CN212198916U - Three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system - Google Patents
Three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system Download PDFInfo
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- CN212198916U CN212198916U CN202020129652.6U CN202020129652U CN212198916U CN 212198916 U CN212198916 U CN 212198916U CN 202020129652 U CN202020129652 U CN 202020129652U CN 212198916 U CN212198916 U CN 212198916U
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Abstract
The utility model discloses a three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system, which is characterized in that the wastewater treatment system consists of electrochemical and electric biological treatment, and the electrochemical treatment comprises two reactors which are filled with composite activated carbon particle electrodes between a positive electrode and a negative electrode; the electric biological treatment comprises two reactors composed of biomembrane particle electrodes filled between an anode and a cathode; the upper parts of the cathode chamber and the anode chamber of the reactor are provided with a water inlet and a water outlet, and the lower parts of the cathode chamber and the anode chamber are provided with aeration ports. Compared with the prior art, the utility model simple structure has, convenient operation, the system energy consumption is low, and waste water degradation is efficient, easily realizes the industrialization and uses, provides new solution for coking wastewater treatment, helps promoting the application of three-dimensional electrochemistry technique in the sewage treatment field.
Description
Technical Field
The utility model belongs to the technical field of coking wastewater treatment device technique and specifically relates to a three-dimensional electrochemistry coupling three-dimensional electricity biological coking wastewater treatment system.
Background
The coking wastewater mainly comes from the processes of coking, gas purification, refining of chemical products and the like, has complex components and poor biodegradability, and is typical non-degradable toxic and harmful industrial wastewater. The coking wastewater contains complex organic and inorganic pollutants such as phenols, benzenes, nitrogen-containing heterocyclic organic matters, polycyclic aromatic hydrocarbons, ammonia nitrogen, cyanides, sulfides, thiocyanides and the like, the complex pollutants are various in types, high in concentration and high in toxicity, and the conventional biochemical process treatment is difficult to discharge after reaching the standard due to the special properties of the wastewater.
At present, most of treatment processes for coking wastewater are biochemical methods, including anaerobic-aerobic (A/O), anaerobic-anoxic-aerobic (A/A/O) and other processes. However, the pollutants in the coking wastewater have complex structures and strong biological toxicity, so that the effluent of a biochemical system is not ideal and cannot reach the national emission standard. Physical and chemical methods such as coagulation, precipitation, adsorption, ion exchange and the like are commonly used for pretreatment of coking wastewater, but the methods have the defects of large dosage, high price, large amount of generated sludge, difficult regeneration of an adsorbent, easy secondary pollution and the like, so that the methods are difficult to apply on a large scale.
The electrochemical method has the advantages of high treatment efficiency, simple equipment, simple operation, no secondary pollution and the like. The three-dimensional electrode reactor is characterized in that conductive particles are filled between a cathode plate and an anode plate of a traditional electrolytic tank, and the two ends of the particles are respectively charged with positive charges and negative charges under the action of an electric field of a main electrode to form a third-dimensional particle electrode, so that the electrolytic efficiency is improved, and the treatment performance of the reactor is enhanced. The three-dimensional electrode reactor can generate a large amount of active oxidation substances such as hydroxyl free radicals and the like in the electrolytic process, has strong oxidizability, and can oxidize organic matters in wastewater into carbon dioxide, thereby achieving the purpose of removing pollutants. In recent years, three-dimensional electrochemical treatment technology has been applied to the treatment of high-concentration refractory organic wastewater, and although some progress is made in small-scale and reactor design, the problems of high running energy consumption and the like still exist. At present, no report and published technology for degrading wastewater by coupling a three-dimensional electrochemical reactor and a three-dimensional electric bioreactor is available.
Contents of utility model
The utility model aims at the defects of the prior art and designs a three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system, which adopts a biomembrane technology to couple with a three-dimensional electrochemical reactor, and the electric active biomembrane cultured on a particle electrode interface is used for strengthening the degradation of high-concentration refractory organic wastewater under the synergistic action of electricity and microorganisms, a large amount of active oxidation substances are generated in the electrolytic process, the system has strong oxidability, and organic matters in the wastewater can be oxidized into carbon dioxide, thereby achieving the purpose of removing pollutants, the coking wastewater is treated by two-stage electrochemistry and two-stage electric biological units, thereby not only improving the removal efficiency of pollutants, but also avoiding the hydraulic short-flow phenomenon under the continuous operation condition, the system has low energy consumption, high wastewater degradation efficiency, simple structure, simple and convenient operation, and easy realization of industrial application, provides a new solution for the coking wastewater treatment, can efficiently degrade the coking wastewater, can save energy consumption, and is beneficial to promoting the application of the three-dimensional electrochemical technology in the field of sewage treatment.
The purpose of the utility model is realized like this: a three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system is characterized in that the coking wastewater treatment system consists of a three-dimensional electric biological treatment unit, a pulse power supply and a direct current power supply, wherein the three-dimensional electric biological treatment unit is connected with the three-dimensional electric biological treatment unit through an intermediate water collecting tank; peristaltic pumps are arranged on serial pipelines of the two three-dimensional electrode reactors; the three-dimensional electric biological treatment unit consists of another two three-dimensional electrode reactors connected in series and a biological film particle electrode filled between the anode plate and the cathode plate; another peristaltic pump is arranged on a serial pipeline of the other two three-dimensional electrode reactors; a peristaltic pump is arranged on a pipeline connecting the middle water collecting tank and the three-dimensional electric biological unit; the upper parts of the cathode chamber and the anode chamber of the three-dimensional electrode reactor are provided with a water inlet and a water outlet, and the lower parts of the cathode chamber and the anode chamber are provided with aeration ports.
The coking wastewater is input into the three-dimensional electrochemical treatment unit by the peristaltic pump for primary wastewater treatment, and then is input into the three-dimensional electrobiological treatment unit for secondary wastewater treatment. The reactor filling composite active carbon particle electrode of the three-dimensional electrochemical treatment unit is characterized in that metal oxides (copper oxide, manganese dioxide and ferric oxide) in a certain proportion are loaded on the surface of granular active carbon by a dipping and calcining method; the reactor filling biomembrane particle electrode of the three-dimensional electric biological treatment unit is granular activated carbon hanging with a biomembrane, and the surface of the reactor filling biomembrane particle electrode is enriched with an electric active biomembrane for degrading coking wastewater; filling the granular activated carbon with the biofilm hanging function in a reactor of a three-dimensional electric biological unit to serve as a biofilm carrier, inoculating activated sludge, taking coking wastewater treated by the three-dimensional electrochemical treatment unit as a substrate, and acclimating for 25-35 days by using 10-20 mA current provided by a direct current power supply until a brown biofilm is observed on the surface of the granular activated carbon; the volume ratio of filling particle electrodes of the three-dimensional electrode reactor is 50-70%; the three-dimensional electrochemical processing unit is powered by a pulse power supply, the voltage of the three-dimensional electrochemical processing unit is 8-20V, the duty ratio of the three-dimensional electrochemical processing unit is 50-80%, and the frequency of the three-dimensional electrochemical processing unit is 1000 Hz; the three-dimensional electric biological treatment unit is powered by a direct-current power supply in operation, and the voltage of the three-dimensional electric biological treatment unit is 3-10V; the composite activated carbon particle electrode needs to be regenerated after running for 24-96 hours; and the regeneration is to add tap water into a reactor for two-stage treatment, maintain the conventional operation condition, perform electrolysis treatment for 15-60 minutes, discharge sewage after the regeneration is finished, and input coking wastewater into the reactor for electrochemical treatment.
Compared with the prior coking wastewater treatment technology, the utility model has the advantages that:
1) the reactor takes a supported activated carbon catalyst as a particle electrode, which can effectively promote the generation of active oxidation substances such as hydroxyl radicals and improve the removal effect of organic matters in coking wastewater.
2) The three-dimensional electrochemical processing unit effectively relieves the electrode passivation in a pulse power supply mode, and the system operation stability is enhanced.
3) The three-dimensional electric biological treatment unit applies weak current, promotes microbial activity, and greatly reduces system energy consumption.
4) The three-dimensional electrochemical treatment unit and the three-dimensional electric biological treatment unit both adopt two-stage treatment processes, so that the condition of hydraulic short flow in a continuous flow operation mode is avoided, and the treatment effect is improved.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a diagram showing the effect of COD treatment on wastewater;
FIG. 3 is a diagram showing the effect of TN treatment on wastewater.
Detailed Description
Referring to FIG. 1, the present invention is a three-dimensional electrochemical processing unit
And a three-dimensional electrobiological treatment unit
The system comprises a three-dimensional electrode reactor 5, a peristaltic pump 8, a pulse power supply 9, an intermediate water collecting tank 10 and a direct current power supply 12. The three-dimensional electrochemical processing unit
The device consists of two three-dimensional electrode reactors 5 connected in series and a composite activated carbon particle electrode 4 filled between an anode plate 1 and a cathode plate 2; peristaltic pumps 8 are arranged on the two pipelines connected in series; the three-dimensional electric biological treatment unit
The device consists of another two three-dimensional electrode reactors 5 connected in series and a biomembrane particle electrode 11 filled between an anode plate 1 and a cathode plate 2; the other two pipelines connected in series are provided with another peristaltic pump 8; the intermediate water collecting tank 10 and the three-dimensional electric biological treatment unit
A peristaltic pump 8 is arranged on the connected pipeline; the composite active carbon particle electrode 4 is a catalyst loaded on the surface of the granular active carbon by adopting a dipping or calcining method according to the mass ratio of copper oxide, manganese dioxide and ferric oxide of 1:1: 1; the biomembrane particle electrode 11 is granular activated carbon inoculated with activated sludge, and the surface of the electrode is enriched with an electroactive biomembrane for degrading coking wastewater.
The three-dimensional electrochemical processing unit
Each compartment of the medium three-dimensional electrode reactor 5 comprises: the cathode plate 2, the anode plate 1, the composite activated carbon particle electrode 4 filled between the cathode plate and the anode plate, and the pulse power supply 9 for supplying power to the electrodes; the upper parts of the cathode chamber and the anode chamber of the three-dimensional electrode reactor 5 are provided with a water inlet 3 and a water outlet 7, and the lower parts of the cathode chamber and the anode chamber are provided with an aeration port 6.
The three-dimensional electric biological treatment unit
Each compartment of the medium three-dimensional electrode reactor 5 comprises: a cathode plate 2, an anode plate 1, a biomembrane particle electrode 11 filled between the cathode plate and the anode plate, and a direct current power supply 12 for supplying power to the electrodes; the upper parts of the cathode chamber and the anode chamber of the three-dimensional electrode reactor 5 are provided with a water inlet 3 and a water outlet 7, and the lower parts of the cathode chamber and the anode chamber are provided with an aeration port 6.
The present invention will be described in further detail with reference to the treatment of coking wastewater.
Example 1
The utility model discloses a three-dimensional electricity of mode operation three-dimensional electrochemistry coupling of continuous flow biological coking wastewater treatment system will be got from the coking wastewater filtration of equalizing basin and get rid of the suspended particulate matter, inputs three-dimensional electrochemistry processing unit through peristaltic pump 8
The effluent of the first three-dimensional electrode reactor 5 enters the second three-dimensional electrode reactorThe three-dimensional electrode reactor 5 is filled with the composite activated carbon particle electrodes 4 in the two three-dimensional electrode reactors 5, so that the generation of active oxidation substances such as hydroxyl radicals can be effectively promoted, and the degradation effect on organic matters is improved. Three-dimensional electrochemical processing cell
The treated wastewater is discharged into an intermediate water collecting tank 10 through a water outlet 7, and the wastewater in the intermediate water collecting tank 10 is input into a three-dimensional electric biological treatment unit by a peristaltic pump 8
The effluent of the first three-dimensional electrode reactor 5 enters the second three-dimensional electrode reactor 5, a biomembrane particle electrode 11 filled in the two three-dimensional electrode reactors 5 adopts granular activated carbon as a biomembrane carrier to carry out biofilm formation, and microorganisms of the biomembrane particle electrode are inoculated to activated sludge of a municipal sewage treatment plant and pass through a three-dimensional electrochemical treatment unit
The coking wastewater is taken as a substrate, domestication is carried out in a three-dimensional electrode reactor 5 for about 30 days, 120mA current provided by a direct current power supply 12 is used during domestication, metabolic activity of microorganisms is carried out under the stimulation of weak current until a brown biological film is observed to be formed on the surface of granular activated carbon, pollutants are intensively degraded under the synergistic action of the microorganisms and the electricity, and the wastewater is discharged out of a wastewater treatment system through a water outlet 7.
The effective volume of the three-dimensional electrode reactor 5 in the embodiment is 1.5L, the filling amount of the particle electrode is 1000 g, and the anode plate 1 and the cathode plate 2 which are used are both titanium-based ruthenium iridium oxide electrodes. Three-dimensional electrochemical processing cell
The applied pulse voltage is 8V, and the three-dimensional electric biological treatment unit
The applied direct current voltage is 3V, and the hydraulic retention time of the system is 10h, the aeration rate is 100L/h.
Referring to the attached figures 2-3, enter a three-dimensional electrochemical processing unit
The coking wastewater of the first three-dimensional electrode reactor 5 has COD concentration of 642-856 mg/L and total nitrogen concentration of 196-246 mg/L, and is treated by a three-dimensional electrochemical treatment unit
After most pollutants which are difficult to degrade are removed, the three-dimensional electric biological treatment unit is input
Further removing residual pollutants in the wastewater, wherein the average removal rates of COD and total nitrogen of the coking wastewater after electrochemical and biological secondary treatment are 79.6 percent and 76.3 percent respectively.
The present invention is further described without limiting the scope of the present invention, and all equivalent implementations of the present invention are intended to be encompassed by the scope of the claims of the present invention.
Claims (6)
1. A three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system is characterized in that the coking wastewater treatment system is composed of a three-dimensional electrochemical treatment unit
Three-dimensional electric biological treatment unit connected by intermediate water collection tank (10)
Composition of the three-dimensional electrochemical processing unit
Consists of two three-dimensional electrode reactors (5) connected in series and a composite active carbon particle electrode (4) filled between an anode plate (1) and a cathode plate (2)(ii) a Peristaltic pumps (8) are arranged on the two pipelines connected in series; the three-dimensional electric biological treatment unit
The device consists of another two three-dimensional electrode reactors (5) which are connected in series and a biomembrane particle electrode (11) which is filled between an anode plate (1) and a cathode plate (2); the other two pipelines connected in series are provided with another peristaltic pump (8); the intermediate water collecting tank (10) and the three-dimensional electric biological treatment unit
A peristaltic pump (8) is arranged on the connected pipeline.
2. The three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system according to claim 1, characterized in that the biofilm particle electrode (11) is granular activated carbon inoculated with activated sludge, and the surface of the biofilm particle electrode is enriched with an electric active biofilm for degrading coking wastewater.
3. The three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system according to claim 1, characterized in that the volume ratio of the filling of the activated carbon particle electrode (4) and the biofilm particle electrode (11) is 50-70%.
4. The three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system according to claim 1, characterized in that the upper parts of the cathode chamber and the anode chamber of the three-dimensional electrode reactor (5) are provided with a water inlet (3) and a water outlet (7), and the lower parts of the cathode chamber and the anode chamber are provided with an aeration port (6).
5. The three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system according to claim 1, characterized in that the three-dimensional electrochemical treatment unit
And IIIVitamin electricity biological treatment unit
The pulse power supply (9) and the direct current power supply (12) are respectively adopted for supplying power.
6. The three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system according to claim 5, characterized in that the voltage of the pulse power supply (9) is 8-20V, the duty ratio is 50-80%, and the frequency is 1000 Hz; the voltage of the direct current power supply (12) is 3-10V.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111253003A (en) * | 2020-01-20 | 2020-06-09 | 华东师范大学 | Three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111253003A (en) * | 2020-01-20 | 2020-06-09 | 华东师范大学 | Three-dimensional electrochemical coupling three-dimensional electric biological coking wastewater treatment system |
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