An organic waste slurry automatic precise recycling system and operation method

Abstract

The present application relates to a kind of automatic precision reuse system and operating method of biogas slurry for organic waste treatment, the system is by detection system, central control system, dosing system, supply system, storage system five systems composition, detection system connection control system, the data of storage system detected is passed to central control system, central control system controls dosing system and supply system, control dosing system is transported to storage system by biogas slurry, supply system is transported to dosing system by supply biogas slurry, so that the whole system keeps normal and stable operation.The present application realizes the full automation operation of biogas slurry supply by the joint operation of each system, realizes the intelligent monitoring, supply of the nutrient substance required for different soil, different crops, different planting cycle, has significant environmental benefits and economic benefits, to supplement the nutrient required for crop growth, avoid the abuse of chemical fertilizer, destroy soil fertility.

Description

Technical Field

[0001] This invention belongs to the field of biogas slurry supply and soil improvement, specifically relating to an automatic and precise recycling system and operation method for biogas slurry from organic waste. Background Technology

[0002] Soil fertility refers to the soil's ability to provide and coordinate nutrient and environmental conditions for plant growth. Long-term, irrational use of chemical fertilizers leads to soil deterioration, resulting in soil acidification, compaction, decreased fertility, and increased pollution. Excessive use of chemical fertilizers fails to nourish the soil, causing a decline in soil organic matter. Chemical fertilizers cannot compensate for this lack of organic matter, further impacting the survival of soil microorganisms, damaging soil fertility structure, and reducing fertilizer efficiency. Anaerobic fermentation biogas slurry contains abundant nutrients and minerals. Promoting the widespread use of biogas slurry and reducing chemical fertilizer use can effectively alleviate this situation. Therefore, in practical applications, developing an automated and precise biogas slurry reuse system and operating method for organic waste, enabling intelligent monitoring and replenishment of nutrients required by different soils and crops, has significant environmental and economic benefits.

[0003] Patent application CN202210676444.1, entitled "A Pretreatment Technology for Drip Irrigation of Biogas Slurry and Its Application," discloses a flow-type pretreatment technology for drip irrigation of biogas slurry. The technology includes a main biogas slurry supply pipeline. The front end of the main pipeline is fixedly connected to a biogas slurry storage tank. A supply pump and a supply solenoid valve are sequentially arranged along the biogas slurry flow direction of the main pipeline. The rear end of the main pipeline is fixedly connected to a pH adjustment unit, which is also fixedly connected to one end of the main biogas slurry delivery pipeline. Along the biogas slurry flow direction, the main biogas slurry delivery pipeline is sequentially equipped with a hydrogen peroxide treatment unit, an ultraviolet and ozone coupling treatment unit, and an outlet. The hydrogen peroxide treatment unit is connected in parallel to the main biogas slurry delivery pipeline. The inlet of the ultraviolet and ozone coupling treatment unit is fixedly connected to both sides of the main biogas slurry delivery pipeline via a four-way connector. The outlet is fixedly connected to another outlet of the four-way connector. An irrigation solenoid valve and an irrigation pump are sequentially arranged along the biogas slurry flow direction. However, the patent does not involve the dynamic replenishment of biogas slurry, the system has a low degree of automation, and it cannot make judgments based on the actual situation of the biogas slurry receptors to achieve precise replenishment of nutrients lacking in farmland.

[0004] Patent application CN201510224500.8, entitled "An Integrated Irrigation and Disinfection Test Device," discloses an integrated irrigation and disinfection test device, mainly composed of a centrifugal pump, pressure sensor, flow sensor, ion concentration sensor, and control system. It possesses comprehensive functions including irrigation and fertilization, sprinkler and drip irrigation load simulation, water and fertilizer parameter detection, fertilizer absorption channel parameter detection, and return channel parameter detection. Furthermore, it effectively combines the detection of nutrient ion concentration information in irrigation, dynamic nutrient solution allocation, and nutrient solution disinfection, thus achieving high-precision dynamic nutrient solution allocation and simulated irrigation area load, meeting the requirements of the test system during the development of irrigation and fertilization systems. However, this patent does not provide targeted replenishment for different soils and crops, failing to achieve precise nutrient replenishment. Summary of the Invention

[0005] Purpose of the invention: To overcome the shortcomings of existing technologies, this invention provides an automated and precise biogas slurry reuse system and operating method for organic waste treatment. It can actively monitor the content of elements and antibiotic resistance genes in farmland, as well as the climate, in real time, and proportionally adjust the replenished biogas slurry to efficiently replenish farmland fertility. This avoids the excessive application of chemical fertilizers that lead to a decline in soil organic matter, while creating a more suitable soil environment for crop growth and increasing crop yields. It has significant environmental and economic benefits.

[0006] Technical solution: The objective of this invention is achieved through the following technical means:

[0007] An automatic and precise biogas slurry reuse system for organic waste treatment is provided. The system includes a detection system (1), a central control system (2), a dosing system (3), a replenishment system (4), and a collection system (5). The detection system is connected to the central control system and transmits the data detected by the collection system, dosing system, and replenishment system to the central control system. After processing the data, the central control system controls the dosing system and replenishment system to open or close according to the instructions. The dosing system is controlled to deliver biogas slurry to the collection system, and the replenishment system is controlled to deliver replenishment biogas slurry to the dosing system, so that the entire system can maintain normal and stable operation.

[0008] The detection system (1) includes: a detection unit (1-1), a low level detector for the replenishment pool (1-2), a low level detector for the biogas slurry pool (1-3), a high level detector for the biogas slurry pool (1-4), and a land information detector (1-5). The low level detector for the biogas slurry pool is located near the bottom of the biogas slurry pool, the high level detector for the biogas slurry pool (1-4) is located on the side wall near the top, and the low level detector for the replenishment pool (1-2) is located on the side wall near the bottom of the replenishment pool. The land information detector (1-5) is located at the edge of the storage system (5). The detection unit (1-1) collects various types of information obtained by the level detectors and the land information detector.

[0009] Specifically, the land information detectors (1-5) detect land type, element content, climate, element content in soil, and antibiotic resistance gene residues.

[0010] The central control system (2) includes a central control calculation unit (2-1) and a cumulative transport biogas slurry flow calculation module (2-2); the detection unit (1-1) transmits the collected liquid level detection information and soil information of the collection system to the central control system (2) for statistical analysis; among them, the cumulative transport biogas slurry flow calculation module (2-2) calculates the biogas slurry supply for the entire process.

[0011] The dosing system (3) includes a biogas slurry tank (3-1), a biogas slurry tank mixer (3-3), a biogas slurry tank sealing film (3-4), a biogas slurry tank pump (3-5), a biogas slurry tank drain pipe (3-6), a flow meter (3-7), a pressure gauge (3-8), a biogas slurry tank supply pipe (3-9), a biogas slurry tank external pipe (3-10), and a timer (3-11); wherein, the sealing film (3-4) covers the top of the biogas slurry tank, the mixer (3-3) is set in the middle of the biogas slurry tank, the output end of the pump (3-5) is connected to the supply pipe (3-9), the input end of the pipe extends into the biogas slurry tank, and the end of the supply pipe (3-9) is connected to the planting land of the collection system (5), on which various crops are planted;

[0012] A flow meter (3-7) and a pressure gauge (3-8) are installed on the supply pipe (3-9), and the drain pipe (3-6) is arranged at the bottom of the biogas slurry tank (3-1); the flow meter (3-7), the pressure gauge (3-8), and the timer (3-11) are all connected to the detection unit (1-1) of the detection system (1).

[0013] The replenishment system (4) includes a biogas slurry replenishment tank (4-1), a biogas slurry replenishment tank mixer (4-3), a biogas slurry replenishment tank sealing film (4-4), a replenishment tank pump (4-5), a biogas slurry replenishment tank drain pipe (4-6), and a biogas slurry replenishment tank replenishment pipe (4-7). The biogas slurry replenishment tank (4-1) is equipped with a mixer (4-3), its surface is covered with a sealing film (4-4), and its bottom is equipped with a drain pipe (4-6). The output end of the pump (4-5) is connected to the replenishment pipe (4-7), and its input end extends into the biogas slurry replenishment tank (4-1). The output end of the replenishment pipe (4-7) is connected to the replenishment tank (4-1).

[0014] The storage system (5) is for planting land;

[0015] The biogas slurry replenishment pool (4-1) of the replenishment system, the biogas slurry pool (3-1) of the addition system (3), and the planting land of the collection system (5) are connected by pipelines; the biogas slurry pool pump (3-5) is set on the bank of the biogas slurry pool (3-1), one for use and one for standby; the replenishment pool pump (4-5) is set on the bank of the biogas slurry replenishment pool (4-1).

[0016] An operational method for an automated and precise biogas slurry reuse system for organic waste treatment includes the following steps:

[0017] Step 1) The detection system (1) obtains relevant data f through the land information detector (1-5). i (i = 1, 2, 3...n), the detection system (1) will detect the data f i Transmitted to the central control system in the form of electrical signals (2);

[0018] Note: f1 represents the type of land used for planting;

[0019] f2 represents the soil moisture content;

[0020] f3 represents the carbon-to-nitrogen ratio in the soil;

[0021] f4 represents the phosphorus content in the soil;

[0022] f5 represents the potassium content in the soil;

[0023] f6 represents climatic conditions;

[0024] f7 antibiotic resistance gene residue.

[0025] Step 2) The central control system (2) receives the data transmitted by the detection system (1) to obtain f i ;

[0026] Based on f1 (soil planting type) and f6 (climatic conditions), the content of each element f i (i = 2, 3, 4, 5) are used for judgment.

[0027] For F i Determine if all satisfy f i (i = 2, 3, 4, 5) ≥ F i When (i = 2, 3, 4, 5) and f7 < F0, the result is considered false, and biogas slurry is no longer added;

[0028] When f i (i = 2, 3, 4, 5) <F i When (i = 2, 3, 4, 5) and f7 > F0, the result is true, and the supply of biogas slurry begins.

[0029] F iThe optimal content of an element (mg / m³) under specific soil planting species and climatic conditions. 3 ;

[0030] F0 represents the optimal content of antibiotic resistance genes under specific soil planting species and climatic conditions, in mg / m³. 3

[0031] F i The appropriate content of elements can be referenced from the table of nitrogen, phosphorus and potassium content in normal soil.

[0032]

[0033] Step 3) Calculate the supply of biogas slurry and each element. Based on the results detected by the land information detector (1-5), calculate the amounts according to the different detected elements f. i (i = 2, 3, 4, 5), corresponding to the function f(f) where the concentration of different elements decreases with increasing soil depth. i ), f(f i The calculation steps are as follows: ∝h

[0034]

[0035]

[0036] Note: f i ′ represents the amount of the element to be supplemented, in mg;

[0037] f(f i ) for distinct elements f i The concentration decreases as soil depth increases;

[0038] F i The optimal content of an element (mg / m³) under specific soil planting species and climatic conditions. 3 ;

[0039] F0 represents the optimal content of antibiotic resistance genes under specific soil planting species and climatic conditions, in mg / m³. 3

[0040] f i The current content of the element, mg / m³ 3 ;

[0041] A represents the area of ​​the planting soil, in meters. 2 ;

[0042] H represents the average root depth of the planted crops, in meters.

[0043] α is the loss coefficient, which is usually taken as 0.75 to 0.85.

[0044] Step 4) Calculate the biogas slurry supply based on the results of Step 3. Assume the concentration of this element in the biogas slurry is c0.

[0045]

[0046] Note: T 需 For the biogas slurry demand, m 3 ;

[0047] f i ′ represents the amount of the element to be supplemented, in mg;

[0048] c0 represents the concentration of this element in the biogas slurry, in mg / m³. 3 .

[0049] F7 antibiotic resistance gene residues must not exceed the soil range.

[0050] Step 5) Simultaneously start the cumulative biogas slurry flow calculation module (2-2) to calculate the biogas slurry supply. The calculation steps are as follows:

[0051]

[0052] Note: T: Actual biogas slurry supply, m³ 3 ;

[0053] β is the pipeline loss coefficient, which is usually taken as 0.85-0.95;

[0054] v is the flow velocity of the biogas slurry in the supply pipeline, in m / s;

[0055] d is the diameter of the supply pipe, in meters.

[0056] Step 6) First, turn on the biogas slurry replenishment tank mixer (4-3) and the biogas slurry tank mixer (3-3). Then, according to the supply instructions of the central control system (2), the dosing system (3) starts the biogas slurry tank pump (3-5) to supply the collection system (5); at the same time, the cumulative biogas slurry flow calculation module (2-2) calculates the amount of biogas slurry supplied and displays the data.

[0057] Step 7) When T = T_demand, the supply ends and the supply system automatically shuts down.

[0058] Step 8) When the supply liquid in the biogas slurry tank (3-1) is insufficient and the liquid level reaches H1, the low liquid level detector (1-3) of the biogas slurry tank transmits the signal to the central control system (2) in the form of an electrical signal. Then, the replenishment system (4) will start the replenishment tank pump (4-5) to supply the biogas slurry tank (3-1) from the replenishment tank (3-2) according to the replenishment command of the central control system (2). When the biogas slurry tank is sufficient and the liquid level reaches H2, the high liquid level detector (1-4) of the biogas slurry tank transmits the signal to the central control system (2) in the form of an electrical signal. Then, the replenishment system (4) will shut down the replenishment tank pump (4-5) according to the stop replenishment command of the central control system (2) to stop replenishing the biogas slurry tank. If the biogas slurry tank is still insufficient, step 4) is repeated to complete another round of replenishment. The replenishment amount is calculated as follows:

[0059]

[0060] Note: T 补 Actual biogas slurry replenishment volume, m 3 ;

[0061] γ is the pipeline loss coefficient, which is usually taken as 0.85-0.95;

[0062] v is the flow velocity of biogas slurry in the biogas slurry replenishment pipeline of the biogas slurry replenishment tank, m / s;

[0063] d is the diameter of the biogas slurry replenishment pipeline, in meters.

[0064] Step 9) After the supply is completed, the dosing system (3) will stop dosing according to the instructions of the central control system (2) and shut down the biogas slurry tank pump (3-5), and then shut down the biogas slurry replenishment tank mixer (4-3) and the biogas slurry tank mixer (3-3); thus proceeding with the next supply.

[0065] Step 10) Regularly clean the storage tank and test the sludge concentration in the liquid. The sludge concentration is measured as c. When the following conditions are met:

[0066] When c≥c0, cleaning begins; when c≤c0, cleaning is not required.

[0067] The amount of sludge removed was:

[0068]

[0069] Note: V 排泥 m is the amount of sludge to be removed from the storage tank. 3 ;

[0070] V 储液池 Let m be the volume of the liquid in the storage tank. 3 ;

[0071] c represents the sludge concentration of the liquid in the storage tank, in mg / L;

[0072] c0 is the standard sludge concentration of the liquid in the storage tank, in mg / L;

[0073] c1 represents the sludge concentration of the discharged sludge, in mg / L.

[0074] Beneficial effects: Compared with the prior art, the advantages of this invention are:

[0075] (1) It realizes the automated and intelligent replenishment of biogas slurry in farmland. By setting up a detection system, dosing system, replenishment system and central control system, it replaces the traditional direct application of chemical fertilizers to farmland. It realizes the accurate detection and dosing of biogas slurry replenishment for different soils and crops, thereby improving soil fertility. It has the characteristics of high automation and low fault tolerance.

[0076] (2) The detection system and the central control system are optimized and operate efficiently. The detection system and the central control system adopt intelligent programming to detect element content, antibiotic resistance gene content, climate in real time, and automatically adjust the input ratio of each nutrient to keep the carbon-nitrogen ratio, phosphorus, trace elements, etc. in the optimal range, thereby achieving the optimal range of nutrients required by the soil and improving the utilization efficiency of nutrients.

[0077] (3) This invention avoids excessive and untargeted fertilization of the soil, making the soil environment more suitable for the growth of different kinds of crops, and has significant environmental and economic benefits. Attached Figure Description

[0078] Figure 1 This is a schematic diagram of an automatic and precise recycling system for organic waste biogas slurry.

[0079] Figure 2 This is a flowchart illustrating the operation of an automated and precise recycling system for organic waste biogas slurry.

[0080] Figure 3 A cross-sectional view of an automated and precise recycling system for biogas slurry from organic waste;

[0081] Figure 4 This is a plan view of an automated and precise recycling system for organic waste biogas slurry.

[0082] In the diagram: 1-Detection system, 2-Central control system, 3-Dosing system, 4-Replenishment system, 5-Storage system

[0083] 1-1-Detection unit, 1-2-Low level detector for replenishment pool, 1-3-Low level detector for biogas slurry pool, 1-4-High level detector for biogas slurry pool, 1-5-Land information detector;

[0084] 2-1-Central control computing unit; 2-2-Cumulative biogas slurry transport flow calculation module;

[0085] 3-1-Biogas slurry tank; 3-3-Biogas slurry tank mixer; 3-4-Biogas slurry tank sealing film; 3-5-Biogas slurry tank pump; 3-6-Biogas slurry tank drain pipe; 3-7-Flow meter; 3-8-Pressure gauge; 3-9-Biogas slurry tank supply pipe; 3-10-Biogas slurry tank external connection pipe; 3-11-Timer.

[0086] 4-1-Sewage slurry replenishment tank, 4-3-Sewage slurry replenishment tank mixer, 4-4-Sewage slurry replenishment tank sealing film, 4-5-Replenishment tank pump, 4-6-Sewage slurry replenishment tank drain pipe, 4-7-Sewage slurry replenishment tank replenishment pipe. Detailed Implementation

[0087] The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0088] Example 1

[0089] An automatic and precise recycling system for biogas slurry from organic waste includes: a detection system 1, a central control system 2, a dosing system 3, a replenishment system 4, and a collection system 5. The detection system 1 is connected to the central control system and transmits the detected data from the collection system to the central control system 2. The central control system is connected to the dosing system 3 and the replenishment system 4, controlling the dosing system to deliver biogas slurry to the collection system and the replenishment system to deliver replenishment biogas slurry to the dosing system, so that the entire system maintains normal and stable operation.

[0090] Example 1

[0091] The operation method of an automated and precise recycling system for organic waste biogas slurry includes the following steps:

[0092] Step 1) The detection system (1) obtains relevant data f through the land information detector (1-5). i (i = 1, 2, 3...n), the detection system (1) will detect the data f i Transmitted to the central control system in the form of electrical signals (2);

[0093] Note: f1 represents the type of land used for planting;

[0094] f2 represents the soil moisture content;

[0095] f3 represents the carbon-to-nitrogen ratio in the soil;

[0096] f4 represents the phosphorus content in the soil;

[0097] f5 represents the potassium content in the soil;

[0098] f6 represents climatic conditions;

[0099] Residual f7 antibiotic resistance genes.

[0100] Step 2), the central control system (2) receives the data transmitted by the detection system (1) to obtain f i ;

[0101] According to f1 (soil planting type), f6 (climatic conditions), determine the content of each element f i (i = 2, 3, 4, 5).

[0102] When f3 < F3, f4 ≥ F4, f5 ≥ F5, f7 < F7, it is determined that in the storage system, the carbon-nitrogen ratio is lower than the appropriate value, and dosing needs to be carried out according to the lack of the carbon-nitrogen ratio, and the content of the remaining elements meets the requirements.

[0103] Step 3) Calculate the supply amount of biogas slurry and each element. According to the results detected by the land information detector (1-5), calculate. According to the element f3 and its corresponding function f(f3) where the concentration decreases with the increase of soil depth, f(f3) ∝ h, the calculation steps are as follows:

[0104]

[0105] Note: f3′ is the amount of the required supplementary element, mg;

[0106] f(f3) is the function of different elements f i where the concentration decreases with the increase of soil depth;

[0107] F3 is the appropriate content of the element, mg / m 3 ;

[0108] f3 is the existing content of the element, mg / m 3 ;

[0109] A is the area of the planting soil, m 2 ;

[0110] H is the average rooting depth of the planted crops, m;

[0111] α is the loss coefficient, usually taken as 0.75 - 0.85.

[0112] Step 4) Calculate the biogas slurry supply amount according to the calculation result of Step 3. Assume the concentration of the element in the biogas slurry is c0

[0113]

[0114] Note: T 需 is the biogas slurry demand, m 3 ;

[0115] f3′ represents the amount of the element to be added, in mg;

[0116] c0 represents the concentration of this element in the biogas slurry, in mg / m³. 3 .

[0117] Step 5) Simultaneously start the cumulative biogas slurry flow calculation module (2-2) to calculate the biogas slurry supply. The calculation steps are as follows:

[0118]

[0119] Note: T: Actual biogas slurry supply, m³ 3 ;

[0120] β is the pipeline loss coefficient, which is usually taken as 0.85-0.95;

[0121] v is the flow velocity of the biogas slurry in the supply pipeline, in m / s;

[0122] d is the diameter of the supply pipe, in meters.

[0123] Step 6) First, turn on the biogas slurry replenishment tank mixer (4-3) and the biogas slurry tank mixer (3-3). Then, according to the supply instructions of the central control system (2), the dosing system (3) starts the biogas slurry tank pump (3-5) to supply the collection system (5); at the same time, the cumulative biogas slurry flow calculation module (2-2) calculates the amount of biogas slurry supplied and displays the data.

[0124] Step 7) When T = T_demand, the supply ends and the supply system automatically shuts down.

[0125] Step 8) When the supply liquid in the biogas slurry tank (3-1) is insufficient and the liquid level reaches H1, the low liquid level detector (1-3) of the biogas slurry tank transmits the signal to the central control system (2) in the form of an electrical signal. Then, the replenishment system (4) will start the replenishment tank pump (4-5) to supply the biogas slurry tank (3-1) from the replenishment tank (3-2) according to the replenishment command of the central control system (2). When the biogas slurry tank is sufficient and the liquid level reaches H2, the high liquid level detector (1-4) of the biogas slurry tank transmits the signal to the central control system (2) in the form of an electrical signal. Then, the replenishment system (4) will shut down the replenishment tank pump (4-5) according to the stop replenishment command of the central control system (2) to stop replenishing the biogas slurry tank. If the biogas slurry tank is still insufficient, step 4) is repeated to complete another round of replenishment. The replenishment amount is calculated as follows:

[0126]

[0127] Note: T 补 Actual biogas slurry replenishment volume, m 3 ;

[0128] γ is the pipeline loss coefficient, usually taken as 0.85 - 0.95;

[0129] v is the flow velocity of biogas slurry in the supply pipeline of the biogas slurry supply pool, m / s;

[0130] d is the diameter of the supply pipeline of the biogas slurry supply pool, m.

[0131] Step 9): After the supply is completed, the dosing system (3) stops dosing according to the instruction of the central control system (2), closes the biogas slurry pool pumping pump (3 - 5), and then closes the biogas slurry supply pool mixer (4 - 3) and the biogas slurry pool mixer (3 - 3); thus, the next supply is carried out.

[0132] Step 10): The storage tank is cleaned out, and the sludge concentration in the liquid of the storage tank is detected. The measured sludge concentration is c. After judgment: c ≥ c0, the cleaning out starts.

[0133] The amount of sludge to be cleaned out is:

[0134]

[0135] Note: V 排泥 is the amount of sludge to be cleaned out in the storage tank, m 3 ;

[0136] V 储液池 is the liquid volume of the storage tank, m 3 ;

[0137] c is the sludge concentration in the liquid of the storage tank, mg / L;

[0138] c0 is the standard sludge concentration in the liquid of the storage tank, mg / L;

[0139] c1 is the sludge concentration of the discharged sludge, mg / L.

[0140] Step 11): The sludge concentration in the liquid of the storage tank is detected again. If c < c0, the cleaning out is completed.

[0141] Example 2

[0142] An operation method of an automatic precise reuse system for organic waste biogas slurry is as follows:

[0143] Step 1): The detection system (1) obtains relevant data f i (i = 1, 2, 3... n) through the land information detector (1 - 5). The detection system (1) transmits the detection data f i to the central control system (2) in the form of an electrical signal;

[0144] Note: f1 is the type of land cultivation;

[0145] f2 is the soil moisture content;

[0146] f3 is the carbon-nitrogen ratio in the soil;

[0147] f4 is the phosphorus element content in the soil;

[0148] f5 is the potassium element content in the soil;

[0149] f6 is the climate condition;

[0150] f7 is the residual antibiotic resistance genes.

[0151] Step 2), the central control system (2) receives the data transmitted by the detection system (1) to obtain f i ;

[0152] According to f1 (soil planting type), f6 (climate condition), determine the content of each element f i (i = 2, 3, 4, 5).

[0153] When f3≥F3, f4<F4, f5≥F5, f7<F7, it is determined that in the storage system, the phosphorus element content is lower than the appropriate value, and it is necessary to add according to the lack of phosphorus element, and the contents of the remaining elements meet the requirements.

[0154] Step 3) Calculate the supply amount of biogas slurry and each element. According to the results detected by the land information detector (1-5), calculate. According to the element f4, and its corresponding function f(f4) in which the concentration decreases with the increase of soil depth, f(f4) ∝ h, the calculation steps are as follows:

[0155]

[0156] Note: f4′ is the amount of the required supplementary element, mg;

[0157] f(f4) is the function of different elements f i in which the concentration decreases with the increase of soil depth;

[0158] F4 is the appropriate content of the element under a certain soil planting type and climate condition, mg / m 3 ;

[0159] f4 is the existing content of the element, mg / m 3 ;

[0160] A is the area of the planted soil, m 2 ;

[0161] H is the average rooting depth of the planted crop roots, m;

[0162] α is the loss coefficient, usually taking 0.75 - 0.85.

[0163] Step 4) Calculate the biogas slurry replenishment amount based on the calculation results in Step 3. Assume the concentration of this element in the biogas slurry is c0.

[0164]

[0165] Note: T 需 For the biogas slurry demand, m 3 ;

[0166] f4′ represents the amount of the element to be supplemented, in mg;

[0167] c0 represents the concentration of this element in the biogas slurry, in mg / m³. 3 .

[0168] Step 5) Simultaneously start the cumulative biogas slurry flow calculation module (2-2) to calculate the biogas slurry supply. The calculation steps are as follows:

[0169]

[0170] Note: T: Actual biogas slurry supply, m³ 3 ;

[0171] β is the pipeline loss coefficient, which is usually taken as 0.85-0.95;

[0172] v is the flow velocity of the biogas slurry in the supply pipeline, in m / s;

[0173] d is the diameter of the supply pipe, in meters.

[0174] Step 6) First, turn on the biogas slurry replenishment tank mixer (4-3) and the biogas slurry tank mixer (3-3). Then, according to the supply instructions of the central control system (2), the dosing system (3) starts the biogas slurry tank pump (3-5) to supply the collection system (5); at the same time, the cumulative biogas slurry flow calculation module (2-2) calculates the amount of biogas slurry supplied and displays the data.

[0175] Step 7) When T = T_demand, the supply ends and the supply system automatically shuts down.

[0176] Step 8) When the supply liquid in the biogas slurry tank (3-1) is insufficient and the liquid level reaches H1, the low liquid level detector (1-3) of the biogas slurry tank transmits the signal to the central control system (2) in the form of an electrical signal. Then, the replenishment system (4) will start the replenishment tank pump (4-5) to supply the biogas slurry tank (3-1) from the replenishment tank (3-2) according to the replenishment command of the central control system (2). When the biogas slurry tank is sufficient and the liquid level reaches H2, the high liquid level detector (1-4) of the biogas slurry tank transmits the signal to the central control system (2) in the form of an electrical signal. Then, the replenishment system (4) will shut down the replenishment tank pump (4-5) according to the stop replenishment command of the central control system (2) to stop replenishing the biogas slurry tank. If the biogas slurry tank is still insufficient, step 4) is repeated to complete another round of replenishment. The replenishment amount is calculated as follows:

[0177]

[0178] Note: T 补 Actual biogas slurry replenishment volume, m 3 ;

[0179] γ is the pipeline loss coefficient, which is usually taken as 0.85-0.95;

[0180] v is the flow velocity of biogas slurry in the biogas slurry replenishment pipeline of the biogas slurry replenishment tank, m / s;

[0181] d is the diameter of the biogas slurry replenishment pipeline, in meters.

[0182] Step 9) After the supply is completed, the dosing system (3) stops dosing according to the instructions of the central control system (2) and shuts down the biogas slurry tank pump (3-5), and then shuts down the biogas slurry replenishment tank mixer (4-3) and the biogas slurry tank mixer (3-3); thus proceeding with the next supply.

[0183] Step 10) Clean the storage tank and test the sludge concentration in the liquid. The sludge concentration is measured as c. If c ≥ c0, start cleaning.

[0184] The amount of sludge removed was:

[0185]

[0186] Note: V 排泥 m is the amount of sludge to be removed from the storage tank. 3 ;

[0187] V 储液池 Let m be the volume of the liquid in the storage tank. 3 ;

[0188] c represents the sludge concentration of the liquid in the storage tank, in mg / L;

[0189] c0 is the standard sludge concentration of the liquid in the storage tank, in mg / L;

[0190] c1 represents the sludge concentration of the discharged sludge, in mg / L.

[0191] Step 11) The sludge concentration in the liquid in the storage tank is tested again.

Claims

1. An operation method for an automatic and precise recycling system for organic waste biogas slurry, wherein the automatic and precise recycling system for organic waste biogas slurry includes a detection system (1), a central control system (2), a dosing system (3), a replenishment system (4), and a collection system (5); the detection system is connected to the central control system and transmits the detected data from the collection system, dosing system, and replenishment system to the central control system; the central control system processes the data and controls the dosing system and replenishment system to open or close according to instructions, controlling the dosing system to deliver biogas slurry to the collection system and the replenishment system to deliver replenishment biogas slurry to the dosing system, so that the entire system maintains normal and stable operation; characterized in that, Includes the following steps: Step 1) The detection system (1) uses land information detectors (1-5) to detect and obtain relevant data f i (i=1, 2, 3……n), the detection system (1) will detect the data f i Transmitted to the central control system in the form of electrical signals (2); Note: f1 represents the type of land used for planting; f2 represents the soil moisture content; f3 represents the carbon-to-nitrogen ratio in the soil; f4 represents the phosphorus content in the soil; f5 represents the potassium content in the soil; f6 represents climatic conditions; F7 antibiotic resistance gene residue; Step 2), the central control system (2) transmits data f to the detection system (1). i The determination is based on the following criteria: This f i (i=2,3,4,5) ≥ F i (i=2, 3, 4, 5) And f7 < F0 If the result is false, no further biogas slurry will be added. This f i (i=2,3,4,5) < F i (i=2, 3, 4, 5) And f7 > F0 If the result is true, the biogas slurry supply will begin. The optimal content of an element (mg / m³) under specific soil planting species and climatic conditions. 3 ; F0 represents the optimal content of antibiotic resistance genes under specific soil planting species and climatic conditions, in mg / m³. 3 Step 3) Calculate the supply of biogas slurry and each element: Based on the results detected by the land information detector (1-5), the central control computing unit (2-1) performs calculations according to different detection elements f. i (i=2, 3, 4, 5), corresponding to the function f(f) that represents the decrease in concentration of different elements with increasing soil depth. i The calculation steps are as follows: (Equation 1) Note: The amount of the element to be supplemented, in mg; f(f) i ) for different elements The concentration decreases as soil depth h increases; The optimal content of an element (mg / m³) under specific soil planting species and climatic conditions. 3 ; The current content of the element, mg / m³ 3 ; The area of ​​the planting soil is m 2 ; The average root depth of the planted crops, in meters; This is the loss coefficient, typically taken as 0.75~0.85; Step 4) Based on the calculation results in Step 3), calculate the biogas slurry supply: Assume the concentration of this element in the biogas slurry is c0. (Equation 2) Note: For the biogas slurry demand, m 3 ; The amount of the element to be supplemented, in mg; The concentration of this element in the biogas slurry is in mg / m³. 3 ; Step 5) Simultaneously, the cumulative biogas slurry flow calculation module (2-2) calculates the biogas slurry supply. The calculation steps are as follows: (Equation 3) Note: T: Actual biogas slurry supply, m³; This is the pipeline loss factor, typically taken as 0.85-0.95; The flow velocity of biogas slurry in the supply pipeline is expressed in m / s. The diameter of the supply pipe is in meters (m). Step 6) First, turn on the biogas slurry tank mixer (3-3), and then the dosing system (3) starts the biogas slurry tank pump (3-5) to supply the collection system (5) according to the supply instructions of the central control system (2); at the same time, the cumulative biogas slurry flow calculation module (2-2) calculates the amount of biogas slurry supplied and displays the data. Step 7) When When this time comes, the supply will end and the dosing system will automatically shut down; Step 8) When the supply liquid to the biogas slurry tank (3-1) is insufficient and the liquid level reaches H1, the low liquid level detector (1-3) of the biogas slurry tank transmits the signal to the central control system (2) in the form of an electrical signal. Then, the replenishment system (4) will start the replenishment tank pump (4-5) to supply the biogas slurry tank (3-1) from the replenishment biogas slurry tank (3-2) according to the replenishment instruction of the central control system (2). When the biogas slurry tank is full and the liquid level reaches H2, the biogas slurry tank high liquid level detector (1-4) will transmit the signal to the central control system (2) in the form of an electrical signal. Then the replenishment system (4) will shut down the replenishment tank pump (4-5) and stop replenishing the biogas slurry tank according to the stop replenishment instruction of the central control system (2). If the biogas slurry tank is still insufficient, repeat step 8) to complete another round of replenishment. The replenishment amount is calculated as follows: (Equation 4) Note: Actual biogas slurry replenishment volume, m³; This is the pipeline loss factor, typically taken as 0.85-0.95; The flow velocity of biogas slurry in the biogas slurry replenishment pipeline of the biogas slurry replenishment tank is expressed in m / s. Diameter of the supply pipe to the biogas slurry replenishment tank, in meters; Step 9) After the supply is completed, the feeding system (3) will stop feeding according to the instructions of the central control system (2) and shut down the biogas slurry tank pump (3-5), and then shut down the biogas slurry replenishment tank mixer (4-3) and the biogas slurry tank mixer (3-3).

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