Organic fertilizer production process and equipment based on three-source fermentation

Abstract

The invention relates to the technical field of organic fertilizer production, in particular to an organic fertilizer production process and equipment based on three-source fermentation, and the process comprises the following steps: crushing, screening and mixing fermentation raw materials to obtain a fermentation base material; stirring and mixing the fermentation base material, water and the fermentation culture medium additive to obtain a fermentation mixed matrix; stirring the fermentation mixed matrix for fermentation, obtaining the mixed gas production speed of mixed gas generated in the stirring process in the detection period to adjust the fermentation temperature in the fermentation tank, and detecting the microbial concentration to obtain the actual microbial concentration; the fermentation stirring speed is adjusted to meet the fermentation requirement under the condition that the microbial concentration cannot meet the fermentation requirement; whether fermentation is stopped or not is judged by detecting oxygen consumption and fermentation temperature changes, and the fermented mixed substrate is guided into an organic fertilizer separation device to obtain the organic fertilizer. By accurately controlling the particle size of the fermentation base material and adjusting the fermentation temperature, the microbial activity is improved, and the quality of the organic fertilizer is improved.

Description

Technical Field

[0001] The invention relates to the technical field of organic fertilizer production, and in particular to an organic fertilizer production process and equipment based on three-source fermentation. Background Art

[0002] Farmyard manure is a type of organic fertilizer, mainly derived from plants and animals. It includes compost, manure, crop straw, mineral fertilizers, human and animal feces, animal residues, slaughterhouse waste, cake fertilizer (such as rapeseed cake, cottonseed cake, bean cake, etc.), fermented manure, stable manure, biogas manure and green manure. The application of organic fertilizer can not only provide comprehensive nutrition for crops, but also has a long fertilizer effect, can increase and renew soil organic matter, promote microbial reproduction, improve the physical and chemical properties and biological activity of the soil, and is the main nutrient source for green food production.

[0003] Chinese Patent Publication No.: CN118459260A discloses that the production process of granular organic fertilizer includes the following steps: S1, pre-treating the raw materials; S2, fermenting the raw materials; S3, aging the fermented feces; S4, preparing the aged organic fertilizer into powdered biological organic fertilizer. Preferably, S1-1, the raw materials include organic fertilizer and biological organic fertilizer production raw materials, S1-1-1, specifically including various raw materials mainly based on livestock and poultry feces, supplemented by straw, etc., and micro-aerobic rapid organic fertilizer decomposition bacteria; S1-2, mixing the crushed straw, livestock and poultry feces, fermentation bacteria, etc. to a water content of 50%-60% and sending them to the fermentation tank by a forklift; S1-3, and then the trough-type compost turning machine that walks freely on the fermentation tank performs the turning and stirring work.

[0004] It can be seen that the prior art has the following problems: when producing organic fertilizers, there is a lack of precise control of the particle size of the fermentation base material and adjustment of the fermentation temperature. Summary of the invention

[0005] To this end, the present invention provides an organic fertilizer production process and equipment based on three-source fermentation, which is used to overcome the problem of lack of precise control of the particle size of the fermentation base material and adjustment of the fermentation temperature when producing organic fertilizer in the prior art.

[0006] To achieve the above object, the present invention provides an organic fertilizer production process based on three-source fermentation, comprising the following steps: Obtaining fermentation raw materials, crushing, screening and mixing the fermentation raw materials to obtain a fermentation base material; The fermentation base material, water and fermentation medium additive are sent into a stirring tank through a first conveying pipe, and stirred and mixed according to a preset ratio to obtain a fermentation mixed matrix; The fermentation mixed matrix is ​​sent into the fermentation tank for fermentation through the second transmission pipeline, the fermentation mixed matrix is ​​stirred, and the mixed gas production rate of the mixed gas generated during the stirring process within the detection period is obtained; The fermentation temperature in the fermentation tank is adjusted according to the production speed of the mixed gas, and the microbial concentration is detected in real time by a microbial detection device to obtain the actual microbial concentration; If the actual microbial concentration cannot meet the fermentation requirements, adjust the fermentation stirring speed to meet the fermentation requirements; In the case where the fermentation demand is met, the oxygen consumption is detected to obtain the actual oxygen consumption, and the actual oxygen consumption is compared to see whether it is within the standard oxygen consumption range to obtain an oxygen consumption comparison result, and it is determined whether to stop the fermentation in the fermentation tank according to the oxygen consumption comparison result and the fermentation temperature change, and the discharge port of the fermentation tank that has stopped fermentation is opened to introduce the fermented mixed matrix into the organic fertilizer separation device; Determining whether to retain the fermentation mixed matrix, i.e., the seed liquid, according to the weight of the organic fertilizer and the target weight of the organic fertilizer, wherein the target weight of the organic fertilizer is a preset target production weight of the organic fertilizer; Determining the seed solution retention volume according to the fermentation tank volume and the actual microorganism concentration; In the case where the seed liquid is not retained, the organic fertilizer is obtained by operating the organic fertilizer separation device.

[0007] Further, the process of obtaining the fermentation base comprises: The cut fermentation raw materials are screened through a screening device, and the screening holes of the screening device are adjusted according to the preset particle size of the fermentation raw materials.

[0008] Further, the process of obtaining the fermentation mixed matrix includes: The first conveying pipeline comprises a plurality of independent conveying channels, and determines whether to adjust the mixing and stirring speed according to the image feature distribution of the fermentation mixed matrix.

[0009] Further, the process of obtaining the actual microbial concentration includes, The fermentation temperature is collected by a fermentation temperature sensor, the mixed gas production rate is analyzed to obtain a mixed gas analysis result, and the fermentation temperature is adjusted according to the mixed gas analysis result.

[0010] Furthermore, in the case where the actual microbial concentration cannot meet the fermentation requirements, adjusting the fermentation stirring speed to meet the fermentation requirements includes: Whether to adjust the fermentation stirring speed is determined based on the comparison result between the actual microbial concentration and the preset target microbial concentration. When the actual microbial concentration is less than the target microbial concentration, the fermentation stirring speed is accelerated. The target microbial concentration is determined based on the mass of the fermentation mixed matrix in the fermenter.

[0011] Further, the process of judging whether to stop the fermentation in the fermentation tank according to the oxygen consumption comparison result and the fermentation temperature change includes: According to the situation that the fermentation demand is met in the fermentation tank, the initial dissolved oxygen concentration and the current dissolved oxygen concentration are measured by a dissolved oxygen sensor, and the actual oxygen consumption is calculated according to the initial dissolved oxygen concentration and the current dissolved oxygen concentration. When the actual oxygen consumption is within the standard oxygen consumption range and the fermentation temperature remains stable within the preset observation time, it is judged that the fermentation tank stops fermentation.

[0012] Further, the process of opening the discharge port of the fermentation tank where fermentation has stopped and introducing the fermented mixed matrix into the organic fertilizer separation device includes: The mixed gas is discharged through an exhaust valve, and the exhaust speed is adjusted according to the pressure difference between the inside and outside of the fermentation tank to ensure exhaust safety.

[0013] Further, judging whether to retain the fermentation mixed matrix, i.e., the seed liquid, according to the weight of the organic fertilizer and the target weight of the organic fertilizer, wherein the target weight of the organic fertilizer is a preset target production weight of the organic fertilizer, comprises: When the weight of the organic fertilizer is less than the target weight of the organic fertilizer, the fermentation mixed matrix is ​​retained as a seed liquid for further fermentation.

[0014] Further, the process of determining the seed solution retention volume according to the fermentation tank volume and the actual microorganism concentration includes: The first interval of the seed liquid retention volume is determined according to the volume of the fermentation tank, and the target seed liquid retention volume is determined according to the actual microorganism concentration and the seed liquid retention volume interval.

[0015] The present invention also provides an organic fertilizer production device based on three-source fermentation, comprising: The pretreatment tank is located at the head end of the organic fertilizer production equipment, and is provided with a crushing chamber, a screening chamber and a mixing chamber, wherein the crushing chamber is provided with a cutter for cutting the fermentation raw materials; the screening chamber is provided with a screening device for screening the fermentation raw materials that meet the preset particle size; the mixing chamber is provided with a mixer for mixing the fermentation raw materials uniformly; A stirring tank, which is connected to the pretreatment tank via a first delivery pipeline and is used for stirring and fermenting the mixed substrate, and a stirring device is arranged therein; A fermentation tank, which is connected to the stirring tank via a second transmission pipeline, is used for fermenting the mixed substrate, and has a built-in fermentation stirring device capable of adjusting the stirring speed; An organic fertilizer separation device, which is connected to the fermentation tank and is used to separate organic fertilizer; An image acquisition device, which is disposed in the stirring tank and is used to acquire an image of the fermentation mixed matrix; A flow meter, which is arranged at the top of the fermentation tank and is used to detect the production speed of the mixed gas; A microorganism detection device, which is disposed in the fermentation tank and is used to detect the concentration of microorganisms in the fermentation tank; a dissolved oxygen sensor, which is disposed in the fermentation tank and is used to detect the dissolved oxygen concentration in the fermentation tank; A heating device, which is arranged in the fermentation tank and is used to heat the fermentation temperature of the fermentation mixed substrate in the fermentation tank; A cooling device, which is arranged in the fermentation tank and is used to cool the fermentation temperature of the mixed substrate in the fermentation tank; A temperature sensor is disposed in the fermentation tank and is used to detect the fermentation temperature in the fermentation tank; A pressure sensor is disposed in the fermentation tank and is used to detect the pressure in the fermentation tank; An exhaust valve is arranged in the fermentation tank and is used to exhaust the mixed gas.

[0016] Compared with the prior art, the beneficial effect of the present invention is that the quality of the fermentation mixed matrix is ​​ensured by accurately controlling the particle size and composition of the fermentation base material, thereby improving the fermentation efficiency and the production speed of organic fertilizer. Adjusting the fermentation temperature according to the mixed gas production speed helps to maintain the best fermentation environment and promote the growth and metabolism of microorganisms. Real-time detection of microbial concentration and adjustment of fermentation stirring speed can ensure that the microbial concentration meets the fermentation requirements and further improve the fermentation effect. By comparing the actual oxygen consumption and the standard oxygen consumption interval, energy use is optimized, unnecessary energy consumption is reduced, and production costs are reduced. The automated control of the fermentation process reduces manual intervention and improves the stability and reliability of the production process. By accurately controlling the fermentation conditions and microbial concentration, the organic fertilizer product finally obtained has higher quality and more balanced nutrients. According to the comparison between the weight of organic fertilizer and the target weight of organic fertilizer, the retention of seed liquid can be flexibly adjusted to ensure the smooth progress of the production plan. By judging the retained volume of seed liquid, the fermentation tank space can be maximized and resource waste can be reduced. Through effective fermentation process management, the environmental pollution that may be generated during the fermentation process is reduced, which meets the requirements of sustainable development.

[0017] Furthermore, by precise adjustment of the screening device, the particle size of the fermentation raw materials is ensured to be uniform, which is conducive to increasing the contact area of ​​the material during the fermentation process, thereby accelerating the action of microorganisms and improving the fermentation efficiency. The cutting and screening steps make the fermentation raw materials more suitable for the growth of microorganisms, optimize the fermentation conditions, and help improve the quality of organic fertilizers. By returning the raw materials that do not meet the particle size requirements to the cutter for re-cutting, the waste of raw materials is reduced and the overall resource utilization rate is improved. Adding water and fermentation medium additives to the mixer makes the composition of the fermentation base material more uniform, which is conducive to the reproduction and metabolism of microorganisms, thereby improving the fertilizer efficiency of organic fertilizers. The sources of fermentation raw materials are diverse and not specifically limited, making the production process more flexible and able to adapt to organic waste from different sources. By effectively utilizing agricultural and food processing waste, the impact on the environment is reduced and the development of a circular economy is promoted. The automated cutting, screening and mixing processes reduce manual operations, improve production efficiency, and reduce labor costs. Due to the uniform particle size and composition of the fermentation base material, the quality of the organic fertilizer products finally produced is consistent, enhancing market competitiveness.

[0018] Furthermore, through real-time image acquisition and analysis, the uniformity of the fermentation mixed matrix can be accurately determined, so that the mixing and stirring speed can be adjusted as needed to ensure the uniform mixing of the mixture, thereby improving the fermentation efficiency and product quality. The production process is optimized by accurately conveying different components through independent transmission channels, combined with automated stirring speed adjustment, reducing operating errors and waste of raw materials. Due to the improved mixing uniformity, the quality of the fermentation mixed matrix is ​​improved, thereby improving the quality of the final organic fertilizer product. Automatically adjusting the stirring speed helps to maintain the consistency of the fermentation mixed matrix and provides a stable production environment for the fermentation process. By accurately controlling the stirring speed, excessive stirring is avoided, energy consumption is reduced, and production costs are reduced. The application of the automated system reduces direct contact between operators and equipment and improves workplace safety. The image acquisition device provides real-time monitoring, so that problems in the production process can be discovered and solved in a timely manner. The independent transmission channel and automated control system design make equipment maintenance easier and reduce maintenance costs.

[0019] Furthermore, by real-time monitoring of the mixed gas production rate and adjusting the fermentation temperature accordingly, the fermentation environment can be controlled more accurately to ensure that the microorganisms grow and metabolize at the optimal temperature. Keeping the fermentation temperature within an appropriate range helps to increase the activity of the microorganisms, thereby accelerating the fermentation rate, increasing the substrate conversion rate, and improving the fermentation efficiency. Automatically adjusting the cooling and heating devices according to the mixed gas production rate can effectively reduce energy waste and reduce production costs. Real-time monitoring and adjustment help reduce fluctuations in the fermentation process and improve the stability and repeatability of the production process. By controlling the fermentation temperature, excessive or insufficient fermentation can be avoided to ensure the consistency of the quality of organic fertilizer. Stable fermentation temperature helps to produce products with higher quality and more consistent performance to meet the needs of the market and consumers. The control strategy can be adjusted according to different fermentation substrates and fermentation stages, with strong adaptability and suitable for a variety of fermentation scenarios.

[0020] Furthermore, real-time monitoring and adjustment of microbial concentration helps maintain optimal conditions for the fermentation process, improves the conversion rate of the fermentation mixed matrix, and thus improves the overall fermentation efficiency. By precisely controlling the microbial concentration, the quality and consistency of the organic fertilizer can be ensured, and the differences between batches can be reduced. Adjusting the stirring speed according to the actual microbial concentration helps avoid over-stirring, reduces energy consumption, and improves resource utilization efficiency. Timely adjustment of the stirring speed helps avoid stagnation or failure in the fermentation process and reduces downtime caused by improper adjustment.

[0021] Furthermore, by real-time monitoring and adjustment of oxygen consumption, it is ensured that microorganisms carry out metabolic activities under optimal oxygen conditions, thereby improving fermentation efficiency and product yield. Accurately controlling oxygen consumption and temperature during the fermentation process helps stabilize product quality and reduce batch differences. By accurately calculating the actual oxygen consumption, excessive ventilation can be avoided, energy consumption can be reduced, and production costs can be reduced. By monitoring oxygen consumption and temperature changes, abnormal conditions in the fermentation process can be discovered in time, and alarms can be issued through the early warning module to prevent fermentation failure. By accurately controlling fermentation conditions, the fermentation cycle can be shortened and the utilization rate of production equipment can be improved. Reasonable oxygen consumption control helps reduce harmful gas emissions that may be generated during the fermentation process and reduce the impact on the environment.

[0022] Furthermore, by precisely controlling the exhaust speed, the substrate in the tank can be effectively prevented from splashing out or equipment damage caused by excessive pressure difference, thereby ensuring the safety of the fermentation process. A smooth exhaust process helps to reduce the loss of fermentation substrate and maintain the integrity and quality of organic fertilizer. By real-time monitoring and adjusting the pressure difference between the inside and outside of the fermenter, the discharging process can be completed quickly and effectively, thereby improving overall production efficiency. Controlling the exhaust speed helps to maintain a stable environment in the fermenter and reduce the impact on the quality of the fermented mixed substrate, thereby ensuring the quality of the final organic fertilizer product. Reducing equipment shock caused by pressure fluctuations helps to extend the service life of the fermenter and its related equipment. As the exhaust process is smoother, equipment maintenance and cleaning become easier and more efficient.

[0023] Further, it is ensured that the production of organic fertilizer reaches the preset target weight, and the fermentation efficiency is improved by the retained seed liquid, and the product quality is stabilized. By comparing the actual organic fertilizer weight with the target organic fertilizer weight, it can be ensured that the preset organic fertilizer output in the production plan is met, thereby meeting market demand. According to the comparison result between the actual organic fertilizer weight and the target organic fertilizer weight, it is flexibly adjusted whether to retain the seed liquid, which can better adapt to changes in the production process. When the actual organic fertilizer weight is less than the target organic fertilizer weight, the retained seed liquid can be used for the next round of fermentation, reducing the dependence on new strains and saving resources. The retained seed liquid contains active microorganisms, which can ensure the stability of the fermentation process and the quality of the organic fertilizer. By reusing the seed liquid, the cost of purchasing new strains or inocula is reduced, and the overall production cost is reduced. When the actual output reaches or exceeds the target, not retaining the seed liquid can avoid unnecessary storage and processing and reduce waste generation.

[0024] Furthermore, by precisely controlling the retention volume of the seed liquid, it is ensured that the number of microorganisms inoculated into the fermentation tank is appropriate, thereby optimizing the fermentation process and improving production efficiency. Adjusting the seed liquid retention volume according to the actual microbial concentration helps to maintain the stability and consistency of the fermentation process and reduce batch differences. By adjusting the seed liquid retention volume, the microbial density in the fermentation tank can be better controlled, which helps to improve the yield and quality of organic fertilizer. Reasonable control of the retention volume of the seed liquid can avoid excessive use of microbial seed liquid, reduce the waste of raw materials and energy, and reduce production costs. By ensuring that the microbial concentration in the fermentation tank is within an appropriate range, the fermentation process can be better controlled, thereby improving the quality and purity of the final product. Reasonable control of the seed liquid retention volume helps to prevent excessive growth or contamination problems that may occur during the fermentation process and improve the safety of the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Flow chart of the organic fertilizer production process based on three-source fermentation in this embodiment; Figure 2Flow chart of the fermentation base material production process of the organic fertilizer production process based on three-source fermentation in this embodiment; Figure 3 The present invention is a flow chart of the fermentation stop determination process of the organic fertilizer production process based on three-source fermentation in the present embodiment; Figure 4 Schematic diagram of the structure of the organic fertilizer production equipment based on three-source fermentation in this embodiment. DETAILED DESCRIPTION

[0026] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with 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.

[0027] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0028] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0029] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] See also Figure 1-Figure 4 As shown, Figure 1 Flow chart of the organic fertilizer production process based on three-source fermentation in this embodiment; Figure 2 Flow chart of the fermentation base material production process of the organic fertilizer production process based on three-source fermentation in this embodiment; Figure 3 The present invention is a flow chart of the fermentation stop determination process of the organic fertilizer production process based on three-source fermentation in the present embodiment; Figure 4 Schematic diagram of the structure of the organic fertilizer production equipment based on three-source fermentation in this embodiment.

[0031] This embodiment provides an organic fertilizer production process based on three-source fermentation, comprising the following steps: Step S1, obtaining fermentation raw materials, crushing, screening and mixing the fermentation raw materials to obtain a fermentation base material; Step S2, delivering the fermentation base material, water and fermentation medium additive into a stirring tank through a first delivery pipe, and stirring and mixing them according to a preset ratio to obtain a fermentation mixed matrix; Step S3, delivering the fermentation mixed matrix to the fermentation tank through the second delivery pipeline for fermentation, stirring the fermentation mixed matrix, and obtaining the mixed gas production rate of the mixed gas generated during the stirring process within the detection period; Step S4, adjusting the fermentation temperature in the fermentation tank according to the mixed gas production speed, and detecting the microbial concentration in real time by a microbial detection device to obtain an actual microbial concentration; Step S5, if the actual microorganism concentration cannot meet the fermentation demand, adjust the fermentation stirring speed to meet the fermentation demand; Step S6, in the case where the fermentation demand is met, the oxygen consumption is detected to obtain the actual oxygen consumption, and the actual oxygen consumption is compared to see whether it is within the standard oxygen consumption range to obtain an oxygen consumption comparison result, and according to the oxygen consumption comparison result and the fermentation temperature change, it is determined whether to stop the fermentation in the fermentation tank, and the discharge port of the fermentation tank where the fermentation is stopped is opened to introduce the fermented mixed substrate after the fermentation is completed into the organic fertilizer separation device; Step S7, judging whether to retain the fermentation mixed matrix, i.e., the seed liquid, according to the weight of the organic fertilizer and the target weight of the organic fertilizer, wherein the target weight of the organic fertilizer is a preset target production weight of the organic fertilizer; Step S8, determining the seed liquid retention volume according to the fermentation tank volume and the actual microorganism concentration; Step S9, when the seed liquid is not retained, the organic fertilizer separation device is operated to obtain organic fertilizer.

[0032] By precisely controlling the particle size and composition of the fermentation base material, the quality of the fermentation mixed matrix is ​​ensured, thereby improving the fermentation efficiency and the production speed of organic fertilizer. Adjusting the fermentation temperature according to the production speed of the mixed gas helps to maintain the optimal fermentation environment and promote the growth and metabolism of microorganisms. Real-time detection of microbial concentration and adjustment of the fermentation stirring speed can ensure that the microbial concentration meets the fermentation requirements and further improve the fermentation effect. By comparing the actual oxygen consumption and the standard oxygen consumption range, energy use is optimized, unnecessary energy consumption is reduced, and production costs are reduced. Automated control of the fermentation process reduces manual intervention and improves the stability and reliability of the production process. By precisely controlling the fermentation conditions and microbial concentration, the resulting organic fertilizer product is of higher quality and more balanced in nutrients. According to the comparison between the weight of the organic fertilizer and the target weight of the organic fertilizer, the retention of the seed liquid can be flexibly adjusted to ensure the smooth progress of the production plan. Judging the retained volume of the seed liquid can maximize the use of the fermentation tank space and reduce resource waste. Through effective fermentation process management, the environmental pollution that may be generated during the fermentation process is reduced, which meets the requirements of sustainable development.

[0033] The fermentation base material production process comprises the following steps: Step S10, collecting organic waste from farms, breeding farms or organic waste treatment centers to obtain fermentation raw materials; Step S11, feeding the fermentation raw materials into a crushing chamber, wherein the crushing chamber contains a cutter to cut the raw materials into smaller pieces; Step S12, screening the raw material cut into smaller pieces through a screening device to obtain a fermentation raw material with a preset fermentation raw material particle size; Step S13, the fermentation raw materials that meet the preset particle size after screening are mixed evenly by a mixer to obtain a fermentation base material.

[0034] Specifically, the process of obtaining the fermentation base material includes: The cut fermentation raw materials are screened through a screening device, and the screening holes of the screening device are adjusted according to the preset particle size of the fermentation raw materials.

[0035] Obtain fermentation raw materials and collect organic waste from farms, breeding farms or organic waste treatment centers, such as livestock and poultry manure, crop straw, food processing waste, etc. as fermentation raw materials. This embodiment does not specifically limit the fermentation raw materials.

[0036] The collected fermentation raw materials are sent to the crushing chamber for crushing. The crushing chamber contains a cutter to cut the raw materials into smaller fragments for subsequent screening and mixing.

[0037] The cut fermentation raw materials are sent to the screening device, and the size of the screening holes is adjusted according to the preset particle size of the fermentation raw materials. If the particle size of the fermentation raw material is required to be 20 mm, the size of the screening hole is adjusted to 21 mm to 23 mm. The specific size of the screening hole is determined according to the actual particle size distribution of the raw material and the particle size requirements; The screened raw material particles are sent back to the cutting machine for further cutting; The fermentation raw materials that meet the particle size requirements after screening are sent to a mixer, wherein the mixer may be a horizontal mixer or a conical mixer, which is used to mix the fermentation raw materials uniformly. This embodiment does not specifically limit the mixer; In the mixer, the screened fermentation raw materials, water and fermentation medium additives are mixed to obtain a uniform fermentation base, wherein the fermentation medium additives include nutrient salts, vitamins, pH regulators and fermentation promoters.

[0038] Through the precise adjustment of the screening device, the particle size of the fermentation raw materials is ensured to be uniform, which is conducive to increasing the contact area of ​​the substances during the fermentation process, thereby accelerating the action of microorganisms and improving the fermentation efficiency. The cutting and screening steps make the fermentation raw materials more suitable for the growth of microorganisms, optimize the fermentation conditions, and help improve the quality of organic fertilizers. By returning the raw materials that do not meet the particle size requirements to the cutter for re-cutting, the waste of raw materials is reduced and the overall resource utilization rate is improved. Adding water and fermentation medium additives to the mixer makes the composition of the fermentation base material more uniform, which is conducive to the reproduction and metabolism of microorganisms, thereby improving the fertilizer efficiency of organic fertilizers. The sources of fermentation raw materials are diverse and not specifically limited, making the production process more flexible and able to adapt to organic waste from different sources. By effectively utilizing agricultural and food processing waste, the impact on the environment is reduced and the development of a circular economy is promoted. The automated cutting, screening and mixing processes reduce manual operations, improve production efficiency and reduce labor costs. Due to the uniform particle size and composition of the fermentation base material, the quality of the organic fertilizer products produced in the end is consistent, enhancing market competitiveness.

[0039] Specifically, the process of obtaining the fermentation mixed matrix includes: The first conveying pipeline comprises a plurality of independent conveying channels, and determines whether to adjust the mixing and stirring speed according to the image feature distribution of the fermentation mixed matrix.

[0040] According to production requirements, fermentation base, water and fermentation medium additives are prepared, wherein the fermentation medium additives include nutrient salts, vitamins, pH regulators and fermentation promoters. The fermentation base material, water and fermentation medium additives are respectively transported to the stirring tank through different independent transport channels of the first transport pipeline. The first transport pipeline is designed with multiple independent transport channels, and each transport channel is responsible for transporting different components.

[0041] In the stirring tank, the fermentation base material, water and fermentation medium additives begin to mix according to a preset ratio. The stirring tank is equipped with a stirring device for fully mixing different components. During the mixing process, an image acquisition device is used to capture the image feature distribution of the fermentation mixed matrix in real time. The image acquisition device includes a camera and an image analysis module. According to the analysis result of the image analysis module on the image feature distribution of the fermentation mixed matrix, the uniformity of the mixture is judged. If the fermentation mixed matrix is ​​not mixed evenly, the image analysis module sends a signal to the control system of the stirring tank, and the control system automatically adjusts the mixing speed of the stirring tank according to the received signal. For example, if the fermentation mixed matrix shows stratification or agglomeration, the stirring control module increases the mixing and stirring speed to obtain a better mixing effect, wherein the image analysis module obtains the actual proportion of the fermentation mixed matrix agglomerates according to the distribution of the fermentation mixed matrix image characteristics. When the actual proportion of fermentation mixed matrix agglomerates is greater than the standard proportion of fermentation mixed matrix agglomerates, the mixing speed is increased to the target mixing speed, and the target mixing speed is determined according to the initial mixing speed and the actual proportion of fermentation mixed matrix agglomerates, wherein the actual proportion of fermentation mixed matrix agglomerates is positively correlated with the target mixing speed; The positive correlation ratio between the actual proportion of fermentation mixed matrix aggregates and the target mixing speed is determined by a preset ratio influence compensation parameter; The initial mixing speed is a mixing speed preset according to historical mixing speed data; When the actual proportion of the fermentation mixed matrix aggregates is less than or equal to the standard proportion of the fermentation mixed matrix aggregates, the stirring tank stops stirring. At this time, the fermentation mixed matrix is ​​prepared and sent to the fermentation tank for fermentation through the second transmission pipeline.

[0042] Through real-time image acquisition and analysis, the uniformity of the fermentation mixed matrix can be accurately judged, so that the mixing speed can be adjusted as needed to ensure the uniform mixing of the mixture, thereby improving the fermentation efficiency and product quality. The production process is optimized and operational errors and raw material waste are reduced by accurately delivering different components through independent transmission channels and combining with automated stirring speed adjustment. Due to the improved mixing uniformity, the quality of the fermentation mixed matrix is ​​improved, thereby improving the quality of the final organic fertilizer product. Automatic adjustment of the stirring speed helps to maintain the consistency of the fermentation mixed matrix and provides a stable production environment for the fermentation process. By accurately controlling the stirring speed, excessive stirring is avoided, energy consumption is reduced, and production costs are reduced. The application of the automated system reduces direct contact between operators and equipment and improves workplace safety. The image acquisition device provides real-time monitoring, so that problems in the production process can be discovered and solved in a timely manner. The independent transmission channel and automated control system design make equipment maintenance easier and reduce maintenance costs.

[0043] Specifically, the process of obtaining the actual microbial concentration includes: The fermentation temperature is collected by a fermentation temperature sensor, the mixed gas production rate is analyzed to obtain a mixed gas analysis result, and the fermentation temperature is adjusted according to the mixed gas analysis result.

[0044] The production speed of the mixed gas is monitored by the gas flow meter installed on the top of the fermentation tank. The flow meter records the flow data of the mixed gas. The control system analyzes the production speed data of the mixed gas to obtain the analysis results of the mixed gas. If the mixed gas production speed is greater than the theoretical mixed gas production speed, the cooling device in the fermenter is controlled to be turned on, and the mixed gas production speed in the fermenter is continuously monitored; when the mixed gas production speed is equal to the theoretical mixed gas production speed, the cooling device in the fermenter is controlled to be turned off, and the fermentation temperature is detected in real time; wherein the theoretical mixed gas production speed is determined according to the amount of the fermentation mixed substrate; If the mixed gas production speed is lower than the theoretical mixed gas production speed, the heating device in the fermentation tank is controlled to heat with the initial heating power, and the mixed gas production speed in the fermentation tank is continuously monitored. When the mixed gas production speed is equal to the theoretical mixed gas production speed, the heating device in the fermentation tank is controlled to be turned off, and the fermentation temperature is detected in real time to obtain the real-time fermentation temperature. If the real-time fermentation temperature is lower than the standard fermentation temperature, the heating device is turned on again to heat with the first heating power. The first heating power is determined according to the ratio of the initial heating power multiplied by 1 minus the difference between the standard fermentation temperature and the real-time fermentation temperature to the standard fermentation temperature.

[0045] By monitoring the mixed gas production rate in real time and adjusting the fermentation temperature accordingly, the fermentation environment can be controlled more accurately to ensure that the microorganisms grow and metabolize at the optimal temperature. Keeping the fermentation temperature within the appropriate range helps to increase the activity of microorganisms, thereby accelerating the fermentation rate, increasing the substrate conversion rate, and improving the fermentation efficiency. Automatically adjusting the cooling and heating devices according to the mixed gas production rate can effectively reduce energy waste and reduce production costs. Real-time monitoring and adjustment can help reduce fluctuations in the fermentation process and improve the stability and repeatability of the production process. By controlling the fermentation temperature, excessive or insufficient fermentation can be avoided to ensure the consistency of the quality of organic fertilizer. Stable fermentation temperature helps to produce products with higher quality and more consistent performance to meet the needs of the market and consumers. The control strategy can be adjusted according to different fermentation substrates and fermentation stages, with strong adaptability and suitable for a variety of fermentation scenarios.

[0046] Specifically, when the actual microbial concentration cannot meet the fermentation requirements, the fermentation stirring speed is adjusted to meet the fermentation requirements, including: Whether to adjust the fermentation stirring speed is determined based on the comparison result between the actual microbial concentration and the preset target microbial concentration. When the actual microbial concentration is less than the target microbial concentration, the stirring speed of the fermentation stirring device is increased. The target microbial concentration is determined based on the mass of the fermentation mixed matrix in the fermenter.

[0047] The target microbial concentration is determined based on the quality of the fermentation mixed matrix in the fermenter and the expected fermentation efficiency. At the beginning of the fermentation process, microorganisms are inoculated into the fermentation mixed matrix, and the fermenter starts working. The microbial concentration in the fermenter is monitored in real time by a microbial detection device, and real-time data of microbial concentration is collected to obtain the actual microbial concentration, which is then compared with the preset target microbial concentration. When the actual microorganism concentration is less than the target microorganism concentration, the fermentation stirring speed of the fermenter is increased, wherein the increase in the fermentation stirring speed is determined according to the difference between the actual microorganism concentration and the target microorganism concentration. For example, when the actual microbial concentration is 80% of the target microbial concentration, the initial fermentation stirring speed of the fermentation stirring device is increased by 10%, wherein the initial fermentation stirring speed is determined based on historical fermentation stirring speed data.

[0048] Real-time monitoring and adjustment of microbial concentration helps maintain optimal conditions for the fermentation process, improves the conversion rate of the fermentation mixed matrix, and thus improves the overall fermentation efficiency. By precisely controlling the microbial concentration, the quality and consistency of organic fertilizers can be ensured, and the differences between batches can be reduced. Adjusting the stirring speed according to the actual microbial concentration helps avoid over-stirring, reduces energy consumption, and improves resource utilization efficiency. Timely adjustment of the stirring speed helps avoid stagnation or failure in the fermentation process and reduces downtime caused by improper adjustment.

[0049] Specifically, the process of determining whether to stop fermentation in the fermentation tank according to the oxygen consumption comparison result and the fermentation temperature change includes: According to the situation that the fermentation demand is met in the fermentation tank, the initial dissolved oxygen concentration and the current dissolved oxygen concentration are measured by a dissolved oxygen sensor, and the actual oxygen consumption is calculated according to the initial dissolved oxygen concentration and the current dissolved oxygen concentration. When the actual oxygen consumption is within the standard oxygen consumption range and the fermentation temperature remains stable within the preset observation time, it is judged that the fermentation tank stops fermentation.

[0050] The fermentation process in the fermenter begins. Microorganisms grow in the fermentation mixed matrix and carry out metabolic activities to produce mixed gases. At this time, the dissolved oxygen concentration in the fermenter is monitored in real time through the dissolved oxygen sensor. At the beginning of fermentation, the initial dissolved oxygen concentration is recorded. The dissolved oxygen sensor detects the dissolved oxygen concentration in the fermentation tank in real time to obtain the current dissolved oxygen concentration. The oxygen consumption is calculated based on the initial dissolved oxygen concentration and the current dissolved oxygen concentration to obtain the actual oxygen consumption. The actual oxygen consumption is compared with the first standard oxygen consumption and the second standard oxygen consumption in the standard oxygen consumption interval. When the actual oxygen consumption is less than the first standard oxygen consumption, the fermentation tank is controlled to continue fermentation; In the case where the actual oxygen consumption is greater than or equal to the first standard oxygen consumption and less than or equal to the second standard oxygen consumption, the fermentation temperature fluctuation within the preset observation time is detected to determine whether the fermentation temperature fluctuation is stable; In the case where the actual oxygen consumption is greater than the second standard oxygen consumption, the early warning module sends an alarm signal to control the early warning module to send an alarm signal; The actual oxygen consumption is equal to the product of the absolute value of the difference between the initial dissolved oxygen concentration and the current dissolved oxygen concentration and the volume of the fermenter. The fermentation temperature in the fermentation tank is monitored by a temperature sensor, and the fermentation temperature change is recorded to generate a fermentation temperature change curve. The fermentation temperature change curve is divided into several sections according to the inflection point to obtain several interval fermentation temperature fluctuation intervals, and the interval fermentation temperature fluctuation range is analyzed. When the interval fermentation temperature fluctuation range is less than or equal to the preset fermentation temperature fluctuation range, and the interval fermentation temperature is maintained within the preset fermentation temperature fluctuation range within the preset observation time, it is judged that the fermentation process has been completed and the fermentation of the fermentation tank is stopped; when the interval fermentation temperature fluctuation range is greater than the preset fermentation temperature fluctuation range, the early warning module sends an alarm signal; For example, assuming the initial dissolved oxygen concentration is 8 mg / L and the current dissolved oxygen concentration is 2 mg / L, the actual oxygen consumption is 6 mg / L. If the standard oxygen consumption range is 4-8 mg / L and the fermentation temperature does not fluctuate by more than ±0.5°C in the past 2 hours, it can be judged that the fermentation tank has stopped fermentation.

[0051] By real-time monitoring and adjusting oxygen consumption, we can ensure that microorganisms carry out metabolic activities under optimal oxygen conditions, thereby improving fermentation efficiency and product yield. Accurately controlling oxygen consumption and temperature during the fermentation process helps stabilize product quality and reduce batch-to-batch differences. By accurately calculating actual oxygen consumption, we can avoid excessive ventilation, reduce energy consumption, and reduce production costs. By monitoring oxygen consumption and temperature changes, we can promptly detect abnormal conditions in the fermentation process, and alarm through the early warning module to prevent fermentation failure. By accurately controlling fermentation conditions, we can shorten the fermentation cycle and improve the utilization rate of production equipment. Reasonable oxygen consumption control helps reduce harmful gas emissions that may be generated during the fermentation process and reduce the impact on the environment.

[0052] Specifically, the process of opening the discharge port of the fermentation tank where fermentation has stopped and introducing the fermented mixed substrate after fermentation into the organic fertilizer separation device includes: The mixed gas is discharged through an exhaust valve, and the exhaust speed is adjusted according to the pressure difference between the inside and outside of the fermentation tank to ensure exhaust safety.

[0053] Use a pressure sensor to detect the pressure inside the fermenter to obtain the initial pressure inside the fermenter. At the same time, detect the ambient pressure outside the fermenter to obtain the external pressure of the fermenter, and calculate the pressure difference between the inside and outside of the fermenter. The exhaust speed is equal to the product of the pressure difference between the inside and outside of the fermentation tank and the compensation parameter of the effect of the pressure difference between the inside and outside of the fermentation tank on the exhaust speed; Keep the gas discharge rate matching the pressure difference inside and outside the tank to ensure the smooth exhaust process. When the pressure inside the tank drops to close to the ambient pressure, open the discharge port and introduce the fermented mixed matrix into the organic fertilizer separation device for the next step of solid-liquid separation.

[0054] By precisely controlling the exhaust speed, the substrate in the tank can be effectively prevented from splashing out or equipment damage caused by excessive pressure difference, ensuring the safety of the fermentation process. A smooth exhaust process helps reduce the loss of fermentation substrate and maintain the integrity and quality of organic fertilizer. By real-time monitoring and adjusting the pressure difference between the inside and outside of the fermenter, the discharge process can be completed quickly and effectively to improve overall production efficiency. Controlling the exhaust speed helps maintain a stable environment in the fermenter and reduce the impact on the quality of the fermented mixed substrate, thereby ensuring the quality of the final organic fertilizer product. Reducing equipment shock caused by pressure fluctuations helps to extend the service life of the fermenter and its related equipment. As the exhaust process is smoother, equipment maintenance and cleaning become easier and more efficient.

[0055] Specifically, judging whether to retain the fermentation mixed matrix, i.e., the seed liquid, according to the weight of the organic fertilizer and the target weight of the organic fertilizer, wherein the target weight of the organic fertilizer is a preset target production weight of the organic fertilizer, comprises: When the weight of the organic fertilizer is less than the target weight of the organic fertilizer, the fermentation mixed matrix is ​​retained as a seed liquid for further fermentation.

[0056] In the organic fertilizer production plan, a target organic fertilizer weight is preset, for example, 10 tons.

[0057] After the fermentation process in the fermentation tank is completed, the fermentation mixed matrix is ​​introduced into the organic fertilizer separation device through the aforementioned steps. In the organic fertilizer separation device, the fermentation mixed matrix is ​​separated into solid and liquid to extract the organic fertilizer. The separated organic fertilizer is weighed using a weighing device to obtain the actual weight of the organic fertilizer.

[0058] Compare the actual organic fertilizer weight with the preset target organic fertilizer weight. If the actual organic fertilizer weight is greater than or equal to the target organic fertilizer weight, the seed liquid is not retained. In the case where the seed liquid is not retained, the organic fertilizer separation device is operated to obtain organic fertilizer; If the actual organic fertilizer weight is less than the target organic fertilizer weight, the seed solution is retained; The retained seed liquid is mixed with a new fermentation mixed matrix according to a preset ratio and put back into the fermentation tank for a new round of fermentation.

[0059] Ensure that the production of organic fertilizer reaches the preset target weight, and at the same time, the fermentation efficiency is improved and the product quality is stabilized by retaining the seed liquid. By comparing the actual organic fertilizer weight with the target organic fertilizer weight, it can be ensured that the preset organic fertilizer output in the production plan is met, thereby meeting market demand. According to the comparison results of the actual organic fertilizer weight and the target organic fertilizer weight, it is flexible to adjust whether to retain the seed liquid, which can better adapt to changes in the production process. When the actual organic fertilizer weight is less than the target organic fertilizer weight, the retained seed liquid can be used for the next round of fermentation, reducing the dependence on new strains and saving resources. The retained seed liquid contains active microorganisms, which can ensure the stability of the fermentation process and the quality of the organic fertilizer. By reusing the seed liquid, the cost of purchasing new strains or inocula is reduced, and the overall production cost is reduced. When the actual output reaches or exceeds the target, not retaining the seed liquid can avoid unnecessary storage and treatment and reduce waste generation.

[0060] Specifically, the process of determining the seed liquid retention volume according to the fermentation tank volume and the actual microorganism concentration includes: The first interval of the seed liquid retention volume is determined according to the volume of the fermentation tank, and the target seed liquid retention volume is determined according to the actual microorganism concentration and the seed liquid retention volume interval.

[0061] Measure the volume of the fermenter, assuming the volume of the fermenter is 10 cubic meters.

[0062] According to the volume of the fermentation tank, a seed liquid retention volume interval is formulated. The seed liquid retention volume interval is determined according to experimental data. For example, for a 10 cubic meter fermentation tank, the seed liquid retention volume interval is set to 0.5m³ to 1m³. After the fermentation is completed, the microbial concentration is analyzed and measured to obtain the actual microbial concentration. If the actual microbial concentration is less than the standard microbial concentration, the seed liquid retention volume is increased to obtain a seed liquid retention target volume, wherein the seed liquid retention target volume is determined by multiplying the absolute value of the difference between the actual microbial concentration and the standard microbial concentration by the seed liquid retention volume and the compensation parameter affecting the seed liquid retention target volume according to the absolute value of the difference between the actual microbial concentration and the standard microbial concentration; If the actual microbial concentration is equal to the standard microbial concentration, there is no need to adjust the seed solution retention volume.

[0063] By precisely controlling the retention volume of the seed solution, the appropriate number of microorganisms inoculated into the fermenter is ensured, thereby optimizing the fermentation process and improving production efficiency. Adjusting the seed solution retention volume according to the actual microbial concentration helps maintain the stability and consistency of the fermentation process and reduce batch-to-batch differences. By adjusting the seed solution retention volume, the microbial density in the fermenter can be better controlled, which helps to improve the yield and quality of organic fertilizer. Reasonable control of the seed solution retention volume can avoid excessive use of microbial seed solution, reduce the waste of raw materials and energy, and reduce production costs. By ensuring that the microbial concentration in the fermenter is within an appropriate range, the fermentation process can be better controlled, thereby improving the quality and purity of the final product. Reasonable control of the seed solution retention volume helps prevent excessive growth or contamination problems that may occur during the fermentation process and improve the safety of the production process.

[0064] This embodiment also provides an organic fertilizer production device based on three-source fermentation, comprising: The pretreatment tank 1 is located at the head end of the organic fertilizer production equipment, and is provided with a crushing chamber 101, a screening chamber 102 and a mixing chamber 103, wherein the crushing chamber is provided with a cutter 1011 for cutting the fermentation raw materials; the screening chamber is provided with a screening device 1021 for screening the fermentation raw materials with a composite preset particle size; the mixing chamber is provided with a mixer 1031 for mixing the fermentation raw materials uniformly; A stirring tank 2, which is connected to the pretreatment tank via a first conveying pipe 3 and is used for stirring and fermenting the mixed substrate, and a stirring device 201 is arranged therein; A fermentation tank 4, which is connected to the stirring tank via a second conveying pipe 5, is used for fermenting the mixed substrate, and has a built-in fermentation stirring device 409 capable of adjusting the stirring speed; An organic fertilizer separation device 6, which is connected to the fermentation tank and is used to separate organic fertilizer; An image acquisition device 202, which is disposed in the stirring tank and is used to acquire an image of the fermentation mixed matrix; A flow meter 401, which is disposed on the top of the fermentation tank and is used to detect the production speed of the mixed gas; A microorganism detection device 402, which is disposed in the fermentation tank and is used to detect the concentration of microorganisms in the fermentation tank; A dissolved oxygen sensor 406 is disposed in the fermentation tank and is used to detect the dissolved oxygen concentration in the fermentation tank; A heating device 407, which is disposed in the fermentation tank and is used to heat the fermentation temperature of the fermentation mixed substrate in the fermentation tank; A cooling device 408, which is disposed in the fermentation tank and is used to cool the fermentation temperature of the mixed substrate in the fermentation tank; A temperature sensor 403 is disposed in the fermentation tank and is used to detect the fermentation temperature in the fermentation tank; A pressure sensor 404 is disposed in the fermentation tank and is used to detect the pressure in the fermentation tank; The exhaust valve 405 is disposed in the fermentation tank and is used to exhaust the mixed gas.

[0065] The operation process of the organic fertilizer production equipment is that the fermentation raw materials pass through the crushing chamber, screening chamber and mixing chamber of the pretreatment tank to obtain the fermentation base material, the fermentation base material is sent to the stirring tank through the first transmission pipe, the stirring device in the stirring tank stirs the fermentation base material evenly to obtain the fermentation mixed matrix, which is sent to the fermentation tank through the second transmission pipe for fermentation, and the fermented fermentation mixed matrix is ​​separated by the organic fertilizer separation device to obtain organic fertilizer.

[0066] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An organic fertilizer production process based on three-source fermentation, characterized in that: The following steps are included: Obtaining fermentation raw materials, crushing, screening and mixing the fermentation raw materials to obtain a fermentation base material; The fermentation base material, water and fermentation medium additive are sent into a stirring tank through a first conveying pipe, and stirred and mixed according to a preset ratio to obtain a fermentation mixed matrix; The fermentation mixed matrix is ​​sent into the fermentation tank for fermentation through the second transmission pipeline, the fermentation mixed matrix is ​​stirred, and the mixed gas production rate of the mixed gas generated during the stirring process within the detection period is obtained; The fermentation temperature in the fermentation tank is adjusted according to the production speed of the mixed gas, and the microbial concentration is detected in real time by a microbial detection device to obtain the actual microbial concentration; If the actual microbial concentration cannot meet the fermentation requirements, adjust the fermentation stirring speed to meet the fermentation requirements; In the case where the fermentation demand is met, the oxygen consumption is detected to obtain the actual oxygen consumption, and the actual oxygen consumption is compared to see whether it is within the standard oxygen consumption range to obtain an oxygen consumption comparison result, and it is determined whether to stop the fermentation in the fermentation tank according to the oxygen consumption comparison result and the fermentation temperature change, and the discharge port of the fermentation tank that has stopped fermentation is opened to introduce the fermented mixed matrix into the organic fertilizer separation device; Determining whether to retain the fermentation mixed matrix, i.e., the seed liquid, according to the weight of the organic fertilizer and the target weight of the organic fertilizer, wherein the target weight of the organic fertilizer is a preset target production weight of the organic fertilizer; Determining the seed solution retention volume according to the fermentation tank volume and the actual microorganism concentration; In the case where the seed liquid is not retained, the organic fertilizer is obtained by operating the organic fertilizer separation device.

2. The organic fertilizer production process based on three-source fermentation according to claim 1, characterized in that, The process of obtaining the fermentation base includes: The cut fermentation raw materials are screened through a screening device, and the screening holes of the screening device are adjusted according to the preset particle size of the fermentation raw materials.

3. The organic fertilizer production process based on three-source fermentation according to claim 2, characterized in that, The process of obtaining the fermentation mixed matrix includes: The first conveying pipeline comprises a plurality of independent conveying channels, and determines whether to adjust the mixing and stirring speed according to the image feature distribution of the fermentation mixed matrix.

4. The organic fertilizer production process based on three-source fermentation according to claim 3, characterized in that, The process of obtaining the actual microbial concentration includes: The fermentation temperature is collected by a fermentation temperature sensor, the mixed gas production rate is analyzed to obtain a mixed gas analysis result, and the fermentation temperature is adjusted according to the mixed gas analysis result.

5. The organic fertilizer production process based on three-source fermentation according to claim 4, characterized in that, When the actual microbial concentration cannot meet the fermentation requirements, the fermentation stirring speed is adjusted to meet the fermentation requirements, including: Whether to adjust the fermentation stirring speed is determined based on the comparison result between the actual microbial concentration and the preset target microbial concentration. When the actual microbial concentration is less than the target microbial concentration, the fermentation stirring speed is accelerated. The target microbial concentration is determined based on the mass of the fermentation mixed matrix in the fermenter.

6. The organic fertilizer production process based on three-source fermentation according to claim 5, characterized in that, The process of judging whether to stop the fermentation in the fermentation tank according to the oxygen consumption comparison result and the fermentation temperature change includes: According to the situation that the fermentation demand is met in the fermentation tank, the initial dissolved oxygen concentration and the current dissolved oxygen concentration are measured by a dissolved oxygen sensor, and the actual oxygen consumption is calculated according to the initial dissolved oxygen concentration and the current dissolved oxygen concentration. When the actual oxygen consumption is within the standard oxygen consumption range and the fermentation temperature remains stable within the preset observation time, it is judged that the fermentation tank stops fermentation.

7. The organic fertilizer production process based on three-source fermentation according to claim 6, characterized in that: The process of opening the discharge port of the fermentation tank where fermentation has stopped and introducing the fermented mixed substrate into the organic fertilizer separation device includes: The mixed gas is discharged through an exhaust valve, and the exhaust speed is adjusted according to the pressure difference between the inside and outside of the fermentation tank to ensure exhaust safety.

8. The organic fertilizer production process based on three-source fermentation according to claim 7, characterized in that: The process of determining whether to retain the fermentation mixed matrix, i.e., the seed liquid, according to the weight of the organic fertilizer and the target weight of the organic fertilizer, wherein the target weight of the organic fertilizer is a preset target production weight of the organic fertilizer, comprises: When the weight of the organic fertilizer is less than the target weight of the organic fertilizer, the fermentation mixed matrix is ​​retained as a seed liquid for further fermentation.

9. The organic fertilizer production process based on three-source fermentation according to claim 8, characterized in that: The process of determining the seed solution retention volume according to the fermentation tank volume and the actual microorganism concentration comprises: The first interval of the seed liquid retention volume is determined according to the volume of the fermentation tank, and the target seed liquid retention volume is determined according to the actual microorganism concentration and the seed liquid retention volume interval.

10. An organic fertilizer production device based on three-source fermentation, suitable for the organic fertilizer production process based on three-source fermentation according to any one of claims 1 to 9, characterized in that: include, The pretreatment tank is located at the head end of the organic fertilizer production equipment, and is provided with a crushing chamber, a screening chamber and a mixing chamber, wherein the crushing chamber is provided with a cutter for cutting the fermentation raw materials; the screening chamber is provided with a screening device for screening the fermentation raw materials that meet the preset particle size; the mixing chamber is provided with a mixer for mixing the fermentation raw materials uniformly; A stirring tank, which is connected to the pretreatment tank via a first delivery pipeline and is used for stirring and fermenting the mixed substrate, and a stirring device is arranged therein; A fermentation tank, which is connected to the stirring tank via a second transmission pipeline, is used for fermenting the mixed substrate, and has a built-in fermentation stirring device capable of adjusting the stirring speed; An organic fertilizer separation device, which is connected to the fermentation tank and is used to separate organic fertilizer; An image acquisition device, which is disposed in the stirring tank and is used to acquire an image of the fermentation mixed matrix; A flow meter, which is arranged at the top of the fermentation tank and is used to detect the production speed of the mixed gas; A microorganism detection device, which is disposed in the fermentation tank and is used to detect the concentration of microorganisms in the fermentation tank; a dissolved oxygen sensor, which is disposed in the fermentation tank and is used to detect the dissolved oxygen concentration in the fermentation tank; A heating device, which is arranged in the fermentation tank and is used to heat the fermentation temperature of the fermentation mixed substrate in the fermentation tank; A cooling device, which is arranged in the fermentation tank and is used to cool the fermentation temperature of the mixed substrate in the fermentation tank; A temperature sensor is disposed in the fermentation tank and is used to detect the fermentation temperature in the fermentation tank; A pressure sensor is disposed in the fermentation tank and is used to detect the pressure in the fermentation tank; An exhaust valve is arranged in the fermentation tank and is used to exhaust the mixed gas.

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