Reclaimed water recycling regulation and control system and method

Abstract

The invention discloses a reclaimed water recycling regulation and control system and method, and relates to the technical field of reclaimed water regulation and control, operation state analysis is performed on a plurality of bioreactors which are communicated with one another, all the bioreactors are classified into a set A, a set B and a set C according to analysis results, the bioreactors in the set A are closed, and the bioreactors in the set C are closed. And after the cycle index and the treated water amount of the bioreactor in the set B are intelligently regulated and controlled, the set B and the set C are combined to output a control instruction of the bioreactor, the reclaimed water in the regulating tank is lifted to the bioreactor through a lifting pump according to the control instruction to be treated, and the treated reclaimed water is conveyed to a clean water tank to be disinfected for standby application. The regulation and control system optimizes and manages the bioreactors in different states, adjusts the cycle index and water distribution of the reactors supported to be used, ensures the load balance of the whole system, improves the water treatment efficiency, and avoids unnecessary resource waste.

Description

Technical Field

[0001] The present invention relates to the technical field of reclaimed water regulation, and particularly relates to a reclaimed water recycling and regulation system and method. Background Art

[0002] Water is an essential basic resource in campus life and daily activities. With the improvement of environmental protection awareness and the exacerbation of water resource shortage problems, it has become increasingly important to rationally utilize and manage water resources. To improve the utilization efficiency of water resources, save water, and reduce reclaimed water discharge, more and more campuses have started to implement water recycling and reuse systems.

[0003] The existing technologies have the following defects:

[0004] Traditional reclaimed water treatment systems usually do not have a refined monitoring and management mechanism for the state of bioreactors. The bioreactors may have reduced treatment efficiency due to unbalanced operation. For example, if some reactors are overloaded while others have too low a load, it will lead to a decline in the performance of some reactors, ultimately affecting the overall treatment effect of reclaimed water.

[0005] Based on this, the present invention proposes a reclaimed water recycling and regulation system and method to optimize the management of bioreactors in different states, adjust the circulation times and water volume distribution of the reactors that support use, ensure the load balance of the entire system, improve the water treatment efficiency, and avoid unnecessary resource waste. Summary of the Invention

[0006] The purpose of the present invention is to provide a reclaimed water recycling and regulation system and method to solve the deficiencies in the background art.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A reclaimed water recycling and regulation method, the regulation method includes the following steps:

[0008] The water collection equipment collects reclaimed water and performs pre-filtration. The reclaimed water after pre-filtration enters the regulation tank for water volume and water quality regulation;

[0009] Analyze the operating states of multiple interconnected bioreactors, and divide all bioreactors into set A, set B, and set C respectively according to the analysis results, and close the bioreactors in set A;

[0010] After intelligently regulating the circulation times and treated water volumes of the bioreactors in set B, combine set B and set C to output control instructions for the bioreactors. According to the control instructions, lift the reclaimed water in the regulation tank to the bioreactors for treatment through a lift pump, and the treated reclaimed water is transported to the clear water tank for disinfection and then reserved for use.

[0011] In a preferred embodiment, the operating states of multiple interconnected bioreactors are analyzed, including the following steps:

[0012] Obtain the water distribution flow deviation, membrane flux accumulation factor, and the amplitude of the air flow fluctuation of the aeration device of the bioreactor;

[0013] Comprehensively calculate the water distribution flow deviation, membrane flux accumulation factor, and the amplitude of the air flow fluctuation of the aeration device to obtain the abnormality index of the bioreactor. The expression is:

[0014] In the formula, is the abnormality index, Jer is the membrane flux accumulation factor, F_Dev is the water distribution flow deviation, S_Dev is the amplitude of the air flow fluctuation of the aeration device, and α, β, and γ are adjustment coefficients, and α, β, and γ are all greater than 0.

[0015] In a preferred embodiment, all bioreactors are classified into set A, set B, and set C according to the analysis results, including the following steps:

[0016] Compare the obtained abnormality index with a preset first index threshold and a second index threshold. The first index threshold is used to determine whether there is an abnormality in the operation of the bioreactor, and the second index threshold is used to determine the severity of the abnormality of the bioreactor, and the first index threshold is less than the second index threshold;

[0017] If the abnormality index is less than or equal to the first index threshold, it is determined that there is no abnormality in the operation of the bioreactor, and the bioreactor is classified into set C;

[0018] If the abnormality index is less than or equal to the second index threshold and greater than the first index threshold, it is determined that there is a slight abnormality in the operation of the bioreactor, and the bioreactor is classified into set B;

[0019] If the abnormality index is greater than the second index threshold, it is determined that there is a serious abnormality in the operation of the bioreactor, and the bioreactor is classified into set A.

[0020] In a preferred embodiment, the number of cycles and the water treatment volume of the bioreactors in set B are intelligently regulated, including the following steps:

[0021] Regulate the water treatment volume of the bioreactors in set B through the abnormality index. The expression of the regulation algorithm is: In the formula, sl nwe is the regulated water treatment volume, sl old is the water treatment volume before regulation, is the abnormality index;

[0022] Generate the number of cycles of the bioreactor according to the regulated water treatment volume. The expression is:

[0023] Wherein, C r is the current required number of cycles, C0 is the initial number of cycles, sl new is the treated water volume after regulation, sl old is the treated water volume before regulation, is the ceiling function symbol.

[0024] In a preferred embodiment, the control instructions for the bioreactor are output by combining Set B and Set C, including the following steps:

[0025] Obtain the number of bioreactors in Set C and Set B. Give priority to using the bioreactors in Set C. If the operation of the bioreactors in Set C meets the reclaimed water treatment efficiency of the regulation system, then do not start the bioreactors in Set B. If the operation of the bioreactors in Set C does not meet the reclaimed water treatment efficiency of the regulation system, then for each bioreactor in Set B, allocate the workload based on the treated water volume after regulation and the number of cycles.

[0026] In a preferred embodiment, the regulation system obtains the acceptance value by subtracting the current predicted reclaimed water treatment efficiency from the expected reclaimed water treatment efficiency. If the acceptance value is less than or equal to the acceptance threshold, it indicates that the decline in the reclaimed water treatment efficiency is still within the acceptable range. If the acceptance value is greater than the acceptance threshold, it indicates that the decline in the reclaimed water treatment efficiency is not within the acceptable range, and the regulation system sends a warning signal to relevant management personnel for prompt.

[0027] In a preferred embodiment, the calculation expression of the water distribution flow deviation is: Wherein, F_Dev is the water distribution flow deviation, Q total is the total water flow of the water distribution device, Q i is the water flow of the i-th water distribution port, and n is the number of water distribution ports;

[0028] The calculation expression of the membrane flux accumulation factor is: Wherein, is the membrane flux accumulation factor, 0 to t is the monitoring time period, C p (τ) is the membrane flux at time τ;

[0029] The calculation logic of the gas flow fluctuation amplitude of the aeration device is: within the monitoring time period, obtain the gas flows of the aeration device at multiple time points, and calculate the gas flow fluctuation amplitude of the aeration device based on the gas flows at multiple time points. The expression is: Wherein, S_Dev is the gas flow fluctuation amplitude of the aeration device, m is the number of time points, L i is the gas flow of the aeration device at the i-th time point, L total is the total gas flow of the aeration device within the monitoring time period.

[0030] In a preferred embodiment, the bioreactor is a DMBR dual-membrane internal circulation bioreactor, which includes a biofilm reaction zone and a microfiltration membrane filtration zone. The reclaimed water mixture forms an internal circulation in the biofilm reaction zone and the microfiltration membrane filtration zone under the action of the aeration airflow. The biofilm reaction zone is provided with a water distribution device, biofilm fillers, an aeration device and an intake electric valve, and the microfiltration membrane filtration zone is provided with an immersed microfiltration membrane module, an aeration flushing device and an intake electric valve.

[0031] In a preferred embodiment, the working process of the DMBR dual-membrane internal circulation bioreactor is as follows:

[0032] The reclaimed water mixture enters the biofilm reaction zone evenly through the water distribution device. The intake electric valve of the packed biofilm reaction zone is opened intermittently to alternately form an anaerobic-anoxic-aerobic environment, and complete the aerobic nitrification and phosphorus absorption of microorganisms, anoxic denitrification reaction, and anaerobic phosphorus release reaction.

[0033] The reacted reclaimed water mixture forms an internal circulation under the action of the airflow, flows through the microfiltration membrane filtration zone, and the detached biofilm and particulate matter are intercepted by the microfiltration membrane and returned to the biofilm reaction zone with the water flow, and the clear water passes through the microfiltration membrane module and flows into the clear water tank.

[0034] A reclaimed water recycling and regulation system includes a pre-filtration unit, a reclaimed water regulation unit, a reactor set division unit, and an intelligent regulation unit;

[0035] Pre-filtration unit: used to collect reclaimed water and perform pre-filtration;

[0036] Reclaimed water regulation unit: used to regulate the water volume and water quality of reclaimed water;

[0037] Reactor set division unit: analyze the operating status of multiple interconnected bioreactors, and divide all bioreactors into set A, set B, and set C respectively according to the analysis results;

[0038] Intelligent regulation unit: close the bioreactors in set A, and after intelligently regulating the circulation times and treatment water volumes of the bioreactors in set B, combine set B and set C to output control instructions for the bioreactors, and lift the reclaimed water in the regulation tank to the bioreactors for treatment through a lift pump according to the control instructions. The treated reclaimed water is disinfected and reserved for use.

[0039] In the above technical solution, the technical effects and advantages provided by the present invention are:

[0040] The present invention analyzes the operating states of multiple interconnected bioreactors, divides all the bioreactors into set A, set B, and set C respectively according to the analysis results, shuts down the bioreactors in set A, and after intelligently regulating the circulation times and treated water volumes of the bioreactors in set B, combines set B and set C to output control instructions for the bioreactors. According to the control instructions, the reclaimed water in the regulating tank is lifted to the bioreactor for treatment by a lift pump, and the treated reclaimed water is transported to the clear water tank for disinfection and then standby. The regulation system optimally manages bioreactors in different states, adjusts the circulation times and water volume distribution of the reactors that support use, ensures the load balance of the entire system, improves the water treatment efficiency, and avoids unnecessary resource waste. Brief Description of the Drawings

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0042] Figure 1 It is a flowchart of the method of the present invention.

[0043] Figure 2 It is a working flowchart of the bioreactor in the present invention. Detailed Embodiments

[0044] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] Embodiment 1: Please refer to Figure 1 As shown, a regulation method for reclaimed water recycling in this embodiment includes the following steps:

[0046] The water collection equipment collects reclaimed water and conducts pre-filtration. The water sources for reclaimed water treatment include swimming pool drainage, rainwater, and reclaimed water from new buildings. The water collection equipment filters large particulate impurities (such as leaves, plastics, etc.) in the reclaimed water through two-stage basket grilles to prevent subsequent equipment from being blocked. The pre-filtered reclaimed water enters the regulation tank for water volume and water quality regulation, making the water quality and water volume in the subsequent treatment process relatively stable and ensuring the consistency of treatment effects. Analyze the operating states of multiple interconnected bioreactors, and according to the analysis results, divide all bioreactors into set A, set B, and set C respectively. Shut down the bioreactors in set A, and after intelligently regulating the circulation times and treatment water volumes of the bioreactors in set B, combine set B and set C to output control instructions for the bioreactors. According to the control instructions, lift the reclaimed water in the regulation tank to the bioreactors for treatment through a lift pump. The treated reclaimed water is transported to the clear water tank for disinfection and then reserved for use. Ultraviolet light, ozone, or sodium hypochlorite is used for disinfection to kill pathogenic microorganisms in the water and ensure water quality safety. The reserved water is used for campus greening irrigation, toilet flushing, road cleaning, etc., and the remaining part can be safely discharged into natural water bodies.

[0047] In this application, by analyzing the operating states of multiple interconnected bioreactors, all bioreactors are divided into set A, set B, and set C respectively according to the analysis results. Shut down the bioreactors in set A, and after intelligently regulating the circulation times and treatment water volumes of the bioreactors in set B, combine set B and set C to output control instructions for the bioreactors. According to the control instructions, lift the reclaimed water in the regulation tank to the bioreactors for treatment through a lift pump. The treated reclaimed water is transported to the clear water tank for disinfection and then reserved for use. The regulation system optimally manages bioreactors in different states, adjusts the circulation times and water volume distribution of the reactors that support use, ensures the load balance of the entire system, improves water treatment efficiency, and avoids unnecessary resource waste.

[0048] Example 2: The water collection equipment collects reclaimed water and conducts pre-filtration. The water sources for reclaimed water treatment include swimming pool drainage, rainwater, and reclaimed water from new buildings. The water collection equipment filters large particulate impurities (such as leaves, plastics, etc.) in the reclaimed water through two-stage basket grilles to prevent subsequent equipment from being blocked, and includes the following steps:

[0049] The water collection equipment is responsible for collecting reclaimed water from multiple sources, mainly including the following categories:

[0050] Swimming pool drainage: Water from the campus swimming pool, containing certain chlorides, chemical substances, and impurities.

[0051] Rainwater: Precipitation collected from the campus roof, roads, and other hardened surfaces. Rainwater contains solid particles such as dust and sediment.

[0052] Reclaimed water from new buildings: Reclaimed water from new buildings on campus may include domestic wastewater, shower water, etc., containing low concentrations of organic matter and suspended solids.

[0053] Reclaimed water from these different sources converges into a unified sump through a dedicated pipeline system. The main function of the sump is to temporarily store the water to be treated and provide a stable water source for subsequent treatment processes. Through sedimentation in the sump, larger particulate matter (such as sand, impurities, etc.) will settle naturally, playing a role in preliminary water quality regulation.

[0054] The water flow in the sump will first pass through a primary basket strainer. This process is mainly used to capture larger particulate impurities in the water, such as: organic debris from rainwater or swimming pool drainage. Domestic waste from the campus environment. Sediments that may be mixed into rainwater or reclaimed water from new buildings. The mesh of the primary basket strainer is relatively large, usually designed with an aperture of 5 - 10 mm to effectively prevent larger impurities from entering the next-stage treatment equipment. When the water flow passes through the strainer, larger impurities are physically intercepted and removed regularly through mechanical cleaning methods.

[0055] After the water flow passes through the primary strainer, it enters the secondary basket strainer. This stage mainly removes smaller solid particles in the water, such as: further removing fine organic matter in the water through the secondary strainer. These fine non-biological impurities may pass through the screening of the primary strainer but still remain in the water flow, and the secondary strainer can further remove them. The aperture of the secondary basket strainer is finer than that of the primary strainer, usually designed with an aperture of 1 - 5 mm to ensure further removal of small-sized impurities. The interception effect of the secondary strainer can effectively prevent fine particles from entering the subsequent treatment system.

[0056] The coarse particulate matter passing through the primary strainer has been removed, making the water flow relatively clean and reducing the burden on subsequent equipment. The secondary strainer further removes small particulate impurities meticulously, ensuring that the water quality will not affect the operation of subsequent equipment due to smaller impurities, and avoiding equipment blockage, damage, and increased maintenance frequency.

[0057] To ensure the filtering effect of the primary and secondary strainers, it is necessary to regularly clean the impurities accumulated on the strainers, avoid strainer blockage, hinder the water flow, and ensure the long-term stable operation of the strainers. Install sensors in the strainer system to monitor the water flow rate and strainer blockage situation in real time, and automatically clean or maintain as needed.

[0058] Through two - stage grid filtration, the vast majority of larger particulate impurities in the water flow have been removed, and the water quality has been significantly improved. At this time, the water flow enters the subsequent treatment stage, and the solid particle content in the water has dropped to a relatively low level, laying a foundation for subsequent biological treatment, disinfection and other steps. Through meticulous pre - filtration steps, the subsequent equipment in the water treatment system (such as biological reactors, pump systems, pipelines, etc.) will no longer be affected by excessive impurities, thereby reducing equipment failure rates and maintenance costs.

[0059] Through the refined design of the water source access, collection pool storage, and two - stage grid filtration process, this application can effectively remove large particulate impurities in the water, ensure the normal operation of subsequent equipment, and prevent impurities in the water source from causing equipment failures or performance degradation. At the same time, during the pre - filtration process, a refined water quality monitoring and real - time feedback mechanism is adopted to ensure the stability of system operation and the controllability of water quality, providing a high - quality intermediate water source for subsequent biological reactor treatment and disinfection.

[0060] The intermediate water after pre - filtration enters the regulation tank for water volume and water quality regulation, making the water quality and water volume relatively stable during the subsequent treatment process and ensuring the consistency of treatment effects, including the following steps:

[0061] The intermediate water after two - stage grid filtration is guided into the regulation tank. At this time, the water source has removed large particulate impurities and the water quality is relatively clean, but further regulation is still required to ensure the stability of subsequent treatment. The main function of the regulation tank is to provide a uniform and stable water source for subsequent treatment, avoiding excessive water quality fluctuations and uneven water volume from affecting treatment effects.

[0062] As a water volume buffer, the regulation tank can balance the water volume fluctuations from different water sources (such as swimming pool drainage, rainwater, wastewater from new buildings, etc.) flowing into the system. When the inflow volume of a certain water source is large, the regulation tank can temporarily store part of the water volume, relieve the situation of sudden water volume increase in a short time, and prevent the over - load operation of pumps and treatment equipment. If the water level in the regulation tank is too high, the excess water will be automatically discharged to prevent excessive water volume from causing pressure on subsequent equipment; if the water level is too low, the system will adjust the water flow through valves to ensure that the water volume in the regulation tank is maintained within a reasonable range.

[0063] Natural sedimentation occurs inside the equalization basin. Small particulate matter, suspended solids, etc. in the water gradually settle in the basin, further improving the water quality. By adjusting the hydraulic retention time of the equalization basin (usually several hours), the fine particles in the water can settle to the bottom of the basin, reducing the possibility of their entry into the subsequent bioreactor. When necessary, appropriate conditioning agents, such as flocculants or coagulants, may be added to the equalization basin to help further remove fine particles or colloidal substances in the water and improve the water quality. The dosage of the agent will be automatically adjusted according to the water quality monitoring results to avoid overdosage or underdosage. The equalization basin can also ensure the appropriate pH value of the water quality by adding pH regulators. Excessive acidity or alkalinity of the water quality will affect the subsequent bioreactor and disinfection process. Therefore, it is necessary to ensure that the pH value of the water is within the appropriate range.

[0064] In some areas with strong seasonality, temperature changes will affect the activity of microorganisms in the water, and thus affect the treatment efficiency of the subsequent bioreactor. The water temperature in the equalization basin can be appropriately adjusted through some devices (such as water temperature regulators or heating systems) to ensure that the water temperature is within the most suitable range. The temperature sensor in the system will monitor the water temperature in real time and automatically adjust it through heaters or cooling equipment to ensure that the water temperature is appropriate when the water flow enters the bioreactor.

[0065] The equalization basin is equipped with a variety of sensors to monitor water quality parameters in real time, such as turbidity, dissolved oxygen, pH value, temperature, suspended solid concentration, etc. These data will be fed back to the central control system, and the control system will automatically adjust the treatment process according to the water quality changes to ensure the stability of the water quality. The system identifies the water quality fluctuation trend through data analysis and automatically adjusts links such as chemical dosing, discharge water volume, and water flow control to ensure that the water quality in the equalization basin always meets the requirements for entering the bioreactor.

[0066] The process of adjusting the water volume and water quality of the equalization basin is completely automatically executed by the intelligent control system. Through advanced algorithms, the system can predict subsequent demands based on real-time water volume, water quality parameters, and historical data, and automatically adjust the water flow rate and water quality adjustment measures in the equalization basin. The operating status of the equalization basin can be viewed in real time through the remote monitoring system. Operators can adjust the operating settings of the equalization basin as needed or intervene in a timely manner according to the abnormal alarm.

[0067] The water treated by the equalization basin will have relatively stable water volume and water quality, ensuring that when entering the subsequent bioreactor, the water quality and water volume are consistent. This stability is the basis for ensuring the normal operation of the bioreactor and the consistency of the treatment effect. Under the condition of stable water volume and water quality, the equalization basin can effectively distribute the water flow into each bioreactor, avoiding overloading of a certain reactor or a decrease in treatment efficiency, thereby improving the overall treatment efficiency.

[0068] Performing an operating status analysis on multiple interconnected bioreactors includes the following steps:

[0069] Obtain the water distribution flow deviation, membrane flux accumulation factor, and the amplitude of air flow fluctuation of the aeration device of the bioreactor;

[0070] Comprehensively calculate the water distribution flow deviation, membrane flux accumulation factor, and the amplitude of air flow fluctuation of the aeration device to obtain the abnormal index of the bioreactor. The expression is:

[0071] In the formula, is the abnormal index, Jer is the membrane flux accumulation factor, F_Dev is the water distribution flow deviation, S_Dev is the amplitude of air flow fluctuation of the aeration device, α, β, γ are adjustment coefficients, and α, β, γ are all greater than 0. The abnormal index comprehensively considers the water distribution flow deviation, membrane flux accumulation factor, and the amplitude of air flow fluctuation of the aeration device. The larger the abnormal index, the worse the overall performance of the bioreactor.

[0072] The calculation expression of the water distribution flow deviation is: In the formula, F_Dev is the water distribution flow deviation, Q total is the total water flow of the water distribution device, Q i is the water flow of the i-th water distribution port, and n is the number of water distribution ports. When the water distribution flow deviation is large, it means that the distribution of the water distribution device is uneven, resulting in the inability to evenly distribute the water flow in the reactor, affecting the contact efficiency of microorganisms and the removal efficiency of pollutants.

[0073] The calculation expression of the membrane flux accumulation factor is: In the formula, is the membrane flux accumulation factor, 0~t is the monitoring time period, C p (τ) is the membrane flux at time τ;

[0074] The decrease in membrane flux is usually proportional to the degree of membrane fouling. When the membrane surface is contaminated by solid particles, bacteria, or organic substances, the pores of the membrane are blocked, and the water passage ability is reduced. Therefore, the decrease in membrane flux is usually a sign of severe membrane fouling. Membrane fouling not only reduces the filtration ability but also increases the energy consumption of the system, resulting in a decrease in the treated water volume. The bioreactor filters solid particles and impurities in water through membrane filtration. A decrease in membrane flux means that the amount of water passing through the membrane per unit time decreases, and the treatment efficiency decreases. When the membrane flux is too low, the total treatment capacity of the reactor is also limited, and the treated water volume and water quality are affected. Therefore, the decrease in membrane flux will directly lead to a decline in the overall performance of the bioreactor;

[0075] As the membrane flux decreases, the system requires higher pressure to drive water through the membrane, thereby increasing energy consumption. To maintain the same treatment capacity, the system requires a larger pressure difference, which not only increases energy consumption but also leads to wear and failures of the equipment. Therefore, the reduction of membrane flux will result in an increase in the operation cost and energy consumption of the bioreactor, further reducing the overall performance. The decrease in membrane flux means a deterioration in the filtration effect, and fine particles, suspended solids, and pollutants in the water may not be effectively removed. This will lead to water quality deterioration, and the subsequent treatment processes of the reactor cannot ensure the safety and stability of water quality. The reduction of membrane flux may also lead to a decrease in the system stability. Due to membrane fouling, the reactor requires more cleaning cycles to maintain the service life of the membrane. Frequent cleaning will result in intermittency and instability of the system operation, affecting the continuity and stability of water treatment;

[0076] The smaller the membrane flux, the more serious the membrane fouling, the lower the filtration efficiency, the lower the water treatment capacity, the higher the energy consumption, the worse the water quality control, and the lower the system stability. Therefore, the reduction of membrane flux is an important indicator of the decline in the overall performance of the reactor. This phenomenon reflects membrane fouling, blockage, and increased operation burden, all of which will cause the bioreactor to fail to work efficiently and stably.

[0077] The calculation logic of the fluctuation amplitude of the air flow rate of the aeration device is as follows: within the monitoring time period, the air flow rates of the aeration device at multiple time points are obtained, and the fluctuation amplitude of the air flow rate of the aeration device is calculated based on the air flow rates at multiple time points. The expression is: In the formula, S_Dev is the fluctuation amplitude of the air flow rate of the aeration device, m is the number of time points, L i is the air flow rate of the aeration device at the i-th time point, L total is the total air flow rate of the aeration device within the monitoring time period;

[0078] The air flow rate of the aeration device plays a crucial role in the cleaning process of the microfiltration membrane. Either too large or too small air flow rate may result in incomplete cleaning of the membrane surface, and the accumulated pollutants cannot be effectively removed. The larger the fluctuation amplitude of the air flow rate, the greater the instability of the membrane surface cleaning. In this way, at some moments, the air flow is insufficient, leading to aggravated membrane fouling; while at other moments, the air flow is too large, which may cause over-flushing, resulting in membrane damage or unevenness in the flushing process. The larger the fluctuation amplitude of the air flow rate, the worse the stability of the cleaning effect, the aggravated membrane fouling, leading to a decrease in membrane flux, thus affecting the performance of the reactor.

[0079] The aeration device in the bioreactor is not only used to clean the membrane but also responsible for providing oxygen to the microorganisms in the reactor, especially during the aerobic reaction stage. The instability of oxygen supply (i.e., excessive air flow fluctuations) can lead to unstable metabolic activities of the microorganisms in the reactor. When the oxygen supply is insufficient, the activity of the microorganisms decreases, resulting in poor treatment effects; while when the air flow is too large, although the oxygen supply may increase, it may also cause energy waste. The greater the amplitude of the air flow fluctuation, the more unstable the oxygen supply and the microbial activity, leading to a decrease in the treatment efficiency of the bioreactor and affecting the performance of the reactor. The air flow fluctuation of the aeration device not only affects the treatment effect of the bioreactor but also increases the energy consumption. To maintain a stable treatment effect, the reactor may need to continuously adjust the air flow and frequently regulate the power of the aeration device, resulting in unnecessary energy consumption. The greater the air flow fluctuation, the higher the adjustment frequency and the greater the energy consumption. The greater the amplitude of the air flow fluctuation, the more frequent the air flow adjustment, leading to an increase in energy consumption and possibly increasing the wear of the system, affecting the long-term stable operation of the equipment.

[0080] The fluctuation of the air flow also affects the operation stability of the entire bioreactor. A relatively large air flow fluctuation may cause the operation load of the reactor to be unbalanced, resulting in the reactor being overloaded during some periods and having insufficient air flow supply during other periods. Such instability not only affects the treated water volume but also may cause the reactor to be unable to efficiently handle the fluctuating influent water quality. The greater the amplitude of the air flow fluctuation, the more unstable the operation load of the reactor and the poorer the stability of the treatment process, leading to a decline in the performance of the bioreactor. The air flow fluctuation may also cause instability in the water quality of the reactor. When the oxygen supply is insufficient, the metabolic ability of the microorganisms decreases, resulting in incomplete degradation of organic matter and poor water quality; while too large an air flow may cause excessive aeration in the system, which may also affect the dissolved oxygen level in the water, thus affecting the water quality. The greater the amplitude of the air flow fluctuation, the greater the instability of the water quality treatment effect, leading to a decline in the water quality control ability and further affecting the overall performance of the bioreactor.

[0081] According to the analysis results, all bioreactors are respectively classified into set A, set B, and set C, including the following steps:

[0082] The abnormal index comprehensively considers the deviation of the water distribution flow rate, the membrane flux accumulation factor, and the amplitude of the air flow fluctuation of the aeration device. The greater the abnormal index, the worse the overall performance of the bioreactor;

[0083] Compare the obtained abnormal index with a preset first index threshold and a second index threshold. The first index threshold is used to judge whether there is an abnormality in the operation of the bioreactor, and the second index threshold is used to judge the severity of the abnormality of the bioreactor, and the first index threshold is less than the second index threshold;

[0084] If the anomaly index is less than or equal to the first index threshold, it is determined that the bioreactor is operating normally, and this bioreactor is classified into set C;

[0085] If the anomaly index is less than or equal to the second index threshold and greater than the first index threshold, it is determined that the bioreactor is operating with a slight anomaly, and this bioreactor is classified into set B;

[0086] If the anomaly index is greater than the second index threshold, it is determined that the bioreactor is operating with a serious anomaly, and this bioreactor is classified into set A. The bioreactors in set A do not support operation and need to be shut down.

[0087] Intelligently regulate the number of cycles and the water treatment volume of the bioreactors in set B, including the following steps:

[0088] In set B, the overall performance of the bioreactor slightly decreases, but it still supports use;

[0089] Therefore, in order to ensure the stability of the operation of the bioreactors in set B, it is necessary to reduce the single - water treatment volume of the bioreactors in set B and increase the number of cycles of the bioreactors;

[0090] In this application, the water treatment volume of the bioreactors in set B is regulated by the anomaly index, and the regulation algorithm expression is: In the formula, sl new is the regulated water treatment volume, sl old is the water treatment volume before regulation, is the anomaly index;

[0091] Generate the number of cycles of the bioreactor according to the regulated water treatment volume, and the expression is:

[0092] In the formula, C r is the currently required number of cycles, C0 is the initial number of cycles, sl new is the regulated water treatment volume, sl old is the water treatment volume before regulation, is the ceiling symbol, and the operation is called Ceiling representation, which represents the smallest integer greater than or equal to itself. For example, 1.2 is rounded up to 2, and so on.

[0093] Combine set B and set C to output the control instructions for the bioreactor, including the following steps:

[0094] Obtain the number of bioreactors in set C and set B. First, use the bioreactors in set C. If the operation of the bioreactors in set C meets the reclaimed water treatment efficiency of the control system, then do not start the bioreactors in set B. If the operation of the bioreactors in set C does not meet the reclaimed water treatment efficiency of the control system, then for each bioreactor in set B, allocate the workload based on the regulated water treatment volume and the number of cycles until the reclaimed water treatment efficiency of the control system is met;

[0095] In practical applications, it may occur that the simultaneous operation of all bioreactors in set C and set B cannot meet the requirements of the reclaimed water treatment efficiency of the control system (usually due to insufficient numbers of bioreactors in set C and set B). We obtain the acceptance value by subtracting the current estimated reclaimed water treatment efficiency from the expected reclaimed water treatment efficiency. If the acceptance value is less than or equal to the acceptance threshold, it indicates that the decline in reclaimed water treatment efficiency is still within the acceptable range. If the acceptance value is greater than the acceptance threshold, it indicates that the decline in reclaimed water treatment efficiency is not within the acceptable range, and the control system sends a warning signal to relevant management personnel for notification.

[0096] Assume that when the number of bioreactors in set C is insufficient to meet the reclaimed water treatment demand of the system, the processing capacity needs to be supplemented by the reactors with degraded performance in set B. At this time, we need to re-design the combination plan of the bioreactors so that the system can maximize the performance of each reactor while ensuring water quality safety.

[0097] There are k bioreactors. There are a bioreactors in set A (already closed), b bioreactors in set B (with degraded performance, water volume needs to be adjusted and the number of cycles needs to be increased), and k - b - a bioreactors in set C (with the best performance, but the number is insufficient to meet the demand alone).

[0098] Assume that the reclaimed water volume to be processed is F_total (assumed to be 20m 3 / h). Set C can only provide a processing capacity of F_C, and the remaining part needs to be supplemented by the bioreactors in set B.

[0099] The number of reactors in set C is insufficient, but it can still provide a certain processing capacity. Assume that there are 2 reactors in set C, and the maximum processing capacity of each reactor is 10m 3 / h, F_C = 10m 3 / h * 2 = 20m 3 / h (at this time, set C has provided all the processing capacity required by the system). However, in practical applications, the number of reactors in set C often fails to meet the demand or needs further adjustment.

[0100] Assume that set C can only provide 15m 3 / h (e.g., there is only 1 reactor in set C), at this time, it is necessary to rely on set B to supplement the remaining processing capacity. Suppose there are 3 reactors in set B, and the processing capacity of each reactor is 8m 3 / h under normal conditions, but due to performance degradation, adjustment is required to reduce the water volume and increase the number of cycles.

[0101] Option 1: Fully enable some reactors in set B

[0102] Set C: Provide 15m 3 / h processing capacity. Set B: The remaining water volume to be processed is 5m 3 / h. Select one or more reactors for adjustment to supplement. Suppose the original water treatment volume of reactor B1 (reactor 1 in set B) is 8m 3 / h, and after performance degradation, the water volume is adjusted to 4m 3 / h, and the number of cycles is increased to compensate for the performance loss. Suppose that after adjustment, B1 can reach 5m 3 / h processing capacity.

[0103] Example 1: The adjusted combined plan

[0104] Set C: Reactor C1 provides 15m 3 / h processing capacity. Set B: Reactor B1 provides 5m 3 / h processing capacity, and the adjusted water volume and number of cycles are sufficient to supplement the insufficient part. At this time, F_total = 15 + 5 = 20m 3 / h, meeting the processing requirements.

[0105] Option 2: Enable multiple reactors in set B

[0106] If multiple reactors in set B can provide partial processing capacity, we can jointly adjust multiple reactors to meet the demand. Suppose there are 3 reactors in set B, and the maximum processing capacity of each reactor is 8m 3 / h. Set C: Provide 12m 3 / h processing capacity (for example, there are two reactors in set C, and one of them fails and cannot fully exert its maximum capacity). Set B: The remaining water volume to be processed is 8m 3 / h. Adjust the reactors in set B to ensure that the system can process 8m 3 / h of water volume: Suppose reactor B1 provides 4m 3 / h, and reactor B2 provides 4m 3 / h, and the two together can meet the demand of 8m 3 / h. The water volume of each reactor is adjusted according to the degree of performance degradation, and the number of cycles is increased to compensate for the insufficient processing capacity.

[0107] Example 2: Combined solution

[0108] Set C: Reactor C1 provides a treatment capacity of 12 m 3 / h. Set B: Reactors B1 and B2 together provide a treatment capacity of 8 m 3 / h. At this time, F_total = 12 + 8 = 20 m 3 / h, meeting the treatment requirements.

[0109] According to the control instruction, the reclaimed water in the regulating tank is lifted to the bioreactor by a lift pump for treatment. The treated reclaimed water is transported to the clear water tank for disinfection and then reserved. Ultraviolet light, ozone or sodium hypochlorite is used for disinfection to kill pathogenic microorganisms in the water and ensure water quality safety. The reservation includes for campus greening irrigation, toilet flushing, road cleaning, etc. The remaining part can be safely discharged into natural water bodies, including the following steps:

[0110] After the reclaimed water undergoes pretreatment, it enters the DMBR dual-membrane internal circulation bioreactor. The reclaimed water after aerobic aeration and biological treatment is pumped out through membrane filtration. The DMBR dual-membrane internal circulation bioreactor uses membrane separation equipment to intercept the activated sludge and macromolecular organic substances in the biochemical reaction tank.

[0111] The bioreactor in this application is a DMBR dual-membrane internal circulation bioreactor, belonging to an integrated integrated treatment process, with the advantages of short treatment process, small floor area, high reaction efficiency, good effluent water quality, etc. The DMBR dual-membrane internal circulation bioreactor is based on biological membranes and immersed microfiltration membranes, adopts a specific internal structure, and performs intermittent alternative aeration, using air flow to form an internal circulation. One reactor alternately forms an anaerobic-anoxic-aerobic environment to achieve the purpose of biological oxidation for nitrogen and phosphorus removal.

[0112] Please refer to Figure 2 as shown, the working process of the DMBR dual-membrane internal circulation bioreactor is as follows:

[0113] ①. The low-concentration organic reclaimed water passes through the grille and screen to remove particles and sundries larger than 2 mm to avoid clogging subsequent equipment;

[0114] ②. The low-concentration organic reclaimed water after passing through the grille is lifted to the DMBR dual-membrane internal circulation bioreactor by a lift pump.

[0115] The DMBR dual-membrane internal circulation bioreactor is divided into a biological membrane reaction area and a microfiltration membrane filtration area. The reclaimed water mixed liquor forms an internal circulation between the two partitions under the action of the aeration air flow. The biological membrane reaction area is provided with a water distribution device, biological membrane fillers, an aeration device and an intake electric valve. The microfiltration membrane filtration area is provided with an immersed microfiltration membrane module, an aeration flushing device and an intake electric valve.

[0116] The reclaimed water mixture evenly enters the biological membrane reaction zone through the water distribution device. The intake electric valve of the packed biological membrane reaction zone is opened intermittently to alternately form an anaerobic-anoxic-aerobic environment, completing the aerobic nitrification and phosphorus uptake, anoxic denitrification reaction, and anaerobic phosphorus release reactions of microorganisms, achieving the effect of nitrogen and phosphorus removal. The reclaimed water mixture after the reaction forms an internal circulation under the action of the air flow, flows through the microfiltration membrane filtration zone, and the detached biological membranes and particulate matters are intercepted by the microfiltration membrane and returned to the biological membrane reaction zone with the water flow. The clear water passes through the microfiltration membrane module and converges into the clear water tank.

[0117] The DMBR dual-membrane internal circulation bioreactor organically combines the A / A / O process, biological membrane method, and MBR membrane method through a series of innovations inside the reactor. It gives full play to the advantages of the A / A / O process with good nitrogen and phosphorus removal effect, less excess sludge in the biological membrane method, and good effluent water quality of organic matter and suspended solids in the MBR membrane bioreactor. Compared with the above single processes, it has incomparable advantages:

[0118] ①. Compared with the conventional A / A / O process, the DMBR dual-membrane internal circulation bioreactor has better effluent water quality, less excess sludge volume, and smaller floor area;

[0119] ②. Compared with the conventional biological membrane method, it has better nitrogen and phosphorus removal effect and better effluent water quality, and smaller floor area;

[0120] ③. Compared with the conventional MBR membrane process, it has better nitrogen and phosphorus removal effect, uses one gas for two purposes, and has lower energy consumption.

[0121] The DMBR dual-membrane internal circulation bioreactor is divided into an equipment room, a composite anaerobic membrane bioreaction zone, and a composite aerobic membrane bioreaction zone according to the plane function. The DMBR dual-membrane internal circulation bioreactor organically combines the inverted A / A / O process of anoxic-anaerobic-aerobic with the MBR membrane bioreaction system and forms two major functional zones, namely the composite anaerobic membrane bioreaction zone and the composite aerobic membrane bioreaction zone. An internal circulation is formed between the two major zones through a special device to form an anaerobic-anoxic-aerobic microbial growth environment, completing the aerobic nitrification and phosphorus uptake, anoxic denitrification reaction, and anaerobic phosphorus release reactions of microorganisms, achieving the purpose of biological nitrogen and phosphorus removal. Water is distributed on both sides of the MBR membrane reaction zone, and the reclaimed water mixture in the central area forms an internal circulation vertically under the action of the membrane flushing air flow, achieving the functions of flushing, aeration, and mixing, using one gas for multiple purposes, and thus having lower energy consumption than the conventional MBR; special biological fixatives are installed in the anoxic zone, anaerobic zone, and aerobic zone to fix microorganisms, thus saving the stirring energy consumption and having less excess sludge; special built-in devices are equipped in the DMBR membrane reactor, and the core components of the DMBR membrane reaction zone adopt new membrane modules, which have the advantages of large flux, good chemical stability, long cleaning cycle, and long service life compared with other membrane modules on the current market.

[0122] In this application, the main design parameters of the DMBR dual-membrane internal circulation bioreactor are as follows:

[0123] Sludge concentration: 4000 - 7000 mg / L;

[0124] Sludge loading: 0.05 - 0.10 kg BOD5 / (kg MLSS·d);

[0125] Volumetric loading: 0.4 - 0.6 kg BOD5 / (m 3 ·d);

[0126] Surplus sludge production: When no chemicals are added, 0.2 - 0.3 kg of sludge is produced per 1 kg of BOD5 removed; when chemicals are added, 0.4 - 0.6 kg;

[0127] Air-water ratio: For rural sewage in Guangxi, 8 - 10:1;

[0128] Land occupation index: 0.3 - 0.5 ㎡ / (m 3 .d).

[0129] Example 3: The reclaimed water recycling and regulation system described in this example includes a pre-filtration unit, a reclaimed water regulation unit, a reactor set division unit, and an intelligent regulation unit;

[0130] Pre-filtration unit: Collects reclaimed water and performs pre-filtration. The reclaimed water treatment water source includes swimming pool drainage, rainwater, and reclaimed water from new buildings. Large particulate impurities (such as leaves, plastics, etc.) in the reclaimed water are filtered through a two-stage basket grille to prevent subsequent equipment blockage, and the pre-filtered reclaimed water is transmitted to the reclaimed water regulation unit;

[0131] Reclaimed water regulation unit: Regulates the water volume and quality of reclaimed water to make the water quality and water volume in the subsequent treatment process relatively stable, ensuring the consistency of treatment effects. The regulated reclaimed water enters the intelligent regulation unit;

[0132] Reactor set division unit: Analyzes the operating status of multiple interconnected bioreactors, and based on the analysis results, all bioreactors are respectively classified into set A, set B, and set C. The set division results are sent to the intelligent regulation unit;

[0133] Intelligent regulation unit: Closes the bioreactors in set A, and after intelligently regulating the circulation times and treatment water volume of the bioreactors in set B, combines set B and set C to output control instructions for the bioreactors. According to the control instructions, the reclaimed water in the regulating tank is lifted to the bioreactor for treatment through a lift pump. The treated reclaimed water is disinfected and then reserved. Ultraviolet light, ozone, or sodium hypochlorite is used for disinfection to kill pathogenic microorganisms in the water and ensure water quality safety. The reservation includes for campus greening irrigation, toilet flushing, road cleaning, etc., and the remaining part can be safely discharged into natural water bodies.

[0134] The above formulas are all dimensionless and only take their numerical values for calculation. The formulas are obtained by collecting a large amount of data and performing software simulations to get a formula that is closest to the actual situation. The preset parameters in the formulas are set by those skilled in the art according to the actual situation.

[0135] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0136] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not elaborate on all the details, nor do they limit the present invention to only the specific embodiments. Obviously, according to the content of this specification, many modifications and variations can be made. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A method for regulating the recycling and utilization of reclaimed water, characterized in that: The regulation method includes the following steps: The water collection device collects reclaimed water and conducts pre-filtration. The reclaimed water after pre-filtration enters the regulation tank for water volume and water quality regulation; Analyze the operating states of multiple interconnected bioreactors. According to the analysis results, all bioreactors are respectively classified into set A, set B, and set C, and the bioreactors in set A are shut down; After intelligently regulating the circulation times and treated water volumes of the bioreactors in set B, combine set B and set C to output control instructions for the bioreactors. According to the control instructions, lift the reclaimed water in the regulation tank to the bioreactors through a lift pump for treatment, and the treated reclaimed water is transported to the clear water tank for disinfection and then standby.

2. The method for regulating and controlling the recycling and utilization of reclaimed water according to claim 1, wherein: Analyze the operating states of multiple interconnected bioreactors, including the following steps: Obtain the water distribution flow deviation, membrane flux accumulation factor, and air flow fluctuation amplitude of the aeration device of the bioreactor; Comprehensively calculate the water distribution flow deviation, membrane flux accumulation factor, and air flow fluctuation amplitude of the aeration device to obtain the abnormal index of the bioreactor. The expression is: In the formula, is the anomaly index, Jer is the membrane flux accumulation factor, F_Dev is the deviation of the water distribution flow rate, S_Dev is the amplitude of the air flow rate fluctuation of the aeration device, and α, β, and γ are adjustment coefficients, and α, β, and γ are all greater than 0.

3. The method for regulating the recycling and utilization of reclaimed water according to claim 2, characterized in that: According to the analysis results, classify all bioreactors into set A, set B, and set C respectively, including the following steps: Compare the obtained abnormal index with a preset first index threshold and a second index threshold. The first index threshold is used to judge whether there is an abnormality in the operation of the bioreactor, and the second index threshold is used to judge the severity of the abnormality of the bioreactor, and the first index threshold is less than the second index threshold; If the abnormal index is less than or equal to the first index threshold, judge that there is no abnormality in the operation of the bioreactor, and classify the bioreactor into set C; If the abnormal index is less than or equal to the second index threshold and greater than the first index threshold, judge that there is a slight abnormality in the operation of the bioreactor, and classify the bioreactor into set B; If the abnormal index is greater than the second index threshold, judge that there is a serious abnormality in the operation of the bioreactor, and classify the bioreactor into set A.

4. The method for regulating the recycling and utilization of reclaimed water according to claim 3, wherein: Intelligently regulate the circulation times and treated water volumes of the bioreactors in set B, including the following steps: The water volume treated by the bioreactor in set B is regulated by the anomaly index, and the regulation algorithm expression is: In the formula, sl new is the treated water volume after regulation, sl old is the treated water volume before regulation, is the anomaly index; Generate the circulation times of the bioreactor according to the regulated treated water volume. The expression is: In the formula, C r is the current number of loop times, C0 is the initial number of loop times, sl new is the treated water volume after regulation, sl old is the treated water volume before regulation, is the ceiling symbol.

5. A method for regulating the recycling and utilization of reclaimed water according to claim 4, characterized in that: Combine set B and set C to output control instructions for the bioreactors, including the following steps: Obtain the numbers of the bioreactors in set C and set B. Give priority to using the bioreactors in set C. If the operation of the bioreactors in set C meets the reclaimed water treatment efficiency of the regulation system, do not start the bioreactors in set B. If the operation of the bioreactors in set C does not meet the reclaimed water treatment efficiency of the regulation system, for each bioreactor in set B, allocate the workload based on the regulated treated water volume and circulation times.

6. The regulation method for reclaimed water recycling utilization according to claim 5, characterized in that: The regulation system obtains the acceptance value by subtracting the current estimated reclaimed water treatment efficiency from the expected reclaimed water treatment efficiency. If the acceptance value is less than or equal to the acceptance threshold, it indicates that the decline range of the reclaimed water treatment efficiency is still within the acceptable range. If the acceptance value is greater than the acceptance threshold, it indicates that the decline range of the reclaimed water treatment efficiency is not within the acceptable range, and the regulation system sends a warning signal to relevant management personnel for reminder.

7. A method for regulating the recycling and utilization of reclaimed water according to claim 6, characterized in that: The calculation expression of the water distribution flow deviation is as follows: In the formula, F_Dev is the water distribution flow deviation, and Q total is the total water flow of the water distribution device, and Q i is the water flow of the i-th water distribution port, and n is the number of water distribution ports; The calculation expression of the membrane flux accumulation factor is as follows: In the formula, is the membrane flux accumulation factor, 0 to t is the monitoring time period, C p (τ) is the membrane flux at time τ; The calculation logic for the amplitude of the air flow rate fluctuation of the aeration device is as follows: within the monitoring time period, obtain the air flow rates of the aeration device at multiple time points, and calculate the amplitude of the air flow rate fluctuation of the aeration device based on the air flow rates at multiple time points. The expression is as follows: In the formula, S_Dev is the amplitude of the air flow rate fluctuation of the aeration device, m is the number of time points, L i is the air flow rate of the aeration device at the i-th time point, L total is the total air flow rate of the aeration device within the monitoring time period.

8. A method for regulating the recycling and utilization of reclaimed water according to claim 7, characterized in that: The bioreactor is a DMBR dual-membrane internal circulation bioreactor, which includes a biofilm reaction zone and a microfiltration membrane filtration zone. The intermediate water mixture forms an internal circulation in the biofilm reaction zone and the microfiltration membrane filtration zone under the action of the aeration airflow. The biofilm reaction zone is provided with a water distribution device, a biofilm packing, an aeration device and an air inlet electric valve, and the microfiltration membrane filtration zone is provided with an immersed microfiltration membrane module, an aeration flushing device and an air inlet electric valve.

9. The regulation method for reclaimed water recycling and utilization according to claim 8, characterized in that: The working process of the DMBR dual-membrane internal circulation bioreactor is as follows: The intermediate water mixture enters the biofilm reaction zone evenly through the water distribution device. The air inlet electric valve of the packing biofilm reaction zone is opened intermittently to alternately form an anaerobic-anoxic-aerobic environment, and complete the aerobic nitrification and phosphorus absorption of microorganisms, the anoxic denitrification reaction, and the anaerobic phosphorus release reaction. The intermediate water mixture after the reaction forms an internal circulation under the action of the airflow, flows through the microfiltration membrane filtration zone, and the shed biofilm and particulate matter are intercepted by the microfiltration membrane and returned to the biofilm reaction zone with the water flow, and the clear water passes through the microfiltration membrane module and flows into the clear water tank.

10. A reclaimed water recycling and regulation system for implementing the regulation method according to any one of claims 1-9, characterized in that: It includes a pre-filtration unit, an intermediate water regulation unit, a reactor set division unit, and an intelligent regulation unit; Pre-filtration unit: used to collect intermediate water and perform pre-filtration; Intermediate water regulation unit: used to regulate the water volume and water quality of the intermediate water; Reactor set division unit: analyze the operating status of multiple interconnected bioreactors, and divide all bioreactors into set A, set B, and set C respectively according to the analysis results; Intelligent regulation unit: shut down the bioreactors in set A, and after intelligently regulating the circulation times and treated water volumes of the bioreactors in set B, combine set B and set C to output control instructions for the bioreactors, and lift the intermediate water in the regulation tank to the bioreactors for treatment through a lift pump according to the control instructions. The treated intermediate water is disinfected and reserved.

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