Electrocoagulation, the passing of the electrical current through water, has proven very
effective in the removal of contaminants from water. Electrocoagulation systems have been
in existence for many years using a variety of anode and cathode geometries, such as plates,
balls, fluidised bed spheres, wire mesh, rods, and tubes. Although the electrocoagulation
mechanism resembles the chemical coagulation – the cationic species being responsible for
the neutralisation of surface charges – in many ways it is very different. Electrocoagulation is
a process of destabilising suspended, emulsified or dissolved contaminants in an aqueous
medium by introducing electrical current into the medium. The electrical current provides the
electromotive force causing the chemical reactions.
