 3 stages, each of which degrades different organic matter components by different dominant microbial populations. (1) A temperature rising stage: generally refers to the initial stage of aerobic composting, in which mesophilic microorganisms are the leading microorganisms, which mainly decompose soluble and easily degradable organic matters such as sugars and powders, and the temperature of the compost is gradually and rapidly increased from the ambient temperature to about 45 ℃. (2) And (3) high-temperature stage: when the temperature of the stack rises to 45 ℃, mesophilic microorganisms are inhibited and even die, and thermophilic microorganisms rise as a leading organism. The remaining and newly formed soluble organic matter in the heap continues to be decomposed, and at the same time, complex organic matter such as cellulose, high molecular fat, protein and complex carbohydrates also begins to be strongly decomposed, and the heap temperature continues to rise. When the temperature rises to 70 ℃ and above, most thermophilic microorganisms begin to enter the dormant and death phase (3) the cooling phase: due to the continuous consumption of soluble organic matter and the reduction of microbial activity, the temperature of the stack begins to drop to the ambient temperature, mesophilic microorganisms are again dominant and decompose refractory organic matter, and the stack basically enters the decomposition stage.
Compost has been widely used as a key technology for resource utilization of livestock and poultry manure, but carbon dioxide (CO) is generated and discharged in the aerobic composting process2) Methane (CH)4) Nitrous oxide (N)2O) and ammonia (NH)3) Various harmful gases in the water cause secondary pollution to a certain extent.
The oxygen content in the aerobic composting process is a key factor influencing the success rate and the efficiency of the compostingOne of the elements. When the ventilation and oxygen supply are insufficient, a large number of anaerobic areas can appear in the interior of the pile body, and CH is increased4The production and discharge of malodorous gases affect the composting process; excessive aeration promotes water evaporation and heat loss, so that the temperature is reduced, and the microbial activity is limited, thereby affecting the quality of compost.
Therefore, the make internal disorder or usurp method for low-emission static oxygen-control biologically-enhanced humified compost lays a theoretical foundation for engineering practice and has important significance for reducing environmental pollution and promoting agricultural sustainable development.
Disclosure of Invention
The invention aims to reduce the generation of carbon dioxide (CO) in the traditional composting process by statically controlling the oxygen content in the composting process and automatically adjusting a computer system in a time-temperature feedback mode2) Methane (CH)4) Nitrous oxide (N)2O) and ammonia (NH)3) And harmful gas emission is carried out, so that the defects of low content of easily-oxidized organic matters and humic acid in final compost products are overcome, and the low-emission environment-friendly low-emission static oxygen-controlling biologically-enhanced humified compost method is further provided.
The invention discloses a method for low-emission static oxygen-control biologically-enhanced humified compost, which comprises the following steps: it comprises the following steps:
(I) pretreatment of organic waste
Respectively crushing different types of organic wastes into particles with the particle size of less than 5cm, wherein the types of the organic wastes are kitchen wastes, livestock and poultry manure, straws, tail vegetables and garden wastes, proportioning two or more of the organic wastes according to the weight ratio, putting the organic wastes into a barrel type mixer for mixing for 15-30 minutes, adding a biologically-enhanced compound microbial agent accounting for 1-5 per mill of the total amount of mixed materials in the mixing process, and after the mixing is finished, the water content of the organic waste material is 60-65%, the carbon-nitrogen ratio is 23-30, and the volume weight is 700-3Obtaining compost raw materials;
(II) Stacking of compost raw Material
Stacking the compost raw materials in the step (I) in a fermentation tank, wherein a high-pressure aeration pipe connected with an air pump is arranged at the bottom of the fermentation tank, the air supply amount of the high-pressure aeration pipe is controlled by a computer system, the compost raw materials are not turned and thrown and are not transported in the fermentation process, and the computer system controls the air supply amount of the high-pressure aeration pipe according to different stages of fermentation;
(III) the fermentation period of the compost raw materials is 28-33 days, and the fermentation period is divided into a temperature rising stage, a high temperature stage and a temperature reducing stage
A temperature rising stage: the air supply quantity in the high-pressure aeration pipe is 0.40-0.45m3/h/m3Under the condition of (1), the temperature of the composting raw material is continuously increased within 3-4 days, the temperature finally reaches more than 65 ℃, the temperature increasing stage is a growth and reproduction stage of the microorganism, the mineralization process of organic matters provides nutrients for the growth of the microorganism, and the biological strengthening compound microbial inoculum provides rich nutrient substances for the microorganism, thereby effectively promoting the growth and reproduction of the microorganism;
and (3) high-temperature stage: the air supply quantity in the high-pressure aeration pipe is 0.28-0.38m3/h/m3Under the condition, the temperature of the composting raw material is kept within the range of 65-80 ℃ within the next 8-10 days, in the high-temperature stage, the thermophilic fungi action of the composting raw material in the biological strengthening compound microbial agent accelerates the strong decomposition of complex organic matters of protein, cellulose and hemicellulose, meanwhile, the biological strengthening compound microbial agent provides quinone-based substances which are used as intermediate substances in the humification process and can promote the humification of organic substances to form a large amount of humic acid;
and (3) cooling: after the high temperature stage is finished, the temperature of the compost raw materials is gradually reduced to be below 40 ℃ within 17-19 days, and the air supply amount of the high-pressure aeration pipe is 0.13-0.26m in the process of temperature reduction3h/m3In the cooling stage, mesophilic bacteria in the biological strengthening compound microbial agent begin to form dominant flora, residual organic matters which are difficult to decompose are further decomposed, and humus is continuously increased and tends to be stabilized;
after the fermentation is finished, the finished fertilizer is obtained, the water content of the finished fertilizer is 33-42%, and the volume weight is reduced to 400-3The volume of the pile is reduced by 30-50%.
The invention discloses a method for low-emission static oxygen-control biologically-enhanced humified compost, which comprises the following steps: the biological strengthening compound microbial agent is formed by combining one or more of bacillus, thermophilic sporotrichum, lactobacillus, saccharomycetes, pseudomonas, streptomycete, trichoderma, aspergillus and white rot fungi.
The invention discloses a method for low-emission static oxygen-control biologically-enhanced humified compost, which comprises the following steps: the diameter of the aeration holes of the high-pressure aeration pipe is less than 0.1mm, and the aeration holes are uniformly distributed at the bottom of the fermentation tank at the interval of 60 x 60 cm.
Compared with the traditional composting method, the low-emission static oxygen-control biological enhanced humification composting method has the following advantages:
(1) the method for low-emission static oxygen-control biologically-enhanced humified compost designs the pretreatment of organic waste, can ensure that multi-component organic waste is uniformly and fully mixed, and provides necessary basic conditions for the full contact of the subsequent compost raw materials with microbial inoculum and oxygen;
(2) a high-pressure aeration system:
the high-pressure aeration pipe provides continuous air supply quantity, the diameter of an aeration hole is less than 0.1mm, and the blockage rate is low; aeration holes are densely distributed, namely, the aeration holes are uniformly distributed at the bottom of the fermentation tank by 60 x 60cm, the aeration holes are uniform, air supply is sufficient, the ventilation quantity is adjustable, high-temperature fermentation can be performed all the year round, reliable and stable performance can be exerted all the year round, the high-pressure aeration technology ensures sufficient oxygen supply, the phenomenon of odor inhibition is realized, and due to static aerobic fermentation, turning operation is not needed, and further labor cost and fuel cost are greatly reduced. In addition, by saving fuel, it is possible to further reduce the amount of carbon dioxide discharged and shorten the composting fermentation period.
(3) According to the method for low-emission static oxygen-control biologically-enhanced humified compost, disclosed by the invention, the oxygen introduction amount is adjusted in time according to different oxygen demands of compost raw materials in a temperature rise stage, a high temperature stage and a temperature reduction stage, so that the temperature of the compost is prevented from being reduced by a large amount of forced ventilation, and the temperature rise and composting effects of the compost are prevented from being influenced.
(4) The low-emission static oxygen-control biological enhanced humification composting method provided by the invention has the advantages that the humification efficiency is obviously improved, the secondary pollution is reduced, the cost is reduced, and the humic acid is improved by 20-90%;
(5) the method for preparing the low-emission static oxygen-control biologically-enhanced humified compost has high production efficiency: the high-pressure aeration system is combined with the intensified humification technology, and the whole fermentation process is completed after static aerobic fermentation for 30 days;
(6) the method for low-emission static oxygen-control biologically-enhanced humified compost is environment-friendly: inhibiting mineralization and fixation of carbon and nitrogen, reducing malodour and greenhouse gas generation, and compared with the traditional composting process, the method can lead CH to be used4And N2The emission coefficient of O is reduced by 10-30%, and the emission of the malodorous gases (ammonia and hydrogen sulfide) in the factory is only one forty times of the national first-level emission standard.
(7) The method for low-emission static oxygen-control biologically-enhanced humified compost has low operation cost: the labor is less, the energy consumption is low, and the production cost is reduced by more than 30 percent;
(8) the method for preparing the low-emission static oxygen-control biologically-enhanced humified compost has high safety: different heavy metals are passivated in the fermentation process, the passivation rate is 5-35%, and the finished product is high in safety;
(9) the method for preparing the low-emission static oxygen-control biologically-enhanced humified compost has the advantages that the product quality is good: compared with the traditional composting method, the method disclosed by the invention can enable the content of the organic matters to reach 52-56%, the content of the easily-oxidized organic matters to reach 15-17%, the total nutrient to reach 3.8-4.2%, the total nitrogen to be improved by 10-40%, the organic matters to be improved by 10-30% and the easily-oxidized organic matters to be improved by 20-60%.
Drawings
FIG. 1 shows the composting raw material D1N in the composting process2O emissions (ppm);
FIG. 2 shows CH in the composting process of D1 as a composting material4Emissions (ppm);
FIG. 3 shows CO in the composting process of D1 as a composting material2Emissions (ppm);
fig. 4 shows the change of organic matter content and easily-oxidized organic matter content in the compost product of compost raw material D1.
Detailed Description
The following examples are given to further illustrate the embodiments of the present invention. The following examples are intended to illustrate the invention but are not intended to limit the scope thereof
(I) pretreatment of organic waste
Respectively crushing different types of organic wastes into particles with the particle size of less than 5cm, wherein the types of the organic wastes comprise: kitchen waste, livestock and poultry manure, straw, waste vegetables and garden waste are prepared by respectively crushing cow dung and peanut shells in the organic waste into particles with the particle size of less than 5cm, then proportioning according to the weight ratio of 7:3, putting the mixture into a barrel type mixer for mixing for 25 minutes, adding a biologically-enhanced compound microbial inoculum which accounts for 1-5 per mill of the total mixed material in the mixing process, wherein the microbial inoculum is provided by Beijing Jia Bo Biotechnology Limited company and is BGB-1, BGB-2 and BGB-3 respectively, and uniformly mixing to obtain compost raw materials D1, D2 and D3, wherein specific characteristic values are shown in Table 1 below.
TABLE 1 compost raw material characteristics (mean. + -. standard deviation)
(II) Stacking of compost raw Material
The composting raw material D1 is taken as an example to implement a low-emission static oxygen-control biological strengthening humification composting method.
Stacking the composting raw material D1 in the step (I) in a fermentation tank by using a forklift, wherein the height of the composting raw material pile in the fermentation tank is 2 meters, the length of the fermentation tank is 13 meters, the width of the fermentation tank is 6 meters, the feeding amount is about 90 tons, a high-pressure aeration pipe connected with an air pump is arranged at the bottom of the fermentation tank, the diameter of an aeration hole of the high-pressure aeration pipe is less than 0.1mm, the aeration holes are uniformly distributed at the bottom of the fermentation tank at the interval of 60 x 60cm, the air supply amount of the high-pressure aeration pipe is controlled by a computer system, the composting raw material is not thrown over or transferred in the fermentation process, and the computer system controls the air supply amount of the high-pressure aeration pipe according to the fermentation time;
the fermentation period of the compost raw material D1 is 28-33 days, and the fermentation period is divided into a temperature rising stage, a high temperature stage and a temperature lowering stage
A temperature rising stage: in high-pressure aeration tubesAir supply amount is 0.40m3/h/m3Under the condition of (1), the temperature of the composting raw material D1 is continuously increased within 3 days, after 3 days, the temperature of a fermentation pile body at the depth of 80cm is 69-71 ℃, the temperature is a microorganism self-growth and reproduction stage in a temperature rise stage, the mineralization process of organic matters provides nutrients for the growth of the microorganisms, and the biological strengthening compound microbial inoculum provides rich nutrient substances for the microorganisms and effectively promotes the growth and reproduction of the microorganisms;
and (3) high-temperature stage: from day 4 onward, the air supply amount to the high-pressure aeration pipe was adjusted to 0.29m3/h/m3The compost raw material D1 is maintained for 8 days at the temperature of 69-80 ℃, the highest temperature at the depth of 80cm reaches the temperature of 80 ℃, in the high-temperature stage, the thermophilic fungi action of the compost raw material in the biological reinforced compound microbial inoculant accelerates the strong decomposition of complex organic matters of protein, cellulose and hemicellulose, meanwhile, the biological reinforced compound microbial inoculant provides quinone-based substances which are used as intermediate substances in the humification process and can promote the humification of organic substances and directionally form a large amount of humic acid, and at the moment, the compost raw material D1 is fermented for 11 days;
and (3) cooling: after the high temperature stage was completed, the amount of air supplied to the high pressure aeration pipe was adjusted to 0.24m from day 123/h/m3Adjusting the air supply amount of the high-pressure aeration pipe to 0.21m on the 20 th day of fermentation3/h/m3At this time, the temperature of the 50cm deep part of the heap is 50-52 ℃, the water content of the compost raw material D1 is 48%, the volume of the heap is reduced by about 25%, and the air supply amount of the high pressure aeration pipe is adjusted to 0.18m at the 25 th day of fermentation3/h/m3And (4) finishing fermentation after 30 days of fermentation, and obtaining a finished fertilizer after the fermentation is finished, wherein the water content of the finished fertilizer is 42 percent, and the volume weight is reduced to 570kg/m3The volume of the compost is reduced by 35 percent, and the deep temperature of the composting raw material D150 cm is 38-39 ℃. In the cooling stage, mesophilic bacteria in the biological strengthening compound microbial agent begin to form dominant flora, residual organic matters which are difficult to decompose are further decomposed, and humus is continuously increased and tends to be stabilized.
The air supply of the high-pressure aeration pipe is the amount of air supplied to each cubic meter of composting material per hour. N in the composting process2O、CH4And CO2The emission amount of the organic fertilizer is shown in fig. 1 to 3, the emission results of malodorous pollutant gas in the composting process are shown in table 2, the passivation effect on heavy metals is shown in table 3, and the detection results of each component of the composting product and the change condition of the composting process are shown in fig. 4.
As can be seen from FIGS. 1 to 3, in the composting process, N is contained in the composting raw material D12O、CH4And CO2The discharge process of (a) fluctuates from composting stage to composting stage.
The nitrification of ammonium nitrogen and the denitrification of nitrate nitrogen in the composting process have the possibility of generating N2O, as can be seen from FIG. 1, N2The emission of O is mainly concentrated in the early stage of composting, the later stage tends to be stable, and N is generated after composting2The peak value of O is caused by nitrate generated under aerobic condition entering into anaerobic area or micro-aerobic environment to generate N through denitrification2O, N under the condition of no pile turning shown by research2The discharge amount of O is 3.5 times of that of the turned pile, and the embodiment plays a role of reducing N by supplying oxygen accurately2The purpose of O emission is realized, and meanwhile, the labor cost and the capital cost are saved.
Methane emissions increase in the case of oxygen starvation. In this example, the amount of pores increases after oxygen supply, the anaerobic zone decreases, and the amount of methane emission decreases.
CO2The release rate of (A) represents the degradation rate of the organic matter and the activity of the microorganisms, and the CO is released in the composting process of the embodiment2The discharge trend is consistent, the accurate oxygen supply plays a positive role in maintaining the temperature of the compost, the temperature raising speed is ensured, and the composting efficiency is prevented from being lowered due to the temperature reduction caused by forced ventilation. At the same time, the static oxygen control technology is used for CO2The discharge of the reactor plays a stabilizing role, and CO is discharged in a high-temperature stacking stage2There was no significant increase in emissions.
Examples of the invention compost raw Material D1 foul gas factory discharge results of ammonia gas and hydrogen sulfide gas were 0.025mg/m, respectively3And 0.0008mg/m3And is an order of magnitude lower than national first-class emission standards, and is about one forty times lower. This gas detection is autumn detection.
Before and after composting, the composting raw material D1 has passivation effects on four heavy metals of Cu, Pb, Zn and Cd, and the passivation rates are respectively as follows: 19.14%, 28.34%, 6.65% and 31.25%.
After the compost raw material D1 is treated by the method, the content of organic matters is increased by 15.25%, the content of easily-oxidized organic matters is increased by 43.67%, the content of total nutrients is increased by 12%, and the content of humic acid is increased by 83%.
The total nitrogen in the compost comprises organic nitrogen and inorganic nitrogen, wherein the change of the organic nitrogen mainly comprises the fixation and release of nitrogen. The mineralization of organic nitrogen, the volatilization of continuous ammonia and the denitrification of nitrate nitrogen all cause the loss of nitrogen in the composting process. In the initial reactor stage, the nitrogen-containing organic matter in the material is decomposed into ammonia gas to volatilize, and the total nitrogen content is reduced after being increased. In the middle and later periods of the compost, nitrogen in the material is fixed along with the nitrification of microorganisms in BGB-1, and the loss of the nitrogen is gradually reduced and tends to be stable.
TABLE 2 compost raw material D1 detection of malodorous pollutants in the kingdom (2019.9)
| Item | First order discharge standard | Detection value | Execution criteria |
| Ammonia gas | 1.0mg/m3 | 0.025mg/m3 | GB 14554-1993 |
| Hydrogen sulfide | 0.03mg/m3 | 0.008mg/m3 | GB 14554-1993 |
TABLE 3 change of mass fractions of 4 heavy metals before and after composting of compost raw material D1
TABLE 4 detection results of various components of compost raw material D1 compost product
| Detecting items | Detection value | Standard value | Rate of increase | Basis of detection |
| Organic matter (%) | 56.1 | 40.0 | 15.25 | NY/T 2876-2015 |
| Oxidizable organic substance (%) | 15.1 | 30.0 | 43.67 | NY/T 2876-2015 |
| PH | 7.53 | / | / | NY 525-2012 |
| Total nitrogen (%) | 1.38 | / | / | NY 525-2012 |
| Phosphorus pentoxide (%) | 0.98 | / | / | NY 525-2012 |
| Potassium oxide (%) | 1.24 | / | / | NY 525-2012 |
| Total nutrient (%) | 3.6 | 5.0 | 12.0 | NY 525-2012 |
The above-described cases are merely preferred use cases of the present patent, and the present patent is not intended to limit the above-presented preferred cases, but it will be understood by those skilled in the relevant art that various changes in form and details can be made therein without departing from the spirit and scope of the present patent. Any modification, equivalent replacement, improvement and the like made within the spirit and scope of the present invention shall be included in the protection scope of the present invention.
Claims (3)
1. A method for biologically strengthening humified compost by low-emission static oxygen control is characterized by comprising the following steps: it comprises the following steps:
(I) pretreatment of organic waste
Respectively crushing different types of organic wastes into particles with the particle size of less than 5cm, wherein the types of the organic wastes are kitchen wastes, livestock and poultry manure, straws, tail vegetables and garden wastes, proportioning two or more of the organic wastes according to the weight ratio, putting the organic wastes into a barrel type mixer for mixing for 15-30 minutes, adding a biologically-enhanced compound microbial agent accounting for 1-5 per mill of the total amount of mixed materials in the mixing process, and after the mixing is finished, the water content of the organic waste material is 60-65%, the carbon-nitrogen ratio is 23-30, and the volume weight is 700-3Obtaining compost raw materials;
(II) Stacking of compost raw Material
Stacking the compost raw materials in the step (I) in a fermentation tank, wherein a high-pressure aeration pipe connected with an air pump is arranged at the bottom of the fermentation tank, the air supply amount of the high-pressure aeration pipe is controlled by a computer system, the compost raw materials are not turned and thrown and are not transported in the fermentation process, and the computer system controls the air supply amount of the high-pressure aeration pipe according to different stages of fermentation;
(III) the fermentation period of the compost raw materials is 28-33 days, and the fermentation period is divided into a temperature rising stage, a high temperature stage and a temperature reducing stage
A temperature rising stage: the air supply quantity in the high-pressure aeration pipe is 0.40-0.45m3/h/m3Under the condition of (1), the temperature of the compost raw material is continuously increased within 3-4 days, the temperature finally reaches more than 65 ℃, the temperature increasing stage is a growth and propagation stage of the microorganism, the mineralization process of organic matters provides nutrients for the growth of the microorganism, and the biological strengthening compound microbial inoculum provides rich nutrient substances for the microorganism, so that the growth and propagation of the microorganism are effectively promoted;
and (3) high-temperature stage: the air supply quantity in the high-pressure aeration pipe is 0.28-0.38m3/h/m3Under the condition, the temperature of the composting raw material is kept within the range of 65-80 ℃ within the next 8-10 days, in the high-temperature stage, the thermophilic fungi action of the composting raw material in the biological strengthening compound microbial agent accelerates the strong decomposition of complex organic matters of protein, cellulose and hemicellulose, meanwhile, the biological strengthening compound microbial agent provides quinone-based substances which are used as intermediate substances in the humification process and can promote the humification of organic substances to form a large amount of humic acid;
and (3) cooling: after the high temperature stage is finished, the temperature of the compost raw materials is gradually reduced to be below 40 ℃ within 17-19 days, and the air supply amount of the high-pressure aeration pipe is 0.13-0.26m in the process of temperature reduction3h/m3In the cooling stage, mesophilic bacteria in the biological strengthening compound microbial agent begin to form dominant flora, residual organic matters which are difficult to decompose are further decomposed, and humus is continuously increased and tends to be stabilized;
after the fermentation is finished, the finished fertilizer is obtained, the water content of the finished fertilizer is 33-42%, and the volume weight is reduced to 400-3The volume of the pile is reduced by 30-50%.
2. The method for low-emission static oxygen-control biologically-enhanced humified compost of claim 1, wherein: the biological strengthening compound microbial agent is prepared by combining one or more of bacillus, thermophilic sporotrichum, lactobacillus, saccharomycetes, pseudomonas, streptomycete, trichoderma, aspergillus and white rot fungi.
3. The method for low-emission static oxygen-control biologically-enhanced humified compost of claim 2, wherein: the diameter of the aeration holes of the high-pressure aeration pipe is less than 0.1mm, and the aeration holes are uniformly distributed at the bottom of the fermentation tank at the interval of 60 x 60 cm.
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| CN111940452B (en) * | 2020-06-24 | 2022-10-14 | 中农新科(苏州)有机循环研究院有限公司 | Biological drying sectional type aeration method |
| CN112960995A (en) * | 2021-03-03 | 2021-06-15 | 太仓绿丰农业资源开发有限公司 | Method for producing organic fertilizer by airflow membrane fermentation of tailed vegetables, product and application thereof |
| CN113303202A (en) * | 2021-04-27 | 2021-08-27 | 南京农业大学 | Seedling culture medium developed from aerobic fermentation product of agricultural wastes of tail vegetable sources and application of seedling culture medium |
| CN113582736A (en) * | 2021-06-17 | 2021-11-02 | 北京四良科技有限公司 | Compost preparation method adopting enzyme-bacterium composite leavening agent for four-stage fermentation |
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| CN114011856A (en) * | 2021-11-02 | 2022-02-08 | 同济大学 | Aerobic and anaerobic cooperative treatment method for rural kitchen waste |
| CN114011856B (en) * | 2021-11-02 | 2022-11-01 | 同济大学 | Aerobic and anaerobic cooperative treatment method for rural kitchen waste |
| CN114853512A (en) * | 2022-06-02 | 2022-08-05 | 天津大学 | Method for promoting humus formation in composting process and compost product |
| CN114920594A (en) * | 2022-06-30 | 2022-08-19 | 北京科技大学 | Method for co-composting kitchen waste and biogas residues and application thereof |
| CN117720368A (en) * | 2023-11-17 | 2024-03-19 | 广东省农业科学院农业资源与环境研究所 | Method for preparing organic fertilizer by using molecular film coupled persulfate and application of method |
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