Microbial pollution treatment system and method based on medium-pressure ultraviolet and hydrogen peroxide

Abstract

According to the microbial pollution treatment system and method based on the medium-pressure ultraviolet and the hydrogen peroxide, an intelligent cooperative control strategy with the water inlet flow and the ultraviolet light transmittance as feedforward and the oxidation-reduction potential in front of a membrane as core feedback is constructed, the power of a medium-pressure ultraviolet lamp and the adding amount of the hydrogen peroxide are dynamically adjusted in a linkage mode, and the pollution treatment effect of the medium-pressure ultraviolet and the hydrogen peroxide is improved. The maximization of the advanced oxidation synergistic effect and the precise management and control of the membrane safety risk are realized, so that the technical effects of efficiently inhibiting microbial pollution, absolutely guaranteeing the safety of the reverse osmosis membrane, remarkably reducing the operation energy consumption and the medicine consumption and improving the water quality fluctuation resistance of the system are achieved.

Description

Technical Field

[0001] This invention relates to the field of industrial water treatment technology, and in particular to a microbial contamination treatment system and method based on medium-pressure ultraviolet light and hydrogen peroxide. Background Technology

[0002] Biofouling control in reverse osmosis systems is crucial for their stable operation. Medium-pressure ultraviolet lamps are widely used in large-scale water treatment projects due to their high power output and strong penetrating power. However, only certain bands in their broad spectrum are effective for sterilization, resulting in low energy efficiency. Furthermore, simple ultraviolet treatment lacks residual antibacterial capabilities.

[0003] Hydrogen peroxide is an environmentally friendly oxidant. When used in conjunction with ultraviolet light, it generates highly oxidizing hydroxyl radicals, achieving a synergistic bactericidal effect greater than the sum of its parts ("1+1>2"), and providing a continuous oxidizing environment. However, combining these two technologies in reverse osmosis systems faces two major challenges: (1) Lack of synergistic mechanism: UV dose and hydrogen peroxide dosage are usually controlled independently, making it difficult to optimize the synergistic effect based on varying water quality conditions.

[0004] (2) Safety risks: To ensure the continuity of antibacterial activity, it is necessary to control the residual amount of hydrogen peroxide, but excessive amounts will threaten the safety of the reverse osmosis membrane. Existing technologies lack real-time, closed-loop monitoring and linkage control of the oxidation potential of the membrane feed water, relying on manual monitoring, which has lag and risks.

[0005] Therefore, developing an intelligent system that can automatically optimize collaborative parameters and ensure absolute membrane safety is crucial for promoting the industrial application of this technology. Summary of the Invention

[0006] A first aspect of this disclosure provides a microbial contamination control system based on medium-pressure ultraviolet light and hydrogen peroxide, comprising: The following components are connected sequentially along the process flow: security filter 1, mixer 5, medium-pressure ultraviolet synergistic reaction unit 6, and reverse osmosis high-pressure pump 14. The hydrogen peroxide dosing unit includes a hydrogen peroxide storage tank 4 and a metering pump 3. The outlet of the metering pump 3 is connected to the mixer 5 and is used to add hydrogen peroxide to the water flowing through the mixer 5. The medium-pressure ultraviolet synergistic reaction unit 6 includes a medium-pressure ultraviolet lamp 7, a quartz sleeve 8 fitted over the medium-pressure ultraviolet lamp 7, an automatic cleaning device 9 for cleaning the outer surface of the quartz sleeve 8, an ultraviolet intensity sensor 11, and an ultraviolet transmittance sensor 10. The online monitoring unit includes an ultraviolet transmittance sensor 10 installed at the inlet or inside the medium-pressure ultraviolet synergistic reaction unit 6, an ultraviolet intensity sensor 11 installed inside the medium-pressure ultraviolet synergistic reaction unit 6, an online oxidation-reduction potential meter 13 installed between the medium-pressure ultraviolet synergistic reaction unit 6 and the reverse osmosis high-pressure pump 14, and a flow meter 2 installed on the process pipeline. The control system 15 is connected to the online monitoring unit, the lamp power regulator 12 of the medium-pressure ultraviolet synergistic reaction unit 6, and the metering pump 3 of the hydrogen peroxide dosing unit, respectively.

[0007] In conjunction with the first aspect, the control system 15 is configured to execute the following control logic: The theoretically required ultraviolet dose is calculated based on the real-time data of the flow meter 2 and the ultraviolet transmittance sensor 10, and the initial power of the medium-pressure ultraviolet lamp 7 is set via the lamp power regulator 12. The real-time data of the online redox potential table 13 is used as the core feedback signal and compared with the preset redox potential safety threshold range. If the real-time data is lower than the lower limit of the safety threshold range, the metering pump 3 is controlled to increase the amount of hydrogen peroxide added, and the lamp power regulator 12 is controlled to increase the power of the medium-pressure ultraviolet lamp 7. If the real-time data is higher than the upper limit of the safety threshold range, the metering pump 3 is controlled to reduce the amount of hydrogen peroxide added, and the lamp power regulator 12 is controlled to increase the power of the medium-pressure ultraviolet lamp 7.

[0008] In conjunction with the first aspect, the control system 15 is further configured to: calculate the actual ultraviolet dose based on the measured value of the ultraviolet intensity sensor 11, and adjust the lamp power regulator 12 using a closed-loop control method so that the actual ultraviolet dose approaches the theoretically required ultraviolet dose.

[0009] In conjunction with the first aspect, the control system 15 is also configured to: predict the synergistic sterilization efficiency based on the historical attenuation data of the ultraviolet intensity sensor 11 and the historical dosing data of the metering pump 3; and generate an early warning signal and trigger the automatic scrubbing device 9 to start when the predicted value is lower than a set critical value.

[0010] A second aspect of this disclosure provides a method for treating microbial contamination based on medium-pressure ultraviolet light and hydrogen peroxide, comprising the following steps: S1: Pre-treat the reverse osmosis feedwater by passing it through the security filter 1; S2: The control system 15 calculates and sets the initial power of the medium-pressure ultraviolet lamp 7 based on the real-time monitoring data of the flow meter 2 and the ultraviolet transmittance sensor 10. S3: Hydrogen peroxide is added to the water flowing through the mixer 5 via the metering pump 3; S4: The water after adding hydrogen peroxide enters the medium-pressure ultraviolet synergistic reaction unit 6, and is irradiated by the medium-pressure ultraviolet lamp 7 to carry out a high-level synergistic reaction of direct microbial inactivation and hydrogen peroxide-induced oxidation. S5: The oxidation-reduction potential of the effluent after step S4 is monitored in real time using the online oxidation-reduction potential meter 13. S6: Using the redox potential value monitored in step S5 as the control target, the control system 15 dynamically interlocks and adjusts the injection acceleration rate of the metering pump 3 and the output power of the medium-pressure ultraviolet lamp 7 to stabilize the redox potential value within the preset safety performance range.

[0011] In conjunction with the second aspect, in step S2, when the ultraviolet transmittance detected by the ultraviolet transmittance sensor 10 decreases, the control system 15 controls the lamp power regulator 12 to increase the power of the medium-pressure ultraviolet lamp 7 to compensate for the loss of effective ultraviolet dose caused by the decrease in transmittance.

[0012] In conjunction with the second aspect, the initial concentration of hydrogen peroxide added in step S3 is 0.5-2.0 mg / L.

[0013] In conjunction with the second aspect, the preset safety performance range in step S6 is set according to the antioxidant properties of the reverse osmosis membrane material, and the upper limit of the range corresponds to an oxidation-reduction potential that is not higher than +250mV.

[0014] A third aspect of this disclosure provides an electronic device comprising: One or more processors; A storage unit is used to store one or more programs, which, when executed by one or more processors, enable the one or more processors to implement the microbial contamination control method based on medium-pressure ultraviolet light and hydrogen peroxide.

[0015] A fourth aspect of this disclosure provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, enables the implementation of the microbial contamination control method based on medium-pressure ultraviolet light and hydrogen peroxide.

[0016] Beneficial effects: The microbial contamination control system and method based on medium-pressure ultraviolet light and hydrogen peroxide provided in this disclosure achieves the maximization of advanced oxidation synergy and precise control of membrane safety risks by constructing an intelligent collaborative control strategy with feedforward of influent flow rate and ultraviolet transmittance and core feedback of pre-membrane redox potential. This strategy dynamically adjusts the power of medium-pressure ultraviolet lamps and the dosage of hydrogen peroxide, thereby achieving the technical effects of efficiently inhibiting microbial contamination, absolutely ensuring the safety of reverse osmosis membranes, significantly reducing operating energy consumption and chemical consumption, and improving the system's resistance to water quality fluctuations. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a microbial contamination control system based on medium-pressure ultraviolet light and hydrogen peroxide according to an embodiment of this disclosure; Figure 2 This is a schematic flowchart of a microbial contamination treatment method based on medium-pressure ultraviolet light and hydrogen peroxide according to an embodiment of this disclosure; Figure 3 An electronic device according to an embodiment of this disclosure. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with those disclosed herein.

[0019] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0020] Figure 1 This is a schematic diagram of the structure of a microbial contamination control system based on medium-pressure ultraviolet light and hydrogen peroxide, according to an embodiment of this disclosure, including: The following components are connected sequentially along the process flow: security filter 1, mixer 5, medium-pressure ultraviolet synergistic reaction unit 6, and reverse osmosis high-pressure pump 14. The hydrogen peroxide dosing unit includes a hydrogen peroxide storage tank 4 and a metering pump 3. The outlet of the metering pump 3 is connected to the mixer 5 and is used to add hydrogen peroxide to the water flowing through the mixer 5. The medium-pressure ultraviolet synergistic reaction unit 6 includes a medium-pressure ultraviolet lamp 7, a quartz sleeve 8 fitted over the medium-pressure ultraviolet lamp 7, an automatic cleaning device 9 for cleaning the outer surface of the quartz sleeve 8, an ultraviolet intensity sensor 11, and an ultraviolet transmittance sensor 10. The online monitoring unit includes an ultraviolet transmittance sensor 10 installed at the inlet or inside the medium-pressure ultraviolet synergistic reaction unit 6, an ultraviolet intensity sensor 11 installed inside the medium-pressure ultraviolet synergistic reaction unit 6, an online oxidation-reduction potential meter 13 installed between the medium-pressure ultraviolet synergistic reaction unit 6 and the reverse osmosis high-pressure pump 14, and a flow meter 2 installed on the process pipeline. The control system 15 is connected to the online monitoring unit, the lamp power regulator 12 of the medium-pressure ultraviolet synergistic reaction unit 6, and the metering pump 3 of the hydrogen peroxide dosing unit, respectively.

[0021] Specifically, the system's main process begins with security filter 1, whose primary function is to remove suspended particulate matter from the reverse osmosis feed water, ensuring the reliability of the feed water quality for subsequent core treatment units and preventing impurities from interfering with ultraviolet transmittance or damaging precision components.

[0022] Following this is mixer 5, which serves as a crucial fluid mixing node. The connected hydrogen peroxide dosing unit (consisting of hydrogen peroxide storage tank 4 and metering pump 3) is responsible for precisely injecting the oxidant into the water flow. The controlled addition of hydrogen peroxide solution by metering pump 3 is thoroughly and rapidly mixed with the filtered water in mixer 5, preparing a homogeneous reaction matrix for subsequent synergistic reactions.

[0023] The core reaction occurs within the medium-pressure ultraviolet synergistic reaction unit 6. This unit integrates multiple functional components: a medium-pressure ultraviolet lamp 7 serves as the energy source, emitting broadband ultraviolet light; an outer quartz sleeve 8 isolates the lamp from the water flow, ensuring light transmission while facilitating maintenance; an automatic cleaning device 9 periodically and automatically cleans the outer wall of the sleeve to maintain stable ultraviolet light transmittance; a built-in ultraviolet intensity sensor 11 directly monitors the actual irradiance within the reaction chamber, while an ultraviolet transmittance sensor 10 assesses the ability of the incoming water to transmit ultraviolet light. This unit is the key location for achieving the synergistic effect of "direct ultraviolet sterilization" and "ultraviolet-induced hydrogen peroxide to generate hydroxyl radicals."

[0024] To ensure the precision and controllability of the entire process, the system is equipped with a comprehensive online monitoring unit. Flow meter 2 monitors the real-time treated water volume; UV transmittance sensor 10 and UV intensity sensor 11 together provide key parameters for calculating the actual received UV dose; most importantly, the online oxidation-reduction potential (ORP) table 13, located at the outlet of the reaction unit and before the reverse osmosis membrane element, directly and continuously monitors the oxidation level of the water before the membrane, and is the most direct indicator for assessing the persistence of sterilization and the risk of membrane oxidation.

[0025] All monitoring data and actuators ultimately converge at the control system 15. This system, acting as an intelligent hub, collects real-time data on flow rate, transmittance, light intensity, and ORP. Based on built-in optimization algorithms and safety logic, it simultaneously sends commands to the lamp power regulator 12 and the metering pump 3 to dynamically adjust the UV output power and hydrogen peroxide dosage. This closed-loop control achieves optimized synergistic sterilization under changing water quality conditions while strictly limiting the pre-membrane oxidation potential within a safe range, thus achieving a balance between high-efficiency treatment and absolute safety.

[0026] Furthermore, the control system 15 is configured to execute the following control logic: The theoretically required ultraviolet dose is calculated based on the real-time data of the flow meter 2 and the ultraviolet transmittance sensor 10, and the initial power of the medium-pressure ultraviolet lamp 7 is set via the lamp power regulator 12. The real-time data of the online redox potential table 13 is used as the core feedback signal and compared with the preset redox potential safety threshold range. If the real-time data is lower than the lower limit of the safety threshold range, the metering pump 3 is controlled to increase the amount of hydrogen peroxide added, and the lamp power regulator 12 is controlled to increase the power of the medium-pressure ultraviolet lamp 7. If the real-time data is higher than the upper limit of the safety threshold range, the metering pump 3 is controlled to reduce the amount of hydrogen peroxide added, and the lamp power regulator 12 is controlled to increase the power of the medium-pressure ultraviolet lamp 7.

[0027] Specifically, the system utilizes real-time flow data from flow meter 2 and influent transmittance measured by UV transmittance sensor 10 to calculate the theoretical UV dose required to achieve the target sterilization effect under current water quality conditions using a built-in algorithm. Based on this, the system feedforwardly sets the initial power of the medium-pressure UV lamp 7. This constitutes a rapid prediction mechanism for the system to respond to water quality fluctuations.

[0028] Subsequently, the system uses the pre-membrane oxidation-reduction potential (ORP) monitored by the online ORP meter 13 as the core feedback signal. This signal directly reflects the oxidizing power of the water (i.e., the residual amount and activity of hydrogen peroxide), and is a key indicator for measuring sustained antibacterial ability and membrane oxidation risk. The control system continuously compares this real-time ORP value with a preset safety threshold range.

[0029] When the ORP value is below the lower limit of the safe range, it indicates insufficient oxidation of the water body, and the continuous antibacterial ability may be weakened. The system will execute an "enhancement command": increase the amount of hydrogen peroxide added proportionally to increase the oxidant concentration, while finely adjusting and increasing the power of the ultraviolet lamp, with the aim of stimulating more hydroxyl radicals and quickly bringing the oxidation level back to the safe range.

[0030] When the ORP value exceeds the upper limit of the safe range, it indicates excessive oxidizing power, posing a risk of damaging the reverse osmosis membrane. The system will execute a "protection priority command": prioritizing the reduction of hydrogen peroxide dosage to directly lower the oxidant concentration and control the risk source; simultaneously, increasing the UV lamp power. The aim is to compensate for and maintain the overall synergistic sterilization intensity by enhancing the direct bactericidal effect of ultraviolet light and increasing the activation efficiency of residual hydrogen peroxide, while reducing the amount of reagents used, thereby achieving the dual goals of "reducing risk and maintaining effectiveness."

[0031] Furthermore, the control system 15 is also configured to: calculate the actual ultraviolet dose based on the measurement value of the ultraviolet intensity sensor 11, and adjust the lamp power regulator 12 in a closed-loop control manner so that the actual ultraviolet dose approaches the theoretically required ultraviolet dose.

[0032] Specifically, the control system employs a closed-loop control method (such as PID control), comparing the calculated actual UV dose with the theoretically required UV dose derived from the feedforward model in the first stage in real time. If a deviation exists, the system automatically adjusts the lamp power regulator 12, dynamically regulating the UV lamp output to ensure the actual dose continuously approaches and stabilizes near the theoretical set value. This ensures that regardless of changes in the lamp status, the effective UV energy applied to the water flow remains accurate and constant, laying the foundation for reliable disinfection.

[0033] Furthermore, the control system 15 is also configured to: predict the synergistic sterilization efficiency based on the historical attenuation data of the ultraviolet intensity sensor 11 and the historical dosing data of the metering pump 3; and generate an early warning signal and trigger the automatic scrubbing device 9 to start when the predicted value is lower than the set critical value.

[0034] Specifically, by analyzing the trends in these historical data, the system can build models to predict the synergistic sterilization efficiency under current operating parameters. For example, when the system detects that the intensity of the UV lamps is continuously decreasing due to aging, or that the amount of hydrogen peroxide needs to be continuously increased to maintain the ORP value, it can predict that the overall synergistic sterilization efficiency is declining and may fall below the set critical value.

[0035] Once the predicted value reaches the critical point, the system will not wait until efficiency has already decreased or membrane fouling has occurred before taking action. Instead, it will proactively generate an early warning signal (such as a prompt on the central control interface) and automatically trigger the automatic cleaning device 9 to clean the quartz sleeve to restore UV transmittance. This transforms "periodic cleaning" or "post-failure maintenance" into "on-demand predictive maintenance," significantly improving the stability and economy of system operation.

[0036] like Figure 2 The diagram shown is a schematic flow chart of a microbial contamination treatment method based on medium-pressure ultraviolet light and hydrogen peroxide according to an embodiment of this disclosure, including: S1: Pre-treat the reverse osmosis feedwater by passing it through the security filter 1; Specifically, the reverse osmosis feed water first passes through security filter 1, the main purpose of which is to effectively remove any suspended particles, colloids, and larger microorganisms that may be present in the water. This ensures that the water quality entering subsequent units meets basic requirements, especially preventing impurities from excessively affecting ultraviolet transmittance or causing contamination and wear to precision reaction components, thus creating conditions for precise photochemical treatment.

[0037] S2: The control system 15 calculates and sets the initial power of the medium-pressure ultraviolet lamp 7 based on the real-time monitoring data of the flow meter 2 and the ultraviolet transmittance sensor 10. Specifically, the control system 15 synchronously collects instantaneous flow data from the flow meter 2 and real-time monitoring data from the ultraviolet transmittance sensor 10. Using these parameters, the control system calculates the theoretical ultraviolet dose required to achieve the target microbial inactivation effect under the current influent water quality and flow rate through a built-in algorithm model, and based on this, sends a feedforward command to the lamp power regulator 12 to set the initial operating power of the medium-pressure ultraviolet lamp 7. This step enables the system to achieve a rapid initial response to the treatment load.

[0038] S3: Hydrogen peroxide is added to the water flowing through the mixer 5 via the metering pump 3; Specifically, the system uses a precise metering pump 3 to add hydrogen peroxide solution to the water flowing through the mixer 5 at a preset initial rate. The mixer 5 ensures that the reagent and water are mixed quickly and uniformly to form a hydrogen peroxide solution of uniform concentration, thus preparing sufficient reactants for subsequent ultraviolet excitation to generate hydroxyl radicals.

[0039] S4: The water after adding hydrogen peroxide enters the medium-pressure ultraviolet synergistic reaction unit 6, and is irradiated by the medium-pressure ultraviolet lamp 7 to carry out a high-level synergistic reaction of direct microbial inactivation and hydrogen peroxide-induced oxidation. Specifically, the water, after being mixed with the chemicals, enters the medium-pressure ultraviolet synergistic reaction unit 6 and is exposed to broadband ultraviolet radiation emitted by the medium-pressure ultraviolet lamps 7. Two key effects occur here: first, ultraviolet light (especially the UVC band) directly destroys the genetic material (DNA / RNA) of microorganisms, achieving direct photoinactivation; second, ultraviolet light (specific wavelengths) excites hydrogen peroxide in the water, causing it to decompose and produce highly oxidizing hydroxyl radicals (·OH), which then perform non-selective and highly efficient oxidative destruction of the microbial cell structure—a process known as advanced oxidation. Both occur simultaneously, resulting in a significant synergistic bactericidal effect.

[0040] S5: The oxidation-reduction potential of the effluent after step S4 is monitored in real time using the online oxidation-reduction potential meter 13. Specifically, the system continuously measures the ORP value of the effluent in real time using an online oxidation-reduction potential (ORP) meter (Table 13) located at the outlet of the reaction unit. This ORP value directly and sensitively reflects the overall intensity of oxidizing substances (mainly residual hydrogen peroxide and reactive free radicals) in the water, and is the most direct and critical indicator for assessing sustained antibacterial capability and potential membrane oxidation risk.

[0041] S6: Using the redox potential value monitored in step S5 as the control target, the control system 15 dynamically interlocks and adjusts the injection acceleration rate of the metering pump 3 and the output power of the medium-pressure ultraviolet lamp 7 to stabilize the redox potential value within the preset safety performance range.

[0042] Specifically, the control system 15 uses the real-time ORP value monitored in step S5 as the core process control target (PV) and continuously compares it with the preset safety performance range (SP). Based on this feedback signal, the system executes a dynamic interlocking adjustment strategy: when the ORP value is low, the system increases the dosage of the reagent proportionally and fine-tunes the UV power to enhance oxidizing properties; when the ORP value is high, it prioritizes reducing the dosage of the reagent to reduce the risk of oxidation, while simultaneously increasing the UV power to compensate for the sterilization effect. Through this linkage and real-time adjustment of the metering pump 3's dosing rate and the output power of the medium-pressure UV lamp 7, the ORP value is ensured to be accurately and stably controlled within the preset safety performance range, thereby achieving optimal sterilization effect while absolutely guaranteeing the long-term safe operation of the reverse osmosis membrane.

[0043] Furthermore, in step S2, when the ultraviolet transmittance detected by the ultraviolet transmittance sensor 10 decreases, the control system 15 controls the lamp power regulator 12 to increase the power of the medium-pressure ultraviolet lamp 7 to compensate for the loss of effective ultraviolet dose caused by the decrease in transmittance.

[0044] Specifically, when a decrease in the ultraviolet transmittance of the incoming water is detected (usually caused by factors such as increased concentrations of suspended solids and organic matter in the water), it means that the penetration ability of ultraviolet light in the water is weakened. Under the same irradiation power and contact time, the effective ultraviolet dose actually received by the water flow will decrease. To ensure that the sterilization effect is not affected by water quality fluctuations, the control system 15 will respond immediately and proportionally increase the output power of the medium-pressure ultraviolet lamp 7 through the lamp power regulator 12. The core purpose of this dynamic compensation mechanism is to offset the light intensity attenuation caused by the decrease in water transmittance by increasing the radiant flux of the light source, thereby maintaining a constant and effective target ultraviolet dose and ensuring the stable and reliable microbial inactivation effect.

[0045] Furthermore, the initial concentration of hydrogen peroxide added in step S3 is 0.5-2.0 mg / L.

[0046] Specifically, the lower concentration limit (0.5 mg / L) aims to ensure sufficient concentration of hydroxyl radicals generated by UV excitation, forming an effective basis for synergistic effects; the upper concentration limit (2.0 mg / L) is mainly based on dual considerations of operational economy and membrane safety. Excessively high initial dosage not only increases reagent costs but may also cause a rapid increase in the pre-membrane oxidation potential, approaching or even exceeding the safety threshold, increasing control difficulty and risk. This initial value serves as the basis for system startup or steady-state operation, and will subsequently be finely and dynamically adjusted by the intelligent control system based on real-time feedback of the ORP value, achieving precise dosing as needed.

[0047] Furthermore, the preset safety performance range in step S6 is set according to the antioxidant properties of the reverse osmosis membrane material, and the upper limit of the range corresponds to an oxidation-reduction potential that is not higher than +250mV.

[0048] Specifically, different manufacturers and types of reverse osmosis membrane elements have clearly defined tolerance limits for the oxidation of their feed water (usually characterized by ORP values) to prevent irreversible oxidative damage to the membrane polymer material caused by active oxidants (such as hydroxyl radicals and residual hydrogen peroxide), which could lead to membrane performance degradation or structural damage. Setting the upper limit of the safe range at +250mV or lower follows the conservative requirements of mainstream membrane product safety operation guidelines, establishing a clear "oxidative red line" for membrane equipment. The control system uses this as a target for closed-loop regulation, fundamentally eliminating the risk of membrane oxidative damage due to process runaway, and achieving safe coupling between advanced oxidation processes and sensitive membrane separation processes.

[0049] Electronic device 300 can be a desktop computer, laptop, handheld computer, cloud server, or other electronic device. Electronic device 300 may include, but is not limited to, processor 301 and memory 302. Those skilled in the art will understand that... Figure 3 This is merely an example of electronic device 300 and does not constitute a limitation on electronic device 300. It may include more or fewer components than shown, or combine certain components, or different components. For example, electronic device may also include input / output devices, network access devices, buses, etc.

[0050] Processor 301 can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor.

[0051] The memory 302 can be an internal storage unit of the electronic device 300, such as a hard disk or RAM of the electronic device 300. The memory 302 can also be an external storage device of the electronic device 300, such as a plug-in hard disk, Smart Media Card (SMC), Secure Digital (SD) card, or Flash Card equipped on the electronic device 300. Furthermore, the memory 302 can include both internal and external storage units of the electronic device 300. The memory 302 is used to store the computer program 303 and other programs and data required by the electronic device. The memory 302 can also be used to temporarily store data that has been output or will be output.

[0052] The above embodiments are only used to illustrate the technical solutions of this disclosure, and are not intended to limit it. Although this disclosure has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this disclosure, and should all be included within the protection scope of this disclosure.

Claims

1. A microbial contamination remediation system based on medium pressure ultraviolet and hydrogen peroxide, characterized in that, Comprise: a security filter (1), a mixer (5), a medium-pressure ultraviolet synergistic reaction unit (6) and a reverse osmosis high-pressure pump (14) connected in sequence along the process flow; a hydrogen peroxide dosing unit, comprising a hydrogen peroxide storage tank (4) and a metering pump (3), the outlet of the metering pump (3) being connected with the mixer (5) for adding hydrogen peroxide to the water flow passing through the mixer (5); wherein the medium-pressure ultraviolet synergistic reaction unit (6) is provided with a medium-pressure ultraviolet lamp (7), a quartz sleeve (8) sleeved outside the medium-pressure ultraviolet lamp (7), an automatic scrubbing device (9) for cleaning the outer surface of the quartz sleeve (8), an ultraviolet intensity sensor (w11) and an ultraviolet transmittance sensor (10); an online monitoring unit, comprising the ultraviolet transmittance sensor (10) arranged at the water inlet end or inside the medium-pressure ultraviolet synergistic reaction unit (6), the ultraviolet intensity sensor (11) arranged inside the medium-pressure ultraviolet synergistic reaction unit (6), the online oxidation-reduction potential meter (13) arranged between the medium-pressure ultraviolet synergistic reaction unit (6) and the reverse osmosis high-pressure pump (14), and the flow meter (2) arranged on the process pipeline; a control system (15) signal connected with the online monitoring unit, the lamp power regulator (12) of the medium-pressure ultraviolet synergistic reaction unit (6) and the metering pump (3) of the hydrogen peroxide dosing unit respectively.

2. The system of claim 1, wherein, The control system (15) is configured to perform the following control logic: Based on the real-time data of the flow meter (2) and the ultraviolet transmittance sensor (10), the theoretical required ultraviolet dose is calculated, and the initial power of the medium-pressure ultraviolet lamp (7) is set through the lamp power regulator (12); Take the real-time data of the online oxidation-reduction potential meter (13) as the core feedback signal, and compare it with the preset oxidation-reduction potential safety threshold interval; If the real-time data is lower than the lower limit of the safety threshold interval, increase the hydrogen peroxide dosage by controlling the metering pump (3), and increase the power of the medium-pressure ultraviolet lamp (7) by controlling the lamp power regulator (12); If the real-time data is higher than the upper limit of the safety threshold interval, preferentially control the metering pump (3) to reduce the hydrogen peroxide dosage, and at the same time control the lamp power regulator (12) to increase the power of the medium-pressure ultraviolet lamp (7).

3. The system of claim 2, wherein, The control system (15) is also configured to calculate the actual ultraviolet dose according to the measurement value of the ultraviolet intensity sensor (11), and adjust the lamp power regulator (12) in a closed loop control mode to make the actual ultraviolet dose approach the theoretical required ultraviolet dose.

4. The system of claim 1, wherein, The control system (15) is also configured to predict the synergistic sterilization efficiency according to the historical attenuation data of the ultraviolet intensity sensor (11) and the dosing history data of the metering pump (3), and generate a warning signal and trigger the automatic scrubbing device (9) to start when the predicted value is lower than the set critical value.

5. A method for microbial contamination remediation based on medium pressure UV and hydrogen peroxide using the system according to any one of claims 1 to 4, characterized in that, Comprise the following steps: S1: passing the reverse osmosis feed water through the security filter (1) for pretreatment; S2: calculating and setting the initial power of the medium-pressure ultraviolet lamp (7) based on the real-time monitoring data of the flow meter (2) and the ultraviolet transmittance sensor (10) through the control system (15); S3: adding hydrogen peroxide to the water flow flowing through the mixer (5) through the metering pump (3); S4: making the water flow after adding hydrogen peroxide enter the medium-pressure ultraviolet synergistic reaction unit (6) to receive irradiation of the medium-pressure ultraviolet lamp (7) and perform microbial direct inactivation and advanced oxidation synergistic reaction excited by hydrogen peroxide; S5: monitoring the oxidation-reduction potential of the effluent after step S4 in real time through the online oxidation-reduction potential meter (13); S6: taking the oxidation-reduction potential value monitored in step S5 as a control target, dynamically interlocking and adjusting the addition rate of the metering pump (3) and the output power of the medium-pressure ultraviolet lamp (7) through the control system (15) to make the oxidation-reduction potential value stable within a preset safe efficiency interval.

6. The method of claim 5, wherein, In step S2, when the ultraviolet transmittance monitored by the ultraviolet transmittance sensor (10) decreases, the control system (15) controls the lamp power regulator (12) to increase the power of the medium-pressure ultraviolet lamp (7) to compensate for the loss of effective ultraviolet dose caused by the decrease in transmittance.

7. The method of claim 5, wherein, The initial addition concentration of hydrogen peroxide in step S3 is 0.5-2.0 mg / L.

8. The method of claim 5, wherein, The preset safe efficiency interval in step S6 is set according to the oxidation resistance of the reverse osmosis membrane material, and the oxidation-reduction potential corresponding to the upper limit value is not higher than +250 mV.

9. An electronic device, comprising: Comprise: One or more processors; A storage unit for storing one or more programs that, when executed by the one or more processors, can cause the one or more processors to implement the method for treating microbial contamination based on medium-pressure ultraviolet and hydrogen peroxide according to any one of claims 5 to 8.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program can implement the method for treating microbial contamination based on medium-pressure ultraviolet and hydrogen peroxide according to any one of claims 5 to 8 when executed by a processor.

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