An intelligent low-carbon treatment and reuse system for rainwater and sewage

Abstract

The present invention discloses an intelligent low-carbon treatment and reuse system for rainwater and sewage, including: a biological retention module for collecting rainwater and treating it to obtain treated rainwater; a numerical control drainage module for collecting redox potential data and pH data of treated rainwater as environmental data and transmitting them to a control module, and discharging treated rainwater for a preset time based on a first control signal sent by the control module; a rainwater and sewage collection module for storing discharged treated rainwater and maintaining the water storage within a preset range; an irrigation module for collecting soil moisture data of the biological retention module and transmitting it to the control module, and extracting stored water in the rainwater and sewage collection module for irrigating the biological retention module based on a second control signal sent by the control unit; and a control module for receiving environmental data and performing double judgment, sending a first control signal when a preset condition is met, receiving soil moisture data, and sending a second control signal when the set condition is met. Stable, efficient and low-carbon treatment and reuse of rainwater and sewage are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of rainwater and sewage treatment, and more particularly to an intelligent rainwater and sewage low-carbon treatment and reuse system. Background Art

[0002] As a key green infrastructure, bioretention systems are widely adopted and constructed, and have a good removal effect on pollutants such as nitrogen and phosphorus in runoff. To ensure efficient nitrogen removal, existing technologies have improved traditional bioretention systems, including adding electron donors and adding flooded areas. The purpose of setting up flooded areas is to establish anoxic conditions, expand the area of ​​the reaction zone, and allow rainwater to stay for a period of time to ensure that the reaction occurs fully to enhance the rainwater treatment effect.

[0003] As the retention time of rainwater increases, greenhouse gas emissions increase accordingly. Excessive retention of rainwater in the collection module will lead to a significant increase in the radiative forcing caused by greenhouse gas emissions, thus affecting the balance of denitrification and carbon reduction. However, if the rainwater is discharged too early, the existing system will generally face the problem of limited plant growth and impaired microbial activity after the rainwater is discharged, which will greatly affect the denitrification performance of the system during the next rainfall. Therefore, a more flexible management strategy is needed to meet this challenge.

[0004] Therefore, how to reduce the impact of greenhouse gas emissions accompanying the system treatment process on the ecology while ensuring stable and efficient treatment of rainwater nitrogen pollution is an urgent problem that technical personnel in this field need to solve. Summary of the invention

[0005] In view of this, the present invention provides an intelligent low-carbon treatment and reuse system for rainwater and sewage, which achieves stable and efficient rainwater treatment while reducing the impact of greenhouse gas emissions accompanying the system treatment process.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] An intelligent low-carbon rainwater and sewage treatment and reuse system, comprising: a bioretention module, a numerically controlled drainage module, a rainwater and sewage collection module, an irrigation module and a control module;

[0008] The bioretention module is used to collect rainwater, improve the species of bacterial flora, and treat the rainwater to obtain treated rainwater;

[0009] The digital control drainage module is used to collect the oxidation-reduction potential data and the pH data of the treated rainwater and transmit them to the control module as environmental data, and discharge the treated rainwater for a preset time based on the first control signal sent by the control module;

[0010] The rainwater and sewage collection module is used to store the discharged treated rainwater and maintain the water storage volume within a preset range;

[0011] The irrigation module is used to collect soil moisture data of the bioretention module and transmit it to the control module, and extract the stored water in the rainwater and sewage collection module to irrigate the bioretention module based on the second control signal sent by the control unit;

[0012] The control module is used to receive the environmental data and perform a double judgment, send the first control signal when a preset condition is met, receive the soil moisture data, and send the second control signal when the set condition is met.

[0013] Preferably, the bioretention module comprises: a planting layer, a filler layer, a drainage layer and a drainage pipe;

[0014] The planting layer is used to collect and filter rainwater, slow down the speed of rainwater runoff, and perform nitrification reaction;

[0015] The filler layer has a predetermined amount of plant carbon source built in it, which is used to provide carbon source for microorganisms, improve the species of bacterial flora, and perform denitrification reaction on rainwater to obtain the treated rainwater;

[0016] The drainage layer is used to support the planting layer and the filler layer and facilitate the drainage of the treated rainwater to the pipeline;

[0017] The drainage pipe is in communication with the drainage layer and is used for the drainage of the treated rainwater.

[0018] Preferably, the bioretention module further comprises: a water outlet pipe;

[0019] The water outlet pipe is communicated with the drain pipe and is used for discharging excess rainwater when the amount of rainwater is greater than a set value.

[0020] Preferably, the digital control drainage module comprises: an ORP electrode, an ORP monitor, a pH electrode, a pH monitor and an electric ball valve;

[0021] The ORP electrode is used to collect the oxidation-reduction potential data of the treated rainwater and transmit it to the ORP monitor;

[0022] The ORP monitor is used to receive and display the oxidation-reduction potential data and transmit it to the control module;

[0023] The pH electrode is used to collect pH data of the treated rainwater and transmit it to the pH monitor;

[0024] The pH monitor is used to receive and display the pH data and transmit it to the control module;

[0025] The electric ball valve is installed on the drainage pipe, and is used to receive and discharge the treated rainwater for a preset time period based on the first control signal.

[0026] Preferably, the rainwater and sewage collection module comprises: a water inlet tank, a water supply pipe, a float valve, an overflow box, a water pipe check valve and an overflow port;

[0027] The water inlet tank is in communication with the drainage pipe and is used to store the treated rainwater and supplementary sewage;

[0028] The water supply pipe is arranged at a preset height on one side of the water inlet tank, is connected to the water inlet tank, and is used to connect to the sewage pipe network to introduce sewage;

[0029] The float valve is arranged on the water supply pipe, and is used to introduce sewage through the water supply pipe when the water volume of the water inlet tank is lower than the height of the water supply pipe, and stop introducing sewage when the water level reaches the height of the water supply pipe;

[0030] The overflow tank is used to store the treated rainwater that exceeds the capacity of the inlet tank;

[0031] The water pipe check valve is lower than the height of the drain pipe and is used to connect the water inlet tank and the overflow tank so that the treated rainwater exceeding the capacity of the water inlet tank flows into the overflow tank in one direction;

[0032] The overflow port is used to discharge the treated rainwater exceeding the capacity of the overflow tank to the pipe.

[0033] Preferably, the rainwater and sewage collection module further comprises: an air pipe one-way valve;

[0034] The air pipe one-way valve is used to connect the water inlet tank and the overflow tank, and is used to keep the pressure of the water inlet tank and the pressure of the overflow tank the same without generating negative pressure.

[0035] Preferably, the irrigation module comprises: a humidity sensor, a spray pump, a nozzle and a water pipe;

[0036] The humidity sensor is used to collect the soil humidity data of the planting area and transmit it to the control module;

[0037] The spray pump is used to receive and pump out the stored water in the water inlet tank and the overflow tank based on the second control signal;

[0038] The spray head is used to spray the stored water;

[0039] One end of the water delivery pipe is connected to the spray pump, and the other end is connected to the water inlet tank and the overflow tank respectively, so as to deliver the water stored in the water inlet tank and the overflow tank.

[0040] Preferably, it also includes: a hierarchical power supply control module;

[0041] The hierarchical power supply control module is used to power the CNC drainage module, the irrigation module and the control module, collect precipitation signals and transmit them to the control module, and preferentially power the CNC drainage module based on the third control signal sent by the control module, or preferentially power the irrigation module based on the fourth control signal sent by the control module.

[0042] Preferably, the hierarchical power supply control module comprises: a solar controller, a solar panel, a battery pack and a rain and snow detector;

[0043] The solar controller is connected to the solar panel and the battery pack, respectively, and is used to detect the voltage and current of the solar panel in real time, provide battery protection function to prevent overcharging, overdischarging and short circuit, receive and control the battery pack to preferentially supply power to the numerical control drainage module according to the third control signal, and receive and control the battery pack to preferentially supply power to the irrigation module according to the fourth control signal;

[0044] The solar panel is used to convert solar energy into electrical energy;

[0045] The battery pack is used to store the electrical energy and to supply power to the digital controlled drainage module, the irrigation module and the control module;

[0046] The rain and snow detector is used to detect precipitation signals and transmit them to the control module.

[0047] Preferably, the control module is further used to receive and judge the precipitation signal, and send the third control signal or the fourth control signal accordingly according to the judgment result;

[0048] The control module includes: a receiving unit, a double judgment unit, a humidity analysis unit, a precipitation monitoring unit and a sending unit;

[0049] The receiving unit is used to receive the environmental data, the soil moisture data and the precipitation signal, and transmit them to the dual judgment unit, the moisture analysis unit and the precipitation monitoring unit accordingly;

[0050] The dual judgment unit is used to judge whether the difference of the oxidation-reduction potential data at a preset time interval within a continuous preset number of times is less than a first threshold value, and if so, the first judgment standard is met, and after the first judgment standard is met, the total radiative forcing is calculated based on the oxidation-reduction potential data and the pH data, and when the total radiative forcing is less than a second threshold value, the second judgment standard is met, and the first control signal is sent to the sending unit;

[0051] The humidity analysis unit is configured to send the second control signal to the sending unit when the soil humidity data is less than a third threshold;

[0052] The precipitation monitoring unit is used to make a judgment based on the precipitation signal, and when in a precipitation state, send the third control signal to the sending unit, and when in a dry state, send the fourth control signal to the sending unit;

[0053] The sending unit is used to receive and send the first control signal, the second control signal, the third control signal or the fourth control signal.

[0054] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses an intelligent low-carbon treatment and reuse system for rainwater and sewage, which has the following beneficial effects:

[0055] 1. The present invention collects relevant data in real time, calculates a reasonable drainage time, and discharges rainwater in time, thereby reducing carbon emissions while ensuring the denitrification effect.

[0056] 2. The present invention monitors the degree of soil dryness and wetness. When the soil moisture is lower than the threshold, the treated rainwater and sewage are reused for irrigation in the dry period, thereby ensuring the stability and efficiency of the system during continuous operation, avoiding the problem of plants and microorganisms facing growth restrictions and damaged activity when rainwater is discharged, which greatly affects the denitrification performance of the system during the next rainfall.

[0057] 3. The present invention adds a preset amount of sawdust to the packing layer to degrade organic matter, which can provide a carbon source for microorganisms, domesticate and improve the types of flora in the bioretention system, and improve the denitrification efficiency of the system while increasing the operating cycle of the system.

[0058] 4. The present invention improves the adaptive ability of the system in complex rainfall environments through an automated adjustment mechanism, effectively enhances operational efficiency and stability, and thereby achieves effective utilization of solar energy resources.

[0059] 5. The system of the present invention realizes the efficient treatment of nutrients in runoff rainwater through optimized design and intelligent control, and reduces the carbon pollution caused by greenhouse gas emissions during the treatment process. While efficiently reusing rainwater and sewage and utilizing resources, it extends the engineering service life of the biological retention system. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0061] Figure 1 This is a schematic diagram of the structure of an intelligent low-carbon treatment and reuse system for rainwater and sewage provided by the present invention.

[0062] Figure 2 A schematic diagram of the structure of an intelligent low-carbon treatment and reuse system for rainwater and sewage provided in Example 2 of the present invention.

[0063] Figure 3 This is a structural plan view of an intelligent low-carbon rainwater and sewage treatment and reuse system provided in Example 2 of the present invention.

[0064] Figure 4 This is a schematic diagram of the control module structure provided in Example 2 of the present invention.

[0065] Figure 5 This is a flow chart of the first level judgment method provided in Example 2 of the present invention.

[0066] Figure numerals: 1-planting layer, 2-filling layer, 3-drainage layer, 4-drainage pipe, 5-flooded area, 6-outlet pipe, 7-ORP electrode, 8-ORP monitor, 9-pH electrode, 10-pH monitor, 11-electric ball valve, 12-control module, 13-water inlet tank, 14-water supply pipe, 15-float valve, 16-overflow box, 17-water pipe check valve, 18-overflow port, 19-air pipe one-way valve, 20-humidity sensor, 21-spray pump, 22-nozzle, 23-water pipe, 24-solar controller, 25-solar crystal panel, 26-battery pack, 27-rain and snow detector. DETAILED DESCRIPTION

[0067] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] Example 1

[0069] like Figure 1As shown, the embodiment of the present invention discloses an intelligent low-carbon treatment and reuse system for rainwater and sewage, including: a biological retention module, a numerically controlled drainage module, a rainwater and sewage collection module, an irrigation module and a control module;

[0070] The bioretention module is used to collect rainwater, improve the bacterial flora, and treat the rainwater to obtain treated rainwater;

[0071] A numerical control drainage module, used for collecting oxidation-reduction potential data and pH data of the treated rainwater and transmitting them to the control module as environmental data, and discharging the treated rainwater for a preset time based on a first control signal sent by the control module;

[0072] A rainwater and sewage collection module is used to store the discharged treated rainwater and maintain the water storage volume within a preset range;

[0073] an irrigation module, used for collecting soil moisture data of the bioretention module and transmitting it to the control module, and extracting stored water in the rainwater and sewage collection module to irrigate the bioretention module based on a second control signal sent by the control unit;

[0074] The control module is used to receive environmental data and perform a double judgment, send a first control signal when a preset condition is met, receive soil moisture data, and send a second control signal when the set condition is met.

[0075] Example 2

[0076] like Figure 2-Figure 3 As shown, the embodiment of the present invention discloses an intelligent low-carbon treatment and reuse system for rainwater and sewage, including: a biological retention module, a numerically controlled drainage module, a rainwater and sewage collection module, an irrigation module and a control module;

[0077] The bioretention module is used to collect rainwater, improve the bacterial flora, and treat the rainwater to obtain treated rainwater:

[0078] Preferably, the bioretention module comprises: a planting layer 1, a filler layer 2, a drainage layer 3 and a drainage pipe 4;

[0079] Planting layer 1, composed of soil and plants, is used to collect and filter rainwater. It removes pollutants such as suspended solids and heavy metals through the physical filtration of the soil, slows down the runoff of rainwater, and plants absorb inorganic nitrogen through assimilation, and nitrification reaction is carried out by microorganisms, effectively purifying water quality;

[0080] The packing layer 2 has a predetermined amount of plant carbon source (such as sawdust, straw) built in, which is used to provide carbon source for microorganisms, improve the species of bacterial flora, and further denitrify rainwater to obtain treated rainwater;

[0081] The drainage layer 3 is used to support the planting layer 1 and the filler layer 2 and facilitate the drainage of rainwater to the pipeline;

[0082] The drainage pipe 4 is connected to the drainage layer 3 and is used to handle rainwater discharge.

[0083] Preferably, in this embodiment, the packing layer 2 contains 10% sawdust, and the organic matter produced by degradation can provide a carbon source for microorganisms, domesticate and improve the types of bacterial flora in the bioretention system, and improve the system's denitrification efficiency while increasing the system's operating cycle.

[0084] Preferably, the packing layer 2 can effectively improve the purification effect of rainwater by selecting suitable packing materials (such as gravel, sand, etc.) to remove pollutants such as suspended matter and organic matter therein.

[0085] Preferably, the drainage layer 3 can quickly drain excess water from the soil of the planting layer 1 to avoid problems such as plant root rot and soil compaction caused by water accumulation. By draining water in time, the drainage layer helps to maintain the air permeability and looseness of the soil, which is beneficial to the growth of plant roots and the activity of soil microorganisms.

[0086] Preferably, the filler layer 2 and the drainage layer 3 together constitute the flooded area 5. The existence of the flooded area 5 promotes the flow of air when the runoff enters the system, thereby helping to form the coexistence of aerobic, anaerobic and anaerobic environments, improving the denitrification capacity, and significantly enhancing the removal effect of the biological retention pond on nitrate nitrogen; the flooded area 5 can provide the necessary moisture for vegetation during drought periods, which helps to maintain the vegetation growth and landscape effect in the biological retention pond.

[0087] Preferably, the bioretention module further comprises: a water outlet pipe 6;

[0088] The water outlet pipe 6 is connected to the drain pipe 4 and is used to discharge excess rainwater to the sewer pipe when the amount of rainwater is greater than a set value.

[0089] The numerical control drainage module is used to collect the redox potential data and pH data of the processed rainwater and transmit them to the control module as environmental data, and discharge the processed rainwater for a preset time based on the first control signal sent by the control module:

[0090] Preferably, the digital control drainage module comprises: an ORP electrode 7, an ORP monitor 8, a pH electrode 9, a pH monitor 10 and an electric ball valve 11;

[0091] ORP electrode 7, used to collect oxidation-reduction potential data of treated rainwater and transmit it to ORP monitor 8;

[0092] ORP monitor 8, used to receive and display oxidation-reduction potential data and transmit it to control module 12;

[0093] pH electrode 9, used to collect pH data of rainwater and transmit it to pH monitor 10;

[0094] The pH monitor 10 is used to receive and display pH data and transmit it to the control module 12;

[0095] The electric ball valve 11 is installed on the drainage pipe 4, and is used to receive and discharge the treated rainwater for a preset time period based on the first control signal.

[0096] Preferably, after several experiments, it was found that the water stored in the flooded area of ​​biological retention systems of different specifications can basically be discharged within 10 minutes. Therefore, in this embodiment, the preset time is set to 10 minutes, that is, the electric ball valve 11 is automatically closed after being opened for 10 minutes, ensuring that the biological retention system recovers to a state where a flooded area can be generated to cope with the runoff rainwater treatment during the next rainfall, thereby realizing the automation of the entire control process.

[0097] Preferably, the ORP electrode 7 and the pH electrode 9 are arranged in the flooded area 4 to collect corresponding data of the treated rainwater.

[0098] Preferably, the control module 12 fits the relationship between the oxidation-reduction potential (ORP), pH and greenhouse gas (GHG) concentration by collecting environmental data for a long time, and sets a double judgment procedure in combination with the denitrification "knee point". The control module 12 judges that the ORP value satisfies the preset range corresponding to the GHG and nitrogen concentrations at the same time, and the control module 12 immediately sends a first control signal to start the electric ball valve 11, drains water according to the set time and resets. This is the ideal drainage time for carbon-nitrogen balance with good water treatment effect and low greenhouse effect caused by greenhouse gas emissions.

[0099] The rainwater and sewage collection module is used to store the discharged treated rainwater, replenish sewage when the rainwater is insufficient, and maintain the water storage volume within the preset range:

[0100] Preferably, the rainwater and sewage collection module comprises: a water inlet tank 13, a water supply pipe 14, a float valve 15, an overflow box 16, a water pipe check valve 17 and an overflow port 18;

[0101] The water inlet tank 13 is connected to the drainage pipe 4 and is used to store treated rainwater and supplementary sewage. The discharged treated rainwater can enter the water inlet tank 13 without external pressure due to the height difference. No matter how much treated rainwater is discharged from the drainage pipe 4, it can flow into the water inlet tank 13 without the need for a pump;

[0102] The water supply pipe 14 is arranged at a preset height on one side of the water inlet tank 13, is communicated with the water inlet tank 13, and is used to connect to the sewage pipe network to introduce sewage;

[0103] The float valve 15 is arranged on the water supply pipe 14, and is used to introduce sewage through the water supply pipe 14 when the water level in the water inlet tank 13 is lower than the height of the water supply pipe 14, and stop introducing sewage when the water level reaches the height of the water supply pipe 14, so as to ensure that there is water in the water inlet tank 13 continuously;

[0104] an overflow tank 16 for storing treated rainwater that exceeds the capacity of the inlet tank 13;

[0105] The water pipe check valve 17 is lower than the height of the drain pipe 4 and is used to connect the water inlet tank 13 and the overflow tank 16 so that the treated rainwater exceeding the capacity of the water inlet tank 13 flows into the overflow tank 16 in one direction;

[0106] The overflow port 18 is used to discharge the treated rainwater exceeding the capacity of the overflow tank 16 to the sewer pipe.

[0107] Preferably, the rainwater and sewage collection module further comprises: an air pipe one-way valve 19;

[0108] The air pipe one-way valve 19 is used to connect the water inlet tank 13 and the overflow tank 16, and is used to keep the pressure of the water inlet tank 13 the same as the pressure of the overflow tank 16, without generating negative pressure, to ensure that excess rainwater can flow out smoothly from the water pipe check valve 17.

[0109] Preferably, when the height of treated rainwater stored in the water inlet tank 13 exceeds the drain pipe 4, the rainwater cannot be discharged smoothly, so an overflow box 16 is added above the water inlet tank 13, and the water inlet tank 13 and the overflow box 16 are connected through a water pipe check valve 17 and an air pipe one-way valve 19.

[0110] an irrigation module, used to collect soil moisture data of the bioretention module and transmit it to the control module, extract stored water in the rainwater and sewage collection module to irrigate the bioretention module based on a second control signal sent by the control unit, and perform secondary treatment on the mixed rainwater and sewage;

[0111] Preferably, the irrigation module includes: a humidity sensor 20, a spray pump 21, a nozzle 22 and a water pipe 23;

[0112] The humidity sensor 20 is used to collect soil humidity data of the planting area 1 and transmit it to the control module 12;

[0113] The spray pump 21 is used to receive and pump out the stored water in the water inlet tank 13 and the overflow tank 16 based on the second control signal;

[0114] The nozzle 22 is used to spray the stored water, and the whole system performs secondary treatment on the sprayed mixed rainwater and sewage;

[0115] One end of the water delivery pipe 23 is connected to the spray pump 21 , and the other end is connected to the water inlet tank 13 and the overflow tank 16 respectively, so as to deliver the water stored in the water inlet tank 13 and the overflow tank 16 .

[0116] Preferably, it also includes: a hierarchical power supply control module;

[0117] The hierarchical power supply control module is used to power the CNC drainage module, the irrigation module and the control module 12, collect the precipitation signal and transmit it to the control module 12, and give priority to powering the CNC drainage module based on the third control signal sent by the control module 12, or give priority to powering the irrigation module based on the fourth control signal sent by the control module.

[0118] Preferably, the hierarchical power supply control module includes: a solar controller 24, a solar panel 25, a battery pack 26 and a rain and snow detector 27;

[0119] The solar controller 24 is connected to the solar panel 25 and the battery pack 26 respectively, and is used to detect the voltage and current of the solar panel 25 in real time, provide a battery protection function to prevent overcharging, overdischarging and short circuit, receive and control the battery pack 26 to preferentially supply power to the numerical control drainage module according to the third control signal, and receive and control the battery pack 26 to preferentially supply power to the irrigation module according to the fourth control signal;

[0120] Solar panels 25, used to convert solar energy into electrical energy;

[0121] A battery pack 26, used to store electrical energy and to supply power to the digital control drainage module, the irrigation module and the control module 12;

[0122] The rain and snow detector 27 is used to detect precipitation signals and transmit them to the control module 12 .

[0123] Preferably, the system of the present invention adopts solar power supply, saves energy, and adopts an intelligent classification mode, with a rain and snow detector, which monitors the environmental status in real time to control the power supply. When it rains or snows, the electric energy stored in the battery pack 26 is first supplied to the numerical control drainage module, so that the biological retention system can accurately control the whole process of rainwater denitrification and carbon reduction, and the remaining energy can be allocated to other modules; when it is dry for a long time, the electric energy stored in the battery pack 26 is first supplied to the irrigation module, and the system is accurately irrigated to ensure the good growth of microorganisms and plants therein. The adaptive ability of the system in a complex rainfall environment is improved through an automated adjustment mechanism, and the operation efficiency and stability are effectively enhanced, thereby realizing the effective use of solar energy resources.

[0124] The control module is used to receive environmental data and perform a double judgment, send a first control signal when a preset condition is met, receive soil moisture data, and send a second control signal when the set condition is met.

[0125] Preferably, the control module is further used to receive and judge the precipitation signal, and send the third control signal or the fourth control signal according to the judgment result;

[0126] like Figure 4 As shown, the control module includes: a receiving unit, a double judgment unit, a humidity analysis unit, a precipitation monitoring unit and a sending unit;

[0127] The receiving unit is used to receive environmental data, soil moisture data and precipitation signals, and transmit them to the double judgment unit, the moisture analysis unit and the precipitation monitoring unit accordingly;

[0128] A double judgment unit is used to judge whether the difference of the redox potential data at a preset time interval within a continuous preset number of times is less than a first threshold value, and if it is satisfied, it meets the first judgment standard, and after meeting the first judgment standard, the total radiative forcing is calculated based on the redox potential data and the pH data, and when the total radiative forcing is less than a second threshold value, the second judgment standard is met, and the first control signal is sent to the sending unit;

[0129] The humidity analysis unit is used to send a second control signal to the sending unit when the soil humidity data is less than a third threshold value;

[0130] a precipitation monitoring unit, configured to make a judgment based on the precipitation signal, and send a third control signal to the sending unit when the state is precipitation, and send a fourth control signal to the sending unit when the state is dry;

[0131] The sending unit is used to receive and send the first control signal, the second control signal, the third control signal or the fourth control signal.

[0132] Preferably, the double judgment unit performs double judgment including:

[0133] The first level of judgment: control of denitrification effect.

[0134] Through long-term monitoring of the ORP data in the system, it is found that the ORP value shows a regular change trend within a few hours after the rainwater enters the system: it first decreases slowly, then decreases rapidly in a certain period of time, and then tends to be flat. Studies have confirmed that the stage of rapid decline in ORP values ​​is the stage at which the denitrification reaction ends. The biological retention system removes nitrate nitrogen from rainwater mainly through denitrification. Therefore, the denitrification process inside the system can be judged by the change in ORP values.

[0135] In this embodiment, the ORP monitor 8 collects the oxidation-reduction potential data (ORP data) in the system every 1 minute, and sets the judgment conditions, such as Figure 5 As shown, the first judgment process is as follows:

[0136] S1 determines whether the ORP value at the n+1th minute minus the ORP value at the nth minute is less than a first threshold;

[0137] S2: If yes, determine whether the ORP value at the n+2th minute minus the ORP value at the n+1th minute is less than the first threshold value. If not, return to S1.

[0138] S3: If yes, determine whether the ORP value at the n+3th minute minus the ORP value at the n+2th minute is less than the first threshold value. If not, return to S1.

[0139] If yes, S4 meets the preliminary judgment; if no, return to S1.

[0140] S5 determines whether the preliminary judgment is met for three consecutive times. If so, it meets the first judgment standard. Otherwise, it does not meet the first judgment standard and returns to S1.

[0141] The second judgment: control of greenhouse gases.

[0142] Through long-term experimental data collection, it was found that there is a strong correlation between ORP, pH and the radiative forcing value caused by greenhouse gases. Therefore, a regression analysis was performed to obtain the relationship formula between ORP, pH and radiative forcing:

[0143] Y=aX1+bX2+c,

[0144] Where Y represents the total radiative forcing, X1 represents the ORP value, X2 represents the pH value, a represents the X1 coefficient, b represents the X2 coefficient, and c represents the constant term.

[0145] The ORP monitor 8 and the pH monitor 10 collect the oxidation-reduction potential data (ORP data) and the pH data (pH data) in the system every 1 minute, and set the judgment program. The second judgment process is as follows:

[0146] S1 determines whether Y is less than a second threshold value after substituting the ORP data and pH data of the nth minute into the formula Y=aX1+bX2+c;

[0147] If S2 is true, it meets the second judgment standard; if not, it returns to S1.

[0148] Preferably, when the ORP data and pH data at a certain moment simultaneously meet the judgment thresholds of the denitrification control and greenhouse gas radiation forcing setting conditions, it is in compliance with the double judgment. At this time, it is the ideal drainage time for carbon-nitrogen balance with good water quality treatment effect and low greenhouse effect caused by greenhouse gas emissions.

[0149] Preferably, in this embodiment, the first threshold is set to -1.6, and the second threshold is set to 55.84.

[0150] Preferably, the precipitation monitoring unit is used to make judgments based on the precipitation signal. When in a precipitation state, a third control signal is sent to the sending unit, and the CNC drainage module is preferentially powered by the third control signal; when in a dry state, a fourth control signal is sent to the sending unit, and the irrigation module is preferentially powered by the fourth control signal.

[0151] Through the above technical solutions, it can be seen that the present invention discloses an intelligent low-carbon treatment and reuse system for rainwater and sewage, which has the following beneficial effects:

[0152] 1. The present invention collects relevant data in real time, calculates a reasonable drainage time, and discharges rainwater in time, thereby reducing carbon emissions while ensuring the denitrification effect.

[0153] 2. The present invention monitors the degree of soil dryness and wetness. When the soil moisture is lower than the threshold, the treated rainwater and sewage are reused for irrigation in the dry period, thereby ensuring the stability and efficiency of the system during continuous operation, avoiding the problem of plants and microorganisms facing growth restrictions and damaged activity when rainwater is discharged, which greatly affects the denitrification performance of the system during the next rainfall.

[0154] 3. The present invention adds a preset amount of sawdust to the packing layer to degrade organic matter, which can provide a carbon source for microorganisms, domesticate and improve the types of flora in the bioretention system, and improve the denitrification efficiency of the system while increasing the operating cycle of the system.

[0155] 4. The present invention improves the adaptive ability of the system in complex rainfall environments through an automated adjustment mechanism, effectively enhances operational efficiency and stability, and thereby achieves effective utilization of solar energy resources.

[0156] 5. The system of the present invention realizes the efficient treatment of nutrients in runoff rainwater through optimized design and intelligent control, and reduces the carbon pollution caused by greenhouse gas emissions during the treatment process. While efficiently reusing rainwater and sewage and utilizing resources, it extends the engineering service life of the biological retention system.

[0157] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0158] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An intelligent low-carbon rainwater and sewage treatment and reuse system, characterized in that: include: Bioretention module, CNC drainage module, rainwater and sewage collection module, irrigation module and control module; The bioretention module is used to collect rainwater, improve the species of bacterial flora, and treat the rainwater to obtain treated rainwater; The digital control drainage module is used to collect the oxidation-reduction potential data and the pH data of the treated rainwater and transmit them to the control module as environmental data, and discharge the treated rainwater for a preset time based on the first control signal sent by the control module; The rainwater and sewage collection module is used to store the discharged treated rainwater and maintain the water storage volume within a preset range; The rainwater and sewage collection module includes: a water inlet tank, a water supply pipe, a float valve, an overflow box, a water pipe check valve and an overflow port; The water supply pipe is arranged at a preset height on one side of the water inlet tank, is connected to the water inlet tank, and is used to connect to the sewage pipe network to introduce sewage; The float valve is arranged on the water supply pipe, and is used to introduce sewage through the water supply pipe when the water volume of the water inlet tank is lower than the height of the water supply pipe, and stop introducing sewage when the water level reaches the height of the water supply pipe; The irrigation module is used to collect soil moisture data of the bioretention module and transmit it to the control module, and extract the stored water in the rainwater and sewage collection module to irrigate the bioretention module based on the second control signal sent by the control module; The control module is used to receive the environmental data and perform a double judgment, and send the first control signal when a preset condition is met, and receive the soil moisture data and send the second control signal when the set condition is met; Also included: a hierarchical power supply control module; The hierarchical power supply control module is used to supply power to the numerical control drainage module, the irrigation module and the control module, collect precipitation signals and transmit them to the control module, and preferentially supply power to the numerical control drainage module based on the third control signal sent by the control module, or preferentially supply power to the irrigation module based on the fourth control signal sent by the control module; The control module is further used to receive and judge the precipitation signal, and send the third control signal or the fourth control signal accordingly according to the judgment result; The control module includes: a dual judgment unit, a precipitation monitoring unit, a receiving unit, a humidity analysis unit and a sending unit; The dual judgment unit is used to judge whether the difference of the oxidation-reduction potential data at a preset time interval within a continuous preset number of times is less than a first threshold value, and if so, the first judgment standard is met, and after the first judgment standard is met, the total radiative forcing is calculated based on the oxidation-reduction potential data and the pH data, and when the total radiative forcing is less than a second threshold value, the second judgment standard is met, and the first control signal is sent to the sending unit; The precipitation monitoring unit is used to make a judgment based on the precipitation signal, and when in a precipitation state, send the third control signal to the sending unit, and when in a dry state, send the fourth control signal to the sending unit; The receiving unit is used to receive the environmental data, the soil moisture data and the precipitation signal, and transmit them to the dual judgment unit, the moisture analysis unit and the precipitation monitoring unit accordingly; The humidity analysis unit is configured to send the second control signal to the sending unit when the soil humidity data is less than a third threshold; The sending unit is used to receive and send the first control signal, the second control signal, the third control signal or the fourth control signal.

2. According to claim 1, the intelligent low-carbon treatment and reuse system for rainwater and sewage is characterized in that: The bioretention module comprises: a planting layer, a filler layer, a drainage layer and a drainage pipe; The planting layer is used to collect and filter rainwater, slow down the speed of rainwater runoff, and perform nitrification reaction; The filler layer has a predetermined amount of plant carbon source built in it, which is used to provide a carbon source for microorganisms, improve the species of bacterial flora, and perform a denitrification reaction on rainwater to obtain the treated rainwater; The drainage layer is used to support the planting layer and the filler layer and facilitate the drainage of the treated rainwater to the pipeline; The drainage pipe is in communication with the drainage layer and is used for the drainage of the treated rainwater.

3. The intelligent low-carbon treatment and reuse system for rainwater and sewage according to claim 2 is characterized in that: The bioretention module further comprises: a water outlet pipe; The water outlet pipe is communicated with the drain pipe and is used for discharging excess rainwater when the amount of rainwater is greater than a set value.

4. The intelligent low-carbon treatment and reuse system for rainwater and sewage according to claim 2 is characterized in that: The digital control drainage module includes: an ORP electrode, an ORP monitor, a pH electrode, a pH monitor and an electric ball valve; The ORP electrode is used to collect the oxidation-reduction potential data of the treated rainwater and transmit it to the ORP monitor; The ORP monitor is used to receive and display the oxidation-reduction potential data and transmit it to the control module; The pH electrode is used to collect pH data of the treated rainwater and transmit it to the pH monitor; The pH monitor is used to receive and display the pH data and transmit it to the control module; The electric ball valve is installed on the drainage pipe, and is used to receive and discharge the treated rainwater for a preset time period based on the first control signal.

5. The intelligent low-carbon rainwater and sewage treatment and reuse system according to claim 2 is characterized in that: The water inlet tank is in communication with the drainage pipe and is used to store the treated rainwater and supplementary sewage; The overflow tank is used to store the treated rainwater that exceeds the capacity of the inlet tank; The water pipe check valve is lower than the height of the drain pipe and is used to connect the water inlet tank and the overflow tank so that the treated rainwater exceeding the capacity of the water inlet tank flows into the overflow tank in one direction; The overflow port is used to discharge the treated rainwater exceeding the capacity of the overflow tank to the pipe.

6. The intelligent low-carbon rainwater and sewage treatment and reuse system according to claim 5 is characterized in that: The rainwater and sewage collection module further includes: an air pipe one-way valve; The air pipe one-way valve is used to connect the water inlet tank and the overflow tank, and is used to keep the pressure of the water inlet tank and the pressure of the overflow tank the same without generating negative pressure.

7. The intelligent low-carbon rainwater and sewage treatment and reuse system according to claim 5 is characterized in that: The irrigation module includes: a humidity sensor, a spray pump, a nozzle and a water pipe; The humidity sensor is used to collect the soil humidity data of the planting layer and transmit it to the control module; The spray pump is used to receive and pump out the stored water in the water inlet tank and the overflow tank based on the second control signal; The nozzle is used to spray the stored water; One end of the water delivery pipe is connected to the spray pump, and the other end is connected to the water inlet tank and the overflow tank respectively, so as to deliver the water stored in the water inlet tank and the overflow tank.

8. The intelligent low-carbon treatment and reuse system for rainwater and sewage according to claim 1 is characterized in that: The hierarchical power supply control module includes: a solar controller, a solar panel, a battery pack and a rain and snow detector; The solar controller is connected to the solar panel and the battery pack, respectively, and is used to detect the voltage and current of the solar panel in real time, provide battery protection function to prevent overcharging, overdischarging and short circuit, receive and control the battery pack to preferentially supply power to the numerical control drainage module according to the third control signal, and receive and control the battery pack to preferentially supply power to the irrigation module according to the fourth control signal; The solar panel is used to convert solar energy into electrical energy; The battery pack is used to store the electrical energy and to supply power to the digital controlled drainage module, the irrigation module and the control module; The rain and snow detector is used to detect precipitation signals and transmit them to the control module.

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