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Powell Water – The Electrocoagulation Process
Electrocoagulation (EC) is a process that has been in existence for decades with the first patent issued in 1906. However, it has been only recently that the process has been fully commercialized as a result of technical advancements specific to overcoming the deficiencies of previous units.
30 gpm EC Power Supply and Chamber
Electrocoagulation (EC) will significantly reduce BOD, TSS, TKN, phosphate, silica, heavy metals, and other contaminants from aqueous solutions. With the use of clean electricity, electrocoagulation efficiently removes a wide range of contaminants with a single system. The EC makes constituents in the water “separable”. Heavy metals are converted from ion forms to oxide forms, allowing them to be disposed in a non-hazardous landfill. Because electrocoagulation utilizes methods that precipitate out large quantities of contaminants in one operation, the technology is the distinct economical and environmental choice for industrial, commercial and municipal waste treatment. The capital and operating costs are usually significantly less than chemical coagulation.
30 gpm EC Chamber with Metal
Blades Prior to Wastewater Flow
Powell Water is the industry leader and the world’s largest supplier of industrial electrocoagulation (EC) systems has more than 150 installations worldwide. The EC chamber consists of flat metal blades placed parallel to each other. Untreated water is introduced into the bottom of the chamber and is dispersed evenly as it moves upward through the blades. Direct current is applied to the first and last blade. The liquid then becomes a conductor, allowing the current to pass freely throughout the chamber. This results in a flood of electrons into the water, neutralizing charged particles, causing them to precipitate out of solution. In addition, the metal blades react to the current by releasing charged metal ions that act similar to chemical coagulants. The unit also contains an automated clean-in-place (CIP) system and an air purge system that fluidizes precipitates and reverses polarity in order to extend metal blade life and prevent contaminants from coating the blades. No chemicals are required for the treatment process. The acid solution used in the automated cleaning cycle is recycled and, when exhausted, is routed through the EC system for final disposal. EC has become recognized as a very effective means for economically treating a wide variety of challenging water treatment applications and are available in sizes ranging from 1 gpm to multiples of 2,500 gpm.
EC - Effective, Economical Wastewater Treatment