Industrial wastewater treatment The principle of titanium coated ruthenium-iridium anode titanium plate is to treat industrial wastewater by electrolysis. Our company can provide titanium electrode products for wastewater treatment. For any related questions, please contact :
Introduction of Titanium Coated Ruthenium Iridium Anode Titanium Plate for Industrial Wastewater Treatment Electrocatalytic Ruthenium Iridium Titanium Mesh Anode Introduction
Commodity name: Electrochemical method industrial wastewater treatment titanium anode plate DSA electrode
Product specifications:Any size and shape can be customized according to customer drawings
Product use: Electrocatalytic anodized titanium electrode for electrolytic treatment of industrial wastewater
Product color: electrode surface black
Material composition: titanium-based coated electrodes, welding parts, etc.
Part parameters of electrocatalytic titanium electrode for treatment of industrial wastewater by electrolysis method:
1. Product shape: commonly used mesh, plate, cylinder, can also be customized according to customer needs
2. Coating system: ruthenium series, iridium series, platinum series and their mixed oxides
3. Electrode type: oxygen evolution type, chlorine evolution type, chlorine evolution oxygen evolution type
Plate Shape titanium electrodes and components display：
Mesh Shape titanium electrodes and components display：
Principle of electrolysis treatment of industrial wastewater:
The treatment of wastewater by electrolysis or electrochemical methods can be classified according to the objects to be removed and the electrochemical effects produced.
Electrolyzers are equipped with plates. The plates are properly spaced to ensure less power consumption and easy installation, operation and maintenance. The electrolytic cell is divided into two types: unipolar and bipolar according to the way of connecting the power supply of the plates. The characteristic of bipolar electrode electrolyzer is that the middle electrode generates bipolarity by electrostatic induction. Compared with the unipolar electrode electrolytic cell, the electrode connection of this kind of electrolytic cell is simpler, the operation is safe, and the power consumption is reduced. The anode is connected with the anode of the rectifier, and the cathode is connected with the cathode of the rectifier. After being energized, under the action of an external electric field, the anode loses electrons for oxidation reaction, and the cathode gains electrons for reduction reaction. The wastewater flows through the electrolytic cell, and as an electrolyte, oxidation and reduction reactions occur at the anode and cathode, respectively, and harmful substances are removed. This oxidation or reduction reaction directly on the electrode is called the primary reaction. Direct electrolytic oxidation is mainly used, and indirect oxidation and indirect reduction can also be used for electrolytic treatment of wastewater, that is, the use of electrode oxidation and reduction products to chemically react with harmful substances in wastewater to generate water-insoluble precipitates to separate and remove harmful substances. substance. It has a good removal effect on COD, ammonia nitrogen and chromaticity in degraded water.
Types of electrolytic treatment of industrial wastewater:
Electrolysis is mainly used to treat chromium-containing wastewater and cyanide-containing wastewater.
In addition, it is also used to remove heavy metal ions, oil and suspended solids in wastewater; it can also condense and adsorb dye molecules in colloidal or dissolved state in wastewater, and redox can destroy chromophores and achieve decolorization. The use of electrolysis to treat wastewater containing phenol, cadmium, sulfur, organic phosphorus and other wastewater and food industry wastewater is also in progress.
Titanium anode electrode for electrolytic treatment of industrial organic wastewater:
Different electrode materials have different reaction mechanisms and effects, but a necessary condition for all of them is high peroxygen evolution potential.
The reactions and products of organics on metal anodic oxides are related to the valence state of the anodic metal oxide and the type of oxide on the surface. A large number of research fields and practical results show that the organic matter can be completely oxidized and the current efficiency is high during the electrochemical conversion of Pt, Ti/IrO2, Ti/RuO2 anode materials.
Electrolysis is not only an effective means to deal with high-concentration organic wastewater, but also an effective and low-cost method to deal with high-concentration ammonia nitrogen. to convert ammonia to nitrogen. Through the electrode reaction, during the electrolysis process, two processes of air flotation and flocculation are realized to remove organic matter and decolorize.
Electrolysis treatment of printing and dyeing ink organic wastewater is divided into direct electrolysis and indirect electrolysis.
1. Direct electrolysis
Generally, diaphragm electrolytic cells (constant current, given cell pressure) and non-diaphragm electrolytic cells (constant potential, steady current) are used. There is no fundamental difference between these two modes, but a potentiostat is used to control the anode potential. Degrading and decolorizing the organic wastewater of printing and dyeing ink in the mode can better avoid the side reaction caused by the increase of the tank pressure, resulting in the reduction of the current efficiency and other problems.
2. Indirect electrolysis
The indirect electrolytic oxidative decolorization of organic wastewater from printing and dyeing ink is to use the strong oxidant produced by electrolysis to oxidize the dye. In the chloride-containing medium, the formation of CIO- by the anode chlorine evolution, or the formation of oxidative dye molecules by electrolysis, is a common form of indirect electro-oxidation of organic wastewater from printing and dyeing inks.
3. Mechanism of Electrolysis Treatment of Organic Wastewater from Printing and Dyeing Ink
The added electrolyte is generally NaCl, which helps to decolorize wastewater and remove COD. The reason is that when the NaCl solution is electrolyzed, a chlorine release reaction occurs on the anode, and Cl2 is a strong oxidant. Cl2, Na+ and O2 further generate NaClO, which has stronger oxidizing properties. Both Cl2 and NaClO are strong oxidizing agents that can oxidize dye molecules, breaking long bonds and discoloring them. In addition, after adding NaCl, the electrolysis of H2O is accelerated, and the bubbles formed by the H2 continuously generated by the cathode move upward with branched flocs, which accelerates the flotation and flocculation of organic matter. Electrolysis has better treatment effect on dye wastewater.
4. Titanium anode for treatment of organic wastewater from printing and dyeing ink by electrolysis
In the process of treating organic wastewater by electrolysis, the electrode not only plays the role of conveying current, but also catalyzes the oxidative degradation of organic matter. Therefore, the choice of electrode material directly affects the degradation efficiency of this organic matter. The general anode uses a titanium-based PbO2 anode or a titanium-coated titanium electrode.
The titanium anode produced by HS metal for the treatment of organic wastewater from printing and dyeing ink by electrolysis is stable in size, and the distance between electrodes does not change during the electrolysis process. It can be reduced by 10-20%, and the titanium substrate can be reused, saving costs, saving energy and reducing consumption.
In this electrolysis technology, the main factors affecting the electrolysis effect are: electrode material, electrode area, electrolysis time, auxiliary electrolyte concentration, etc.
There are many ways to treat industrial wastewater, electrolysis water treatment technology is called environment-friendly technology, or green water treatment technology. Moreover, for wastewater that cannot be treated by biodegradation, electrolytic oxidation often has a significant effect. Therefore, electrolytic water treatment technology has become a research hotspot in water treatment technology and has been more and more widely used.
The basic principle of electrolysis water treatment technology is to make pollutants undergo direct electrochemical reaction or indirect electrochemical transformation on the electrode, that is, direct electrolysis or indirect electrolysis.
(1) Direct electrolysis
Direct electrolysis refers to the removal of pollutants from wastewater by direct oxidation or reduction on electrodes. Direct electrolysis can be divided into anodic process and cathodic process. The anode process is the oxidation of pollutants on the surface of the anode to convert them into less toxic substances or substances that are easily biodegradable, and even inorganic organic matter, so as to achieve the purpose of reducing and removing pollutants. The cathode process is the reduction of pollutants on the cathode surface to remove them, which is mainly used for the reduction and dehalogenation of halogenated hydrocarbons and the recovery of heavy metals.
(2) Indirect electrolysis
Indirect electrolysis refers to the use of electrochemically generated redox species as reactants or catalysts to convert pollutants into less toxic substances. Indirect electrolysis is divided into reversible and irreversible processes. A reversible process (mediated electrochemical oxidation) means that the redox can be electrochemically regenerated and recycled during electrolysis. Irreversible process refers to the use of irreversible electrochemical reactions to produce substances, such as the process of oxidizing organic compounds such as chlorate, hypochlorite, H2O2 and O3 with strong oxidizing properties, and can also use electrochemical reactions to generate strong oxidizing intermediates. , including solvated electrons, HO, HO2, O2- and other radicals.
In the electrolysis process, the electrode acts as an electrocatalyst, and the electrode material can change the order of magnitude of the electrochemical reaction rate, so the appropriate selection of electrode material is an effective way to improve the electrocatalytic activity. Titanium electrodes have been widely used due to their good electrocatalytic properties, high oxygen evolution overpotential and electrical conductivity.
Titanium electrodes for industrial wastewater treatment have the following characteristics:
①No impurities are generated in the electrolytic cell;
②It can be applied to different working conditions of current density;
③ It can be applied to the electrode inversion system;
④The anode can be used repeatedly after recoating;
⑥ Can be used for organic compounds in the electrolyte
Coating systems for titanium electrodes for industrial wastewater treatment: platinum; iridium metal oxide; platinum iridium oxide
The product series of titanium electrodes for industrial wastewater treatment: titanium electrode plates, titanium mesh electrodes, titanium electrode rods, titanium electrode wires, etc., and can also be customized according to customer specific requirements.