Electrochemical confinement catalytic treatment system and method for soluble organic matters

Abstract

The invention discloses a dissolved organic matter electrochemical confinement catalytic treatment system and method, and belongs to the technical field of water treatment. The treatment system comprises an electrochemical reactor, an electro-catalysis electrode is arranged in the electrochemical reactor, and the electro-catalysis electrode is connected with a power supply; the electro-catalysis electrode comprises an anode and a cathode; a finite field catalytic material is arranged between the anode and the cathode; a micro-flow gas distribution channel is arranged at the bottom of the electrochemical reactor and is connected with a gas source; the electrochemical reactor is connected with a water inlet pipeline and a water outlet pipeline. The electrochemical confinement catalytic treatment system for the dissolved organic matter wastewater has the characteristics of high efficiency, economy and environmental protection, and provides a new thought and solution for solving the problems in the current wastewater treatment field. Due to the unique design concept and operation mechanism, the treatment efficiency is improved, the operation cost and the environmental influence are reduced, and wide application prospects and market potential are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and relates to a system and method for electrochemical confined catalytic treatment of soluble organic matter. Background Art

[0002] Dissolved organic matter (DOM) is the main component of aqueous organic matter. It is widespread and complex, including various organic acids, alcohols, aldehydes, ketones, esters, and aromatic hydrocarbons. The accumulation of these organic matter in water bodies will not only reduce water quality and affect the survival and reproduction of aquatic organisms, but may also be transmitted through the food chain, posing a potential threat to human health. Therefore, the effective removal of DOM in wastewater is of great significance for protecting water resources, maintaining ecological balance, and ensuring the sustainable use of water resources.

[0003] However, existing DOM removal technologies face many challenges. Although traditional physical adsorption methods, such as activated carbon adsorption, can remove some DOM, the regeneration process of the adsorbent is complex and energy-intensive, which limits its promotion in practical applications. Chemical oxidation methods, such as ozone oxidation and Fenton reagent oxidation, can efficiently decompose DOM, but usually require the consumption of a large amount of chemical reagents, which not only increases the treatment cost, but may also introduce new pollutants, such as residual ozone and iron ions in Fenton reagent, causing secondary pollution to the environment. In addition, when treating DOM, biological treatment methods are limited by microbial growth conditions, such as temperature, pH value, nutrients, etc., and the treatment efficiency is relatively low. In addition, for some difficult-to-degrade DOM, such as polycyclic aromatic hydrocarbons, the effect is not good. Summary of the invention

[0004] The purpose of the present invention is to solve the technical problem that the DOM removal technology in the prior art has a poor effect, and to provide a system and method for electrochemical confined catalytic treatment of soluble organic matter.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention provides an electrochemical confined catalytic treatment system for soluble organic matter, comprising an electrochemical reactor, wherein an electrocatalytic electrode is arranged in the electrochemical reactor, and the electrocatalytic electrode is connected to a power supply; the electrocatalytic electrode comprises an anode and a cathode; a confined catalytic material is arranged between the anode and the cathode; a microflow gas distribution channel is arranged at the bottom of the electrochemical reactor, and the microflow gas distribution channel is connected to a gas source; the electrochemical reactor is connected to a water inlet pipe and a water outlet pipe.

[0006] Further improvements are: The water inlet pipeline is provided with a water inlet COD detector, a water inlet flow meter and a water volume control valve.

[0007] An exhaust valve is arranged on the water outlet pipe.

[0008] The confined catalytic material is arranged in the gauze.

[0009] It comprises a plurality of electrochemical reactors connected in parallel; the microflow gas distribution channel of each electrochemical reactor is connected to the same gas source.

[0010] The anode is a corrosion-resistant electrode; the cathode is an oxygen-evolving electrode.

[0011] The anode is a Ti-based electrode.

[0012] The power supply is a DC power supply; the voltage range of the DC power supply is 0~30V.

[0013] A flow regulating valve is provided between the gas source and the microfluidic gas distribution channel; the flow regulating range of the microfluidic gas distribution channel is 0-5 L / min; the bubble size generated by the microfluidic gas distribution channel is less than 100 μm.

[0014] In a first aspect, the present invention provides a method for electrochemical confined catalytic treatment of soluble organic wastewater based on the above system, comprising: Step 1: When the dissolved organic wastewater enters the water inlet pipe, the water inlet COD detector measures the water quality COD of the dissolved organic wastewater to obtain the COD content of the dissolved organic wastewater, and calculates the reasonable inlet flow rate of the dissolved organic wastewater, which is specifically calculated by the following formula: Q=m / M Wherein, Q represents the reasonable inlet flow rate of dissolved organic wastewater, L / h; m represents the COD value removed per unit time by the electrochemical reactor, mg / h; M represents the COD content of dissolved organic wastewater, mg / L; Step 2, adjusting the flow rate through a water flow control valve based on the reasonable inflow flow rate of the soluble organic matter wastewater; Step three, when the dissolved organic wastewater enters the electrochemical reactor, turn on the power supply and gas source to perform electrochemical confined catalytic treatment on the dissolved organic wastewater.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a soluble organic electrochemical confined catalytic treatment system. Through the setting of electrocatalytic electrodes, especially the confined catalytic materials cleverly arranged between the anode and the cathode, the system can efficiently utilize the synergistic effect of adsorption and electrochemical oxidation in a fluidized state. This innovation greatly accelerates the removal process of organic molecules, so that the treatment efficiency is significantly improved. At the same time, the application of confined catalytic materials also effectively maintains the high adsorption capacity of the adsorbent, prolongs the service life of the adsorbent, thereby reducing the replacement frequency and cost. In addition, the gas fluidization technology used in the electrochemical reactor not only optimizes the solid-liquid mixing characteristics, but also significantly improves the mass transfer rate. This improvement makes the contact between organic molecules and electrodes and catalytic materials more sufficient, accelerates the reaction process, and thus improves the treatment efficiency. At the same time, gas fluidization also helps to reduce chemical consumption and reduce the risk of environmental pollution during the treatment process, which is in line with the concept of green and sustainable development. In summary, the soluble organic electrochemical confined catalytic treatment system, with its high efficiency, economy and environmental protection, provides new ideas and solutions for solving the current problems faced in the field of wastewater treatment. Its unique design concept and operating mechanism not only improves processing efficiency, but also reduces operating costs and environmental impact. It has broad application prospects and market potential.

[0016] Furthermore, an inlet COD detector, an inlet flow meter and a water volume control valve were added to the inlet pipe. First, the introduction of the inlet COD detector enables the system to monitor the concentration of dissolved organic matter (expressed as chemical oxygen demand COD) in the wastewater entering the electrochemical reactor in real time. This function is crucial for accurate control of the treatment process because it can automatically adjust the treatment parameters, such as current intensity and gas flow, according to the actual degree of pollution of the wastewater, to ensure that the treatment effect is optimal. At the same time, real-time monitoring also provides a feedback mechanism for the system, which helps to promptly discover and correct possible operating problems and improve the stability and reliability of the overall treatment. Secondly, the setting of the inlet flow meter enables the system to accurately measure the amount of wastewater entering the reactor. This information is crucial for optimizing the treatment process and improving the treatment efficiency. By accurately controlling the amount of wastewater, the system can ensure that the catalytic materials are fully utilized and avoid waste of resources during the treatment process. At the same time, the flow data can also be used to evaluate the system's treatment capacity, providing an important reference for future expansion or upgrading. Finally, the addition of the water volume control valve enables the system to automatically adjust the entry rate of wastewater according to the inlet flow and COD concentration. This function not only helps to maintain stable operating conditions in the reactor, but also effectively prevents poor treatment effects or waste of resources caused by excessive or insufficient wastewater flow. By precisely controlling the inlet rate of wastewater, the system can ensure that the catalytic reaction is carried out under optimal conditions, thereby improving treatment efficiency and resource utilization. In summary, by adding an inlet COD detector, an inlet flow meter and a water volume control valve to the inlet pipe, the electrochemical confined catalytic treatment system for dissolved organic matter realizes real-time monitoring and precise control of the wastewater treatment process. This design not only improves treatment efficiency and resource utilization, but also enhances the stability and reliability of the system, bringing new technological breakthroughs and application prospects to the field of wastewater treatment.

[0017] Furthermore, the parallel configuration of electrochemical reactors significantly improves the system's processing capacity. By increasing the number of reactors, the system can process a larger flow of wastewater to meet larger or higher-demand wastewater treatment needs. This modular design makes the system scalable and flexible, and the processing capacity can be easily adjusted according to actual needs, avoiding the problem of inefficient or incomplete processing due to insufficient processing capacity. Secondly, each electrochemical reactor is connected to the same gas source, realizing unified management and distribution of the gas source. This design not only simplifies the structure of the system and reduces maintenance costs, but also ensures that each reactor can obtain a stable and appropriate supply of gas. Stable gas fluidization helps to maintain a good mixing state in the reactor, improve mass transfer rate and reaction efficiency, and further improve the treatment effect. Electrochemical reactors configured in parallel can also achieve load balancing and improve the stability and durability of the system. During the treatment process, the wastewater can be evenly distributed to each reactor, avoiding the risk of damage to a single reactor due to overload. This load balancing mechanism helps to extend the service life of the system, reduce maintenance costs, and improve overall economic benefits. In summary, by adopting several parallel electrochemical reactors and connecting the microflow gas distribution channel of each reactor to the same gas source, the electrochemical confined catalytic treatment system for soluble organic matter achieves multiple beneficial effects such as a significant improvement in processing capacity, simplified structure, unified gas source management, and load balancing.

[0018] The present invention discloses a method for electrochemical confined catalytic treatment of soluble organic matter. First, the method realizes real-time monitoring of the water quality of soluble organic wastewater by introducing an inlet COD detector. By accurately measuring the COD content of the wastewater and combining the removal capacity per unit time of the electrochemical reactor, a reasonable wastewater inlet flow rate can be calculated. This step ensures the high efficiency of the wastewater treatment process. Secondly, based on the calculated reasonable inlet flow rate, the method accurately adjusts the wastewater flow rate through a water volume control valve. This step not only helps to maintain stable operating conditions in the reactor, but also ensures that the catalytic material is fully utilized and improves the treatment efficiency. At the same time, by accurately controlling the wastewater flow rate, the energy consumption and the amount of chemical reagents used in the treatment process can also be effectively reduced, reducing operating costs and environmental impacts. Furthermore, the method makes full use of the advantages of electrochemical confined catalytic treatment technology. In the electrochemical reactor, by applying voltage and introducing gas fluidization, efficient removal of soluble organic matter can be achieved. The application of confined catalytic materials further improves the reaction rate and selectivity, making the treatment process more efficient and environmentally friendly. At the same time, the electrochemical regeneration mechanism enables the catalytic material to be continuously regenerated during use, prolonging its service life and reducing the frequency and cost of replacement. Finally, the method also embodies the characteristics of intelligence and automation. By integrating intelligent equipment such as the inlet COD detector and the water volume control valve, real-time monitoring and precise control of the wastewater treatment process can be achieved. This intelligent control not only improves the treatment efficiency, but also reduces the need for manual intervention, making the system more stable and reliable. In summary, the electrochemical confined catalytic treatment method for dissolved organic wastewater achieves efficient and environmentally friendly treatment of dissolved organic wastewater by real-time monitoring of water quality, precise flow adjustment, efficient use of electrochemical confined catalytic technology, and intelligent control. This method not only improves the treatment efficiency and quality, but also reduces operating costs and environmental impacts, and has broad application prospects and market potential. And stability, avoiding the problem of poor treatment effect or waste of resources caused by excessive or small wastewater flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 It is a schematic diagram of a system for electrochemical confined catalytic treatment of soluble organic matter in the present invention.

[0021] Among them: 1-inlet COD monitor; 2-inlet flow meter; 3-water volume control valve; 4-electrochemical reactor; 5-electrocatalytic electrode; 6-power supply; 7-confined catalytic material; 8-microflow air distribution channel; 9-gauze; 10-exhaust valve; 11-air source; 12-water inlet; 13-water outlet. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0025] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0026] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings: Example 1 See also Figure 1The embodiment of the present invention discloses an electrochemical confined catalytic treatment system for soluble organic matter, including an electrochemical reactor 4, in which an electrocatalytic electrode 5 is arranged, and the electrocatalytic electrode 5 is connected to a power supply 6; the electrocatalytic electrode 5 includes an anode and a cathode; a confined catalytic material 7 is arranged between the anode and the cathode, and the confined catalytic material 7 is arranged in a gauze 9, and the confined catalytic material 7 has conductive adsorption properties, and the pore size of the gauze 9 is smaller than the particle size of the confined catalytic material 7; a microflow air distribution channel 8 is arranged at the bottom of the electrochemical reactor 4, and the microflow air distribution channel 8 is connected to a gas source 11; the electrochemical reactor 4 is connected to a water inlet pipe and a water outlet pipe. The water inlet pipeline is provided with a water inlet COD detector 1, a water inlet flow meter 2 and a water volume control valve 3. The water inlet pipeline is additionally provided with a water inlet COD detector, a water inlet flow meter and a water volume control valve. Firstly, the introduction of the water inlet COD detector enables the system to monitor the concentration of dissolved organic matter (expressed as chemical oxygen demand COD) in the wastewater entering the electrochemical reactor in real time. This function is essential for the precise control of the treatment process, because it can automatically adjust the treatment parameters, such as current intensity, gas flow, etc., according to the actual degree of pollution of the wastewater, so as to ensure that the treatment effect reaches the best state. At the same time, real-time monitoring also provides a feedback mechanism for the system, which helps to timely discover and correct possible operating problems and improve the stability and reliability of the overall treatment. Secondly, the setting of the water inlet flow meter enables the system to accurately measure the amount of wastewater entering the reactor. This information is essential for optimizing the treatment process and improving the treatment efficiency. By accurately controlling the amount of wastewater, the system can ensure that the catalytic materials are fully utilized and avoid waste of resources in the treatment process. At the same time, the flow data can also be used to evaluate the treatment capacity of the system. force, providing an important reference for future expansion or upgrading. Finally, the addition of the water control valve enables the system to automatically adjust the wastewater entry rate according to the inlet flow rate and COD concentration. This function not only helps to maintain stable operating conditions in the reactor, but also effectively prevents poor treatment effects or waste of resources caused by excessive or too small wastewater flow. By accurately controlling the entry rate of wastewater, the system can ensure that the catalytic reaction is carried out under optimal conditions, thereby improving treatment efficiency and resource utilization. In summary, by adding an inlet COD detector, an inlet flow meter and a water control valve to the inlet pipeline, the electrochemical confined catalytic treatment system for dissolved organic matter realizes real-time monitoring and precise control of the wastewater treatment process. This design not only improves the treatment efficiency and resource utilization, but also enhances the stability and reliability of the system, bringing new technological breakthroughs and application prospects to the field of wastewater treatment. An exhaust valve 10 is provided on the outlet pipeline. The anode adopts a corrosion-resistant electrode; the cathode adopts an oxygen evolution electrode. The power supply 6 is a DC power supply; the voltage range of the DC power supply is 0~30 V.A flow regulating valve is provided between the gas source 11 and the microflow gas distribution channel 8; the flow regulating range of the microflow gas distribution channel 8 is 0-5 L / min; the size of the bubbles generated by the microflow gas distribution channel 8 is less than 100 μm.

[0029] The present invention discloses a soluble organic electrochemical confined catalytic treatment system. Through the setting of electrocatalytic electrodes, especially the confined catalytic materials cleverly arranged between the anode and the cathode, the system can efficiently utilize the synergistic effect of adsorption and electrochemical oxidation in a fluidized state. This innovation greatly accelerates the removal process of organic molecules, so that the treatment efficiency is significantly improved. At the same time, the application of confined catalytic materials also effectively maintains the high adsorption capacity of the adsorbent, prolongs the service life of the adsorbent, thereby reducing the replacement frequency and cost. In addition, the gas fluidization technology used in the electrochemical reactor not only optimizes the solid-liquid mixing characteristics, but also significantly improves the mass transfer rate. This improvement makes the contact between organic molecules and electrodes and catalytic materials more sufficient, accelerates the reaction process, and thus improves the treatment efficiency. At the same time, gas fluidization also helps to reduce chemical consumption and reduce the risk of environmental pollution during the treatment process, which is in line with the concept of green and sustainable development. In summary, the soluble organic electrochemical confined catalytic treatment system, with its high efficiency, economy and environmental protection, provides new ideas and solutions for solving the current problems faced in the field of wastewater treatment. Its unique design concept and operation mechanism not only improve the treatment efficiency, but also reduce the operating cost and environmental impact, and has broad application prospects and market potential. This technology can quickly remove dissolved organic molecules in water under the synergistic effect of adsorption and electrochemical oxidation in a fluidized state, and maintain a high adsorption capacity of the adsorbent. Through electrochemical regeneration, the operating cost is low and the operation is simple. The use of gas fluidization in the electrochemical reactor has better solid-liquid mixing characteristics, and higher mass transfer rates and less chemical consumption can improve performance.

[0030] Example 2 The difference between this embodiment and embodiment 1 is that this embodiment discloses a soluble organic matter electrochemical confined catalytic treatment system comprising a plurality of electrochemical reactors (4) connected in parallel; the microflow gas distribution channel 8 of each electrochemical reactor 4 is connected to the same gas source 11. For example, two electrochemical reactors 4 are connected in parallel; and the anode is a Ti-based electrode.

[0031] The parallel configuration of electrochemical reactors significantly improves the system's processing capacity. By increasing the number of reactors, the system can process a larger flow of wastewater to meet larger or higher-demand wastewater treatment needs. This modular design makes the system scalable and flexible, and the processing capacity can be easily adjusted according to actual needs, avoiding the problem of inefficient or incomplete processing due to insufficient processing capacity. Secondly, each electrochemical reactor is connected to the same gas source, realizing unified management and distribution of the gas source. This design not only simplifies the structure of the system and reduces maintenance costs, but also ensures that each reactor can obtain a stable and appropriate supply of gas. Stable gas fluidization helps to maintain a good mixing state in the reactor, improve mass transfer rate and reaction efficiency, and further improve the treatment effect. Electrochemical reactors configured in parallel can also achieve load balancing and improve the stability and durability of the system. During the treatment process, the wastewater can be evenly distributed to each reactor, avoiding the risk of damage to a single reactor due to overload. This load balancing mechanism helps to extend the service life of the system, reduce maintenance costs, and improve overall economic benefits. In summary, by adopting several parallel electrochemical reactors and connecting the microflow gas distribution channel of each reactor to the same gas source, the electrochemical confined catalytic treatment system for soluble organic matter achieves multiple beneficial effects such as a significant improvement in processing capacity, simplified structure, unified gas source management, and load balancing.

[0032] The present invention also discloses a method for electrochemical confined catalytic treatment of soluble organic wastewater, comprising: Step 1: When the dissolved organic wastewater enters the water inlet pipe, the water inlet COD detector 1 measures the water quality COD of the dissolved organic wastewater to obtain the COD content of the dissolved organic wastewater, and calculates the reasonable inlet flow rate of the dissolved organic wastewater, which is specifically calculated by the following formula: Q=m / M Wherein, Q represents the reasonable inlet flow rate of the dissolved organic wastewater, L / h; m represents the COD value removed per unit time by the electrochemical reactor 4, mg / h; M represents the COD content of the dissolved organic wastewater, mg / L; Step 2, adjusting the flow rate through the water control valve 3 based on the reasonable inflow flow rate of the soluble organic matter wastewater; Step three, after the dissolved organic wastewater enters the electrochemical reactor 4, the power source 6 and the gas source 11 are turned on to perform electrochemical confined catalytic treatment on the dissolved organic wastewater.

[0033] The present invention discloses a method for treating soluble organic wastewater by electrochemical confined catalysis. First, the method realizes real-time monitoring of the water quality of soluble organic wastewater by introducing an inlet COD detector. By accurately measuring the COD content of the wastewater and combining the removal capacity per unit time of the electrochemical reactor, a reasonable wastewater inlet flow rate can be calculated. This step ensures the high efficiency of the wastewater treatment process. Secondly, based on the calculated reasonable inlet flow rate, the method accurately adjusts the wastewater flow rate through a water volume control valve. This step not only helps to maintain stable operating conditions in the reactor, but also ensures that the catalytic material is fully utilized and improves the treatment efficiency. At the same time, by accurately controlling the wastewater flow rate, the energy consumption and the amount of chemical reagents used in the treatment process can also be effectively reduced, reducing the operating cost and environmental impact. Furthermore, the method makes full use of the advantages of electrochemical confined catalytic treatment technology. In the electrochemical reactor, by applying voltage and introducing gas fluidization, efficient removal of soluble organic matter can be achieved. The application of confined catalytic materials further improves the reaction rate and selectivity, making the treatment process more efficient and environmentally friendly. At the same time, the electrochemical regeneration mechanism enables the catalytic material to be continuously regenerated during use, prolonging its service life and reducing the frequency and cost of replacement. Finally, the method also embodies the characteristics of intelligence and automation. By integrating intelligent equipment such as the inlet COD detector and the water volume control valve, real-time monitoring and precise control of the wastewater treatment process can be achieved. This intelligent control not only improves the treatment efficiency, but also reduces the need for manual intervention, making the system more stable and reliable. In summary, the electrochemical confined catalytic treatment method for dissolved organic wastewater achieves efficient and environmentally friendly treatment of dissolved organic wastewater by real-time monitoring of water quality, precise flow adjustment, efficient use of electrochemical confined catalytic technology, and intelligent control. This method not only improves the treatment efficiency and quality, but also reduces operating costs and environmental impacts, and has broad application prospects and market potential. And stability, avoiding the problem of poor treatment effect or waste of resources caused by excessive or small wastewater flow.

[0034] The working principle of the present invention is as follows: In the electrochemical reactor, the confined catalytic material first enters the fluidized state due to the agitation of the air. At the same time, a large number of particle electrodes with anode and cathode ends are formed due to the polarization effect of the electric field. On the one hand, the particle electrode significantly increases the electrochemical reaction area and mass transfer rate in the system, increasing the direct electrochemical oxidation and the generation of H2O2. On the other hand, due to the in-situ generation of H2O2 by electroreduction at the cathode, the confined catalytic material catalyzes H2O2 to generate OH through a Fenton-like reaction, which enhances the indirect electrochemical oxidation mediated by OH. At the same time, the adsorption effect can accelerate the oxidative degradation of the concentration of dissolved organic matter at the active site of the particle electrode by increasing the concentration of dissolved organic matter at the interface of the confined catalytic material, and realize the electrochemical regeneration of the confined catalytic material. Therefore, the confined catalytic material has the triple role of adsorbent, particle electrode and catalyst, and the combination of direct electrochemical oxidation, OH oxidation and adsorption realizes the efficient removal of dissolved organic molecules.

[0035] The above are only preferred embodiments of the present invention and are 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 system for electrochemical confined catalytic treatment of soluble organic matter, characterized in that: The invention comprises an electrochemical reactor (4), wherein an electrocatalytic electrode (5) is arranged in the electrochemical reactor (4), and the electrocatalytic electrode (5) is connected to a power source (6); the electrocatalytic electrode (5) comprises an anode and a cathode; a finite domain catalytic material (7) is arranged between the anode and the cathode; a microflow gas distribution channel (8) is arranged at the bottom of the electrochemical reactor (4), and the microflow gas distribution channel (8) is connected to a gas source (11); and the electrochemical reactor (4) is connected to a water inlet pipe and a water outlet pipe.

2. The electrochemical confined catalytic treatment system for soluble organic matter according to claim 1 is characterized in that: The water inlet pipeline is provided with a water inlet COD detector (1), a water inlet flow meter (2) and a water volume control valve (3).

3. The electrochemical confined catalytic treatment system for soluble organic matter according to claim 1 is characterized in that: An exhaust valve (10) is provided on the water outlet pipe.

4. The electrochemical confined catalytic treatment system for soluble organic matter according to claim 1 is characterized in that: The confined catalytic material (7) is arranged in the gauze (9).

5. The electrochemical confined catalytic treatment system for soluble organic matter according to claim 1 is characterized in that: It comprises a plurality of electrochemical reactors (4) connected in parallel; the microflow gas distribution channel (8) of each of the electrochemical reactors (4) is connected to the same gas source (11).

6. The electrochemical confined catalytic treatment system for soluble organic matter according to claim 1, characterized in that: The anode is a corrosion-resistant electrode; the cathode is an oxygen-evolving electrode.

7. The electrochemical confined catalytic treatment system for soluble organic matter according to claim 6, characterized in that: The anode is a Ti-based electrode.

8. The electrochemical confined catalytic treatment system for soluble organic matter according to claim 1, characterized in that: The power supply (6) is a direct current power supply; the voltage range of the direct current power supply is 0-30 V.

9. The electrochemical confined catalytic treatment system for soluble organic matter according to claim 1, characterized in that: A flow regulating valve is provided between the gas source (11) and the microfluidic gas distribution channel (8); the flow regulating range of the microfluidic gas distribution channel (8) is 0-5 L / min; and the size of bubbles generated by the microfluidic gas distribution channel (8) is less than 100 μm.

10. A method for electrochemical confined catalytic treatment of dissolved organic matter based on the system according to any one of claims 2 to 9, characterized in that: include: Step 1: When the dissolved organic wastewater enters the water inlet pipe, the water inlet COD detector (1) measures the water quality COD of the dissolved organic wastewater to obtain the COD content of the dissolved organic wastewater, and calculates the reasonable inlet flow rate of the dissolved organic wastewater, which is specifically calculated by the following formula: Q=m / M Wherein, Q represents the reasonable inlet flow rate of the dissolved organic matter wastewater, L / h; m represents the COD value removed per unit time by the electrochemical reactor (4), mg / h; M represents the COD content of the dissolved organic matter wastewater, mg / L; Step 2, adjusting the flow rate through a water flow control valve (3) based on the reasonable inflow flow rate of the soluble organic matter wastewater; Step three, after the dissolved organic wastewater enters the electrochemical reactor (4), the power source (6) and the gas source (11) are turned on to perform electrochemical confined catalytic treatment on the dissolved organic wastewater.

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