Electro Coagulation for Waste Water Treatment
By QualityS
EC Treatment
Suspended Solids Removal
Electrochemical precipitation is most commonly referred to as Electrocoagulation, which is a method of applying direct current to sacrificial electrodes that are submerged in an aqueous solution. When the proper voltage is applied, charged ions are released from the electrodes, which neutralize the charge of the contaminant and force them to precipitate. Hydroxyls are created as water molecules split through electrolysis, which causes contaminants to oxidize and hydroxides to be created. The majority of hydroxides come from the metal ions being released from the sacrificial electrodes in the form of either aluminum hydroxide or iron hydroxide, depending on what type of electrode material is being used. The metal hydroxides cause the precipitates to agglomerate and form a solid mass that will then separate from the liquid either through sedimentation or basic filtration. In essence, Electrocoagulation generates it's own chemicals that are proven to be much more effective than traditional chemicals.
The following removal results have been compiled from various field trials performed using Electrocoagulation. The removal percentages below represent average results of various contaminants from a wide range of industrial wastewaters.
Contaminant Typical % Removal
Aluminum 99 COD 50 to 99 Nickel 98+ Arsenic 98
Nitrate as N 50 to 90 Barium 94+ Oil & Grease 99+ Bacteria 99+
Phosphates 75 to 99 BOD 30 to 99 Silicon 75 to 99 Chromium 99
Strontium 50 Color - Dye 98+ Silver 99 COD 50 to 99
Tin 95 Copper 99+ TKN 38 to 98 Cyanide 95+
TOC 98+ Iron 99+ TSS 95+ Lead 98+
Vanadium 98+ Magnesium 98+ Zinc 99+ Manganese 95
What It Won't Treat
While Electrocoagulation is effective for treating a variety of contaminants, there are certain contaminants that cannot be treated with this process. Dissolved organics are not effectively removed using this process. Contaminants such as Glycol, Sodium Salts, Sugar and Alcohol cannot be removed. Boron, ammonia, and mercury are typically removed to only 60%.
Quality Systems offers aqueous parts cleaning systems. We also offer waste water treatments.
Please visit our website.
Comments
This is what happens in ozone which is a good way to disinfect. It will not pull the solids out as effectly.
Will the use of Ozone pre-coagulation aid in the removal of dissolved organics?
What about having two electro-coagulation stages with an ozone intermediate stage?
very nice work i am working on electrocoagulation in my research to get the master degree
thanks
Plymouth Technology can help with Zinc removal.
www.plymouthtechnology.com
248-537-0081
Plymouth Technology has a long history serving the zinc phosphating industry for the treatment of rinsewaters and concentrated solutions associated with zinc phosphating. Plymouth Technology offers proprietary products and services to treat chelated nickel and zinc-contaminated wastewater, promotes advanced treatment technology to maximize system efficiency, and delivers tremendous expertise for this industry's specific treatment challenges.
w provide small EC to help companies decide to install larger plants like those made by Quality Systems. The small test plants treats 10M3 per hr and cost only USD90,000
someonewhoknows 2 years ago
why not use non magnetic stainless steel electrodes to split water into hydrogen and oxygen and use the oxygen to oxidize cantaminented water and seperate and use the hydrogen gas for another useful purpose?