Small membrane type graded water recycling system and control method thereof

Abstract

This invention relates to the fields of water treatment and membrane separation technology, and discloses a small-scale membrane-based graded water recycling system and its control method. The system includes: controlling the transport of rainwater and sewage to a storage tank based on rainwater level data, sewage flow data, and preset low water level thresholds and sewage discharge flow thresholds; planning the graded treatment process of the membrane treatment module and adjusting the influent flow rate of the membrane graded treatment based on collected water level data, collected water quality data, and preset membrane treatment system start-up water level ranges; controlling the operation of the membrane treatment module based on the water level data in the purified water tank and preset purified water tank full water level thresholds; and adjusting the water supply mode based on purified water tank water quality data, water demand at water points, and preset water quality standard thresholds. This invention can solve the problems of extensive rainwater treatment, inefficient sewage treatment, and high costs, and achieve efficient recycling and reliable supply of prefabricated intelligent micro-space water sources.

Description

Technical Field

[0001] This invention relates to the fields of water treatment and membrane separation technology, and more specifically, to a small-scale membrane-based graded water recycling system and its control method. Background Technology

[0002] In recent years, the development of prefabricated buildings has been rapid, especially the development of mobile micro-spaces, which have quickly occupied various scenarios such as parks, stadiums, office buildings, and tourist attractions. With the increasing demands for public space and the growth of the intelligent mobile outdoor micro-space market, the need for improved environmental systems in prefabricated intelligent micro-spaces is becoming increasingly urgent. The environmental system of prefabricated intelligent micro-spaces mainly includes three parts: air, water, and power, with water being of paramount importance. Currently, water supply in prefabricated intelligent micro-spaces mainly relies on increasing the volume of water storage tanks and manual water replenishment. This increases manpower and operating costs when located in remote outdoor areas without a water source. Therefore, a water recycling system is key to solving the current water supply problem in prefabricated intelligent micro-spaces.

[0003] Traditional water recycling systems typically consist of two parts: a rainwater harvesting system and a wastewater treatment system. Many prefabricated buildings employ rainwater harvesting systems to store and reuse rainwater, such as for toilet flushing and plant irrigation. This approach not only reduces reliance on public water supply systems but also conserves natural resources. For example, some advanced prefabricated building projects utilize well-designed rainwater harvesting and purification systems to use collected rainwater for non-potable purposes within the building, significantly improving water resource utilization efficiency. However, the lack of refined treatment after collection leads to the unusable nature of this water source, resulting in waste. While some existing wastewater treatment methods involve filtration through activated carbon layers for reuse, these methods suffer from short activated carbon lifespans and unsatisfactory filtration effects. Furthermore, the cumbersome steps involved in wastewater treatment, such as sequential anaerobic, anoxic, aerobic, and disinfection tanks, increase the complexity of wastewater treatment, require more space, and raise the production and maintenance costs of prefabricated intelligent micro-spaces. Membrane wastewater treatment technology is a highly efficient wastewater treatment method that combines biological treatment and membrane separation technologies. This technology achieves efficient wastewater treatment and reuse through membrane bioreactors (MBR). MBR technology maintains a certain concentration of microorganisms within the bioreactor, and through the efficient separation of the membrane, converts wastewater into reclaimed water that meets or exceeds the Class IV surface water standard, thus enabling the reuse of urban wastewater. However, the footprint and operating costs of membrane bioreactors are not compatible with prefabricated intelligent spaces.

[0004] Therefore, the development of a small-scale membrane-based graded water recycling system and its control method can overcome the problems of extensive rainwater treatment, complex and inefficient sewage treatment, high cost, and water supply difficulties in remote areas in the existing technology, and realize the efficient recycling and reliable supply of prefabricated intelligent micro-space water sources. Summary of the Invention

[0005] In view of this, the present invention proposes a small-scale membrane-based graded water recycling system and its control method, aiming to provide a small-scale membrane-based graded water recycling control method to overcome the problems of extensive rainwater treatment, complex and inefficient sewage treatment, high cost, and difficulty in water supply in remote areas in the prior art, and to realize efficient recycling and reliable supply of prefabricated intelligent micro-space water sources.

[0006] In one aspect, the present invention proposes a small-scale membrane-based staged water recycling control method, comprising:

[0007] Real-time monitoring of rainwater level data from the rainwater harvesting module and sewage flow data from the sewage collection module;

[0008] Based on the rainwater level data, sewage flow data, and preset low water level thresholds and sewage discharge flow thresholds, rainwater and sewage are controlled to be transported to the storage tank.

[0009] Real-time monitoring of water level and water quality data in the water storage tank; based on the water level and water quality data and the preset water level range of the membrane treatment system, the tiered treatment process of the membrane treatment module is planned and the influent flow rate of the membrane tiered treatment is adjusted.

[0010] The water collected after membrane grading is collected into a water purification tank and the water level data in the tank is collected in real time.

[0011] The operation of the membrane treatment module is controlled based on the water level data in the water tank and the preset full water level threshold of the water tank.

[0012] Real-time monitoring of water quality data in the water purification tank; adjustment of water supply mode based on water quality data in the water purification tank, water demand at water points and preset water quality standard thresholds.

[0013] The membrane cleaning and water tank cleaning processes are automatically initiated based on system uptime, water quality data in the purification tank, and system operating status.

[0014] Furthermore, the process of controlling the transport of rainwater and sewage to the storage tank based on the aforementioned rainwater level data, sewage flow data, and preset low water level thresholds and sewage discharge flow thresholds includes:

[0015] When the rainwater level data reaches the preset low water level threshold, the rainwater is controlled to be transported to the water storage tank.

[0016] When the sewage flow rate data reaches the sewage discharge flow rate threshold, the sewage is controlled to be transported to the storage tank.

[0017] Furthermore, based on the collected water level data, collected water quality data, and the preset membrane treatment system start-up water level range, the process of planning the graded treatment flow of the membrane treatment module and adjusting the influent flow rate of the membrane graded treatment includes:

[0018] When the water level in the storage tank reaches the preset start-up water level range of the membrane treatment system, the graded treatment process of the membrane treatment module is planned based on the collected water quality data.

[0019] Among them, when planning the graded treatment process of the membrane treatment module based on the collected water quality data:

[0020] Real-time monitoring of turbidity data and pollutant content data in the collected water, and selection of membrane grading treatment levels based on preset turbidity range and pollutant content range;

[0021] If the turbidity data of the collected water is greater than the preset turbidity range or the pollutant content data of the sewage is greater than the pollutant content range of the sewage, then select the first-stage microfiltration treatment.

[0022] If the turbidity data of the collected water is within the preset turbidity range and the pollutant content data of the wastewater is within the wastewater pollutant content range, then select secondary ultrafiltration treatment.

[0023] If the turbidity data of the collected water is less than the preset turbidity range and the pollutant content data of the wastewater is less than the pollutant content range of the wastewater, then three-stage nanofiltration treatment is selected.

[0024] When the water level in the storage tank does not reach the preset starting water level range for the membrane treatment system, rainwater and sewage will continue to be collected, and the water level in the storage tank will be monitored in real time.

[0025] Furthermore, the process of planning the graded treatment flow of the membrane treatment module and adjusting the influent flow rate of the membrane graded treatment based on the collected water level data, collected water quality data, and the preset membrane treatment system start-up water level range also includes:

[0026] Based on the collected water level data and collected water quality data, the influent flow rate for membrane staged treatment is preliminarily determined.

[0027] If the water level exceeds the start-up water level range of the membrane treatment system and the pollutant content of the wastewater is less than the pollutant content range of the wastewater, then increase the influent flow rate of the membrane staged treatment.

[0028] If the collected water level is lower than the start-up water level range of the membrane treatment system or the wastewater pollutant content exceeds the wastewater pollutant content range, the influent flow rate of the membrane staged treatment should be reduced.

[0029] Furthermore, based on the water level data in the water tank and the preset water tank full water level threshold, the membrane treatment module is controlled to stop operating when the water level data in the water tank reaches the preset water tank full water level threshold.

[0030] During the process of controlling the membrane processing module to stop operating:

[0031] If there are unfinished processing steps in the membrane processing module, if the remaining processing time for that step is less than the preset processing time, the module will continue to complete that step and then stop; if the remaining processing time exceeds the preset processing time, the module will stop directly and record the relevant data.

[0032] If, after the membrane treatment module stops operating, the water level in the purified water tank drops to the preset purified water volume value within a short period of time, and the water level in the storage tank reaches the starting water level range of the membrane treatment system, a decision will be made on whether to immediately start the membrane treatment module based on the system's operating status.

[0033] Furthermore, the process of real-time monitoring of water quality data within the water purification tank, and adjusting the water supply method based on the water quality data, water demand at the water usage point, and preset water quality standard thresholds, includes:

[0034] When the water quality data in the water tank reaches the preset water quality standard threshold and there is a water demand at the water point, water will be supplied in the normal water supply mode, and the flow rate of the flow valve will be adjusted according to the water demand.

[0035] When the water quality data in the water tank fails to meet the preset water quality standard threshold, but there is a water demand at the point of use, the system will switch to the backup water supply mode.

[0036] Furthermore, when the water quality data in the purified water tank fails to meet the preset water quality standard threshold, but there is a water demand at the point of use, the process of switching to the backup water supply mode includes:

[0037] Classify backup water supply methods;

[0038] Record the different deviations of water quality data from preset water quality standard thresholds in different types of water purification tanks;

[0039] Select the corresponding backup water supply method based on the different situations described above;

[0040] If the water supply effect is not good after switching water supply methods, when the number of feedback reaches the preset number, the backup water supply method will be rematched based on the water quality data in the water tank.

[0041] Furthermore, based on system uptime, water quality data in the purified water tank, and system operating status, the process of automatically initiating membrane cleaning and water tank cleaning includes:

[0042] When the system runs for the preset duration and the water quality data in the purified water tank is lower than the preset minimum water quality standard or the system operation status is abnormal, the membrane cleaning and water tank cleaning will be automatically activated.

[0043] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0044] This invention monitors rainwater level data and sewage flow data in real time and controls the delivery based on preset thresholds. It ensures that delivery is only carried out when rainwater reaches a certain amount and sewage is generated to an appropriate level, avoiding rainwater waste and unreasonable sewage discharge, improving the collection rate of rainwater and sewage, and making more efficient use of water resources.

[0045] This application can select the appropriate membrane treatment level based on water quality data, and can also adjust the flow rate according to the water level, which improves the treatment targeting and overall efficiency as well as the quality of the effluent. This enables the recycled water to meet the water demand of non-potable scenarios in prefabricated intelligent micro-spaces and reduces dependence on external water sources.

[0046] This application monitors water quality data from the water purification tank in real time and adjusts the water supply method according to water quality, water demand, and standard thresholds. It can meet different water needs, ensure water supply quality and reliability, and improve user experience.

[0047] This application automatically initiates membrane cleaning and water tank cleaning, which greatly reduces operation and maintenance costs and the intensity of manual operation, and improves the reliability and adaptability of the system.

[0048] On the other hand, the present invention also proposes a small-scale membrane-based graded water recycling system, comprising: a control module, a rainwater collection module, a sewage collection module, a water storage tank, a membrane treatment module, a clean water tank, and a cleaning module;

[0049] The rainwater harvesting module is used to collect rainwater from the roof and transport the collected rainwater to a storage tank;

[0050] The wastewater collection module is used to collect indoor wastewater and transport the collected wastewater to a storage tank;

[0051] The water storage tank is used to store collected rainwater and sewage;

[0052] The membrane treatment module is used to perform membrane grading treatment on the collected rainwater and sewage, and to transport the membrane-graded rainwater and sewage to the clean water tank.

[0053] The water tank is used to store rainwater and wastewater after membrane grading treatment;

[0054] The cleaning module is used to clean the water storage tank, membrane treatment module and clean water tank;

[0055] The control module is connected to the rainwater collection module, sewage collection module, water storage tank, membrane treatment module, clean water tank, and cleaning module respectively, and controls the operation of the rainwater collection module, sewage collection module, water storage tank, membrane treatment module, clean water tank, and cleaning module.

[0056] Furthermore, the control module includes a data detection unit and a backup water supply device;

[0057] The data detection unit is used to monitor in real time the rainwater level data of the rainwater collection module, the sewage flow data of the sewage collection module, the water level data and water quality data in the water storage tank, and the water level data and water quality data in the water purification tank; the backup water supply device is used to provide backup water supply methods.

[0058] The rainwater harvesting module includes a rainwater pump and a roof gutter.

[0059] The sewage collection module includes a handwashing basin, a shower basin, and a sewage valve.

[0060] It is understood that the small-scale membrane-based graded water recycling system and its control method in the above embodiments of the present invention have the same beneficial effects, and will not be described again. Attached Figure Description

[0061] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0062] Figure 1 A flowchart of a small-scale membrane-based graded water recycling control method provided in an embodiment of the present invention;

[0063] Figure 2 This is a functional block diagram of a small-scale membrane-based graded water recycling system provided in an embodiment of the present invention. Detailed Implementation

[0064] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, embodiments and features in the embodiments of the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0065] Traditional water recycling systems typically consist of two parts: a rainwater harvesting system and a wastewater treatment system. Many prefabricated buildings employ rainwater harvesting systems to store and reuse rainwater, such as for toilet flushing and plant irrigation. This approach not only reduces reliance on public water supply systems but also conserves natural resources. For example, some advanced prefabricated building projects utilize well-designed rainwater harvesting and purification systems to use collected rainwater for non-potable purposes within the building, significantly improving water resource utilization efficiency. However, the lack of refined treatment after collection leads to the unusable nature of this water source, resulting in waste. While some existing wastewater treatment methods involve filtration through activated carbon layers for reuse, these methods suffer from short activated carbon lifespans and unsatisfactory filtration effects. Furthermore, the cumbersome steps involved in wastewater treatment, such as sequential anaerobic, anoxic, aerobic, and disinfection tanks, increase the complexity of wastewater treatment, require more space, and raise the production and maintenance costs of prefabricated intelligent micro-spaces. Membrane wastewater treatment technology is a highly efficient wastewater treatment method that combines biological treatment and membrane separation technologies. This technology achieves efficient wastewater treatment and reuse through membrane bioreactors (MBR). MBR technology maintains a certain concentration of microorganisms within the bioreactor, and through the efficient separation of the membrane, converts wastewater into reclaimed water that meets or exceeds the Class IV surface water standard, thus enabling the reuse of urban wastewater. However, the footprint and operating costs of membrane bioreactors are not compatible with prefabricated intelligent spaces.

[0066] Therefore, developing a small-scale membrane-based graded water recycling system and its control method can overcome the problems of extensive rainwater treatment, complex and inefficient sewage treatment, high cost, and water supply difficulties in remote areas in existing technologies, and realize the efficient recycling and reliable supply of prefabricated intelligent micro-space water sources, which has important practical significance.

[0067] Reference Figure 1 In some embodiments of this application, a small-scale membrane-based staged water recycling control method includes:

[0068] S1. Real-time monitoring of rainwater level data from the rainwater harvesting module and sewage flow data from the sewage collection module;

[0069] S2. Based on the rainwater level data, sewage flow data, and preset low water level threshold and sewage discharge flow threshold, control the transport of rainwater and sewage to the storage tank;

[0070] S3. Monitor the water level and water quality data in the water storage tank in real time, and based on the water level and water quality data, and the preset membrane treatment system start water level range, plan the graded treatment process of the membrane treatment module and adjust the inlet flow rate of the membrane graded treatment.

[0071] S4. Collect the water after membrane grading into the water purification tank and collect the water level data in the water purification tank in real time.

[0072] S5. Control the operation of the membrane treatment module based on the water level data in the water tank and the preset full water level threshold of the water tank;

[0073] S6. Monitor the water quality data in the water purification tank in real time, and adjust the water supply mode based on the water quality data in the water purification tank, the water demand of the water point, and the preset water quality standard threshold.

[0074] S7. Based on system running time, water quality data in the water tank, and system operating status, the membrane cleaning and water tank cleaning will be automatically started.

[0075] Specifically, the rainwater harvesting module collects rainwater from the roof, while the sewage collection module collects domestic sewage through handwashing sinks and showers.

[0076] Understandably, real-time monitoring of rainwater level data allows for timely understanding of dynamic changes in rainwater collection volume, enabling subsequent rational scheduling of rainwater transport based on water level conditions and improving the efficiency of rainwater collection and utilization. Real-time monitoring of wastewater flow data accurately reveals the rate of wastewater generation, providing a basis for controlling the timing of wastewater transport and ensuring the timeliness of wastewater collection and treatment.

[0077] Specifically, when the rainwater level reaches a preset low water level threshold, the rainwater pump in the rainwater collection module is activated to transport rainwater to the storage tank; when the sewage flow rate reaches a sewage discharge flow rate threshold, the sewage valve in the sewage collection module is opened to allow sewage to flow into the storage tank. In this way, rainwater and sewage are collected and stored in a reasonable manner.

[0078] Understandably, controlling rainwater transport based on water level thresholds ensures timely collection when rainwater reaches a certain volume, preventing waste and guaranteeing a continuous and stable rainwater source for the storage tank. Similarly, controlling sewage transport based on sewage flow thresholds effectively manages sewage discharge timing, preventing excessive accumulation in the collection module and ensuring the storage tank can receive sewage for subsequent treatment as needed.

[0079] Specifically, the system monitors the collected water level in real time and tests various water quality indicators. By monitoring the turbidity and pollutant content of the collected water in real time, the membrane grading treatment level is selected based on the preset turbidity and pollutant content ranges. This determines whether to use primary microfiltration, secondary ultrafiltration, or tertiary nanofiltration. The influent flow rate for the membrane grading treatment is also preliminarily determined based on the collected water level and water quality data.

[0080] Understandably, real-time monitoring of water level and quality data in the storage tank allows for the rational planning of the membrane treatment process and adjustment of the influent flow rate based on actual conditions. This enables the membrane treatment module to efficiently treat different water qualities and quantities, improving the targeting and efficiency of the treatment and ensuring the treatment effect.

[0081] Specifically, the system collects real-time data on the water level and water quality within the purification tank. When the water level in the tank reaches the preset full-water-level threshold, the control module stops the membrane treatment module from operating.

[0082] Understandably, real-time monitoring of the water level and quality in the water purification tank, and control of the membrane treatment module operation based on the water level, can prevent the system from running idle and water resources from overflowing and being wasted.

[0083] It can be seen that adjusting the water supply method according to water quality and water demand ensures the stability and reliability of water supply and meets water demand under different circumstances.

[0084] As can be seen, the automatic start of cleaning based on system running time, water quality and status can promptly remove impurities and contaminants from the equipment, prevent equipment blockage and performance degradation, extend equipment life, maintain long-term stable and efficient system operation, and reduce the cost and workload of frequent manual inspection and maintenance.

[0085] Reference Figure 1 In some embodiments of this application, the process of planning the graded treatment process of the membrane treatment module and adjusting the influent flow rate of the membrane graded treatment based on the collected water level data, collected water quality data, and a preset membrane treatment system water level range includes:

[0086] When the water level in the storage tank reaches the preset start-up water level range of the membrane treatment system, the tiered treatment process of the membrane treatment module is planned based on the collected water quality data; when the water level in the storage tank does not reach the preset start-up water level range of the membrane treatment system, rainwater and sewage are collected and the water level in the storage tank is monitored in real time.

[0087] Specifically, when planning the graded treatment process of the membrane treatment module based on the collected water quality data:

[0088] The system monitors the turbidity data of the collected water and the pollutant content data of the wastewater in real time, and selects the membrane grading treatment level based on the preset turbidity range and wastewater pollutant content range.

[0089] Specifically, if the turbidity data of the collected water is greater than the preset turbidity range or the pollutant content data of the wastewater is greater than the pollutant content range, then primary microfiltration treatment is selected; if the turbidity data of the collected water is within the preset turbidity range and the pollutant content data of the wastewater is within the pollutant content range, then secondary ultrafiltration treatment is selected; if the turbidity data of the collected water is less than the preset turbidity range and the pollutant content data of the wastewater is less than the pollutant content range, then tertiary nanofiltration treatment is selected.

[0090] It is understandable that when the water quality is poor, primary microfiltration is chosen. Primary microfiltration uses microfiltration membranes with relatively large pore sizes, which can effectively remove large particulate impurities, protect the subsequent membrane treatment components from being blocked or damaged by large particles, improve the overall service life of the membrane treatment module, and at the same time preliminarily purify the water quality, laying the foundation for subsequent treatment.

[0091] Understandably, when water quality is at a moderate level, choosing secondary ultrafiltration treatment is appropriate. Ultrafiltration membranes have smaller pore sizes than microfiltration membranes, which can further filter out smaller particles of impurities, bacteria, viruses, and other pollutants, thereby further improving water quality and meeting the water demand for relatively high water quality. This approach makes reasonable use of the advantages of different membrane treatment levels to improve treatment efficiency and effectiveness.

[0092] Understandably, when water quality is good, three-stage nanofiltration is chosen. Nanofiltration membranes can perform finer filtration of collected water, removing smaller molecules of pollutants and some ions, deeply purifying the water quality to meet the extremely high demands of domestic water use, fully utilizing the function of the membrane treatment module, and improving the utilization value of water resources.

[0093] Understandably, when the water level in the storage tank does not reach the preset starting water level range for the membrane treatment system, the rainwater collection module and the sewage collection module continue to work, continuously collecting rainwater and sewage, while monitoring the water level in the storage tank in real time, and waiting for the water level to reach the appropriate range before starting the tiered treatment process of the membrane treatment module.

[0094] It can be seen that continuous collection and monitoring when the water level is below the activation range prevents the membrane treatment module from starting when the water volume is insufficient, which would result in low treatment efficiency or energy waste. This ensures that the treatment process can be started in time when there is sufficient water, thus maintaining the stable operation of the system.

[0095] Reference Figure 1 In some embodiments of this application, the process of planning the graded treatment process of the membrane treatment module and adjusting the influent flow rate of the membrane graded treatment based on the collected water level data, collected water quality data and the preset membrane treatment system water level range planning process further includes: preliminarily determining the influent flow rate of the membrane graded treatment based on the collected water level data and collected water quality data.

[0096] Understandably, after determining the tiered treatment process of the membrane treatment module, an initial influent flow rate is calculated using a specific algorithm based on the current water level and approximate water quality in the storage tank, combined with factors such as the treatment capacity of the membrane treatment module.

[0097] Specifically, if the collected water level exceeds the start-up water level range of the membrane treatment system and the wastewater pollutant content is less than the wastewater pollutant content range, the influent flow rate of the membrane staged treatment will be increased; if the collected water level is less than the start-up water level range of the membrane treatment system or the wastewater pollutant content exceeds the wastewater pollutant content range, the influent flow rate of the membrane staged treatment will be reduced.

[0098] Understandably, when the water in the storage tank is sufficient and the water quality is good, the membrane treatment module has greater processing potential. Therefore, it is appropriate to increase the influent flow rate of the membrane grading treatment to speed up the processing speed, improve the overall operating efficiency of the system, and process and transport the water in the storage tank to the clean water tank as soon as possible while ensuring the treatment effect.

[0099] It can be seen that increasing the influent flow rate when the water volume is sufficient and the water quality is good can make full use of the membrane treatment module's processing capacity, shorten the processing time, improve the system's operating efficiency, meet water demand more quickly, and at the same time avoid unnecessary water resources staying and waiting in the storage tank, thereby improving the turnover efficiency of water resources.

[0100] Understandably, insufficient water volume or poor water quality may pose a risk of excessive processing pressure or ineffective treatment for the membrane treatment module. In such cases, reducing the influent flow rate of the membrane staged treatment system is crucial to protect the module, prevent excessive wear and tear on the membrane components due to excessive water volume or poor water quality, extend the module's lifespan, and ensure stable operation to guarantee that the treated water meets basic requirements.

[0101] It can be seen that reducing the influent flow rate when the water volume is insufficient or the water quality is poor can effectively protect the membrane treatment module, reduce membrane damage caused by improper flow, reduce equipment replacement and maintenance costs, and at the same time ensure the stable operation of the membrane treatment module and maintain the system's basic water treatment capacity.

[0102] Reference Figure 1 In some embodiments of this application, the operation of the membrane processing module is controlled based on the water level data in the water tank and the preset water tank full water level threshold. When the water level data in the water tank reaches the preset water tank full water level threshold, the membrane processing module stops operating.

[0103] Specifically, during the process of controlling the membrane processing module to stop operating: if there are unfinished processing steps in the membrane processing module, if the remaining processing time for that step is less than the preset processing time, then continue to complete that step and stop; if the remaining processing time exceeds the preset processing time, stop directly and record the relevant data.

[0104] Specifically, after the membrane treatment module stops operating, if the water level in the purified water tank drops to the preset purified water volume value within a short period of time, and the water level in the storage tank reaches the starting water level range of the membrane treatment system, the system determines whether to immediately start the membrane treatment module based on the system operation status; when the data fed back by the water level sensor in the purified water tank shows that the water level reaches the preset full water level threshold of the purified water tank, the control module immediately sends a stop operation command to the membrane treatment module.

[0105] Understandably, continuing to complete steps when the remaining processing time is short ensures the integrity of the membrane treatment process, preventing substandard water quality due to sudden stops, guaranteeing that the final treated water meets requirements, and improving the reliability of the system. When the remaining processing time exceeds the preset duration, the membrane treatment module is stopped directly, and relevant data such as the current processing step and membrane module operating parameters are recorded. This recorded data can provide a reference for subsequent analysis of the membrane treatment module's operation, troubleshooting, and recovery.

[0106] It can be seen that stopping and recording data directly when the remaining processing time is too long can avoid unnecessary operation of the membrane processing module, save energy, and provide detailed data for subsequent maintenance and troubleshooting, making it easier to quickly locate and solve problems and improve the maintainability of the system.

[0107] Understandably, the control module will comprehensively consider the current operating status of the system, such as whether there are potential faults in the membrane treatment module and whether other modules are functioning normally, to determine whether to immediately start the membrane treatment module. If the system is operating normally overall and it is determined that it is necessary to replenish the water tank in a timely manner, the membrane treatment module will be started to ensure the stability and timeliness of the water supply; if there are some abnormalities in the system that need to be investigated or dealt with first, the start of the membrane treatment module will be delayed until the problem is resolved.

[0108] It can be seen that the decision to start the membrane treatment module is based on the drop in water level in the clean water tank and the water level in the storage tank, combined with the overall operating status of the system. This allows the system to flexibly adapt to actual water usage and collection conditions, avoid damage to the equipment caused by frequent start-ups and shutdowns, ensure stable and timely water supply, and improve the reliability and stability of the system operation.

[0109] Reference Figure 1In some embodiments of this application, the process of real-time monitoring of water quality data in the water purification tank and adjusting the water supply mode based on the water quality data in the water purification tank, the water demand at the water point, and a preset water quality standard threshold includes: when the water quality data in the water purification tank reaches the preset water quality standard threshold and the water point has a water demand, water is supplied in the conventional water supply mode, and the flow rate of the flow valve is adjusted according to the water demand; when the water quality data in the water purification tank does not reach the preset water quality standard threshold, but the water point has a water demand, the system switches to the backup water supply mode.

[0110] Understandably, if the water point is a faucet in a resident's home used for daily washing and requires a small flow of water, the control module will adjust the flow valve to a smaller opening to provide a suitable amount of water. If it is a water point for irrigation of green spaces in the community, which requires a larger flow of water, the control module will correspondingly increase the opening of the flow valve to meet the irrigation needs. Under the premise of ensuring water quality, the flow rate is reasonably adjusted to avoid water waste.

[0111] It can be seen that when the water quality meets the standards and there is a demand for water, the conventional water supply method and the flow rate can be adjusted as needed to meet the actual needs of different water use points, avoid water waste, improve the efficiency of water resource utilization, and ensure the stability and reliability of water supply.

[0112] Understandably, when the level of a certain pollutant in the water in the water purification tank exceeds the standard and does not meet the drinking requirements of residents, but residents still have a need for water, the system will switch to the backup water supply pipeline and supply water from the backup water source to the water point to ensure that the water point has a water supply under any circumstances, thereby improving the safety and reliability of the water supply and avoiding the impact of water quality problems on residents' normal lives.

[0113] It can be seen that switching to the backup water supply mode when the water quality does not meet the standards can effectively ensure the normal water supply at the water point, avoid inconvenience caused by water quality problems, and improve the emergency response capability and reliability of the water supply system.

[0114] Reference Figure 1 In some embodiments of this application, when the water quality data in the purified water tank does not meet the preset water quality standard threshold, but there is a water demand at the water point, the process of switching to the backup water supply mode includes:

[0115] The backup water supply methods are classified; different situations are recorded where the water quality data in the water purification tank deviates from the preset water quality standard threshold for different categories; the corresponding backup water supply method is selected based on the different situations; after switching the water supply method, if the water point reports poor water use effect, when the number of feedback reaches the preset number of feedback, the backup water supply method is re-matched based on the water quality data in the water purification tank.

[0116] Specifically, backup water supplies can be categorized according to their source, such as municipal water supply or water from community water tanks; or they can be categorized according to their pressure, water quality, and other characteristics. For example, backup water supplies with stable pressure and relatively good water quality can be grouped into one category, while those with large pressure fluctuations and average water quality can be grouped into another.

[0117] It is understandable that classifying backup water supply methods facilitates clear management and selection of appropriate backup water supply solutions, thereby improving the flexibility and effectiveness of responding to situations where water quality does not meet standards.

[0118] Specifically, based on the classification, when the microbial content in the water in the purification tank exceeds the standard, the water usage effect and water quality changes under various backup water supply methods are recorded; when the heavy metal content in the water exceeds the standard, the corresponding data are also recorded. By accumulating this data over a long period, a correlation is established between the deviation of water quality in the purification tank and the effectiveness of backup water supply methods.

[0119] Understandably, recording deviations in water quality data can provide detailed and accurate information for selecting appropriate backup water supply methods, enabling the system to quickly find more suitable backup water supply solutions based on different water quality issues and improve the effectiveness of backup water supply.

[0120] Specifically, when the water quality in the water tank is only slightly turbid and the indicators such as microorganisms are basically up to standard, choose the backup water supply method that has a better effect on turbidity treatment; when the heavy metal content in the water is seriously excessive, choose the backup water supply method that can effectively filter heavy metals.

[0121] It can be seen that selecting a backup water supply method based on different water quality conditions can meet the water quality and quantity needs of water users to the greatest extent, improve the pertinence and effectiveness of backup water supply, and ensure the normal water use experience of water users.

[0122] It can be seen that by rematching the backup water supply method based on user feedback, problems with the backup water supply method can be identified and resolved in a timely manner, the water supply plan can be continuously optimized, user satisfaction with the water supply system can be improved, and the practicality and adaptability of the water supply system can be enhanced.

[0123] Reference Figure 1 In some embodiments of this application, the process of automatically starting membrane cleaning and water tank cleaning based on system running time, water quality data in the water tank and system operating status includes: automatically starting membrane cleaning and water tank cleaning when the system running time reaches a preset running time and the water quality data in the water tank is lower than the preset minimum water quality standard value or the system operating status is abnormal.

[0124] Specifically, the system continuously records operating time while monitoring water quality data and system operating status in the purification tank. When the content of key pollutants in the water exceeds the maximum allowable value, or when the system operating status becomes abnormal, such as a sudden abnormal increase in the operating pressure of the membrane treatment module or abnormal noise from the equipment, the membrane cleaning and water tank cleaning programs are automatically initiated.

[0125] It can be seen that automatic cleaning can remove accumulated impurities and contaminants in the equipment in a timely manner, prevent the growth of contaminants in the water storage tank from affecting water quality, restore the filtration performance of the membrane treatment module, ensure the cleanliness of the water tank, extend the service life of the equipment, maintain the efficient and stable operation of the system, reduce the workload and cost of frequent manual cleaning, and improve the automation level and reliability of the system.

[0126] As can be seen, this invention monitors rainwater level data and sewage flow data in real time, and controls the delivery according to preset thresholds. This ensures that delivery is only carried out when rainwater reaches a certain amount and sewage is generated to an appropriate level, avoiding rainwater waste and unreasonable sewage discharge, improving the collection rate of rainwater and sewage, and making more efficient use of water resources.

[0127] This application can select the appropriate membrane treatment level based on water quality data, and can also adjust the flow rate according to the water level, which improves the treatment targeting and overall efficiency as well as the quality of the effluent. This enables the recycled water to meet the water demand of non-potable scenarios in prefabricated intelligent micro-spaces and reduces dependence on external water sources.

[0128] This application monitors water quality data from the water purification tank in real time and adjusts the water supply method according to water quality, water demand, and standard thresholds. It can meet different water needs, ensure water supply quality and reliability, and improve user experience.

[0129] This application automatically initiates membrane cleaning and water tank cleaning, which greatly reduces operation and maintenance costs and the intensity of manual operation, and improves the reliability and adaptability of the system.

[0130] In another preferred embodiment based on the above embodiments, see [reference] Figure 2 As shown, this embodiment provides a small-scale membrane-based graded water recycling system, including: a control module, a rainwater collection module, a wastewater collection module, a water storage tank, a membrane treatment module, a clean water tank, and a cleaning module.

[0131] Specifically, the rainwater harvesting module is used to collect rainwater from the roof; the wastewater collection module is used to collect indoor wastewater; the water storage tank is used to store the collected rainwater and wastewater; the membrane treatment module is used to perform membrane stratification treatment on the collected rainwater and wastewater; the clean water tank is used to store the rainwater and wastewater after membrane stratification treatment; the cleaning module is used to clean the water storage tank, the membrane treatment module, and the clean water tank; and the control module is connected to the rainwater harvesting module, the wastewater collection module, the water storage tank, the membrane treatment module, the clean water tank, and the cleaning module, and controls the operation of the rainwater harvesting module, the wastewater collection module, the water storage tank, the membrane treatment module, the clean water tank, and the cleaning module.

[0132] Specifically, the water purification tank is a wall-mounted tank, and the base of the water storage tank is a sunken groove sedimentation tank.

[0133] See Figure 2 As shown, in some embodiments of this application, the control module includes a data detection unit and a backup water supply device.

[0134] Specifically, the data detection unit is used to monitor in real time the rainwater level data of the rainwater collection module, the sewage flow data of the sewage collection module, the water level data and water quality data in the water storage tank, and the water level data and water quality data in the clean water tank; the backup water supply device is used to provide backup water supply methods.

[0135] Specifically, the rainwater harvesting module includes a rainwater pump and a roof gutter; the sewage collection module includes a handwashing basin, a shower basin, and a sewage valve.

[0136] It is understood that, in the above embodiments of the present invention, a small-scale membrane-based graded water recycling system and its control method have the same beneficial effects, and will not be described again.

[0137] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program goods. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program goods embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0138] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program goods according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0139] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0140] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0141] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A small-scale membrane-based staged water treatment and recycling control method, characterized in that: Real-time monitoring of rainwater level data from the rainwater harvesting module and sewage flow data from the sewage collection module; Based on the rainwater level data, sewage flow data, and preset low water level thresholds and sewage discharge flow thresholds, rainwater and sewage are controlled to be transported to the storage tank. Real-time monitoring of water level and water quality data in the water storage tank; based on the water level and water quality data and the preset water level range of the membrane treatment system, the tiered treatment process of the membrane treatment module is planned and the influent flow rate of the membrane tiered treatment is adjusted. The water collected after membrane grading is collected into a water purification tank and the water level data in the tank is collected in real time. The operation of the membrane treatment module is controlled based on the water level data in the water tank and the preset full water level threshold of the water tank. Real-time monitoring of water quality data in the water purification tank; adjustment of water supply mode based on water quality data in the water purification tank, water demand at water points and preset water quality standard thresholds. The membrane cleaning and water tank cleaning processes are automatically initiated based on system uptime, water quality data in the purification tank, and system operating status.

2. The small-scale membrane-based staged water recycling control method according to claim 1, characterized in that, The process of controlling the transport of rainwater and sewage to the storage tank based on the aforementioned rainwater level data, sewage flow data, and preset low water level thresholds and sewage discharge flow thresholds includes: When the rainwater level data reaches the preset low water level threshold, the rainwater is controlled to be transported to the water storage tank. When the sewage flow rate data reaches the sewage discharge flow rate threshold, the sewage is controlled to be transported to the storage tank.

3. The small-scale membrane-based graded water recycling control method according to claim 2, characterized in that, Based on the collected water level data, collected water quality data, and the preset membrane treatment system start-up water level range, the process of planning the graded treatment flow of the membrane treatment module and adjusting the influent flow rate of the membrane graded treatment includes: When the water level in the storage tank reaches the preset start-up water level range of the membrane treatment system, the graded treatment process of the membrane treatment module is planned based on the collected water quality data. Among them, when planning the graded treatment process of the membrane treatment module based on the collected water quality data: Real-time monitoring of turbidity data and pollutant content data in the collected water, and selection of membrane grading treatment levels based on preset turbidity range and pollutant content range; If the turbidity data of the collected water is greater than the preset turbidity range or the pollutant content data of the sewage is greater than the pollutant content range of the sewage, then select the first-stage microfiltration treatment. If the turbidity data of the collected water is within the preset turbidity range and the pollutant content data of the wastewater is within the wastewater pollutant content range, then select secondary ultrafiltration treatment. If the turbidity data of the collected water is less than the preset turbidity range and the pollutant content data of the wastewater is less than the pollutant content range of the wastewater, then three-stage nanofiltration treatment is selected. When the water level in the storage tank does not reach the preset starting water level range for the membrane treatment system, rainwater and sewage will continue to be collected, and the water level in the storage tank will be monitored in real time.

4. The small-scale membrane-based graded water recycling control method according to claim 3, characterized in that, Based on the collected water level data, collected water quality data, and the preset membrane treatment system start-up water level range, the process of planning the graded treatment flow of the membrane treatment module and adjusting the influent flow rate of the membrane graded treatment also includes: Based on the collected water level data and collected water quality data, the influent flow rate for membrane staged treatment is preliminarily determined. If the water level exceeds the start-up water level range of the membrane treatment system and the pollutant content of the wastewater is less than the pollutant content range of the wastewater, then increase the influent flow rate of the membrane staged treatment. If the collected water level is lower than the start-up water level range of the membrane treatment system or the wastewater pollutant content exceeds the wastewater pollutant content range, the influent flow rate of the membrane staged treatment should be reduced.

5. The small-scale membrane-based staged water recycling control method according to claim 1, characterized in that, The membrane treatment module is controlled based on the water level data in the water tank and the preset water tank full water level threshold. When the water level data in the water tank reaches the preset water tank full water level threshold, the membrane treatment module is controlled to stop running. During the process of controlling the membrane processing module to stop operating: If there are unfinished processing steps in the membrane processing module, if the remaining processing time for that step is less than the preset processing time, the module will continue to complete that step and then stop; if the remaining processing time exceeds the preset processing time, the module will stop directly and record the relevant data. If, after the membrane treatment module stops operating, the water level in the purified water tank drops to the preset purified water volume value within a short period of time, and the water level in the storage tank reaches the starting water level range of the membrane treatment system, a decision will be made on whether to immediately start the membrane treatment module based on the system's operating status.

6. The small-scale membrane-based graded water recycling control method according to claim 1, characterized in that, The process of real-time monitoring of water quality data in the water purification tank, and adjusting the water supply mode based on the water quality data in the water purification tank, the water demand at the water point, and preset water quality standard thresholds, includes: When the water quality data in the water tank reaches the preset water quality standard threshold and there is a water demand at the water point, water will be supplied in the normal water supply mode, and the flow rate of the flow valve will be adjusted according to the water demand. When the water quality data in the water tank fails to meet the preset water quality standard threshold, but there is a water demand at the point of use, the system will switch to the backup water supply mode.

7. The small-scale membrane-based staged water recycling control method according to claim 6, characterized in that, When the water quality data in the purified water tank fails to meet the preset water quality standard threshold, but there is a water demand at the point of use, the process of switching to the backup water supply mode includes: Classify backup water supply methods; Record the different deviations of water quality data from preset water quality standard thresholds in different types of water purification tanks; Select the corresponding backup water supply method based on the different situations described above; If the water supply effect is not good after switching water supply methods, when the number of feedback reaches the preset number, the backup water supply method will be rematched based on the water quality data in the water tank.

8. The small-scale membrane-based staged water recycling control method according to claim 1, characterized in that, The process of automatically initiating membrane cleaning and water tank cleaning based on system uptime, water quality data in the purified water tank, and system operating status includes: When the system runs for the preset duration and the water quality data in the purified water tank is lower than the preset minimum water quality standard or the system operation status is abnormal, the membrane cleaning and water tank cleaning will be automatically activated.

9. A small-scale membrane-based graded water recycling system, applicable to the small-scale membrane-based graded water recycling control method as described in any one of claims 1-8, characterized in that, include: Control module, rainwater collection module, sewage collection module, water storage tank, membrane treatment module, clean water tank, and cleaning module; The rainwater harvesting module is used to collect rainwater from the roof and transport the collected rainwater to a storage tank; The wastewater collection module is used to collect indoor wastewater and transport the collected wastewater to a storage tank; The water storage tank is used to store collected rainwater and sewage; The membrane treatment module is used to perform membrane grading treatment on the collected rainwater and sewage, and to transport the membrane-graded rainwater and sewage to the clean water tank. The water tank is used to store rainwater and wastewater after membrane grading treatment; The cleaning module is used to clean the water storage tank, membrane treatment module and clean water tank; The control module is connected to the rainwater collection module, sewage collection module, water storage tank, membrane treatment module, clean water tank, and cleaning module respectively, and controls the operation of the rainwater collection module, sewage collection module, water storage tank, membrane treatment module, clean water tank, and cleaning module.

10. A small-scale membrane-based graded water recycling system according to claim 9, characterized in that, The control module includes a data detection unit and a backup water supply device; The data detection unit is used to monitor in real time the rainwater level data of the rainwater collection module, the sewage flow data of the sewage collection module, the water level data and water quality data in the water storage tank, and the water level data and water quality data in the water purification tank; the backup water supply device is used to provide backup water supply methods. The rainwater harvesting module includes a rainwater pump and a roof gutter. The sewage collection module includes a handwashing basin, a shower basin, and a sewage valve.

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