Explore Mechanism, Features, Advantages, Applications of Electro Oxidation For Wastewater Treatment
Electro Oxidation Wastewater Treatment
Brief Introduction About Electro Oxidation Wastewater Treatment
Electro oxidation is one of most innovative and advanced wastewater treatment techniques amongst advanced oxidation processes (AOPs) adopting anodic oxidation or electrochemical advanced oxidation that apply electricity to mineralize refractory organic contaminants. Electro oxidation technology requires electrochemical cell setup, electrodes, electricity input, and electro oxidation/reduction reactions within the electrolysis processes. Currently, electro oxidation technology is applied to treat industrial effluents, or improve biodegradeability of complex wastewater.
How Does Electro Oxidation Wastewater Treatment Works? The Mechanism
Electro oxidation requires applying electrical energy, electron trafer between the electrolyte, and anode was expedited once electricity applied, certain organic pollutants could be mineralized directly around the surface while electron transfer processes happen between the anode and electrolyte, that is the mechanism of direct oxidation within electro oxidation processes. Indirect oxidation invloves electrochemical generation of reactive oxidizing agents such as hydroxyl radicals (OH), a reactive oxygen specie with higher oxidation potential amongst its types and other highly active radicals, for instance, sulfate radicals (SO) within the electrolytic reaction processes, migrate into the solution. Radicals mineralize organic matters by breaking chemical bonds such as C-C, C-N, and etc, and degrade into ingranic forms (H2O, CO2, etc,) or simpler organic compounds as intermediates with smaller molecules could be mineralized with further oxidation via a vast variety of pathways, organic compounds from the wastewater could be break apart into intemediates, and eventually degraded, instead of concentrated, does not for further treatment afterwards.
Find Out More Details About The Mechanisms Of Electro Oxidation Treatment Technique Within The Electrolytic Process Conent
Main Factors Affect Electro Oxidation Wastewater Treatment Efficiency
We discussed about the mechanisms of electro oxidation wastewater treatment processes, by explaining direct and indirect oxidation, and how these two mechanisms enhance the comprehensive capability and efficiency when it comes refractory organic compounds mineralization and eventually complete removal within the previous section. In this section, we will cover main factors affect electro oxidation wastewater treatment efficiency, mainly based on years of experiences with electro oxidation treatablity test, wastewater treatment product research and development processes, and implement of electro oxidation wastewater treatment products, from trial scale, to pilot scale industrial wastewater treatment projects.
Check the key points affect electro oxidation wastewater treatment efficiency we listed below:
Electrode materials: People in water and wastewater treatment industry and electrochemical research niche have adopted a vast variety of electrode materials for electro oxidation wastewater treatment processes, factors such as: Capability of electrochemical generation of oxidizing agents, which affects the comprehensive organic compounds removal efficiency as different electrode has different surface property and electro-catalytic activity. Chemical and mechanical robust, electrodes with stable chemical and mechanical stability can emit constant and stable performance within the electrolytic processes, and that means less chance of fouling. Stainless steel, platinum, lead dioxide (PbO2), mixed metal oxide(MMO), titanium, and boron-doped diamond (BDD) electrodes and etc, are adopted to conduct electro oxidation wastewater treatment, we will resume dicussions about comparison of different electrode materials in electro oxidation application in other contents.
Surface area: Actually electro oxidation reaction efficiency will be affected by the surface area of an electrode, as active area of electrodes, electron transfer, and larger surface area means enhanced electro oxidation of refractory organic compounds within the electrolyte (wastewater), therefore improve the comprehensive oxidation efficiency, yes, as you may have noticed from the previous section, surface area is one of those factors impact direct and indirect oxidation. .
Wastewater compositions: Characteristics such as oxidation potentials, potential to be degraded into intermediates, or inorganic matters, are different amongst different type of organic pollutants, and ions in the waste streams might affect the conductivity of the electrolytes, therefore it’s critical to conduct treatability testing prior to electro oxidation technology implement in actual wastewater treatment, that is to identify the content of the wastewater you need treat, via electro oxidation.
pH level: Hydroxyl radicals are the major group of reactive oxygen species mineralize organic compounds within the electro oxidation processes, and yes, pH level within the electrolyte (wastewater) does affect the electrochemical generation of these active oxidizing agents on the surface of anode, as hydroxyl radicals will be more prevailing in alkaline conditions, according to our tests.
Current density: Current density reflects the mass transfer of electron, which means current density could actually affect the efficiency of direct oxidation, transfer of electrode, therefore it’s critical to keep some mediate current density to expedited oxidation reaction rate, but yet, minimize chances of undesired oxygen evolution, that is the key to constant electro generation of reactive oxygen species.
Electrochemical Cell Design: Electrochemical cells are critical when it comes to implements of electro oxidation wastewater treatment processes, as electrochemical cells are the main spaces for electrolytic processes, and distance between electrodes, active electrode surface area, cell holding space, flow rate, initial COD level, hydraulic retention time, and COD removal efficiency.
Electro Oxidation Wastewater Treatment Features & Advantages
Environmental friendly: Redox reagents used to mineralize organic pollutants anre electrochemically generated during the wastewater electrolysis processes,which means electro oxidation doesn’t require the addition of toxic chemicals.
Efficiency: Electro oxidation is highly efficient when it comes to removal of various types of organic compounds found in waste streams from different industries.
Easy operation and automate,modular design: Given its mediate requirement toward operation conditions, ease to add automatic operator access, modularized design to fit into various scales of wastewater treatment needs, electro oxidation is a great option for complex wastewater treatment projects.
Less chance of sludge generation: Unlike other advanced oxidation processes (AOPs) such as Potassium permanganate oxidation: and Fenton processes (an Iron-based AOPs treatment method), electro oxidation has no or few byproducts when it comes to sludge formation.
Electro Oxidation Wastewater Treatment Application Ranges
Electro oxidation wastewater treatment methods could be applied to treat industrial wastewater with refractory organic pollutants at high concentration level.
Wastewater with different pH level (except those with fluoride ion)
Organic wastewater with high salinity, higher salt content means higher conductivity
Further treatment of concentrate after membrane, MVR, RO
Wastewater contain toxic CN-, NaN3, organophosphorus, organic sulfur
Various types of water defined as hazardous waste streams
Improve effluents quality, COD level to compliance with regulations
Organic wastewater with organic pollutants can not treated via standard biological treatment methods.
Electro Oxidation Wastewater Treatment Efficiency & Results
Check the charts below to find out treatment efficiency and results of electro oxidation wastewater treatment technology, share your water profile to get an assessment over your industrial effluents, it’s free of charge, we offer not only treatment methods, but also a comprehensive solution, service to various industries.
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Electro Oxidation Wastewater Treatment Projects & Case Studies
By delving into these case studies and projects, we provide abundant data and information on the successful application of BDD electrodes and electro oxidation wastewater treatment systems across diverse industries. We always deliver solution with sustainability, environmental stewardship, and economic viability through innovative water treatment technology. Join us in revolutionizing the way we approach wastewater treatment, one case study at a time.
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Application of Boromond wastewater Treatment System Over Pharmaceutical Wastewater To Remove Active Pharmaceutical Ingredient
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Empowers specialty chemical manufacturers to degrading biocides, active ingredients, obstinate COD, and micropollutants.
Pesticides
Our water treatment equipment exceed at eliminating perilous organic chemical pollutants such as insecticides, herbicides, and pesticides.
Petroleum & Gas
Innovative tertiary treatment solution tailored to the challenge of addressing recalcitrant and hazardous organic compounds, such as BTEX and phenols.
Electro Oxidation Wastewater Treatment Products
We spent years on research of electro oxidation wastewater treatment technology, with years of experiences with prototyping and developing elecrto oxidation wastewater treatment products, we present trial scale wastewater treatment products, and pilot scale wastewater treatment system, with deep comprehension of electrode material selection, electrochemical cell set-up, electrolytic processes optimization, treatment objects, flow rate, COD removal efficiency, energy efficiency, and etc. Explore our electro oxidation water treatment products for different scale and application ranges.
Electro Oxidation Wastewater Treatment Electrode Material
Key factors to consider about while selecting an electrode material for electro oxidation water treatment: Electrode materials for electro oxidation or electrolytic treatment processes are usually fabricated with conductive metal substrate, while external part are coated with reactive catalyst material, given the truth that oxidizing agents are critical for electrolytic treatment processes, capability of massive electrochemical generation of hydroxyl raidals (•OH) is one of major factors to consider when it comes to electrode material selection. Reactivity ranking of different electrode from the lowest to the highest, active electrodes such as tin oxide, lead dioxide (PbO2), iridium oxide (IrO2) non-active electrodes such as Pt (platinum), and boron-doped diamond electrode (BDD) are selected for the electro oxidation treatment process And let’s discuss efficiency here, electrode materals with higher oxygen overpotential could not only emit higher oxygen evolution, which means these electrodes expdited electrochemical generation of hydroxyl radicals, but also reduce side reactions, for instance, oxygen generation, boron doped diamond electrode is one of electrode with the highest oxygen overpotential, which make it one of the most efficient anodes for eletro oxidation. Mixing For the most effective results, it’s often best to mix and match different electrode materials for each application. This can help to maximize reactivity while minimizing energy use and costs.
Boron doped diamond(BDD) electrode is one of the non-active electrode materials with unmatched electrochemical and physical properties such as high stability, higher pontetial window/oxygen overpotential which means much higher efficiency when it comes to massive electrochemical generation of oxidizing agents, resistant to corrosion, with less chance of fouling, does not require regular replacing.
Electro Oxidation Wastewater Treatment Trial Test Reactor
Equipped with premium quality boron-doped diamond (BDD) electrodes, and titanium cathodes, magnetic stirrer, AC power supply, and supporting accessories to improve efficiency of wastewater electrolysis processses. With a capacity of 1000 mL, sampling hole, minimized compact size, BK3.0 serves as a testing equipment for trial scale electro oxidation treatment technique, it’s an ideal tool to conduct electro oxidation treatability trial for chemical and electrochemical research agencies, wastewater treatment product development laboratories, and water and wastewater treatment companies, environmental services. Get in touch with our team by writing email to enquiry@evoaeo for more information.
Electro Oxidation Wastewater Treatment Portable Testing Kit
Portable testing kit is the latest electro oxidation equipment within the trial scale product line, with display panel, current/voltage control, ready to install input and output interface, this testing kit is the very first portable on-site electro oxidation treatment equipment designed for wastewater treatment plants, manufacturers, environmental services, wastewater management seeking effective and sustainable wastewater treatment methods prior to reuse or safely discharged into environment, and seeking balance between treatment objectives, efficiency, compliance with increasing regulations and environmental concerns.