Electro-Coagulation / Electro-Precipitation

The Science

Electro-Precipitation and Electrocoagulation utilize a low voltage, direct current to sacrifice ions (Fe/Al) into solution while simultaneously liberating Hydrogen and Oxygen gas. Both dissolved and suspended contaminates react with the sacrificial ions, gases and their byproducts such that they are Co-Precipitated from solution and may be subsequently removed by typical liquid-solids separation technologies that include gravity settlement, flotation or filtration. The process also provides for the simultaneous reduction and precipitation of multivalent species such as Hexavalent Chrome, Arsenic, Selenium, Vanadium, etc.

Electrocoagulation

Treatment Targets

  • Heavy Metals (Total and Dissolved)
  • Mixed Metals (RCRA Metals)
  • Multivalent Metals that require Reduction (As, Se, Cr, V)
  • Fats, Oils & Grease / Soluble Hydrocarbons (BTEX/TPH)
  • Suspended Solids / Colloidal Particulates
  • Sulfides / H2S
  • Bacteria (SRB / Aerobic / Lactic Acid)
  • Biological Oxygen Demand (BOD)
  • Chemical Oxygen Demand (COD)
  • PFOS / PFOA
  • Flouride
  • Silica
  • Total Organic Carbon (TOC)
  • Volatile Organic Compounds (VOC) / BTEX
Electrocoagulation

What Is Replaced or Minimized?

  • Coagulants
  • Precipitants
  • pH Adjustment Chemicals
  • Flocculants

Benefits and Advantages Replacing Hazardous Chemicals

Electrocoagulation is the treatment method of choice because of the many benefits and advantages over typical chemical systems, including:

  • Reduces Operating and Maintenance Costs up to 20 times versus the use of chemicals for treating wastewater
  • Is much safer than handling chemicals inside of your facility.
  • No Segregation of Wastes Streams / Process Removes multiple contaminants in a single unit process
  • Waste Residuals are decreased up to 75% Minimizing Transportation / Disposal Costs and Associated Liabilities
  • Residuals pass USEPA TCLP as Non-Haz.
  • Easily retrofits into existing infrastructure, so the E-FLOC® technology can be placed in the middle of a chemical system. All the same components of a chemical system are used, but the technology replaces the use of these chemicals for treating wastewater.  Since this technology is the smallest footprint per flow on the market, not much space is needed.  
  • Does not increase dissolved solids, minimizing tertiary polishing O & M costs. Chemical precipitation and coagulation actually increase dissolved solids resulting in fouling and failure of tertiary polishing systems.
  • Removes metals in the presence of high concentrations of organics; chemical treatment does not.