Continuous organic mineral liquid fertilizer production method and fermentation and closed-loop circulation cultivation system

Abstract

The invention discloses a continuous organic mineral liquid fertilizer production method and a fermentation and closed-loop circulation cultivation system, a vertical multi-section continuous fermentation tower is used for realizing step-by-step conversion of raw materials in three stages of acidification, chelation and decomposition, and dynamic balance is realized by adopting online transmission and continuous discharging. Meanwhile, the closed-loop recycling unit collects the percolate, and the percolate is desalted and disinfected and then recycled for irrigation; and the online flora maintenance and central control system is combined with PID and a fuzzy algorithm to realize dynamic closed-loop regulation and control on each key parameter, so that the product quality and the production efficiency are improved, and water and fertilizer resources are effectively utilized.

Description

Technical Field

[0001] The present invention relates to the fields of organic agriculture and bioreactor engineering, and in particular to a continuous organic mineral liquid fertilizer production method and a fermentation and closed-loop cultivation system, which are suitable for realizing the continuous production of organic liquid fertilizer, online desalination of leachate, and efficient utilization of nutrients and water resources in the agricultural planting process. Background Art

[0002] At present, in the field of organic agriculture, the production of traditional organic liquid fertilizers mostly adopts batch fermentation technology, which has disadvantages such as poor continuity, unstable process, and low production efficiency. In the traditional batch fermentation process, due to the different working conditions between the production units, the raw materials are not fully hydrolyzed and the product quality is uneven. At the same time, the stability between different batches of products is difficult to guarantee. In addition, the leachate produced during the fermentation process contains high salt content and incompletely converted organic matter. Traditional treatment methods usually rely on chemical precipitation or reverse osmosis, which not only increases the treatment cost, but also poses a risk of secondary pollution, thereby seriously affecting the water resource reuse efficiency and crop irrigation effect. On the other hand, the regulation of microbial communities and nutrient ratios in existing processes are also relatively simple, and cannot fully meet the precise needs of different crops and various growth periods.

[0003] Therefore, there is an urgent need for a production method that adopts a continuous process and combines closed-loop reuse with intelligent regulation, which can not only achieve efficient step-by-step conversion of raw materials, but also perform real-time dynamic regulation of fermentation products, exudates and microbial communities, so as to improve the production efficiency and product quality of liquid fertilizers, and at the same time maximize the utilization of water and fertilizer resources. Summary of the Invention

[0004] The present invention discloses a continuous organic mineral liquid fertilizer production method and a fermentation and closed-loop circulation cultivation system, which aims to overcome the shortcomings of traditional batch processing processes, and realize continuous feeding, segmented reaction, online transmission and continuous discharging through a vertical multi-stage continuous fermentation tower, forming a step-by-step efficient conversion system of raw materials from acidification, chelation to composting. At the same time, the present invention designs a closed-loop reuse unit for real-time collection and recycling of the exudate for drip irrigation after online desalination and disinfection treatment, so as to realize the synchronous utilization of water and fertilizer; in addition, combined with the online addition of bacterial agents to maintain an efficient and stable microbial community, and the central control system to perform PID and fuzzy logic mixed regulation on each key process parameter, the overall system can still operate stably when dealing with raw material and environmental fluctuations. Through the above technical scheme, the present invention significantly improves the production efficiency and product quality of liquid fertilizers, while achieving the goals of resource conservation and environmental protection.

[0005] In one aspect, the present invention provides a method for producing a continuous organic mineral liquid fertilizer, comprising the following steps:

[0006] Continuous feeding step: After the pretreated mineral raw materials and organic raw materials are mixed in a predetermined ratio, they are evenly fed into a vertical multi-stage continuous fermentation tower through an automated continuous feeding device;

[0007] Segmented reaction step: The continuous fermentation tower is provided with an acidification reaction chamber, a chelation reaction chamber and a composting reaction chamber from bottom to top, and each reaction chamber is equipped with an independent temperature control and pH adjustment unit, wherein:

[0008] ① The acidification reaction chamber starts the initial hydrolysis reaction of the raw materials at 38-42°C and pH 5.5-6.0 to generate organic acids and some degradation intermediates;

[0009] ② The chelation reaction chamber is adjusted at 45-50°C and pH 6.5-7.5 through auxiliary materials to allow the trace elements released from the mineral raw materials to fully chelate with the organic degradation products to form a stable complex;

[0010] ③In the composting reaction chamber, under the condition of 30-35℃, the built-in microbial community completes the complete metabolism of organic matter in a continuous oxygen supply environment, generating liquid fertilizer with stable nutrients;

[0011] Online transport step: The reaction products in each reaction chamber are continuously transported at a preset rate through a screw propeller installed between each reaction chamber, ensuring that the raw materials have sufficient and independent reaction residence time in each stage of acidification, chelation and composting;

[0012] Continuous discharging step: A continuous discharging device is set at the lower end of the composting reaction chamber to ensure that the generated liquid fertilizer is continuously and evenly discharged after the reaction is completed, and form a stable dynamic balance with the continuous feeding step, the staged reaction step and the online transmission step.

[0013] Some technical solutions also include a closed-loop recycling step, which includes:

[0014] The exudate produced by each reaction chamber during the continuous fermentation process is collected in real time through a preset piping system;

[0015] The permeate is transported to an online desalination unit, which is based on ion selective membrane and electrodialysis principle to remove Na + Directed removal of ions;

[0016] The desalinated liquid is continuously introduced into the UV-ozone combined unit for disinfection and organic matter degradation;

[0017] The desalinated and disinfected leachate is reused for drip irrigation through a closed-loop piping system, achieving the recycling of water and fertilizer.

[0018] Some technical solutions also include a flora maintenance step, which includes:

[0019] During the continuous fermentation process, the effective bacterial concentration in the fermentation broth is ensured to be no less than 1×108 CFU / mL by online supplementation of bacterial agents containing beneficial microorganisms.

[0020] In some technical solutions, the effective bacterial flora in the continuous fermentation process includes nitrogen-fixing bacteria, phosphate-solubilizing bacteria and EM bacteria, and the online added bacterial agent is mainly a salt-tolerant Trichoderma strain with a concentration of 1×10 9 ~5×109 CFU / mL, and the feeding rate is controlled at 0.05%~0.2% / h of the fermentation liquid volume.

[0021] Some technical solutions also include intelligent closed-loop control steps, which include:

[0022] The central control system is used to monitor the temperature, pH, dissolved oxygen, conductivity and Na in each reaction chamber of the continuous fermentation tower. + , Cl- concentration is monitored in real time, and a PID and fuzzy logic hybrid control algorithm is used to automatically adjust the feed rate, temperature, aeration flow and online desalination intensity to form a closed-loop feedback for the entire process.

[0023] Some technical solutions also include a nutrient ratio step, which includes:

[0024] By adding concentrated mother liquor online and automatically adjusting the N:P:K ratio, precise proportioning for different growth stages of crops can be achieved;

[0025] The N:P:K ratio was 1:0.5:1.2 at the seedling stage, and 1:0.8:2.5 at the fruiting stage.

[0026] On the other hand, the present invention further provides a continuous organic mineral liquid fertilizer fermentation and closed-loop cultivation system for implementing the above production method, comprising:

[0027] The vertical multi-stage continuous fermentation tower is equipped with an acidification reaction chamber, a chelation reaction chamber, and a composting reaction chamber from bottom to top. A screw propeller is used to transport materials at a constant speed between each reaction chamber. It is also equipped with an independent jacket circulating water temperature control system and an aeration device.

[0028] The exudate dynamic balance unit is used to collect and process the exudate generated by each reaction chamber during the fermentation process in real time;

[0029] The bacterial flora chemostat culture unit is used to maintain the microbial concentration in the fermentation tower at not less than 1×108 CFU / mL;

[0030] The central control system is used to monitor the key parameters of each reaction section and leachate treatment process and perform automatic regulation.

[0031] As a preferred solution, the leachate dynamic balance unit is composed of an inclined plate sedimentation tank, an electrodialysis desalination device and an ultraviolet-ozone combination unit connected in sequence to form a continuous treatment loop, which is used to achieve solid-liquid separation, desalination and disinfection of the leachate generated from the continuous fermentation tower, thereby ensuring that the liquid meets the reuse standards.

[0032] As a preferred solution, the bacterial colony chemostat culture unit includes a bacterial agent storage bin and an online replenishing device, both of which are connected to the continuous fermentation tower via an automatic liquid supply pipeline.

[0033] As a preferred solution, the central control system is connected with temperature, pH, dissolved oxygen, conductivity and ion concentration sensors to form an overall automatic monitoring and control network for the continuous fermentation tower, the exudate dynamic balance unit and the bacterial flora constant temperature culture unit.

[0034] The present invention adopts the above technical solution to have at least the following beneficial effects:

[0035] 1. The continuous fermentation process of the present invention adopts a technical framework of continuous feeding, segmented continuous reaction, online transmission and continuous discharging, which realizes the step-by-step conversion of raw materials under optimal working conditions in the three stages of acidification, chelation and composting, significantly improving the reaction efficiency and product uniformity, and avoiding product quality fluctuations caused by uneven residence time in each stage in traditional batch processes.

[0036] 2. The closed-loop recycling unit of the present invention collects the leachate generated during the fermentation process in real time through a preset piping system, and utilizes a continuous treatment circuit based on ion-selective membranes, electrodialysis, and ultraviolet-ozone combination to perform solid-liquid separation, desalination, and disinfection on the leachate, effectively ensuring that the treated liquid meets the irrigation water standards, thereby realizing the recycling of water resources and nutrients and reducing the environmental burden.

[0037] 3. The present invention achieves bacterial flora maintenance by online supplementation of bacterial agents, ensuring that the effective bacterial flora (including nitrogen-fixing bacteria, phosphate-solubilizing bacteria and EM bacteria) is always maintained at no less than 1×10 8 CFU / mL level; in particular, the salt-tolerant Trichoderma strain added online can inhibit pathogens through biological self-purification, thereby improving the stability of the microbial community and the overall biological activity of the fermentation process.

[0038] 4. The present invention uses a central control system to implement real-time monitoring of the temperature, pH, dissolved oxygen, conductivity and ion concentration of each reaction section in the continuous fermentation tower, and adopts a PID and fuzzy logic hybrid control algorithm to automatically adjust the feed rate, temperature control, aeration and online desalination intensity, forming a closed-loop feedback control system for the entire process, effectively responding to fluctuations in raw materials and environmental conditions, and ensuring that the system always operates in the optimal operating state.

[0039] 5. The present invention further achieves nutrient compensation by online supplementation of concentrated mother liquor. The amount of concentrated mother liquor added is automatically adjusted according to the electrical conductivity (EC value) of the fermentation liquid, and the compensation accuracy is maintained within ±5%. At the same time, the N:P:K ratio is dynamically adjusted according to the crop growth period (for example, 1:0.5:1.2 in the seedling stage and 1:0.8:2.5 in the fruiting stage), thereby achieving precise water and fertilizer management, optimizing crop nutrient supply, and improving the quality and yield of agricultural products.

[0040] 6. Overall, the present invention constructs a high-efficiency system that integrates continuous liquid fertilizer production and closed-loop circulation irrigation. Through continuous fermentation, online leachate reuse, bacterial community maintenance and intelligent closed-loop control, it not only greatly improves production efficiency and product quality, but also achieves resource conservation and environmentally friendly sustainable development, with significant economic benefits and broad practical application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a control logic diagram of the continuous organic mineral liquid fertilizer fermentation and closed-loop cultivation system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0042] The following examples are only used to illustrate the technical solution of the present invention more clearly, and are not intended to limit the scope of protection of the present invention.

[0043] Example 1

[0044] According to one aspect of the present invention, a continuous method for producing organic mineral liquid fertilizer is provided. The continuous production method is adopted to integrate the steps of raw material pretreatment, segmented continuous reaction, online transmission, continuous discharge and closed-loop reuse in a vertical multi-stage continuous fermentation tower, so as to realize the efficient step-by-step conversion of raw materials into liquid fertilizer.

[0045] 1. Pretreatment and continuous feeding

[0046] The main raw material is 150-mesh potassium feldspar powder, which is ultrasonically treated with 3% citric acid at 50°C for 30 minutes to increase its activity. Detoxified rapeseed cake, crushed to ≤2mm, is used as the organic raw material. The two are mixed in a predetermined ratio (e.g., 20-25% raw material, 45-50% rapeseed cake, supplemented with 15-18% phosphate rock powder) and then fed continuously and evenly into a continuous fermentation tower via an automated continuous feeding device.

[0047] As an alternative, other mineral materials or organic wastes can be used according to actual conditions. The pretreatment method can be acid pre-activation or enzymatic hydrolysis, but it must be ensured that the raw materials have high biological activity when entering the fermentation tower.

[0048] 2. Segmented continuous reaction

[0049] The continuous fermentation tower is equipped with three reaction chambers from bottom to top, and each chamber adopts an independent temperature control and pH adjustment system.

[0050] (a) Acidification reaction chamber: At a temperature of 38-42°C and a pH of 5.5-6.0, the initial hydrolysis reaction of the raw materials is initiated to generate organic acids and some degradation intermediates. The preferred reaction residence time is 24 hours.

[0051] (b) Chelating reaction chamber: Under the conditions of 45-50°C and pH 6.5-7.5, an appropriate amount of auxiliary materials (such as humic acid iron chelate, accounting for 1.5-2.5% of the total material) are added to adjust the reaction so that the trace elements released from the mineral raw materials fully react with the organic degradation products to form a stable metal-organic complex. The preferred reaction residence time is 48 hours. Further optimization, the auxiliary materials also include nano-sized oyster shell powder (slow-release calcium source CaO ≥ 50%), food-grade magnesium sulfate (Mg ≥ 15%, S ≥ 20%) as complex ion supplements, and fucoidan (accounting for 0.8-1.2% of the total material) as a natural osmotic protectant.

[0052] (c) Maturation reaction chamber: Under the condition of 30-35°C, in a continuously oxygenated environment, the original microbial community in the tower (including nitrogen-fixing bacteria, phosphate-solubilizing bacteria and EM bacteria) is combined with the online supplementary salt-tolerant Trichoderma agent (in this embodiment, the agent concentration is controlled at 1×10 9 ~5×109 CFU / mL, the replenishment rate is 0.05%~0.2% / h of the fermentation liquid volume) to complete the thorough metabolism of organic matter and generate liquid fertilizer with stable nutrients. The preferred reaction residence time is 72 hours.

[0053] Alternatively, the residence time of each reaction chamber can be adjusted appropriately according to the properties of the raw materials and the fermentation process; the pH of the acidification chamber can be appropriately lowered to accelerate hydrolysis, and the type of auxiliary materials in the chelation chamber can be adjusted according to the mineral composition.

[0054] 3. Online transmission and continuous discharging

[0055] A screw propeller is set between each reaction chamber to continuously and steadily transfer the reaction product of the previous reaction chamber to the next reaction chamber at a preset speed (preferably 150-250 rpm), ensuring that each reaction stage obtains sufficient and independent reaction residence time.

[0056] A continuous discharging device is provided at the lower end of the composting reaction chamber, so that the generated liquid fertilizer can be discharged continuously and evenly after the reaction is completed, forming a stable dynamic balance coordinated with continuous feeding and online transmission.

[0057] 4. Closed-loop reuse steps

[0058] The pre-set pipeline system collects part of the effluent generated in each reaction chamber in real time and transports it to the online desalination unit. The desalination unit uses the principle of ion selective membrane and electrodialysis to remove Na + ion for directional removal (so that Na + The removal rate reaches or exceeds 75%, and the electrodialysis desalination rate is not less than 65%), and the desalinated liquid is continuously disinfected and organic matter is degraded through a UV-ozone combined unit. The treated liquid meets the irrigation water standards and is then reused for drip irrigation through a closed-loop piping system to achieve water and fertilizer recycling.

[0059] As an alternative, a multi-stage membrane separation system can be used for desalination treatment; in disinfection, in addition to ultraviolet-ozone, low-concentration ozone can also be used alone for continuous disinfection.

[0060] Example 2

[0061] refer to Figure 1 This embodiment combines a continuous liquid fertilizer production method to construct a complete fermentation and closed-loop cultivation system, the main components and their structures and connection relationships of which are as follows.

[0062] 1. Continuous fermentation tower

[0063] The fermentation tower, constructed from corrosion-resistant stainless steel and with a total height of 5 to 7 meters, houses three interconnected reaction chambers (acidification, chelation, and composting). Each chamber is equipped with an independent jacketed circulating water temperature control system (with an accuracy of ±0.5°C), a pH adjustment unit, and an aeration device. Automated online transmission between the reaction chambers is achieved via a propeller (150 to 250 rpm), ensuring that each reaction chamber reacts independently according to the predetermined residence time (24 hours for acidification, 48 hours for chelation, and 72 hours for composting).

[0064] 2. Exudate dynamic balance unit

[0065] The system is equipped with a dynamic balance unit for leachate, which is composed of an inclined plate sedimentation tank, an electrodialysis desalination device and an ultraviolet-ozone combined unit connected in sequence. The inclined plate sedimentation tank is used for preliminary solid-liquid separation, and its surface load is 0.8m 3 / (m 2 h), remove suspended solids ≥ 95%; the electrodialysis desalination device uses the principle of ion selective membrane to remove Na in the leachate in a targeted manner + ions, with a desalination rate of ≥65% and energy consumption ≤2kW·h / m 3 The UV-ozone combined unit continuously disinfects the desalted liquid and degrades organic matter. The ozone concentration is 0.5 mg / L and the UV dose is 40 mJ / cm 2 , ultimately ensuring that the treated liquid meets the reuse standards.

[0066] Each module is connected to the fermentation tower through a dedicated pipeline to form a complete liquid recycling loop.

[0067] 3. Bacteria Chemostat Culture Unit

[0068] The unit includes a microbial agent storage tank and an online replenishment device, both of which are closely connected to the continuous fermentation tower through an automatic liquid supply pipeline. The system replenishes the compound microbial agent containing salt-tolerant Trichoderma in real time according to the preset strategy (the initial concentration of the microbial agent is 1×10 9 ~5×109CFU / g, the replenishment rate is 0.05%~ of the fermentation liquid volume

[0069] 0.2% / h) to ensure that the effective bacterial concentration during the fermentation process is always not less than 1×108 CFU / mL.

[0070] As an alternative, bacterial flora adjustment can also be achieved by manual replenishment after periodic sampling and testing, or by setting up an automatic replenishment program.

[0071] 4. Central control system

[0072] The central control system is connected with the continuous fermentation tower, the exudate dynamic balance unit and the bacterial flora chemostat unit through data acquisition and communication modules to form an overall automatic monitoring and adjustment network. The system is connected with temperature, pH, dissolved oxygen, conductivity and Na + The system is linked to a Cl- sensor and employs a hybrid PID and fuzzy logic control algorithm to automatically adjust the feed rate, temperature control, aeration, online desalination, and bacterial agent replenishment for each reaction chamber. Furthermore, the system mixes liquid fertilizer with treated leachate through a closed-loop drip irrigation network and supplies it to crops, achieving water and fertilizer recycling.

[0073] As an alternative, the central control system can use a commercial DCS or PLC system and be customized and improved according to the site environment and scale.

[0074] Experimental results and data

[0075] The system was tested in a Ningxia desert greenhouse and operated continuously for 6 months, achieving the following significant results:

[0076] The temperature, pH, DO and other parameters of each reaction chamber in the fermentation tower are automatically adjusted in real time, and the EC value of the fermentation liquid fluctuates within ±5%, which is far superior to traditional batch processing technology.

[0077] The bacterial chemostat ensures that the effective bacterial concentration in the fermentation liquid is always no less than 1×108 CFU / mL, and inhibits pathogens through the biological self-purification of salt-tolerant Trichoderma, with an inhibition rate of more than 90%;

[0078] The central control system realizes dynamic closed-loop control of key process parameters such as temperature, pH, and aeration. At the same time, it automatically replenishes concentrated mother liquor according to the EC value, achieving nutrient compensation accuracy within ±5%. By adjusting the N:P:K ratio online (1:0.5:1.2 in the seedling stage → 1:0.8:2.5 in the fruiting stage), the tomato yield per unit area is increased from the conventional 12kg / m 2 Increased to 15kg / m 2 The fruit cracking rate was reduced to <8% and the sugar content was stabilized at 7.0-8.5°Brix.

[0079] This embodiment organically combines continuous feeding, staged reaction, online transmission, continuous discharge, and closed-loop recycling to create a stable and efficient continuous liquid fertilizer production process. Furthermore, the system utilizes intelligent closed-loop regulation, combining microbial maintenance with central control, to dynamically respond to environmental and raw material changes, achieving efficient, stable, and environmentally friendly production results. The provision of preferred and alternative technical solutions further demonstrates the flexible and adjustable application advantages of this invention, enabling it to achieve significant economic and ecological benefits in organic agricultural facilities of varying scales.

[0080] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A method for producing a continuous organic mineral liquid fertilizer, characterized in that: The following steps are involved: Continuous feeding step: After the pretreated mineral raw materials and organic raw materials are mixed in a predetermined ratio, they are evenly fed into a vertical multi-stage continuous fermentation tower through an automated continuous feeding device; Segmented reaction step: The continuous fermentation tower is provided with an acidification reaction chamber, a chelation reaction chamber and a composting reaction chamber from bottom to top, and each reaction chamber is equipped with an independent temperature control and pH adjustment unit, wherein: ① The acidification reaction chamber starts the initial hydrolysis reaction of the raw materials at 38-42°C and pH 5.5-6.0 to generate organic acids and some degradation intermediates; ② The chelation reaction chamber is adjusted at 45-50°C and pH 6.5-7.5 through auxiliary materials to allow the trace elements released from the mineral raw materials to fully chelate with the organic degradation products to form a stable complex; ③In the composting reaction chamber, under the condition of 30-35℃, the built-in microbial community completes the complete metabolism of organic matter in a continuous oxygen supply environment, generating liquid fertilizer with stable nutrients; Online transport step: The reaction products in each reaction chamber are continuously transported at a preset rate through a screw propeller installed between each reaction chamber, ensuring that the raw materials have sufficient and independent reaction residence time in each stage of acidification, chelation and composting; Continuous discharging step: A continuous discharging device is set at the lower end of the composting reaction chamber to ensure that the generated liquid fertilizer is continuously and evenly discharged after the reaction is completed, and form a stable dynamic balance with the continuous feeding step, the staged reaction step and the online transmission step.

2. The production method according to claim 1, characterized in that It also includes a closed-loop recycling step, which includes: The exudate produced by each reaction chamber during the continuous fermentation process is collected in real time through a preset piping system; The permeate is transported to an online desalination unit, which is based on ion selective membrane and electrodialysis principle to remove Na + Directed removal of ions; The desalinated liquid is continuously introduced into the UV-ozone combined unit for disinfection and organic matter degradation; The desalinated and disinfected leachate is reused for drip irrigation through a closed-loop piping system, achieving the recycling of water and fertilizer.

3. The production method according to claim 1, characterized in that It also includes a flora maintenance step, which includes: During the continuous fermentation process, the effective bacterial concentration in the fermentation broth is ensured to be no less than 1×108 CFU / mL by online supplementation of bacterial agents containing beneficial microorganisms.

4. The production method according to claim 3, characterized in that The effective bacterial flora in the continuous fermentation process includes nitrogen-fixing bacteria, phosphate-solubilizing bacteria and EM bacteria, and the online supplementary bacterial agent is mainly a salt-tolerant Trichoderma strain with a concentration of 1×10 9 ~5×10 9 CFU / mL, and the feeding rate was controlled at 0.05% to 0.2% of the fermentation broth volume / h.

5. The production method according to claim 1, characterized in that It also includes an intelligent closed-loop control step, which includes: The central control system is used to monitor the temperature, pH, dissolved oxygen, conductivity and Na in each reaction chamber of the continuous fermentation tower. + , Cl- concentration is monitored in real time, and a PID and fuzzy logic hybrid control algorithm is used to automatically adjust the feed rate, temperature, aeration flow and online desalination intensity to form a closed-loop feedback for the entire process.

6. The production method according to claim 1, characterized in that The step of nutrient matching is also included, and the steps include: By adding concentrated mother liquor online and automatically adjusting the N:P:K ratio, precise proportioning for different growth stages of crops can be achieved; The N:P:K ratio was 1:0.5:1.2 at the seedling stage, and 1:0.8:2.5 at the fruiting stage.

7. A continuous organic mineral liquid fertilizer fermentation and closed-loop cultivation system for implementing the production method according to any one of claims 1 to 6, characterized in that: include: The vertical multi-stage continuous fermentation tower is equipped with an acidification reaction chamber, a chelation reaction chamber, and a composting reaction chamber from bottom to top. A screw propeller is used to transport materials at a constant speed between each reaction chamber. It is also equipped with an independent jacket circulating water temperature control system and an aeration device. The exudate dynamic balance unit is used to collect and process the exudate generated by each reaction chamber during the fermentation process in real time; The bacterial flora chemostat culture unit is used to maintain the microbial concentration in the fermentation tower at not less than 1×108 CFU / mL; The central control system is used to monitor the key parameters of each reaction section and leachate treatment process and perform automatic regulation.

8. The continuous organic mineral liquid fertilizer fermentation and closed-loop cultivation system according to claim 7, characterized in that: The leachate dynamic balance unit is composed of an inclined plate sedimentation tank, an electrodialysis desalination device and an ultraviolet-ozone combination unit connected in sequence to form a continuous treatment loop, which is used to achieve solid-liquid separation, desalination and disinfection of the leachate generated from the continuous fermentation tower, thereby ensuring that the liquid meets the reuse standards.

9. The continuous organic mineral liquid fertilizer fermentation and closed-loop cultivation system according to claim 7, characterized in that: The bacterial colony chemostat culture unit comprises a bacterial agent storage bin and an online replenishing device, both of which are connected to the continuous fermentation tower via an automatic liquid supply pipeline.

10. The continuous organic mineral liquid fertilizer fermentation and closed-loop cultivation system according to claim 7, characterized in that: The central control system is connected with temperature, pH, dissolved oxygen, conductivity and ion concentration sensors to form an overall automatic monitoring and control network for the continuous fermentation tower, the exudate dynamic balance unit and the bacterial flora constant temperature culture unit.

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