CN117342658A - Fenton-like electro-catalysis coupling device for deep treatment of landfill leachate and application thereof - Google Patents
Fenton-like electro-catalysis coupling device for deep treatment of landfill leachate and application thereof Download PDFInfo
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- 244000052616 bacterial pathogen Species 0.000 claims description 4
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- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 4
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- 230000003213 activating effect Effects 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/06—Contaminated groundwater or leachate
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a Fenton-like electro-catalysis coupling device for advanced treatment of landfill leachate and application thereof, comprising a waste water storage device to be treated, a water inlet peristaltic pump and a Fenton-like electro-catalysis device which are connected in sequence; the front end and the rear end of the Fenton-like electro-catalytic device are respectively provided with a water inlet and a water outlet; one end of the water inlet is communicated with the water inlet peristaltic pump, and the other end is communicated with the water inlet compartment; one end of the water outlet is communicated with the water outlet compartment, and the other end is communicated with the waste water storage device to form a circulation passage; the Fenton-like electro-catalysis device is internally provided with two pairs of electrodes consisting of three parallel electrodes, and two reaction intervals are formed between the two pairs of electrodes; the anode and the cathode are respectively connected to the anode and the cathode of the direct current power supply device; the invention utilizes green electronics to assist in regulating and controlling cathode Fenton-like reaction based on the characteristics of the treated pollutants, is coupled with high-activity anode electrocatalytic reaction, improves electronic Faraday efficiency, and can realize double high-efficiency continuous oxidative degradation of organic pollutants, can realize high-efficiency and low-cost removal of chromaticity and COD in landfill leachate, and shows good stability.
Description
Technical Field
The invention belongs to the field of water treatment devices and methods, and particularly relates to a Fenton-like electro-catalytic coupling device for advanced treatment of landfill leachate and application thereof.
Background
With the rapid development of social economy, the living and living standards of people are increasingly improved, the generated solid waste of life is also growing, and the influence on the environment is an important factor for restricting the urban development. The garbage leachate wastewater generated after garbage landfill treatment has the characteristics of high salinity, high pollutant concentration, high chromaticity, strong toxicity and difficult biodegradation, and is difficult to completely remove by the traditional treatment process. The emission control of the landfill leachate in China is strictly implemented according to the specification of the pollution control Standard of the domestic landfill (GB 16889-2008), namely the landfill leachate can be discharged after being treated. Therefore, the realization of the advanced treatment of the landfill leachate has great practical significance.
The advanced oxidation method can effectively degrade organic matters in the landfill leachate, promote the rupture of chemical bonds in macromolecular organic matters, decompose the macromolecular organic matters into small molecular organic matters, increase the biodegradability, but has lower mineralization rate on the small molecular organic matters, high sludge yield and secondary pollution (adding of chemical reagents), and increase the water treatment cost; the electrochemical oxidation method can also be applied to landfill leachate treatment, can effectively mineralize pollutants in organic wastewater, improve the degradation and removal efficiency of the pollutants, and also can remove ammonia nitrogen and sulfur-containing pollutants through electrooxidation, has a wide application range, but also faces the problems of low electrode mass transfer efficiency, low Faraday efficiency, high energy consumption, poor stability, electrode plate scaling and the like
Therefore, it is necessary to design a green, energy-saving and efficient device and method thereof to solve the above technical problems synchronously.
Disclosure of Invention
Aiming at the technical defects of garbage leachate treatment in the prior art, the invention is based on a heterogeneous catalysis Fenton-like system and an electrocatalytic system, and aims to provide a Fenton-like-electrocatalytic coupling device for garbage leachate deep treatment and application thereof.
In order to solve the problems in the prior art, the invention adopts the following technical scheme:
a Fenton-like electro-catalytic coupling device for deep treatment of landfill leachate is disclosed, which is a Fenton-like electro-catalytic coupling device for deep treatment of landfill leachate;
the Fenton-like electro-catalysis device comprises a reaction tank and a detachable reaction tank cover arranged above the reaction tank;
the two sides of the reaction tank are respectively provided with a water inlet and a water outlet, an electrode module is arranged in the reaction tank, the electrode module consists of a first metal electrode, a second metal electrode and a DSA electrode, the second metal electrode and the DSA electrode are relatively arranged in parallel to form a first pair of electrode pairs, and the first metal electrode and the DSA electrode are relatively arranged in parallel to form a second pair of electrode pairs; the first metal electrode and the second metal electrode are cathodes, the DSA electrode is a common anode of two pairs of electrodes, the DSA electrode is connected with the positive side of the direct current power supply equipment, and the first metal electrode and the second metal electrode are connected with the negative side of the direct current power supply equipment through wires;
the reaction tank is divided into three areas by a first metal electrode and a DSA electrode, wherein the three areas are respectively a water inlet compartment, a Fenton-like-electrocatalytic coupling compartment and a water outlet compartment, the water inlet corresponds to the water inlet compartment, and the water outlet corresponds to the water outlet compartment;
a reagent feeding port is arranged on the reaction tank cover at a position corresponding to the water inlet compartment, the position of the reagent feeding port corresponds to the water inlet compartment, and reagent feeding equipment is connected outside the reagent feeding port;
the waste water storage device, the water inlet peristaltic pump and the water inlet are sequentially communicated through pipelines, and the water outlet is communicated with the waste water storage device through a pipeline to form a circulating passage of the coupling device.
As an improvement, the first metal electrode, the second metal electrode and the DSA electrode are all fixed through an electrode clamping plate; the electrode clamping plate comprises two polytetrafluoroethylene plates, and electrode lead connectors are arranged on the polytetrafluoroethylene plates, so that direct-current battery equipment can be conveniently connected.
As an improvement, the materials of the first metal electrode and the second metal electrode are cuprous oxide carriers with reticular metal copper coatings on the surfaces; the DSA electrode is made of ruthenium oxide carrier with reticular metallic titanium coating on the surface.
The method for treating the landfill leachate by using the Fenton-like electrocatalytic coupling device for the deep treatment of the landfill leachate comprises the following steps of:
step 1, after landfill leachate is treated, organic wastewater which is difficult to degrade is collected in a wastewater storage device to be treated, and is simply stood for residence, a water inlet peristaltic pump is started, the wastewater storage device to be treated enters a water inlet compartment through a water inlet, and meanwhile, an oxidant is added into a reaction tank;
step 2, wastewater enters an electric field interval; under the condition that direct-current power supply equipment is electrified, various active substances with high oxidability generated by a Fenton-like electrocatalytic coupling method oxidize and degrade pollutants and pathogenic bacteria in a water body in the flowing process of wastewater;
and 3, enabling the finished wastewater to flow into a water outlet compartment, returning to flow into a wastewater storage device, and performing the next step of cyclic degradation until the water quality reaches the discharge standard, and completing the cycle.
As an improvement, the oxidant is H 2 O 2 One or more of PMS, PDS.
As an improvement, the flow rate of the water inflow is 16-32 mL/min.
As an improvement, the addition amount of the oxidant is 10mg/L.
The beneficial effects are that:
compared with the prior art, the invention has the advantages that the landfill leachate is deepDegree-treated Fenton-like-electrocatalytic coupling device and application thereof, green electrons are provided for cathode Fenton-like system by electrochemical method, and catalyst surface M is promoted (n+1)+ /M n+ The cyclic regeneration of the catalyst is improved, the efficiency of activating the oxidant is improved, the efficient anode is coupled, the electronic Faraday efficiency is improved, and the continuous degradation of pollutants by double catalytic oxidation is realized; the electrode mass transfer efficiency is improved through the high-activity electrode material, and the energy consumption is reduced; double optimization is performed, so that the degradation and removal efficiency of pollutants is improved. The specific advantages are as follows:
(1) The self-supporting metal film in-situ loading of the high-activity catalyst is realized by using a deposition-high-temperature calcination technology, so that the problems of low recovery rate of the powder catalyst and high sludge yield in the traditional Fenton catalytic reaction are overcome;
(2) The micron-sized apertures in the meshed metal membrane are utilized to limit the water flow, so that mass transfer is enhanced, the conversion efficiency of short-service-life active species is improved, and the removal efficiency of pollutants is enhanced;
(3) Green electronic auxiliary regulation Fenton reaction and strengthening metal oxide surface M (n)+ /M (n+1)+ Recycling regeneration, relieving catalyst poisoning, and realizing high-efficiency continuous activation of the oxidant;
(4) The Fenton reaction coupling high-activity metal oxide anode is regulated and controlled in an electronic way, the electronic Faraday efficiency is improved, and a modularized penetrating type continuous flow reactor is constructed, so that the purposes of double high-efficiency continuous oxidative degradation of pollutants are realized.
Drawings
FIG. 1 is a flow chart of the operation of the Fenton-like electrocatalytic coupling apparatus of the present invention;
FIG. 2 is a schematic diagram of a Fenton-like electrocatalytic coupling apparatus according to the present invention, wherein 1 is a wastewater storage apparatus to be treated; 2. a peristaltic pump for water inlet; 3. fenton-like electro-catalytic devices; 4. a direct current power supply device; 5. a first metal electrode; 6. a second metal electrode; 7. a DSA electrode; 8. an electrode clamping plate; 31. a reaction tank cover; 32. a reaction tank; 100. a water inlet; 200. a water outlet; 300. a water inlet compartment; 400. a water outlet compartment; 500. fenton-like intervals; 600. fenton-like-electrocatalytic coupling interval;
FIG. 3 is a self-supporting metal membrane electrode assembly of the apparatus of the present invention;
FIG. 4 is a graph of the removal effect of the device of the present invention on rhodamine B dye;
FIG. 5 is a graph showing the effect of the apparatus of the present invention on the removal of methyl orange at different pH's;
FIG. 6 is a color change of the device of the present invention for treating landfill leachate;
FIG. 7 is a three-dimensional fluorescence spectrum analysis chart of the garbage leachate treatment device of the invention;
FIG. 8 is a graph of the molecular weight change of the Fenton-like electrocatalytic coupling device of the present invention as analyzed by gel chromatography and the color change of the UV spectrophotometer during operation;
fig. 9 is an index diagram of the operation process of the Fenton-like electrocatalytic coupling apparatus of the present invention, wherein (a) is a COD change diagram and (b) is a voltage change diagram.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are merely one embodiment of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments of the invention that would be within the purview of one of ordinary skill in the art without the particular effort being made are within the scope of the invention.
Example 1
A Fenton-like electro-catalysis coupling device for advanced treatment of landfill leachate comprises a wastewater storage device 1 to be treated, a water inlet peristaltic pump 2, a Fenton-like electro-catalysis device 3 and a direct current power supply device 4,
the Fenton-like electro-catalytic device 3 comprises a reaction tank 32 and a detachable reaction tank cover (31) arranged above the reaction tank 32; wherein the reaction cell cover 31 does not need to be completely sealed;
the two sides of the reaction tank 32 are respectively provided with a water inlet 100 and a water outlet 200, an electrode module is arranged in the reaction tank, the electrode module consists of a metal electrode 5, a metal electrode 5 and a DSA electrode 4, the metal electrode 6 and the DSA electrode 7 are relatively arranged in parallel to form a first pair of electrode pairs, and the metal electrode 5 and the DSA electrode 7 are relatively arranged in parallel to form a second pair of electrode pairs; the metal electrode 5 and the metal electrode 6 are cathodes, the DSA electrode 7 is a common anode of two pairs of electrodes, the DSA electrode 7 is connected with the positive electrode of the direct current power supply device 4, and the metal electrode 5 and the metal electrode 6 are connected with the negative electrode of the direct current power supply device 4 through wires;
the reaction tank 32 is divided into three areas by the metal electrode 5 and the DSA electrode 7, namely a water inlet compartment 300, a Fenton-like compartment 500, a Fenton-like electrocatalytic coupling compartment 600 and a water outlet compartment 400, wherein the water inlet 100 corresponds to the water inlet compartment 300, and the water outlet 200 corresponds to the water outlet compartment 400;
a reagent feeding port is arranged on the reaction tank cover 31 corresponding to the water inlet compartment 300, the position of the reagent feeding port corresponds to the water inlet compartment 300, and reagent feeding equipment is connected outside the reagent feeding port;
the wastewater storage device 1, the water inlet peristaltic pump 2 and the water inlet 100 are sequentially communicated through pipelines, and the water outlet 200 is communicated with the wastewater storage device 1 through a pipeline to form a circulating passage of the coupling device.
The Fenton-like electrocatalytic device 3 in this embodiment has a quadrangular overall shape, and the top surface is designed to be in a cover-opening configuration.
The reaction tank covers 31 are four in number and respectively correspond to a water inlet compartment 300, a water outlet compartment 400, a Fenton-like compartment 600 and a Fenton-like electrocatalytic coupling compartment 700, and are made of non-conductive polytetrafluoroethylene plates; the reaction tank cover 31 serves to prevent the waste water in the reaction tank from splashing and inflow of external water bodies such as rainwater; the handle is arranged on the reaction tank cover 31, so that the reaction tank cover 31 can be conveniently opened when the device is overhauled;
the electrode module consists of two pairs of electrodes, including three electrodes: a first metal electrode 5, a second metal electrode 6 and a DSA electrode 7; the two pairs of electrodes are respectively a first pair of electrodes consisting of a parallel second metal electrode 6 and a DSA electrode 7, and a second pair of electrodes consisting of a parallel first metal electrode 5 and a DSA electrode 7; wherein the first metal electrode 5 and the second metal electrode 6 are cathodes, and the DSA electrode 7 is an anode shared by two pairs of electrodes; the first metal electrode 5 and the second metal electrode 6 of the cathode are provided with a reticular metal copper coating on the surface of a carrier which is cuprous oxide, and the DSA electrode 7 of the anode is provided with a reticular metal titanium coating on the surface of a carrier which is ruthenium oxide; the first metal electrode 5, the second metal electrode 6 and the DSA electrode 7 are fixed by an electrode clamping plate 8, the electrode clamping plate 8 comprises two polytetrafluoroethylene plates, and a wire connector is arranged on each polytetrafluoroethylene plate; the anode and the cathode are respectively connected with the anode and the cathode of the direct current power supply device 4 through lead connectors on the electrode clamping plate 8, so that the electrode materials are electrified; when the electrode is replaced, the electrode clamping plate 8 is opened, so that the used electrode can be replaced.
The reaction tank 32 is a part where oxidation-reduction reaction occurs, and refractory organic matters in the wastewater are removed by oxidation in the part; the reaction tank 33 body is composed of a sub-force plate, and the sub-force plate has the advantages of high strength, small weight and electric insulation, and is very suitable for constructing small sewage treatment equipment; the reaction cell 33 is divided into three regions by the first metal electrode 5 and the DSA electrode 7: a water inlet compartment 300, a water outlet compartment 400, and an electric field compartment; the electric field section is divided into two areas by the second metal electrode 6: fenton-like interval 500 and Fenton-like electrocatalytic coupling interval 600; the water inlet compartment 300 firstly receives the wastewater sent by the water inlet peristaltic pump 2, then receives the oxidant entering through the medicament adding port, and the wastewater and the oxidant are fully mixed in the area so as to be beneficial to the efficient operation of the follow-up Fenton-like system; the electrode clamping plate of the first metal electrode 5 can also play roles in reducing the water flow pressure of the water inlet and balancing the flow velocity, so that the impact on Fenton-like electrocatalytic reaction in the electric field interval is reduced; the lengths of the Fenton-like section 500 and the Fenton-like-electro-catalysis coupling section 600 are 2 times and 4 times that of the water inlet compartment 300 respectively, and the arrangement mode can increase the residence time of wastewater in the electric field section, so that the electro-catalysis-Fenton-like reaction can be fully performed; the first metal electrode 5, the second metal electrode 6 and the DSA electrode 7 are of three-dimensional porous structures, wastewater flows through the three electrodes in a mode of passing through the inside of the electrodes and penetrating through the electrodes, and organic pollutants in the wastewater are fully adsorbed by electrode materials in the process of flowing through the electrodes, so that degradation and removal of the pollutants are facilitated.
The method for treating the landfill leachate by using the Fenton-like electrocatalytic coupling device for deeply treating the landfill leachate comprises the following specific steps of:
after landfill leachate is treated by a biological method, the waste water with residual refractory organic matters is collected and simply stays in a waste water storage device 1 to be treated, the waste water firstly enters a water inlet compartment 300 through a water inlet 100 of a Fenton-like electro-catalysis device 3 under the pushing of a water inlet peristaltic pump 2, the water inlet compartment can stabilize the water inlet quantity and the flow rate (16-32 mL/min) of the waste water, and meanwhile, an oxidant (H) is added into equipment through a medicament adding port by a medicament adding device 2 O 2 PMS, PDS, about 10 mg/L) meeting the reaction conditions of Fenton-like oxidation technology; after reaching the concentration condition, the wastewater enters an electric field interval; the electrode module in the electric field interval is provided with two pairs of electrodes, the pairs of electrodes take a first metal electrode 5 and a second metal electrode 6 as cathodes, and a DSA electrode 7 is taken as a shared anode; under the condition that the direct-current power supply equipment 4 is electrified, various active substances with high oxidability generated by a Fenton-like electrocatalytic coupling method oxidize and degrade pollutants and pathogenic bacteria in the landfill leachate water in the flowing process of the wastewater; the finished wastewater flows into the water outlet compartment 400, returns to flow into the wastewater storage device 1, and is subjected to the next step of cyclic degradation until the water quality reaches the discharge standard, and the cycle is completed;
the oxidant added into the Fenton-like electro-catalytic device has certain oxidizing property, and can produce oxidation elimination effect on pollutants and pathogenic bacteria in water; the oxidant is first thoroughly mixed with the wastewater in the internal water inlet compartment 300 of the apparatus and then flows into the electric field compartment; the surfaces of the two cathode cuprous oxide electrode materials and the anode ruthenium oxide electrode material in the electrode module are covered with the reticular metal oxide coating, so that the electrode module has very high specific surface area, on one hand, the wastewater can have a relatively strong physical adsorption effect on pollutants in the wastewater when flowing through the electrode, and on the other hand, the micron-sized pore canal in the electrode can realize the 'limit' of the membrane catalyst on the water flow, and the direct contact between active species on the surface of the catalyst and the pollutants is enhanced, so that the catalytic efficiency of the active species with short service life is improved, and the reaction efficiency in the whole pollutant degradation and conversion process is finally improved; in the process of the electrode materials of the cathode first metal electrode 5 and the second metal electrode 6, the cuprous oxide catalyst activates the oxidant, cu (I) in the electrode materials is gradually changed into Cu (II), the poisoning loses the catalytic activity, and high-activity oxygen-containing free radicals are generated to degrade organic pollutants (as shown in the reaction formula 1)
Cu(I)+H 2 O 2 →Cu(II)+·OH+OH - (1)；
The anode starts to act gradually along with the gradual flow rate of the wastewater from the Fenton-like zone to the Fenton-like-electrocatalytic zone; on one hand, the anode is subjected to oxidation reaction, under the catalysis of ruthenium oxide serving as a high-activity anode material, organic pollutants are directly oxidized and degraded, on the other hand, electrons provided by the external electric field are transmitted to a cathode electrode material through a lead, so that the accumulation of Cu (II) in the cathode electrode material is relieved, and the cyclic regeneration of Cu (II)/Cu (I) on the surface of the cathode electrode material is promoted (as shown in a reaction formula 2).
Cu(II)+e - →Cu(I)(2)
The three electrode materials in the Fenton-like electro-catalytic device are all detachable components, and can be detached and replaced after being used for a period of time.
According to the structure of FIG. 1, a small-sized reactor with a volume of 64mL was constructed, 50mg/L rhodamine B (RhB) dye was prepared with ultrapure water, and the removal effect of the device of the present invention was tested; using the self-made electrode shown in FIG. 3, 0.1M Na was added to the reactor in view of the low electrolyte content in the test solution 2 SO 4 The electrolyte continuously runs for 4 hours under the condition of current i=16ma, and as a result, as shown in fig. 4, the absorbance of the solution continuously decreases along with the running of the device, so that the efficient removal of the pollutant rhodamine B is realized;
example 2
To test the resistance of the inventive device to alkaline pH, the removal effect on methyl orange dye was tested at pH 7 and 10, respectively. Preparing a 20mg/L methyl orange solution, adjusting the pH of the solution to 7 and 10 by using 0.05M borate, and continuously operating for 2 hours under the condition of current I=10mA; as shown in fig. 5, the experiment result shows that the complete removal of the methyl orange can be realized by running for 1h under the condition of ph=7, and the complete removal of the methyl orange can not be realized by 2h under the condition of ph=10; this also illustrates that the more alkaline bodies of water interfere with the operation of the device of the present invention.
Example 3
In order to test the treatment capacity of the device to the actual water body, the effect test is carried out by taking the biological method effluent of the landfill leachate in a certain region of Shanxi province as target wastewater; the initial COD concentration of the target wastewater is 473mg/L, the pH=8.51, the conductivity is 22.2mS/cm, and the SO is equal to 4 2- The concentration is 654mg/L, PO 4 3- The concentration is 865mg/L, cl - Concentration is 984Mg/L, (Ca+Mg) 2+ The concentration is 112mg/L. 10mg/L hydrogen peroxide is added into the reaction tank, and the continuous power-on operation is carried out for 36 hours; when the device runs for 5 hours, the COD concentration is 409mg/L, the removal effect of the refractory organics is obvious, and when the 36 hours device runs, the COD concentration is reduced to 258mg/L, thereby realizing the efficient removal of the refractory organics in the landfill leachate; in the continuous running process of the device, water samples of 3h, 4.5h, 6h and 12h are taken respectively, as shown in fig. 6, the obvious reduction of the chromaticity of the landfill leachate is observed by naked eyes, the change of molecular weight is analyzed by using gel chromatography, the change of color is analyzed by using an ultraviolet spectrophotometer, the molecular weight and the color of the landfill leachate wastewater are reduced along with the running of the device, and the high-efficiency removal of the chromaticity is realized; in addition, in the three-dimensional fluorescence spectrum analysis, the fluorescence peak intensity gradually decreases along with the increase of time, and the device further shows that the device has good advanced treatment effect on the landfill leachate.
Example 4
In order to test the running stability of the device, the electrode voltage change condition in the whole running process is also tested, the result diagram is shown in fig. 8, the voltages of the two pairs of electrode pairs float slightly in the initial stage of electrifying, and the voltages remain stable in the subsequent running process, so that the good running stability of the device is shown.
In conclusion, under the normal operation condition, the device can effectively remove the refractory pollutants in the landfill leachate, and can remove the chromaticity and COD of the landfill leachate with high efficiency and low cost; the device has high utilization efficiency on the catalyst and the oxidant, has good stability in continuous operation, and has good application prospect.
In addition, what is not described in detail in the embodiments, as to the construction of the device, and in the application, is known to the person skilled in the art.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.
Claims (7)
1. The Fenton-like electrocatalytic coupling device for deep treatment of landfill leachate is characterized in that: comprises a waste water storage device (1) to be treated, a peristaltic pump (2) for water inflow, a Fenton-like electro-catalysis device (3) and a direct current power supply device (4);
the Fenton-like electro-catalysis device (3) comprises a reaction tank (32) and a detachable reaction tank cover (31) arranged above the reaction tank (32);
the two sides of the reaction tank (32) are respectively provided with a water inlet (100) and a water outlet (200), an electrode module is arranged in the reaction tank and consists of a first metal electrode (5), a second metal electrode (6) and a DSA electrode (7), the second metal electrode (6) and the DSA electrode (7) are oppositely arranged in parallel to form a first pair of electrodes, and the first metal electrode (5) and the DSA electrode (7) are oppositely arranged in parallel to form a second pair of electrodes; the first metal electrode (5) and the second metal electrode (6) are cathodes, the DSA electrode (7) is a common anode of two pairs of electrodes, the DSA electrode (7) is connected with the positive side of the direct current power supply device (4), and the first metal electrode (5) and the second metal electrode (6) are connected with the negative side of the direct current power supply device (4) through wires;
the reaction tank (32) is divided into three areas by a first metal electrode (5) and a DSA electrode (7), namely a water inlet compartment (300), a Fenton-like compartment (500), a Fenton-like-electrocatalytic coupling compartment (600) and a water outlet compartment (400), wherein the water inlet (100) corresponds to the water inlet compartment (300), and the water outlet (200) corresponds to the water outlet compartment (400);
a reagent feeding port is arranged on the reaction tank cover (31) corresponding to the water inlet compartment (300), the position of the reagent feeding port corresponds to the water inlet compartment (300), and a reagent feeding device is connected outside the reagent feeding port;
the waste water storage device (1), the water inlet peristaltic pump (2) and the water inlet (100) are sequentially communicated through pipelines, and the water outlet (200) is communicated with the waste water storage device (1) through the pipelines to form a circulating passage of the coupling device.
2. The Fenton-like electrocatalytic coupling device for deep treatment of landfill leachate according to claim 1, wherein: the first metal electrode (5), the second metal electrode (6) and the DSA electrode (7) are all fixed through an electrode clamping plate (8); the electrode clamping plate (8) comprises two polytetrafluoroethylene plates, and electrode lead connectors are arranged on the polytetrafluoroethylene plates, so that the direct-current battery equipment (4) can be conveniently connected.
3. The Fenton-like electrocatalytic coupling device for deep treatment of landfill leachate according to claim 1, wherein: the first metal electrode (5) and the second metal electrode (6) are made of cuprous oxide carriers with reticular metal copper coatings on the surfaces; the DSA electrode (7) is made of ruthenium oxide carrier with a reticular metallic titanium coating on the surface.
4. A method for treating landfill leachate using a Fenton-like electrocatalytic coupling apparatus for deep treatment of landfill leachate according to claim 1, comprising the steps of:
step 1, after landfill leachate is treated, organic wastewater which is difficult to degrade is collected in a wastewater storage device (1) to be treated, and is simply kept stand for residence, a water inlet peristaltic pump (2) is started, the wastewater storage device (1) to be treated enters a water inlet compartment (300) through a water inlet (100), and meanwhile, an oxidant is added into a reaction tank (32);
step 2, enabling the wastewater to enter an electric field interval, and oxidizing and degrading pollutants and pathogenic bacteria in a water body by various active substances with high oxidability generated by a Fenton-like electrocatalytic coupling method in the flowing process of the wastewater under the condition that direct-current power supply equipment (4) is electrified;
and 3, enabling the finished wastewater to flow into a water outlet compartment (400), returning to flow into a wastewater storage device (1), and performing the next cyclic degradation until the water quality reaches the discharge standard, and completing the cycle.
5. The method of claim 4, wherein the oxidizing agent is H 2 O 2 One or more of PMS, PDS.
6. The method of claim 4, wherein the flow rate of the water inlet amount is 16-32 mL/min.
7. The method of claim 4, wherein the amount of the oxidant added is 10 to mg/L.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1170259A1 (en) * | 2000-07-05 | 2002-01-09 | Sony International (Europe) GmbH | Electrochemical apparatus and process for purification of fluids |
| US20200024162A1 (en) * | 2019-03-28 | 2020-01-23 | Central South University | Method and device for sewage treatment |
| CN111115761A (en) * | 2019-12-23 | 2020-05-08 | 中国科学院生态环境研究中心 | Electrochemical reaction device and method for synchronously removing total nitrogen in electroplating wastewater |
| CN112047438A (en) * | 2020-09-08 | 2020-12-08 | 湖南大学 | Method for treating organic wastewater by using double-cathode electro-Fenton continuous flow |
| CN112408555A (en) * | 2020-11-14 | 2021-02-26 | 北京工业大学 | Preparation and application of cuprous oxide/carbon nanotube/copper foam composite electrode for heterogeneous electro-Fenton system |
| CN113401981A (en) * | 2021-06-22 | 2021-09-17 | 武汉大学 | Device and method for treating organic wastewater through electro-Fenton without adding medicament |
| CN115259504A (en) * | 2022-08-31 | 2022-11-01 | 中国石油大学(北京) | Sewage treatment method and device |
-
2023
- 2023-10-24 CN CN202311381655.3A patent/CN117342658A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1170259A1 (en) * | 2000-07-05 | 2002-01-09 | Sony International (Europe) GmbH | Electrochemical apparatus and process for purification of fluids |
| US20200024162A1 (en) * | 2019-03-28 | 2020-01-23 | Central South University | Method and device for sewage treatment |
| CN111115761A (en) * | 2019-12-23 | 2020-05-08 | 中国科学院生态环境研究中心 | Electrochemical reaction device and method for synchronously removing total nitrogen in electroplating wastewater |
| CN112047438A (en) * | 2020-09-08 | 2020-12-08 | 湖南大学 | Method for treating organic wastewater by using double-cathode electro-Fenton continuous flow |
| CN112408555A (en) * | 2020-11-14 | 2021-02-26 | 北京工业大学 | Preparation and application of cuprous oxide/carbon nanotube/copper foam composite electrode for heterogeneous electro-Fenton system |
| CN113401981A (en) * | 2021-06-22 | 2021-09-17 | 武汉大学 | Device and method for treating organic wastewater through electro-Fenton without adding medicament |
| CN115259504A (en) * | 2022-08-31 | 2022-11-01 | 中国石油大学(北京) | Sewage treatment method and device |
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