Ceramic membrane filtration sewage treatment system based on fine control

Abstract

The invention relates to the field of sewage treatment, in particular to a ceramic membrane filtration sewage treatment system based on fine control, comprising: a sewage treatment module for collecting and purifying medical sewage discharged from each discharge end; the drainage monitoring module is used for monitoring the discharge characteristics of the to-be-treated sewage and determining the component action coefficient of the to-be-treated sewage according to the discharge characteristics so as to determine whether precipitation treatment is carried out or not in the pretreatment process; the monitoring analysis module is used for determining a sludge monitoring mode according to the sewage influence parameters and the component action coefficients; the sludge monitoring module is used for periodically monitoring the reaction state of the activated sludge according to the sludge monitoring mode; the sludge adjusting module is used for adjusting the state of activated sludge for treating the current sewage to be treated; the filtration adjusting module is used for adjusting the sewage flux in the membrane filtration process, and the operation stability of the sewage treatment system is guaranteed.

Description

Technical Field

[0001] The invention relates to the field of sewage treatment, and in particular to a ceramic membrane filtration sewage treatment system based on refined control. Background Art

[0002] Sewage treatment is of great significance for protecting the environment, maintaining ecological balance and human health. Due to the presence of drug residues, bacteria and heavy metal ions in medical wastewater, the activated sludge used in the treatment of medical wastewater is easily affected, resulting in a decrease in the subsequent treatment effect. However, the existing sewage treatment systems often only judge the biological activity of activated sludge by the sewage purification effect and whether the state of activated sludge is in the expected state. However, at this time, the sewage purification process has been affected. Therefore, how to timely and accurately warn of the state of activated sludge is an urgent problem to be solved by technical personnel in this field.

[0003] Chinese patent publication number CN117699964A discloses a sewage treatment process based on aerobic granular sludge and a monitoring method thereof, including: a water volume control module for controlling the sewage inflow in an active aerobic pool based on a single sewage treatment quantitative index, and putting a target amount of aerobic granular sludge into the active aerobic pool; a data acquisition module for supplying oxygen and mechanically intervening in the active aerobic pool based on the putting result, and collecting the index change value of the sewage treatment observation index in real time; a sewage treatment module for comprehensively analyzing the index change value of the treatment observation index based on the influencing factor of each treatment observation index, determining the amplitude of sewage water quality change, and dynamically optimizing the sewage treatment process of aerobic granular sludge when the amplitude of sewage water quality change does not meet the treatment standard. The above technical solution has the following problems: it fails to select the corresponding sludge monitoring method according to the actual situation of the sewage to be treated in the actual process, and fails to make a sludge state warning in advance according to the change trend of the sludge state, so that there is a delay in the judgment of the activated sludge state, thereby affecting the sewage treatment effect. Summary of the invention

[0004] To this end, the present invention provides a ceramic membrane filtration sewage treatment system based on refined control, which is used to overcome the problem that the prior art fails to select the corresponding sludge monitoring method according to the actual situation of the sewage to be treated in the actual process, and makes a sludge status warning in advance according to the changing trend of the sludge state, resulting in a delay in the judgment of the activated sludge state, thereby affecting the sewage treatment effect.

[0005] To achieve the above object, the present invention provides a ceramic membrane filtration sewage treatment system based on refined control, comprising:

[0006] Sewage treatment module, used to collect and purify medical sewage discharged from each discharge end;

[0007] A drainage monitoring module, which is connected to the sewage treatment module, is used to monitor the discharge characteristics of the sewage to be treated, and determine the component action coefficient of the sewage to be treated according to the discharge characteristics to determine whether sedimentation treatment is performed during the pretreatment process;

[0008] A monitoring and analysis module, which is connected to the sewage treatment module and the drainage monitoring module respectively, and is used to determine the sludge monitoring method according to the sewage influencing parameters and component action coefficients;

[0009] A sludge monitoring module, which is connected to the sewage treatment module and the monitoring and analysis module respectively, and is used to respond to the sewage influencing parameters and component action coefficients of the monitoring conditions, so as to correspondingly determine whether to detect the sedimentation performance parameters or the sludge expansion change values;

[0010] A sludge regulating module, which is connected to the sludge monitoring module and is used to regulate the state of the activated sludge treating the sewage to be treated;

[0011] The filtration regulating module is respectively connected to the sewage treatment module and the sludge monitoring module, and is used to regulate the sewage flux in the membrane filtration process.

[0012] Furthermore, the sewage treatment module comprises:

[0013] Drainage unit, used to collect medical sewage discharged from each discharge end;

[0014] A coarse filtration unit, which is connected to the drainage unit and is used to perform coarse filtration on the collected sewage to remove solid impurities in the water and obtain sewage to be treated;

[0015] A pretreatment unit, which is connected to the coarse filtration unit and is used to pretreat the wastewater to be treated after the coarse filtration, so as to adjust the pH value, organic matter content and chemical composition content of the wastewater to be treated;

[0016] A sludge reaction unit, which is connected to the pretreatment unit and is used to perform activated sludge treatment on the pretreated sewage to be treated, so as to degrade organic matter in the sewage to be treated;

[0017] A ceramic membrane reaction unit, which is connected to the sludge reaction unit and is used to perform fine filtration and purification on the untreated sewage that has completed the activated sludge process to remove tiny particles in the sewage;

[0018] The oxidation unit is connected to the ceramic membrane reaction unit and is used for oxidizing the sewage discharged from the ceramic membrane reaction unit to remove residual organic matter and microbial metabolites.

[0019] Furthermore, the drainage monitoring module monitors the discharge characteristics of the sewage to be treated in response to the sewage treatment conditions, wherein the discharge characteristics include port information of the relevant discharge ends of the sewage to be treated and the proportion of sewage at each relevant discharge end;

[0020] The sewage treatment condition is that the volume increase value of the sewage to be treated in the transition tank is greater than a preset volume increase value.

[0021] Furthermore, the discharge monitoring module determines the component action coefficient of the sewage to be treated according to the historical components and historical concentrations of each relevant discharge end of the sewage to be treated, and when the sedimentation condition responded by the discharge monitoring module is that the response component action coefficient is greater than the preset component action coefficient, sedimentation treatment is performed on the sewage to be treated;

[0022] For a single historical component, the historical concentration of the historical component is determined based on the concentration values ​​recorded for each historical component and the accuracy coefficient of each historical component record.

[0023] Furthermore, the monitoring and analysis module determines the sludge monitoring method according to the sewage influencing parameters and the component action coefficients for the sludge treatment stage of the sewage to be treated obtained once, and the sludge monitoring module performs periodic monitoring on the reaction state of the activated sludge according to the sludge monitoring method;

[0024] The sewage impact parameter is determined based on the heavy metal ion content in the historical composition records of each relevant discharge end in the sewage to be treated.

[0025] Furthermore, the monitoring condition responded by the sludge monitoring module is that the sewage influence parameter is greater than the preset sewage influence parameter, and it is determined to periodically detect the sedimentation performance parameter, and the abnormal fluctuation duration of the sedimentation performance parameter is determined according to the sedimentation performance parameter obtained from each detection, and the sludge state is determined according to the abnormal fluctuation duration of the sedimentation performance parameter;

[0026] The sedimentation performance parameter is determined according to the sedimentation ratio of the activated sludge.

[0027] Furthermore, the monitoring conditions responded by the sludge monitoring module are that the sewage influencing parameter is less than or equal to the preset sewage influencing parameter and the component action coefficient is greater than the preset component action coefficient. The sludge expansion change values ​​of different sub-areas in the sludge reaction tank are periodically detected, and the sub-areas with sludge expansion change values ​​greater than the preset expansion change values ​​are recorded as key areas, and the sludge state is determined according to the proportion of the key areas.

[0028] Furthermore, the abnormal condition responded by the sludge monitoring module is that the abnormal fluctuation duration is greater than the preset abnormal fluctuation duration or the key area proportion is greater than the preset key area proportion, and it is determined that the activated sludge in the sludge reaction process is in an abnormal state, and a sludge status warning is sent to the user.

[0029] Furthermore, the sludge adjustment module responds to the early warning condition and adjusts the state of the activated sludge treating the current sewage to be treated. The state adjustment includes:

[0030] The target population microbial content of activated sludge in different sub-areas is tested, and the circulation speed of the circulating liquid in the process of adjusting the dissolved oxygen content is increased and adjusted according to the difference value of the target population microbial content of the sub-areas;

[0031] The increase in the circulation speed is positively correlated with the difference in the content of target microorganisms.

[0032] The warning condition is that the sludge monitoring module determines that the activated sludge in the sludge reaction process is in an abnormal state, and sends a sludge state warning to the user.

[0033] Furthermore, the filtration adjustment condition responded by the filtration adjustment module is that the activated sludge is in an abnormal state, and the sewage flux of the membrane filtration process is reduced and adjusted according to the abnormal fluctuation duration or the proportion of the key area;

[0034] The reduction value of the sewage flux is positively correlated with the duration of abnormal fluctuation;

[0035] The reduction value of the sewage flux is positively correlated with the proportion of the key area.

[0036] Compared with the prior art, the beneficial effect of the present invention lies in that the technical scheme of the present invention determines a targeted sludge monitoring method according to the actual harmful components of the sewage to be treated, and predicts the sludge state according to the abnormal fluctuation duration or the proportion of key areas obtained by monitoring, thereby ensuring the timeliness of the judgment of the sludge state so that it will not affect the subsequent sewage treatment process, thereby avoiding the impact on the sewage treatment system. The present invention ensures the stability of the operation of the sewage treatment system.

[0037] Furthermore, in the present invention, the component action coefficient of the sewage to be treated is obtained according to the historical components and historical concentrations of each relevant discharge end, and it is determined whether to perform sedimentation treatment on the sewage to be treated during the pretreatment process according to the component action coefficient, so as to ensure the accuracy of the component action coefficient of the sewage to be treated, and then ensure the effectiveness of the pretreatment of the sewage to be treated, avoid the residual drug components in the sewage to be treated from causing excessive influence on the activated sludge, and ensure the stability of the sewage treatment process.

[0038] Furthermore, in the present invention, when the sewage influencing parameter is greater than the preset sewage influencing parameter, the sludge monitoring module periodically detects the sedimentation performance parameter, determines the fluctuation state of the sedimentation performance parameter according to the sedimentation performance parameter obtained from each detection, and determines the sludge state according to the abnormal fluctuation duration of the sedimentation performance parameter. Since there are residual heavy metal ions in medical sewage, if the concentration of heavy metal ions is too high, it is easy to affect the sedimentation performance of the activated sludge. The sludge state is estimated based on the fluctuation of the sedimentation performance parameters over a period of time, which can ensure the accuracy of the judgment result while ensuring timely judgment results.

[0039] Furthermore, in the present invention, when the sewage influencing parameter is less than or equal to the preset sewage influencing parameter and the component action coefficient is greater than the preset component action coefficient, the sludge monitoring module periodically detects the sludge swelling change values ​​in different areas of the sludge reaction tank, and records the areas where the sludge swelling change values ​​are greater than the preset swelling change values ​​as key areas. The sludge state is determined according to the proportion of the key areas, and the sludge swelling conditions in different areas are monitored in real time to monitor the impact of residual drug components on the activated sludge, so that the system can ensure the accuracy of the judgment results while ensuring timely judgment results.

[0040] Furthermore, in the present invention, when the activated sludge is in an abnormal state, adjustments are made to the activated sludge and the membrane filtration process. By adjusting the biological state of the activated sludge in advance, the impact of the abnormal sludge state on other links and subsequent treatments of the sewage treatment system is avoided. The present invention ensures the stability of the operation of the sewage treatment system. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 This is a module connection diagram of a ceramic membrane filtration sewage treatment system based on refined control of the present invention;

[0042] Figure 2 It is a unit connection diagram of the sewage treatment module of the present invention;

[0043] Figure 3 This is a flow chart of the present invention for determining whether to perform sedimentation treatment during the pretreatment process according to the component action coefficient of the sewage to be treated;

[0044] Figure 4 The present invention is a flow chart for determining the sludge monitoring method according to sewage influencing parameters and component action coefficients. DETAILED DESCRIPTION

[0045] In order to make the objects and advantages of the present invention more clearly understood, the present invention is further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0046] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0047] It should be noted that, in the description of the present invention, terms such as "up", "down", "left", "right", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0048] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] See also Figures 1 to 4 As shown, the present invention provides a ceramic membrane filtration sewage treatment system based on refined control, comprising:

[0050] Sewage treatment module, used to collect and purify medical sewage discharged from each discharge end;

[0051] A drainage monitoring module, which is connected to the sewage treatment module, is used to monitor the discharge characteristics of the sewage to be treated, and determine the component action coefficient of the sewage to be treated according to the discharge characteristics to determine whether sedimentation treatment is performed during the pretreatment process;

[0052] A monitoring and analysis module, which is connected to the sewage treatment module and the drainage monitoring module respectively, and is used to determine the sludge monitoring method according to the sewage influencing parameters and component action coefficients;

[0053] A sludge monitoring module, which is connected to the sewage treatment module and the monitoring and analysis module respectively, and is used to respond to the sewage influencing parameters and component action coefficients of the monitoring conditions, so as to correspondingly determine whether to detect the sedimentation performance parameters or the sludge expansion change values;

[0054] A sludge regulating module, which is connected to the sludge monitoring module and is used to regulate the state of the activated sludge treating the sewage to be treated;

[0055] The filtration regulating module is respectively connected to the sewage treatment module and the sludge monitoring module, and is used to regulate the sewage flux in the membrane filtration process.

[0056] Among them, the application scenario in the present invention is to treat medical wastewater generated by different departments of the hospital. The treated wastewater is all medical wastewater. Different discharge ends indicate different sources of wastewater. Each discharge end corresponds to a hospital department. Hospital departments include but are not limited to internal medicine, emergency department, obstetrics and gynecology, and surgery. It is easy to understand that there are differences in the composition of medical wastewater discharged from different discharge ends.

[0057] Specifically, the sewage treatment module includes:

[0058] Drainage unit, used to collect medical sewage discharged from each discharge end;

[0059] A coarse filtration unit, which is connected to the drainage unit and is used to perform coarse filtration on the collected sewage to remove solid impurities in the water and obtain sewage to be treated;

[0060] A pretreatment unit, which is connected to the coarse filtration unit and is used to pretreat the wastewater to be treated after the coarse filtration, so as to adjust the pH value, organic matter content and chemical composition content of the wastewater to be treated;

[0061] A sludge reaction unit, which is connected to the pretreatment unit and is used to perform activated sludge treatment on the pretreated sewage to be treated, so as to degrade organic matter in the sewage to be treated;

[0062] A ceramic membrane reaction unit, which is connected to the sludge reaction unit and is used to perform fine filtration and purification on the untreated sewage that has completed the activated sludge process to remove tiny particles in the sewage;

[0063] The oxidation unit is connected to the ceramic membrane reaction unit and is used for performing advanced oxidation treatment on the sewage discharged from the ceramic membrane reaction unit to remove residual organic matter and microbial metabolites.

[0064] The coarse filtration unit performs preliminary physical filtration on the sewage by means of a filtration device arranged in the coarse filtration unit, such as a coarse grid or a screen; in the present invention, a plurality of transition tanks are arranged, and the sewage to be treated after the coarse filtration treatment is discharged into the transition tank, and the pretreatment process is completed in the transition tank. The pretreatment unit performs pretreatment operations on the sewage to be treated in the transition tank, and the pretreatment operations include but are not limited to adjusting the pH value of the sewage, removing part of the organic matter, and sedimentation treatment; in the present invention, the sludge reaction unit completes the activated sludge reaction in the sludge reaction tank, and by mixing the activated sludge with the sewage to be treated after the pretreatment process, based on the activated sludge, the activated sludge is filtered out and the pretreatment process is completed. The sludge method is used to purify the sewage to be treated, and remove organic matter, nitrogen, phosphorus and other pollutants in the sewage to be treated; the ceramic membrane reaction unit further filtrates and purifies the sewage through the ceramic membrane. The ceramic membrane filtration method used in the present invention includes but is not limited to the hollow fiber ceramic membrane method or the flat ceramic membrane method. A layer of ceramic membrane is coated on the fiber cloth, and the ceramic membrane tube is installed in the membrane shell to form a ceramic membrane assembly. The sewage to be treated passes through the membrane shell and enters the interior of the ceramic membrane, and is filtered by the ceramic membrane, thereby separating impurities, suspended matter and microorganisms such as bacteria in the water. Before the sewage to be treated is treated for the first time, it is necessary to discharge the impurities in the membrane. Air and impurities, during the treatment process, the water pressure and water flow parameters are regulated according to the actual working scene to ensure the normal operation of the membrane assembly; oxidation unit, using a strong oxidant to perform advanced oxidation treatment on the sewage, the advanced oxidation treatment process is to use a specific catalyst and an oxidant to generate active oxygen species to accelerate the oxidation and degradation process of organic matter, during the treatment process, the catalyst can absorb light energy or oxygen to generate high-energy active oxygen species, such active oxygen species can further degrade organic matter in sewage by directly oxidizing organic pollutants and decomposing them into small molecules or harmless substances, the advanced oxidation treatment method used in the present invention includes but is not limited to ozone oxidation, photocatalytic oxidation, ozone-hydrogen peroxide mixed treatment and ozone-ultraviolet combined technology, the oxidants used include but are not limited to chlorine, potassium permanganate and blue oxygen, the catalyst used can be titanium dioxide and metal ions such as iron and chromium, the generated active oxygen species include but are not limited to superoxide ions and hydroxyl radicals, how to complete the treatment of sewage by the above-mentioned units is easy to understand for those skilled in the art, and will not be repeated here, the present invention does not specifically limit the device model used by each unit in the sewage treatment module, and the user can make an adaptive choice according to the actual working scene.

[0065] Specifically, the drainage monitoring module responds to the sewage treatment conditions and monitors the discharge characteristics of the sewage to be treated, wherein the discharge characteristics include the port information of the relevant discharge ends of the sewage to be treated and the sewage proportion of each relevant discharge end;

[0066] The sewage treatment condition is that the volume increase value of the sewage to be treated in the transition tank is greater than a preset volume increase value.

[0067] Among them, if there is medical sewage discharged from a discharge end in the sewage to be treated, the discharge end is determined to be the relevant discharge end of the sewage to be treated, and the hospital department corresponding to the relevant discharge end is recorded as the port information. For a single relevant discharge end, the sewage ratio is the ratio of the volume of medical sewage discharged by the relevant discharge end to the volume of the sewage to be treated. The present invention applies a cyclic volume detection cycle, and the duration of the volume detection cycle can be determined by the user according to the actual working scenario. A volume detection cycle duration is provided, and the sludge monitoring cycle is 5 minutes. At the end of each volume detection cycle, the volume of the sewage to be treated in each transition tank is detected. For a single transition tank, the volume increase value is the difference between the volume of the sewage to be treated at the end of the current volume detection cycle and the volume of the sewage to be treated at the end of the previous volume detection cycle. The value of the preset volume increase value can be set by the user according to the actual working scenario. A preset volume increase value is provided, and the value of the preset volume increase value is 50m 3 .

[0068] Specifically, the discharge monitoring module determines the component action coefficient of the sewage to be treated according to the historical components and historical concentrations of each relevant discharge end of the sewage to be treated, and the sedimentation condition responded by the discharge monitoring module is that when the response component action coefficient is greater than the preset component action coefficient, the sewage to be treated is subjected to sedimentation treatment;

[0069] For a single historical component, the historical concentration of the historical component is determined based on the concentration values ​​recorded for each historical component and the accuracy coefficient of each historical component record.

[0070] Among them, for different discharge ends, each discharged medical sewage needs to complete component detection, and the obtained components and concentrations are recorded in the historical component record. Each historical component record only corresponds to the medical sewage discharged from a single discharge end. For a single historical component record, the historical component is the component contained in the historical component record, and the historical component concentration is the concentration of the component contained in the historical component record. The components that may be contained in the sewage to be treated in the present invention include but are not limited to various types of antibiotics, hormones and other drug components. The component action coefficient is the natural logarithm of the product of the number of historical components with an action relationship and the historical concentration of the corresponding historical component. If a chemical reaction can occur between two historical components to produce a new chemical component, and the newly produced chemical component can have a negative impact on the activated sludge, it is judged that the two historical components have an action relationship. For a single historical component, the historical concentration of the historical component is the product of the concentration value of each historical component record and the precision coefficient of each historical component record. The precision coefficient of each historical component record is determined according to the precision of the instrument for each component concentration detection. The higher the precision of the instrument, the greater the precision coefficient of the corresponding historical component record.

[0071] The value of the preset component action coefficient can be set by the user according to actual needs and historical records. The higher the user's requirements for the biological activity of the activated sludge, the smaller the value of the preset component action coefficient. A method for setting the value of the preset component action coefficient is provided. The historical records in which the activated sludge does not appear abnormal are recorded as reference records, and the average value of the preset component action coefficients of each sewage to be treated in the reference records that meet the user's requirements for the biological activity of the activated sludge is set as the preset sewage influence parameter.

[0072] The precipitation treatment is to add a precipitant to the waste liquid to react the drug molecules with the precipitant to generate a water-insoluble precipitate. The precipitants used include but are not limited to aluminum sulfate, calcium hydroxide and sodium sulfide. How to complete the precipitation treatment and how to select a suitable precipitant are contents that are easy to understand for those skilled in the art and will not be elaborated here.

[0073] Specifically, the monitoring and analysis module determines the sludge monitoring method according to the sewage influencing parameters and component action coefficients for the sludge treatment stage of the sewage to be treated obtained once, and the sludge monitoring module performs periodic monitoring on the reaction state of the activated sludge according to the sludge monitoring method;

[0074] The sewage impact parameter is determined based on the heavy metal ion content in the historical composition records of each relevant discharge end in the sewage to be treated.

[0075] Among them, the activated sludge in the present invention is the sludge that reacts with the sewage to be treated in the sludge reaction tank, the starting time of the sludge treatment stage is the time when the sewage to be treated begins to enter the sludge reaction tank, and the ending time of the sludge treatment stage is the time when the sewage to be treated begins to be discharged from the sludge reaction tank, and the sludge reaction tank includes but is not limited to the aeration tank and the secondary sedimentation tank. The sewage impact parameter is the sum of the products of the content of each category of heavy metals and the corresponding impact coefficients. The user can set the impact coefficients corresponding to the content of each category of heavy metals according to the actual working conditions;

[0076] The present invention applies a cyclic sludge monitoring cycle, and the duration of the sludge monitoring cycle can be determined by the user. The higher the user's requirements for the stability of the sewage treatment system operation, the shorter the duration of the sludge monitoring cycle. A sludge monitoring cycle duration is provided, and the sludge monitoring cycle is 15 minutes. At the end of each sludge monitoring cycle, the sedimentation performance parameters of the activated sludge or the sludge expansion change values ​​in different areas are detected.

[0077] Specifically, the monitoring condition responded by the sludge monitoring module is that the sewage influence parameter is greater than the preset sewage influence parameter, and it is determined to periodically test the sedimentation performance parameter, and the abnormal fluctuation duration of the sedimentation performance parameter is determined according to the sedimentation performance parameter obtained from each test, and the sludge state is determined according to the abnormal fluctuation duration of the sedimentation performance parameter;

[0078] The sedimentation performance parameter is determined according to the sedimentation ratio of the activated sludge.

[0079] The value of the preset sewage impact parameter can be set by the user according to actual needs and historical records. The higher the user's requirements for the biological activity of activated sludge, the smaller the value of the preset sewage impact parameter. A method for setting the value of the preset sewage impact parameter is provided, and the average value of the sewage impact parameter of each sewage to be treated in the reference record that meets the user's requirements for the biological activity of activated sludge is set as the preset sewage impact parameter;

[0080] If the sedimentation ratio is within the warning-free range, the sedimentation performance parameter is negatively correlated with the sedimentation ratio of the activated sludge. If the sedimentation ratio is not within the warning-free range, it is determined that the state of the activated sludge is to be adjusted. The present invention does not specifically limit the instrument for quickly detecting the sedimentation ratio of the activated sludge. How to detect the sedimentation ratio of the activated sludge is easy to understand for those skilled in the art and is not described in detail here. For a single moment of sedimentation performance parameter detection, if the absolute value of the difference between the sedimentation performance parameter at this moment and the sedimentation performance parameter at the previous moment is greater than the preset sedimentation performance difference value, it is determined that the sludge monitoring period corresponding to the moment is in an abnormal fluctuation state, and the abnormal fluctuation duration is the product of the number of sludge monitoring periods contained in the abnormal fluctuation interval and the duration of the sludge monitoring period. Any sludge monitoring period within the abnormal fluctuation interval is in an abnormal fluctuation state and the abnormal fluctuation interval contains the sludge monitoring period corresponding to the current moment.

[0081] When the sewage impact parameter is greater than the preset sewage impact parameter, it indicates that the concentration of heavy metal ions in the sewage to be treated may be at a high level, and the activated sludge will show changes in sedimentation performance due to the higher concentration of heavy metal ions. Although the sedimentation performance of the activated sludge reaction process always meets the requirements, judging the sludge state through its fluctuation can make adjustments to the activated sludge as early as possible to avoid affecting the stability of the sewage treatment process.

[0082] Specifically, the monitoring conditions responded by the sludge monitoring module are that the sewage influencing parameter is less than or equal to the preset sewage influencing parameter and the component action coefficient is greater than the preset component action coefficient. The sludge expansion change values ​​of different sub-areas in the sludge reaction tank are periodically detected, and the sub-areas with sludge expansion change values ​​greater than the preset expansion change values ​​are recorded as key areas, and the sludge state is determined according to the proportion of the key areas.

[0083] Among them, the sludge reaction tank is divided into regions, and the bottom areas of the sludge reaction tanks corresponding to the sub-regions are all equal. The present invention does not make specific restrictions on the number of sub-regions obtained by division and the bottom areas of the sludge reaction tanks corresponding to the sub-regions. The user can make adaptive settings according to the actual working scene. For the moment of a single sludge expansion change value detection, the sludge expansion change value is the absolute value of the difference between the activated sludge volume detected at the current moment of each sub-region and the activated sludge volume detected at the end moment of the previous sludge detection cycle. The value of the preset expansion change value can be set by the user according to actual needs and historical records. The higher the user's requirements for the stability of the sewage treatment system operation, the smaller the value of the preset expansion change value. A method for setting the preset expansion change value is provided. The average value of the sludge expansion change value measured at each time in each sub-region in the reference record that meets the user's requirements for the stability of the sewage treatment system operation is recorded as the preset expansion change value. The proportion of key areas = the number of key areas / the number of sub-areas in the sludge reaction tank;

[0084] When the sewage impact parameter of the sewage to be treated is less than or equal to the preset sewage impact parameter and the component action coefficient is greater than the preset component action coefficient, it indicates that the residual drug concentration in the sewage to be treated may be at a high level. Although some residual drug components are removed by sedimentation treatment during the pretreatment process, it is still necessary to monitor in real time whether the activated sludge is affected by the residual drug components. By monitoring the proportion of key areas, it can effectively indicate the extent of the impact on the activated sludge, and then make timely adjustments to the activated sludge to avoid affecting the stability of the sewage treatment process.

[0085] If the sewage influencing parameter is less than or equal to the preset sewage influencing parameter and the component action coefficient is less than or equal to the preset component action coefficient, the sludge monitoring module shall detect the sedimentation ratio of the activated sludge only at the end of the sludge treatment stage, and determine whether to adjust the state of the activated sludge according to the sedimentation ratio. If the sedimentation ratio is not within the corresponding warning-free range, that is, the sedimentation ratio is greater than the minimum value of the warning-free range and less than or equal to the maximum value of the warning-free range, the state of the activated sludge shall be adjusted. The user can adaptively set the warning-free range according to actual conditions, and provide a maximum and minimum value of the warning-free range. The maximum value of the warning-free range is 30%, and the minimum value of the warning-free range is 15%.

[0086] Specifically, the abnormal conditions responded by the sludge monitoring module are that the abnormal fluctuation duration is greater than the preset abnormal fluctuation duration or the proportion of the key area is greater than the preset proportion of the key area. It is determined that the activated sludge in the sludge reaction process is in an abnormal state, and a sludge status warning is sent to the user.

[0087] Among them, the values ​​of the preset abnormal fluctuation duration and the preset critical area ratio can be set by the user according to actual needs and historical records. The higher the user's requirements for the stability of the sewage treatment system operation, the smaller the value of the preset abnormal fluctuation duration, and the smaller the value of the preset critical area ratio. A method for determining the value of the preset abnormal fluctuation duration is provided, and the average value of each abnormal fluctuation duration in the historical record that meets the user's requirements for the stability of the sewage treatment system operation is recorded as the preset abnormal fluctuation duration. A value of the preset critical area ratio is provided, and the average value of the critical area ratio obtained from each detection in the historical record that meets the user's requirements for the stability of the sewage treatment system operation is recorded as the preset critical area ratio.

[0088] Specifically, the sludge regulation module responds to the early warning conditions and adjusts the state of the activated sludge that is currently treating the sewage to be treated. The state adjustment includes:

[0089] The target population microbial content of activated sludge in different sub-areas is tested, and the circulation speed of the circulating liquid in the process of adjusting the dissolved oxygen content is increased and adjusted according to the difference value of the target population microbial content of the sub-areas;

[0090] The increase in the circulation speed is positively correlated with the difference in the content of target microorganisms.

[0091] The warning condition is that the sludge monitoring module determines that the activated sludge in the sludge reaction process is in an abnormal state, and sends a sludge state warning to the user.

[0092] Among them, a number of samples of activated sludge for inspection are randomly extracted from different sub-areas, and the types and quantities of microorganisms contained therein are detected. The target population microorganism content of a single sub-area is the average value of the number of target population microorganisms of each activated sludge for inspection. The target population microorganism content difference value = the sum of the absolute values ​​of the differences between the target population microorganism content of each sub-area and the average target content / the number of sub-areas of the sludge reaction tank. The circulation speed is the flow speed of the circulating liquid in the sludge reaction tank, and the circulating liquid is a mixture of sewage to be treated and activated sludge;

[0093] The target population microorganisms are the microorganisms that the user hopes to be in a dominant state during the activated sludge reaction process. The user can set the target population microorganisms according to actual needs. How to detect the types and quantities of microorganisms is easy to understand for technicians in this field and will not be elaborated here.

[0094] Specifically, the filtration adjustment condition responded by the filtration adjustment module is that the activated sludge is in an abnormal state, and the sewage flux of the membrane filtration process is reduced and adjusted according to the abnormal fluctuation duration or the proportion of the key area;

[0095] The reduction value of the sewage flux is positively correlated with the duration of abnormal fluctuation;

[0096] The reduction value of the sewage flux is positively correlated with the proportion of the key area.

[0097] Among them, when adjusting the sewage flux, if the parameter that determines that the activated sludge is in an abnormal state is the abnormal fluctuation duration, the sewage flux of the membrane filtration process is reduced and adjusted according to the abnormal fluctuation duration; if the parameter that determines that the activated sludge is in an abnormal state is the critical area proportion, the sewage flux of the membrane filtration process is reduced and adjusted according to the critical area proportion, and the sewage flux is the volume of the sewage to be treated that completes the membrane filtration per unit time; since water-insoluble flocs are easily generated when the activated sludge is in an abnormal state, by reducing the sewage flux, it is possible to avoid clogging of the filtration membrane, thereby avoiding affecting the stability of the sewage treatment process.

[0098] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

[0099] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ceramic membrane filtration sewage treatment system based on refined control, characterized in that: include: Sewage treatment module, used to collect and purify medical sewage discharged from each discharge end; A drainage monitoring module, which is connected to the sewage treatment module, is used to monitor the discharge characteristics of the sewage to be treated, and determine the component action coefficient of the sewage to be treated according to the discharge characteristics to determine whether sedimentation treatment is performed during the pretreatment process; A monitoring and analysis module, which is connected to the sewage treatment module and the drainage monitoring module respectively, and is used to determine the sludge monitoring method according to the sewage influencing parameters and component action coefficients; A sludge monitoring module, which is connected to the sewage treatment module and the monitoring and analysis module respectively, and is used to respond to the sewage influencing parameters and component action coefficients of the monitoring conditions, so as to correspondingly determine whether to detect the sedimentation performance parameters or the sludge expansion change values; A sludge regulating module, which is connected to the sludge monitoring module and is used to regulate the state of the activated sludge treating the sewage to be treated; The filtration regulating module is respectively connected to the sewage treatment module and the sludge monitoring module, and is used to regulate the sewage flux in the membrane filtration process.

2. The ceramic membrane filtration sewage treatment system based on refined control according to claim 1 is characterized in that: The sewage treatment module comprises: Drainage unit, used to collect medical sewage discharged from each discharge end; A coarse filtration unit, which is connected to the drainage unit and is used to perform coarse filtration on the collected sewage to remove solid impurities in the water and obtain sewage to be treated; A pretreatment unit, which is connected to the coarse filtration unit and is used to pretreat the wastewater to be treated after the coarse filtration, so as to adjust the pH value, organic matter content and chemical composition content of the wastewater to be treated; A sludge reaction unit, which is connected to the pretreatment unit and is used to perform activated sludge treatment on the pretreated sewage to be treated, so as to degrade organic matter in the sewage to be treated; A ceramic membrane reaction unit, which is connected to the sludge reaction unit and is used to perform fine filtration and purification on the untreated sewage that has completed the activated sludge process to remove tiny particles in the sewage; The oxidation unit is connected to the ceramic membrane reaction unit and is used for oxidizing the sewage discharged from the ceramic membrane reaction unit to remove residual organic matter and microbial metabolites.

3. The ceramic membrane filtration sewage treatment system based on refined control according to claim 2 is characterized in that: The drainage monitoring module responds to the sewage treatment conditions and monitors the discharge characteristics of the sewage to be treated, wherein the discharge characteristics include the port information of the relevant discharge ends of the sewage to be treated and the sewage proportion of each relevant discharge end; The sewage treatment condition is that the volume increase value of the sewage to be treated in the transition tank is greater than a preset volume increase value.

4. The ceramic membrane filtration sewage treatment system based on refined control according to claim 3 is characterized in that: The discharge monitoring module determines the component action coefficient of the sewage to be treated according to the historical components and historical concentrations of each relevant discharge end of the sewage to be treated, and when the sedimentation condition responded by the discharge monitoring module is that the response component action coefficient is greater than the preset component action coefficient, sedimentation treatment is performed on the sewage to be treated; For a single historical component, the historical concentration of the historical component is determined based on the concentration values ​​recorded for each historical component and the accuracy coefficient of each historical component record.

5. The ceramic membrane filtration sewage treatment system based on refined control according to claim 4 is characterized in that: The monitoring and analysis module determines the sludge monitoring method according to the sewage influencing parameters and component action coefficients for the sludge treatment stage of the sewage to be treated obtained once, and the sludge monitoring module performs periodic monitoring on the reaction state of the activated sludge according to the sludge monitoring method; The sewage impact parameter is determined based on the heavy metal ion content in the historical composition records of each relevant discharge end in the sewage to be treated.

6. The ceramic membrane filtration sewage treatment system based on refined control according to claim 5 is characterized in that: The monitoring condition responded by the sludge monitoring module is that the sewage influence parameter is greater than the preset sewage influence parameter, and the sedimentation performance parameter is determined to be tested periodically, and the abnormal fluctuation duration of the sedimentation performance parameter is determined according to the sedimentation performance parameter obtained from each test, and the sludge state is determined according to the abnormal fluctuation duration of the sedimentation performance parameter; The sedimentation performance parameter is determined according to the sedimentation ratio of the activated sludge.

7. The ceramic membrane filtration sewage treatment system based on refined control according to claim 6 is characterized in that: The monitoring conditions responded by the sludge monitoring module are that the sewage influencing parameter is less than or equal to the preset sewage influencing parameter and the component action coefficient is greater than the preset component action coefficient. The sludge expansion change values ​​of different sub-areas in the sludge reaction tank are periodically detected, and the sub-areas with sludge expansion change values ​​greater than the preset expansion change values ​​are recorded as key areas. The sludge state is determined according to the proportion of the key areas.

8. The ceramic membrane filtration sewage treatment system based on refined control according to claim 7 is characterized in that: The abnormal conditions responded by the sludge monitoring module are that the abnormal fluctuation duration is greater than the preset abnormal fluctuation duration or the key area proportion is greater than the preset key area proportion. It is determined that the activated sludge in the sludge reaction process is in an abnormal state, and a sludge status warning is sent to the user.

9. The ceramic membrane filtration sewage treatment system based on refined control according to claim 8 is characterized in that: The sludge regulation module responds to the early warning conditions and adjusts the state of the activated sludge that is currently treating the sewage to be treated. The state adjustment includes: The target population microbial content of activated sludge in different sub-areas is tested, and the circulation speed of the circulating liquid in the process of adjusting the dissolved oxygen content is increased and adjusted according to the difference value of the target population microbial content of the sub-areas; The increase in the circulation speed is positively correlated with the difference in the content of target microorganisms. The warning condition is that the sludge monitoring module determines that the activated sludge in the sludge reaction process is in an abnormal state, and sends a sludge state warning to the user.

10. The ceramic membrane filtration sewage treatment system based on refined control according to claim 9 is characterized in that: The filtration adjustment condition responded by the filtration adjustment module is that the activated sludge is in an abnormal state, and the sewage flux of the membrane filtration process is reduced and adjusted according to the abnormal fluctuation duration or the proportion of the key area; The reduction value of the sewage flux is positively correlated with the duration of abnormal fluctuation; The reduction value of the sewage flux is positively correlated with the proportion of the key area.

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