Electrocoagulation

Our technology is based on electrocoagulation (EC), in which different components present within water/wastewater can be separated from it. This is achieved by placing an anode and a cathode near to each other within a volume of solution, and then applying an electric current between these two electrodes in the volume of the aqueous solution. The electrodes are typically metal plates made from aluminium, iron or stainless steel. The anode material will dissolve into the solution, and these metal cations will then act as coagulation agents. This leads to an agglomeration process, where the suspended matter will form larger particles, i.e. agglomerated pieces of matter commonly called flocs.

In addition to the anodic reactions, hydroxide ions (OH-) and microbubbles of hydrogen (H2) are simultaneously released at the cathode. These H2 bubbles will adhere to the agglomerates/flocs and help them to rise to the surface of the liquid from where they may be easily removed mechanically (or by some other means). In some cases the EC floc is so heavy that it will settle at the bottom of the EC vessel instead. EC will also neutralize the pH of the treated water/wastewater, mainly due to the electrogenerated OH- ions. In the end, the resulting EC-treated solution (supernatant) will have a substantially reduced contaminant concentration.