Introduction
Treatment of a wide spectrum of wastewater contaminants, under a variety of circumstances, requires cost-effective solutions. Electrocoagulation offers a relatively robust and compact alternative, to conventional treatment approaches. Metal anodes start electrochemical reactions that produce active metal cations, for coagulation and flocculation. Because, no coagulants must be added to the wastewater during electrocoagulation, the salinity of the water does not rise after treatment.
What is electrocoagulation?
Water, wastewater, and process water are all treated by electrocoagulation effluent treatment plants (ETPs). Due to its capacity to eliminate numerous contaminants, such as colloidal silica, emulsified oils, total petroleum hydrocarbons, BOD, COD, refractory organics, trace heavy metals, and suspended solids, more effectively and economically than conventional chemical treatment systems, electrochemical technology has emerged as a sustainable water/wastewater treatment technique.
This specialized technology optimizes pollutant removal in a financially feasible and environmentally responsible manner, by combining the benefits and capabilities of conventional coagulation, flotation, and electrochemistry in one modular water, and wastewater treatment solution.
Contaminants removed by electrocoagulation
Electrocoagulation process involves removal of
· Suspended solids,
· Heavy metals,
· Petroleum products,
· Colour from a dye-containing solution,
· Aquatic humus,
· Fluorine from water and urban wastewater,
It is also used for treating a variety of effluents containing metals, foodstuffs, olive oil, textile dyes, polymeric wastes, organic matter from landfill leachate, turbidity, chemical and mechanical polishing wastes, aqueous suspensions of ultrafine particles, nitrate, phenolic waste, arsenic, as well as municipal wastewater.
What are the application areas of electrocoagulation?
The following industries can employ specialized electrocoagulation treatment technology, to handle water and wastewater, in both decentralized water utilities and industrial water treatment applications.
· Petrochemical
· Oil and Gas
· Power Generation
· Mining
· Food and Beverage
· Textile
· Pharmaceuticals
· Pulp and Paper
· General Manufacturing
Process of electrocoagulation
Step 1:The main steps of the electrocoagulation process are the dissolution of metal cations from the reactor anode, and the concurrent production of hydroxyl ions and hydrogen gas at the cathode.
Step 2:Water is converted simultaneously into hydrogen gas and the hydroxyl ion (OH). Thus, utilizing sacrificial anodes (usually made of iron, stainless steel, or aluminium) that must be regularly changed, electrocoagulation inserts metal cations in-situ.
Step 3:A mixture of elimination processes working in concert makes up the overall reaction mechanism. The dominating mechanism may change as the reaction advances through the dynamic process, and it will undoubtedly alter as treatment settings, operating parameters, and in particular pollutant types change.
Step 4:By creating monomeric and polymeric hydroxo complex species, highly charged cations (Al3+; Fe2+) created at the anode destabilize colloidal particles, during electrocoagulation.
Step 5:These metal hydroxo complexes have excellent adsorption abilities, and can bind to contaminants to form solid aggregates. The overall metal cation concentration, pH, type, and concentration of other species in solution, all affect how much metal is hydrolysed.
Step 6:Fe2+ and iron hydroxide, Fe(OH)n, are produced during electrolysis in the presence of an iron electrode.
Step 7:Reactive clusters for wastewater treatment are also produced, as a result of the pre-hydrolysis of ferric iron ions. These give scattered particles and negatively charged counter ions a strong affinity, which leads to coagulation.
Step 8:It's possible that the gases (H2, O2) produced at the electrodes, will induce the coagulated materials to float. The electrolytic gas produces a flotation action once the floc is formed, removing the contaminants to the floc-foam layer at the liquid surface.
Which kind of water sources can be treated by a modular electrocoagulation water treatment system?
Water sources with elevated TDS levels above 500 mg/l, however, often use less power during the treatment process. Electrocoagulation is usually used to treat-
· Surface water
· Seawater/Highly Brackish water
· Processed Water
· Wastewater
· ROC (Reverse Osmosis Concentrate)
Conclusion
Industries and water utilities can improve an existing water or wastewater treatment process configuration, or optimize their current treatment process by adding dependability, lowering maintenance and operations costs, as well as sludge disposal costs, with the help of an electrocoagulation system.
Choose the best treatment technology for your industry
Netsol Water specialized electrocoagulation systems have a lower life cycle cost, and can protect streams, which might affect people, animals, and aquatic life.
Netsol Water is Greater Noida-based leading water & wastewater treatment plant manufacturer. We are industry's most demanding company based on client review and work quality. We are known as best commercial RO plant manufacturers, industrial RO plant manufacturer, sewage treatment plant manufacturer, Water Softener Plant Manufacturers and effluent treatment plant manufacturers. Apart from this 24x7 customer support is our USP. Call on +91-9650608473, or write us at enquiry@netsolwater.com for any support, inquiry or product-purchase related query.