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Method of automatic control of ion-exchange sorption of amino acids from waste water

Method of automatic control of ion-exchange sorption of amino acids from waste water
IPC classes for russian patent Method of automatic control of ion-exchange sorption of amino acids from waste water (RU 2379107):
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Method of automatic control of ion-exchange sorption of amino acids from waste water Method of automatic control of ion-exchange sorption of amino acids from waste water / 2379107
Invention relates to a method of automatic control of ion-exchange sorption of amino acids from waste water and can be used in chemical, food and other industries. The method of automatic control of ion-exchange sorption of amino acids from waste water involves controlling concentration of components of waste water, measuring flow of liquid solutions and their level in reservoirs. Information on flow of the process of ion-exchange sorption of amino acids from waste water is sent to sensors for monitoring level in containers of incoming water, distillate and desorbing solution, acidity of incoming water and during its flow into ion-exchange columns, temperature of the distillate and desorbing solution, concentration of the target component in the incoming water and water at the outlet of the ion-exchange columns and flow through secondary devices, a microprocessor and digital-to-analogue converters to actuating mechanisms for changing parametres of operation of the equipment depending on selected criteria.
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Process for automatic control of sugar clarification and automatic control system for performing the same Process for automatic control of sugar clarification and automatic control system for performing the same / 2267149
Method for automatic control of clarification of sugar by means of sugar-containing solution in successively joined auger and horizontal sectional clarifying agitator at supplying sugar to auger comprises steps of controlling flow rate of sugar-containing solution to clarifying agitator depending upon concentration of dry matters in clarified product; supplying to auger catholyte with pH 10 - 11.5 and feeding to first section of clarifying agitator milk of lime; controlling flow rate of catholyte in such a way that in those section of clarifying agitator where clarifying process is going on for 4 - 6 min concentration of dry matters is in range 12 -18% and controlling flow rate of milk of lime in such a way that pH in the same section is in range 10.8 - 11.5; supplying sugar- containing solution to next sections of clarifying agitator along motion direction of sugar in it; measuring concentration of dry matters in order to control flow rate of sugar-containing solution in last section of clarifying agitator. Automatic control system for controlling clarification of sugar in successively joined auger and horizontal sectional agitator includes circuit for stabilizing concentration of dry matters of clarified product with use of pickup for measuring concentration of dry matters. Auger is provided with branch pipes for feeding catholyte into it. Clarifying agitator includes branch pipe for feeding lime of milk to first section. Pickup for measuring concentration of dry matters is arranged in last section of clarifying agitator. System includes in addition circuit for controlling quality of clarification having pickups for measuring pH and concentration of dry matters, both placed in one section of clarifying agitator and pickup for measuring catholyte flow rate; regulators and valves. One valve is mounted inline for feeding milk of lime and other valve is mounted inline for feeding catholyte.

FIELD: chemistry.

SUBSTANCE: invention relates to a method of automatic control of ion-exchange sorption of amino acids from waste water and can be used in chemical, food and other industries. The method of automatic control of ion-exchange sorption of amino acids from waste water involves controlling concentration of components of waste water, measuring flow of liquid solutions and their level in reservoirs. Information on flow of the process of ion-exchange sorption of amino acids from waste water is sent to sensors for monitoring level in containers of incoming water, distillate and desorbing solution, acidity of incoming water and during its flow into ion-exchange columns, temperature of the distillate and desorbing solution, concentration of the target component in the incoming water and water at the outlet of the ion-exchange columns and flow through secondary devices, a microprocessor and digital-to-analogue converters to actuating mechanisms for changing parametres of operation of the equipment depending on selected criteria.

EFFECT: invention increases accuracy of control and minimises energy and material costs.

1 dwg

 

The present invention relates to methods and systems for automatic process control of ion exchange sorption of target components from the wastewater and can be used in chemical, food and other industries.

A known method for automatic control and regulation of the content of surfactants in aqueous process solutions [an Application for a patent of the Russian Federation 2000127702, CL. G01N 33/18, 35/00, Publ. 01.27.2003], including the control and regulation of the content of surfactants in aqueous solution cleanser.

The disadvantage of this method is the lack of automatic control methods target component that does not provide operational regulatory process.

The known method for automatic process control of wastewater treatment in the device [RF Patent 94015544, MKI C02F 3/02, Appl. 27.04.1994, publ. 10.04.1996,] including control of concentrations of ingredients wastewater flow measurement of liquid solutions and their level in the tanks.

The disadvantage of this method is the low precision, since it does not provide control of the target component in the wastewater inlet and the exhaust regenerating solution.

The closest in technical essence and the achieved effect to the present invention is a method of controlling inoome the major water purification installation [A.S. 1389838, MKI B01J 47/02, Appl. 12.06.1986, publ. in B. I., 1988, No. 15], including the control and regulation of the flow of regeneration solution and the treated water.

The disadvantage of this method is the low precision, since it does not provide control of all operating parameters of the equipment and their changes depending on the selected criteria.

An object of the invention is to improve the accuracy of the control and regulation of the operating parameters of the equipment depending on the selected criteria.

The technical object of the invention is achieved by a method for automatic process control of ion exchange sorption of amino acids from wastewater, including the control of concentrations of ingredients wastewater flow measurement of liquid solutions and their level in the tanks, what's new is that advanced in the automatic mode in the source water measure the acidity level and maintain it at the required level, the source water is fed into the first ion-exchange column filled with sulfonic cation exchanger, and produce control over its consumption, which adjust to the optimum filtration rate in the first ion-exchange column and when reaching the residual concentration of the target component in the form of amino acids, the corresponding point "breakthrough", make the inclusion of a slave is that the second ion-exchange column, filled with sulfonic cation exchanger, by direction of the flow of treated water from the first ion exchange columns in the second ion-exchange column with simultaneous filtration of treated water through the first and second columns, thus provide measurements of the concentration of the target component in the form of amino acids at the output of the first and second columns and achieve the concentration of the target component in the form of amino acids at the output of the first column equal to the concentration at the inlet in the first column, switch it on regeneration, which includes stages of displacement acidic wastewater and desorption, and when you reach the result of filtering the waste water through the second column the residual concentration of the target component in the form of amino acids, the corresponding point "breakthrough", make the inclusion of the third ion exchange columns filled with sulfonic cation exchanger, by direction of the flow of treated water from the second ion exchange column in the third column with simultaneous filtration of treated water through the second and third columns, and the displacement of acidic wastewater remaining in each of the three columns after sorption, carried out by feeding them in preheated distillate in the direction opposite to the direction of flow of water by sorption, and the output of each of the three columns measure kislotno the ü distillate, level which is judged about the end of phase displacement and the early stage of desorption, which is carried out by filtering the pre-heated Stripping solution through the layer of sulfonic cation exchanger in each of the three columns with monitoring and controlling the flow desorbing solution to the optimal filtration rate during desorption, and after passing through the Stripping solution through each of three ion exchange columns, select it in the form of acidic concentrated eluate and stop stage desorption upon reaching the initial values of acidity Stripping solution, and after the first regeneration column and displacing the Stripping solution of the distillate, it is included in the work for the implementation of the sorption in the second column on the stage of recovery and the achievement of in the treated water during the filtration process in the third column of the residual concentration of the target component in the form of amino acids corresponding to the point "breakthrough", and the information about the course of the process of ion exchange sorption of amino acids from wastewater is transferred from the sensors to the control level in the source water tanks, distillate and Stripping solution, the pH of the source water and the flow in the ion exchange column, the temperature of the distillate and Stripping solution, the concentration of the target komponentov the source water and the water at the outlet of ionoobmennyh columns and flow through the secondary devices, in microprocessor and digital to analog converters of the actuators to change the operating parameters of the equipment depending on the selected criteria.

The technical result is to increase the accuracy of the control and regulation of the operating parameters of the equipment depending on the selected criteria.

The drawing shows the diagram of a method for automatic process control of ion exchange sorption of amino acids from wastewater.

The diagram of a method for automatic process control of ion exchange sorption of amino acids from waste water include ion exchange columns (adsorbers) vertical type 1, 2, 3, the capacity of the water source 4, tanks for distillate 5 and regenerating solution 6 with heating elements respectively 7 and 8, control valves 9-26.

The diagram of a method for automatic process control of ion exchange sorption of amino acids from wastewater also includes a line 27 to the filing of the original water in the ion exchange column 1, line 28 supply of treated water in the ion exchange column 2, line 29 supply of treated water in the ion exchange column 3, line 30 removal waste water, line 31, 32, 33 supply of distillate in ion-exchange columns 1, 2 and 3, line 34 removal of distillate from the ion exchange columns 1, 2 and 3, lines 35, 36, 37 feed regenerating solution, respectively in ion to the h-1, 2 and 3, line 38 of the spent regenerating solution from the ion exchange columns 1, 2 and 3, lines 39, 40, 41 feed partially processed water from the ion exchange column 1 in the ion exchange column 2, of the ion exchange columns 2 ion exchange column 3 from the ion exchange columns 3 in the ion exchange column 1, level sensors 42, 43, 44, respectively, in the source water tanks 4, distillate 5 and regenerating solution 6, the sensors acidity 45-51, respectively in the source water when it is fed through the ion exchange columns 1, 2 and 3, in the distillate, removed from the ion exchange columns 1, 2 and 3, the spent regenerating solution from the ion exchange columns 1, 2 and 3, the temperature sensors 52, 53, respectively, of the distillate in the tank 5 and regenerating solution in the vessel 6, the sensors, the concentration of the target component 54-57, respectively, in the source water and treated water at the outlet of the ion exchange columns 1, 2, 3, sensors 58-72 flow, secondary devices 73-100, the microprocessor 101, the digital-analog converters 102-121, actuators 122-141.

Method for automatic process control of ion exchange sorption of amino acids from wastewater is as follows.

Wastewater containing in its composition of the target component in the form of amino acids (for example, 20 g/l methionine), various salts (for example, 200 g/l of sodium sulfate) and other components, adultsa in the capacity of 4, in which the transmission of the correction signal from the microprocessor 101 to the Executive mechanism 130 regulating valve 9 is supported by a valid source water controlled by the sensor 42. Also in the tank 4 is controlled by a sensor 45 and is supported by adding the appropriate reagents (acids) necessary level of acidity (e.g., pH 1÷2).

From the tank 4 through line 27 source water transmission correction signal from the microprocessor 101 to the Executive mechanism 129 regulating valve 15 is fed to the ion exchange column 1 filled with sulfonic cation exchanger, with the highest selectivity, kinetic permeability and dynamic activity in relation to the target component in the form of amino acids (for example, a cation exchanger KU-5 polycondensation type, which has at sorption from aqueous salt solutions industrial wastewater highest selectivity towards methionine).

While using flow sensors 58 and 60, respectively, at the outlet from the tank 4 and in line 27 is a control flow of the source water, which is regulated by the transfer of the correction signal from the microprocessor 101 to the Executive mechanism 129 regulating valve 15, to ensure optimal filtration rate during sorption (for example, 3000 l/h·m2 ). In ion-exchange column 1 is filtered water, but when you reach a certain residual concentration of the target component in the form of amino acids (for example, equal to the content of methionine 0.5 g/l), which corresponds to the point of "breakthrough" and is monitored by the sensor to the concentration of the target component 55 is included in the next ion exchange columns 2 through the direction of flow of the treated water from the ion exchange column 1 column 2 transfer adjustment signal from the microprocessor 101 to the Executive mechanism 125 regulating valve 19. In this case, the wastewater is filtered through two pre-connected columns 1 and 2. At the same time being measured by sensors 55 and 56 of the concentration of the target component in the form of amino acids (e.g. methionine) respectively output from columns 1 and 2. The removal of waste water thus produced on line 30 sending a corrective signal from the microprocessor 101 to the Executive mechanism 125 for switching control valve 19. Upon reaching the concentration of the target component in the form of amino acids (e.g. methionine) at the outlet of column 1 controlled by the sensor 55 is equal to the concentration at the inlet controlled by the sensor 54 (i.e., there is complete saturation in column 1), the switch to the subsequent stage when the latter is tion and desorption (i.e. on its regeneration).

To prevent contamination deformiruemogo methionine sodium sulfate displacement of acidic waste water remaining in the tube 1 after sorption by filing its distillate from the tank 5 by the transfer of the correction signal from the microprocessor 101 to the Executive mechanism 127 regulating valve 12. The distillate passes through the layer of sulfonic cation exchanger in the opposite direction during sorption and at the outlet of the ion exchange columns 1, it measures the acidity using the sensor 46, and then it is removed through line 34.

The distillate is fed to the ion exchange column 1, heated in the vessel 5 to the required temperature (for example, 70-80°C), controlled by the sensor 52 and supported on a given level of transmission of the correction signal from the microprocessor 101 to the Executive mechanism 132 of the heating element 7. In the tank 5 by the transfer of the correction signal from the microprocessor 101 to the Executive mechanism 131 of the control valve 10 is also supported by the necessary level of distillate, as measured by the sensor 43.

After exclusion from the system of distillate in the ion exchange column 1 filter deformirujuschij solution (for example, hot (t=70°C) 1% solution of caustic soda containing 25-30 g/l methionine), pre-heated in the vessel 6 by sending a corrective signal with high performance embedded is Sora 101 Executive mechanism 134 of the heating element to a specified temperature level (for example, 50-60°C). In the tank 6 is also supported by the measured sensor 44 required level Stripping solution sending a corrective signal from the microprocessor 101 to the Executive mechanism 132 regulating valve 11.

Submission of the Stripping solution in the ion exchange column 1 is the transmission from the microprocessor 101 to the Executive mechanism 128 of the control valve 18.

While using flow sensors 69, 59 and 72, respectively, at the outlet from the tank 6, the inlet and outlet of the ion exchange column 1 is the control flow of a Stripping solution, which is governed by the transfer of the correction signal from the microprocessor 101 to the Executive mechanism 128 of the control valve 18, to ensure optimal filtration rate during desorption (for example, 2500 l/h·m).

After passing the solution through ionoobmennoe column 1 he was cast in the form of acidic concentrated eluate at a given value of pH (e.g. pH 5.5-7), controlled by the sensor 49, and by transmitting the correction signal from the microprocessor 101 to the Executive mechanism 123 of the regulating valve 20 is removed in line 38, from which on cooling to room temperature, then stands crystalline target component in the form of amino acids (e.g. methionine in the amount of 75-80% of the sorbed).

In the uneasy regenerating solution is performed by transmitting correction signals from the microprocessor 101 to the Executive mechanism 127 control valve 12 for supplying to the ion exchange column 1 distillate.

At the end of the neutral displacement of the target component (e.g., methionine) pH of the eluate increases dramatically and quickly reaches the original value (for example, pH 12÷12,5). For example, while the remaining methionine desorbed in the form of methionate and together with the mother liquor, obtained by filtration of the crystalline methionine used for desorption in the next cycle. Simultaneously with the desorption is carried out regeneration of methionine (translation in sodium form). The purity of the selected crystalline methionine was characterized by the content of the main product and sodium sulfate (according to TU on methionine), as well as the data obtained by the elemental analysis of the product on the carbon, sulfur and nitrogen.

At the same time after switching of the column 1 on the regeneration raw water line 28 is supplied in the following ion-exchange column 2 and at the same time using flow sensors 58 and 64, respectively, at the outlet from the tank 4 and in line 28 is the control over its consumption, which is controlled by the actuator 126 and the valve 16.

Filtering in the ion exchange column 2 is also made to advances in water with a specific residual concentration of the target component in the form of amino acids (for example, equal to the content of methionine 0.5 g/l), which corresponds to the point of "breakthrough" and controlled using the Attica concentration of the target component 56, is the involvement of ion-exchange columns 3 through the direction of flow of the treated water from the ion exchange column 2 column 3 by means of the actuator 141 and the valve 22. Waste water, as in the first case, also filtered through two pre-connected columns 2 and 3. At the same time being measured by sensors 56 and 57 of the concentration of the target component in the form of amino acids (e.g. methionine) respectively output from columns 2 and 3. While the removal of waste water is produced on line 30 through the switching valve 22 of the actuator 141. Upon reaching the concentration of the target component in the form of amino acids (e.g. methionine) at the outlet of column 2, is equal to the concentration at the inlet (full saturation), respectively, controlled by sensors, the concentration of the target component 56 and 54, it switches to the next stage of displacement and desorption (i.e. regeneration).

The displacement of acidic waste water remaining in the tube 2 after sorption by filing it heated to the required temperature (for example, 70-80°C), controlled by the sensor 52, the distillate from the tank 5 by the transfer of the correction signal from the microprocessor 101 to the Executive mechanism 122 of the regulating valve 13. At the outlet of the ion exchange columns 2 distillate change aetsa acidity using sensor 47, and then it is removed through line 34.

After exclusion from the system of distillate in the ion exchange column 2 filter deformirujuschij solution (for example, hot (t=70°C) 1% solution of caustic soda containing 25-30 g/l methionine), pre-heated in the vessel 6 to a specified temperature level (e.g., 50÷60°C).

Submission of the Stripping solution in the ion exchange column 2 is the transmission from the microprocessor 101 to the Executive mechanism 124 regulating valve 21.

While using flow sensors 69, 63 and 71, respectively, at the outlet from the tank 6, the inlet and outlet of the ion exchange columns 2 is a control flow of a Stripping solution, which is governed by the transfer of the correction signal from the microprocessor 101 to the Executive mechanism 124 regulating valve 21, to ensure optimal filtration rate during desorption (for example, 2500 l/h·m2).

After passing the solution through ionoobmennoe column 2 he was cast in the form of acidic concentrated eluate at a given value of pH (e.g. pH 5.5÷7), controlled by a sensor 50, and by transmitting the correction signal from the microprocessor 101 to the Executive mechanism 140 control valve 23 is removed in line 38.

Stage desorption stop when reaching the acidity of the original value, then Khujand who are ousting of regenerating solution in the distillate.

The displacement of regenerating solution in the distillate carry out the transfer of the correction signals from the microprocessor 101 to the Executive mechanism 122 of the control valve 13 for submission to the ion exchange column 2 distillate.

At the same time after switching of the column 2 on the regeneration raw water line 29 is supplied in the following ion-exchange column 3 and at the same time using flow sensors 58 and 67, respectively, at the outlet from the tank 4 and in line 29 is controlled by the flow rate, which is controlled by the actuator 141 and the valve 17.

Filtering in the ion exchange column 3 is also made to advances in water with a specific residual concentration of the target component in the form of amino acids (for example, equal to the content of methionine 0.5 g/l), which corresponds to the point of "breakthrough" and controlled by means of the sensor the concentration of the target component 57, after which it re-occurs, including ion-exchange columns 1, which passed the stage of displacement and desorption (i.e. the process of regeneration).

The flow of the treated water from the ion exchange column 3 refer to the column 1 by transmitting the correction signal from the microprocessor 101 to the Executive mechanism 136 regulating valve 25. The waste water thus filtered through two connected columns 3 and 1. At the same time Khujand is realized measurement using sensors 57 and 55 of the concentration of the target component in the form of amino acids (for example, methionine) respectively output from columns 3 and 1. While the removal of waste water is produced on line 30 by transmitting the correction signal from the microprocessor 101 to the Executive mechanism 136 regulating valve 25. Upon reaching the concentration of the target component in the form of amino acids (e.g. methionine) at the outlet of column 3, is equal to the concentration at the inlet (full saturation), respectively, controlled by sensors, the concentration of the target component 57 and 54, it switches to the next stage of displacement and desorption (i.e. regeneration).

The displacement of acidic waste water remaining in the tube 3 after sorption by filing it heated to the required temperature (for example, 70-80°C), controlled by the sensor 52 distillate from the tank 5 by the transfer of the correction signal from the microprocessor 101 to the Executive mechanism 138 of the control valve 14. At the outlet of the ion exchange columns 3 in the distillate is measured acidity with the help of the sensor 48, which is then removed through line 34.

After exclusion from the system of distillate in the ion exchange column 3 filter deformirujuschij solution (for example, hot (t=60-70°C) 1% solution of caustic soda containing 25-30 g/l methionine), pre-heated in the vessel 6 to a specified temperature level (for example, 70-80°C).

Submission Stripping solution ionoobmennoi column 3 is the transmission from the microprocessor 101 to the Executive mechanism 137 regulating valve 24.

While using flow sensors 69, 66 and 68, respectively, at the outlet from the tank 6, the inlet and outlet of the ion exchange columns 3 is a control flow of a Stripping solution, which is governed by the transfer of the correction signal from the microprocessor 101 to the Executive mechanism 137 regulating valve 24, for optimum filtration rate during desorption (for example, 2500 l/h·m2).

After passing the solution through ionoobmennoe column 3 he was cast in the form of acidic concentrated eluate at a given value of pH (e.g. pH 5.5÷7), controlled by a sensor 51, and by transmitting the correction signal from the microprocessor 101 to the Executive mechanism 135 control valve 26 is removed in line 38.

Stage desorption stop when reaching the acidity of the original value, followed by the displacement of regenerating solution in the distillate.

The displacement of regenerating solution in the distillate carry out the transfer of the correction signals from the microprocessor 101 to the Executive mechanism 138 of the control valve 14 for submission to the ion exchange column 3 of distillate.

Thus, continuous scheme of ion-exchange columns 1, 2, 3 provides that when the output of the adsorber 1 concentration of methionine 0.5 g/l to him podshoev aetsa 2nd adsorber etc. In turn fully saturated ion-exchange columns are switched for the next stage of displacement and desorption, i.e. each individual adsorber operates on a closed cycle: sorption → displacement of acidic wastewater → desorption and activation of cation exchanger → the displacement of regenerating solution → sorption etc.

The information about the flow of a process of ion exchange sorption of amino acids from wastewater is transferred from the sensors through the secondary devices 73-100 in the microprocessor 101, which generates correction signals through d / a converters 102-121 the actuators 122-141 to change the operating parameters of the equipment depending on the selected criteria.

The proposed method for automatic process control of ion exchange sorption of amino acids from wastewater has advantages due to the fact that the additional measurement modes and change operating parameters of the equipment depending on the selected criteria can improve the control accuracy and to minimize energy and material costs.

Method for automatic process control of ion exchange sorption of amino acids from wastewater, including the control of concentrations of ingredients wastewater flow measurement of liquid solutions and their level in the tank, characterized in that it further in the car is aliceson mode in the source water measure the acidity level and maintain it at the required level, the source water is fed into the first ion-exchange column filled with sulfonic cation exchanger, and produce control over its consumption, which adjust to the optimum filtration rate in the first ion-exchange column, and when reaching the residual concentration of the target component in the form of amino acids corresponding to the point "breakthrough", switch on the second ion-exchange column filled with sulfonic cation exchanger, by direction of the flow of treated water from the first ion exchange columns in the second ion-exchange column with simultaneous filtration of treated water through the first and second columns, thus provide measurements of the concentration of the target component in the form of amino acids at the output of the first and second columns and when reaching the concentration of the target component in the form of amino acids at the output of the first column equal to the concentration at the inlet in the first column, switch it on regeneration, which includes stages of displacement acidic wastewater and desorption, and when you reach the result of filtering the waste water through the second column the residual concentration of the target component in the form of amino acids corresponding to the point of breakthrough, make the inclusion of the third ion exchange columns filled with sulfonic cation exchanger, by direction of the flow of treated water from the second and Normanni column in the third column with simultaneous filtration of treated water through the second and third columns, thus the displacement of acidic wastewater remaining in each of the three columns after sorption, carried out by feeding them in preheated distillate in the direction opposite to the direction of flow of water by sorption, and the output of each of the three columns measure the acidity of the distillate, which is judged on the completion of phase displacement and the early stage of desorption, which is carried out by filtering the pre-heated Stripping solution through the layer of sulfonic cation exchanger in each of the three columns with monitoring and controlling the flow of Stripping solution to the optimal filtration rate during desorption, and after passing through the Stripping solution through each of three ion exchange columns select it in the form of acidic concentrated eluate and stop stage desorption upon reaching the initial values of acidity Stripping solution, and after the first regeneration column and displacing the Stripping solution of the distillate, it is included in the work for the implementation of the sorption in the second column at the stage of regeneration and achievement in the treated water during the filtration process in the third column of the residual concentration of the target component in the form of amino acids corresponding to the point "breakthrough", and the information about the course of the process of ion exchange is the sorption of amino acids from wastewater is transferred from the sensor level control in tanks source of water, distillate and Stripping solution, the pH of the source water and the flow in the ion exchange column, the temperature of the distillate and Stripping solution, the concentration of the target component in the source water and the water at the outlet of the ion exchange columns, and flow through the secondary devices, a microprocessor and a digital-analog converters actuators to change the operating parameters of the equipment depending on the selected criteria.

 

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