CN112608171A - Method for treating organic waste by closed fermentation bin - Google Patents
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- CN112608171A CN112608171A CN202110000102.3A CN202110000102A CN112608171A CN 112608171 A CN112608171 A CN 112608171A CN 202110000102 A CN202110000102 A CN 202110000102A CN 112608171 A CN112608171 A CN 112608171A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/20—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation using specific microorganisms or substances, e.g. enzymes, for activating or stimulating the treatment
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/60—Heating or cooling during the treatment
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
- C05F17/964—Constructional parts, e.g. floors, covers or doors
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
- C05F17/964—Constructional parts, e.g. floors, covers or doors
- C05F17/971—Constructional parts, e.g. floors, covers or doors for feeding or discharging materials to be treated; for feeding or discharging other material
- C05F17/979—Constructional parts, e.g. floors, covers or doors for feeding or discharging materials to be treated; for feeding or discharging other material the other material being gaseous
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/90—Apparatus therefor
- C05F17/993—Arrangements for measuring process parameters, e.g. temperature, pressure or humidity
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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- Organic Chemistry (AREA)
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Abstract
The invention discloses a method for treating organic waste by a closed fermentation bin. The method comprises the following specific steps: adding a fermentation microbial inoculum in proportion after the organic waste is pretreated, uniformly mixing, conveying the mixture to a closed fermentation bin for composting fermentation, performing biodegradation and stabilization on the material by controlling fermentation reaction conditions such as temperature, ventilation, moisture and the like, and preparing the organic fertilizer by crushing, screening, aging, detecting, packaging and other procedures to finish recycling. The method is simple and easy to operate, the prepared fertilizer has high nutrient content and less loss, and the method has the advantages of high starting temperature rise speed, short fermentation period, high harmless degree, small influence of weather conditions, high treatment efficiency, low energy consumption, environmental protection, small occupied area and capability of realizing mechanized mass production.
Description
Technical Field
The invention belongs to the field of organic waste resource utilization, and particularly relates to a method for treating organic waste by using a closed fermentation bin.
Background
Organic solid wastes have become an important source of non-point source pollution of ecological environment and agriculture in China. A large amount of organic solid wastes are generated in China every year, wherein livestock and poultry breeding wastes are about 40 million t, crop straws are about 7.0 million t, urban sludge is about 3500 million t, vegetable production and processing wastes are about 1-1.5 million t, meat processing wastes are about 5000-6500 million t, soybean meal and the like are about 2500 million t, and forest wastes are about 3700 million square meters. The COD of livestock and poultry waste discharged each year reaches 1268 million, which accounts for 95.8% of the total agricultural discharge amount and becomes the most main non-point source pollution source. The organic wastes have various types and large generation amount, and have the hazards of complex components, easy decay, decomposition, odor generation, pathogenic bacteria generation, environmental pollution and the like. The unorganized burning of the crop straws, the random discharge of human and animal excreta and other organic wastes are unreasonably disposed, and the physical and mental health, the water and soil environment and the ecological civilization construction of residents are directly influenced. Therefore, how to convert organic wastes into utilizable resources and energy according to local conditions and realize resource recycling becomes a major problem in the sustainable development of agriculture in China.
The organic solid waste is not only a great environmental pollution source, but also a huge resource and energy bank. According to estimation, the biomass energy contained in the organic waste in China is about equal to 10 hundred million standard coals, and meanwhile, the fertilizer value of the organic waste rich in N, P, K, organic matters and other nutrients is equal to the annual production total amount of chemical fertilizers in China. Although organic wastes have higher nutrient and energy values, an efficient and energy-saving organic waste resource utilization method is still lacked at present. The key problem of waste recycling is to convert elements difficult to utilize in organic materials into forms easy to be absorbed and utilized by plants, so as to achieve the dual effects of waste recycling and reducing pollutant diffusion. From the analysis of material and energy circulation, the soil fertility can be continuously maintained only by finally returning the waste into the soil, and the real nutrient element circulation and balance are realized.
The traditional compost fermentation has long fermentation time, generally needs about 15-25 days, and a production enterprise needs a large turnover field; harmful gases such as skatole, hydrogen sulfide, methane and the like are generated in the fermentation process, secondary pollution is generated to the atmosphere, and the operation environment of a factory is poor; most of nitrogen is lost in the fermentation process, so that waste is caused on one hand, and the atmosphere is polluted on the other hand.
Therefore, it is necessary to provide a resource technology method with simple process, short fermentation time, high harmless degree, controllable secondary pollution, low energy consumption and environmental protection for organic solid waste.
Disclosure of Invention
The invention aims to solve the problems of complex process, long fermentation time, serious odor of operating environment, great influence by environment, large occupied area, high operation cost and the like in the prior art, and provides a method for treating organic wastes by using a closed fermentation bin.
In order to achieve the above purpose, the invention provides the following technical scheme:
a method for treating organic waste by a closed fermentation bin comprises the following steps:
(1) pretreatment of organic waste: squeezing and dehydrating the organic waste, crushing the auxiliary raw materials into particles with the particle size of 10-20mm, fully mixing, adjusting the water content to 45-65%, the C/N mass ratio to 20-35:1 and the pH value to 7-8 to obtain an organic material;
(2) adding a compound leaven into the organic materials, fully stirring and then conveying the organic materials into a closed fermentation bin for composting fermentation;
(3) controlling fermentation reaction conditions: the ventilation system is provided with an air inlet fan at the tail part of the fermentation bin, adopts intermittent ventilation and oxygen supply, and has air flow of 0.2-0.4m3Ventilating for 3 times every day in 3 time periods of morning, afternoon and evening, wherein the ventilation time is 20 min; a heater is arranged at the air inlet fan, hot air is blown into the bin to properly adjust the temperature balance of the whole system, so that the organic material is quickly heated to 50-70 ℃ and is maintained for more than 3 days; the materials are mixed by the rotation and the rolling of the fermentation bin, enter from a feed inlet of the bin body and move to a discharge outlet at the tail end of the reactor along the bin body;
(4) the closed fermentation cabin adopts a first-in first-out material inlet and outlet mode, namely the first-in material is firstly fermented, the later-in material is then fermented, the materials are fed for 1.0-3t and discharged for 0.8-1.7t every day according to the regulation, and the composting period is generally 5-7 days; four temperature thermocouples are axially distributed on the fermentation bin body and are used for detecting and monitoring the specific temperature value of the material in each fermentation stage; when the temperature monitored by the bottom thermocouple is close to the ambient temperature, the fermentation material is completely decomposed, the fermentation process is completed, and discharging is started;
(5) after fermentation is started, the deodorizing fan starts to work and is used for discharging metabolic waste gas of fermentation strains, and the metabolic waste gas is discharged into the filtering tank through a pipeline and is treated together with waste water in a centralized way;
(6) and (3) sequentially performing extrusion granulation, rounding, drying, cooling, screening, detection and packaging on the completely decomposed material to finish the treatment of the organic waste to obtain a finished product, wherein the finished product serving as a fertilizer meets various requirements of organic fertilizer standards (NY 525-2011).
Preferably, the organic waste is at least one of livestock and poultry manure, sludge with high organic matter content and urban organic domestic garbage, and if the organic waste is a mixture, the organic waste is combined at any ratio; meanwhile, in order to ensure the balanced nutrition ratio of the fermentation raw materials, auxiliary raw materials are added to adjust the carbon-nitrogen ratio and the water content; the auxiliary raw materials comprise at least one of plant straws and wood chips, and if the auxiliary raw materials are a mixture, the organic wastes are combined at any ratio.
Preferably, the compound leaven is a mixture of a mixed microbial inoculum and a combined enzyme; wherein the mixed microbial inoculum is a mixture of bacillus cereus, bacillus subtilis, bacillus licheniformis, bacillus megaterium, bacillus circulans, bacillus sphaericus, trichoderma viride, trichoderma reesei and aspergillus niger, and the inoculation amount is 0.2-0.3% of the weight of the organic material; the combined enzyme agent is a mixture of protease 3000-.
The invention has the following beneficial effects:
1. the fermentation cabin used in the method of the invention adopts continuous operation, has fast degradation speed, short fermentation time and smaller occupied area, and the composting process is not influenced by weather conditions, and the generated waste gas and waste water can be collected and treated in a unified way, thereby reducing the secondary pollution to the environment and solving the odor problem at the same time.
2. The temperature and the exhaust gas during the fermentation period can be monitored at any time, the ventilation volume can be adjusted at any time, and the automatic operation is realized. The high degree of operational flexibility reduces the variety of problems that may arise in composting and may be combined with a variety of machinery suitable for commercial mass production.
3. The stirring and moving of the materials in the reactor can be completed by gravity, so that not only can better mixing be achieved, but also the operating cost can be saved.
Detailed Description
The present invention is further illustrated by the following specific examples.
A method for treating organic waste by a closed fermentation bin comprises the following steps:
(1) pretreatment of organic waste: and (2) extruding and dehydrating the organic waste, crushing the auxiliary raw material materials into particles with the particle size of 10-20mm, fully mixing, adjusting the water content to 45-65%, the C/N mass ratio to 20-35:1 and the pH value to 7-8 to obtain the organic material.
(2) Adding a compound leaven into the organic materials, fully stirring and then conveying the organic materials into a closed fermentation bin for composting fermentation.
(3) Controlling fermentation reaction conditions: the ventilation system is provided with an air inlet fan at the tail part of the fermentation bin, adopts intermittent ventilation and oxygen supply, and has air flow of 0.2-0.4m3Ventilating 3 times per day in 3 time periods of morning, afternoon and evening, wherein each time is 20 min. The heater is arranged at the air inlet fan, hot air can be blown into the bin, the temperature balance of the whole system can be properly adjusted, the organic materials are rapidly heated to 50-70 ℃, and the temperature is maintained for more than 3 days. The materials are mixed by rotating and rolling the fermentation bin, enter from the feed inlet of the bin body and move to the discharge outlet at the tail end of the reactor along the bin body, and the rotating and rolling time and the rotating and rolling interval of the fermentation bin are determined as required.
(4) The closed fermentation chamber adopts a first-in first-out material inlet and outlet mode, namely the first-in material is firstly fermented, the later-in material is then fermented, the materials are fed for 1.0-3t and discharged for 0.8-1.7t every day according to the regulation, and the composting period is generally 5-7 days. Four temperature thermocouples are axially distributed on the fermentation cabin body and used for detecting and monitoring the specific temperature value of the material at each fermentation stage. When the temperature monitored by the bottom thermocouple is close to the ambient temperature, the fermentation material is completely decomposed, the fermentation process is completed, and discharging can be started.
(5) After the fermentation is started, the deodorizing fan starts to work and is used for discharging metabolic waste gas of fermentation strains, and the metabolic waste gas is discharged into the filtering tank through a pipeline and is treated together with waste water in a centralized way.
(6) And (3) sequentially performing extrusion granulation, rounding, drying, cooling, screening, detection, packaging and other processes on the completely decomposed material to finish the treatment of the organic waste to obtain a finished product, wherein the finished product serving as a fertilizer meets various requirements of organic fertilizer standards (NY 525-2011).
The organic waste is at least one of organic matters such as livestock and poultry manure, sludge with high organic matter content, urban organic domestic garbage and the like, and if the organic waste is a mixture of more than two of the organic matters, the proportion of each component is determined at will. Meanwhile, in order to ensure the balanced nutrition ratio of the fermentation raw materials, auxiliary raw materials such as plant straws, wood chips and the like are required to be added to adjust the carbon-nitrogen ratio and the water content, and if the fermentation raw materials are various auxiliary raw materials, the proportions of the components are determined at will.
The compound leaven is a mixture of a mixed microbial inoculum and a combined enzyme agent. Wherein the mixed microbial inoculum is a mixture of bacillus cereus, bacillus subtilis, bacillus licheniformis, bacillus megaterium, bacillus circulans, bacillus sphaericus, trichoderma viride, trichoderma reesei and aspergillus niger, and the microbial inoculum amount of the mixed microbial inoculum is combined according to the requirement. The inoculation amount of the microbial mixed inoculum is 0.2 to 0.3 percent of the weight of the organic material. The combined enzyme agent is a mixture of protease 3000-. The dosage of the combined enzyme agent is 0.5-1 part by weight of the combined enzyme agent per 100 parts by weight of the organic material.
The principle of the invention is illustrated as follows:
the fermentation bin system is characterized in that materials are placed in a partially or completely closed container, aeration and moisture conditions are controlled, the materials are subjected to biodegradation and conversion and are mixed through rotation and rolling of the fermentation bin, the materials enter from a feeding hole of a bin body and move to a discharging hole at the tail end of a reactor along the bin body, and high-degree mechanization and automation are realized.
The temperature of the aerobic compost is high, and the aerobic compost is generally composted at a high temperature of 50-65 ℃. Therefore, pathogenic bacteria and weed seeds can be killed to the maximum extent, microorganisms can be propagated, the degradation speed of organic matters is high, and the fermentation period is shortened.
And calculating the amount of water and N element required to be added according to the water content of the stack material and the mass ratio of C to N required by the process scheme. When the carbon/nitrogen mass of the material used is relatively high, this is adjusted by adding straw/urea to the heap.
Example 1
A method for treating organic waste by a closed fermentation bin sequentially comprises the following steps:
(1) pretreatment of organic waste: squeezing and dehydrating the livestock and poultry manure, then crushing the livestock and poultry manure and plant straws into particles with the particle size of about 20mm, fully mixing the particles, adjusting the water content to 50%, adjusting the mass ratio of C to N to 30:1 and the pH value to 7-8 to obtain the organic material.
(2) Adding a compound leaven into the organic materials, fully stirring and then conveying the organic materials into a closed fermentation bin for composting fermentation.
(3) Controlling fermentation reaction conditions: the ventilation system is provided with an air inlet fan at the tail part of the fermentation bin, adopts intermittent ventilation and oxygen supply, and has air flow of 0.3m3Ventilating 3 times per day in 3 time periods of morning, afternoon and evening, wherein each time is 20 min. A heater (electric heater) is arranged at the air inlet fan, hot air is blown into the bin to properly adjust the temperature balance of the whole system, so that the organic materials are quickly heated to 65 ℃ and are maintained for more than 3 days. The materials are mixed by the rotation and the rolling of the fermentation bin, enter from a feed inlet of the bin body, move to a discharge outlet at the tail end of the reactor along the bin body, and turn over once every 120 minutes.
(4) Feeding 2.5t and discharging 1.5t according to the regulation every day, when a thermocouple at the bottom of the fermentation bin monitors that the temperature is close to the ambient temperature, the fermentation material is completely decomposed, the fermentation process is completed, and discharging is started.
Example 2
The difference from example 1 is that:
(1) pretreatment of organic waste: squeezing and dehydrating the kitchen waste, then crushing the kitchen waste and plant straws into particles with the particle size of about 15mm, fully mixing the particles, adjusting the water content to 55%, the mass ratio of C to N to 25:1 and the pH value to 7-8 to obtain the organic material.
(2) Adding a compound leaven into the organic materials, fully stirring and then conveying the organic materials into a closed fermentation bin for composting fermentation.
(3) Controlling fermentation reaction conditions: the ventilation system is provided with an air inlet fan at the tail part of the fermentation bin, adopts intermittent ventilation and oxygen supply, and has air flow of 0.4m3Ventilating 3 times per day in 3 time periods of morning, afternoon and evening, wherein each time is 20 min. The heater is arranged at the air inlet fan, hot air can be blown into the bin, the temperature balance of the whole system can be properly adjusted, the organic materials are rapidly heated to 65 ℃, and the organic materials are maintained for more than 3 days. The materials are mixed by the rotation and the rolling of the fermentation bin, enter from a feed inlet of the bin body, move to a discharge outlet at the tail end of the reactor along the bin body, and rotate and turn over once every 10 to 60 minutes.
(4) Feeding 1.5t and discharging 1.0t according to the regulation every day, when the temperature monitored by the bottom thermocouple is close to the ambient temperature, the fermentation material is completely decomposed, the fermentation process is completed, and discharging is started.
Example 3
The difference from example 1 is that:
(1) pretreatment of organic waste: squeezing and dehydrating the mushroom bran, crushing the mushroom bran into particles with the particle size of about 15mm, adjusting the water content to 45%, the C/N mass ratio to 35:1 and the pH value to 7-8 to obtain the organic material.
(2) Adding a compound leaven into the organic materials, fully stirring and then conveying the organic materials into a closed fermentation bin for composting fermentation.
(3) Controlling fermentation reaction conditions: the ventilation system is provided with an air inlet fan at the tail part of the fermentation bin, adopts intermittent ventilation and oxygen supply, and has air flow of 0.5m3Ventilating 3 times per day in 3 time periods of morning, afternoon and evening, wherein each time is 20 min. The heater is arranged at the air inlet fan, hot air can be blown into the bin, the temperature balance of the whole system can be properly adjusted, the organic materials are rapidly heated to 65 ℃, and the organic materials are maintained for more than 3 days. The materials are mixed by the rotary rolling of the fermentation bin, enter from a feed inlet of the bin body, move to a discharge outlet at the tail end of the reactor along the bin body, and turn over once every 60-300 minutes.
(4) Feeding 2.0t and discharging 1.0t according to the regulation every day, when the temperature monitored by the bottom thermocouple is close to the ambient temperature, the fermentation material is completely decomposed, the fermentation process is completed, and discharging is started.
In order to detect the application effect of the invention, the organic materials are naturally composted and fermented to be a comparison group, the above examples are taken as test groups, and the test groups and the comparison group are respectively used for performing composting and fermentation tests on the organic materials, and the results show that: compared with a comparison group, the composting time of the test group is shortened, the operation is simple, the fermentation process is not influenced by the rainy day environment, and the prepared organic fertilizer meets the quality standard through detection.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (3)
1. A method for treating organic waste by a closed fermentation bin is characterized by comprising the following steps:
(1) pretreatment of organic waste: squeezing and dehydrating the organic waste, crushing the auxiliary raw materials into particles with the particle size of 10-20mm, fully mixing, adjusting the water content to 45-65%, the C/N mass ratio to 20-35:1 and the pH value to 7-8 to obtain an organic material;
(2) adding a compound leaven into the organic materials, fully stirring and then conveying the organic materials into a closed fermentation bin for composting fermentation;
(3) controlling fermentation reaction conditions: the ventilation system is provided with an air inlet fan at the tail part of the fermentation bin, adopts intermittent ventilation and oxygen supply, and has air flow of 0.2-0.4m3Ventilating for 3 times every day in 3 time periods of morning, afternoon and evening, wherein the ventilation time is 20 min; a heater is arranged at the air inlet fan, hot air is blown into the bin to properly adjust the temperature balance of the whole system, so that the organic material is quickly heated to 50-70 ℃ and is maintained for more than 3 days; the materials are mixed by the rotation and the rolling of the fermentation bin, enter from a feed inlet of the bin body and move to a discharge outlet at the tail end of the reactor along the bin body;
(4) the closed fermentation cabin adopts a first-in first-out material inlet and outlet mode, namely the first-in material is firstly fermented, the later-in material is then fermented, the materials are fed for 1.0-3t and discharged for 0.8-1.7t every day according to the regulation, and the composting period is generally 5-7 days; four temperature thermocouples are axially distributed on the fermentation bin body and are used for detecting and monitoring the specific temperature value of the material in each fermentation stage; when the temperature monitored by the bottom thermocouple is close to the ambient temperature, the fermentation material is completely decomposed, the fermentation process is completed, and discharging is started;
(5) after fermentation is started, the deodorizing fan starts to work and is used for discharging metabolic waste gas of fermentation strains, and the metabolic waste gas is discharged into the filtering tank through a pipeline and is treated together with waste water in a centralized way;
(6) and (3) sequentially performing extrusion granulation, rounding, drying, cooling, screening, detection and packaging on the completely decomposed material to finish the organic waste treatment to obtain a finished product.
2. The method for treating organic waste as claimed in claim 1, wherein the organic waste is at least one of livestock and poultry manure, sludge with high organic matter content, and municipal organic domestic waste, and if the organic waste is a mixture, the organic waste is combined in any proportion; meanwhile, in order to ensure the balanced nutrition ratio of the fermentation raw materials, auxiliary raw materials are added to adjust the carbon-nitrogen ratio and the water content; the auxiliary raw materials comprise at least one of plant straws and wood chips, and if the auxiliary raw materials are a mixture, the organic wastes are combined at any ratio.
3. The method for treating organic waste according to claim 1, wherein the complex leaven is a mixture of mixed microbial inoculum and combined enzyme; wherein the mixed microbial inoculum is a mixture of bacillus cereus, bacillus subtilis, bacillus licheniformis, bacillus megaterium, bacillus circulans, bacillus sphaericus, trichoderma viride, trichoderma reesei and aspergillus niger, and the inoculation amount is 0.2-0.3% of the weight of the organic material; the combined enzyme agent is a mixture of protease 3000-.
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| CN113277897A (en) * | 2021-06-04 | 2021-08-20 | 海南瑞民农业科技有限公司 | Special fertilizer for high yield of coconuts |
| CN113372144A (en) * | 2021-06-28 | 2021-09-10 | 于三全 | Device for manufacturing organic fertilizer by plant straws or organic wastes |
| CN113716999A (en) * | 2021-08-23 | 2021-11-30 | 安徽坤健生物科技有限公司 | Biological treatment process for resource utilization of organic wastes |
| CN114105688A (en) * | 2021-12-23 | 2022-03-01 | 太原理工大学 | Efficient heat-increasing compost self-heating particles and preparation method and application thereof |
| CN114773127A (en) * | 2022-03-14 | 2022-07-22 | 宁夏地丰生物科技有限公司 | Organic fertilizer fermentation process |
| CN114804936A (en) * | 2022-05-10 | 2022-07-29 | 北京沃土天地生物科技股份有限公司 | Biological drying treatment method for organic solid waste |
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| CN115073225A (en) * | 2022-07-20 | 2022-09-20 | 江阴唯农生物科技有限公司 | System for industrially preparing organic fertilizer by using organic wastes and preparation method of organic fertilizer |
| CN115466139A (en) * | 2022-08-24 | 2022-12-13 | 烟台富慧农业科技有限公司 | Fermentation process of high-nitrogen-retention compost |
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| CN114105688A (en) * | 2021-12-23 | 2022-03-01 | 太原理工大学 | Efficient heat-increasing compost self-heating particles and preparation method and application thereof |
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| CN115028491A (en) * | 2022-07-12 | 2022-09-09 | 江阴唯农生物科技有限公司 | System for utilize organic waste industrialization preparation organic fertilizer |
| CN115073225A (en) * | 2022-07-20 | 2022-09-20 | 江阴唯农生物科技有限公司 | System for industrially preparing organic fertilizer by using organic wastes and preparation method of organic fertilizer |
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