Our unique, renewable powered treatment units have the potential to deliver a product completely new to the water treatment industry, our innovative step within the field of electrocoagulation enables us to remove the need for a standard electrode completely, our reaction chambers self-calibrate to replenish lost material and ensure prolonged operation-something not achievable with the standard methods. and we will aid the delivery of an environmental and economical recourse that aims to save the people-and the planet.
Electrocoagulation Technology is the process of destabilising suspended, emulsified or dissolved contaminants in an aqueous medium by introducing an electrical current into the medium. The electrical current provides the electromotive force to drive the chemical reactions. When reactions are driven or forced, the elements or compounds will approach the most stable state. Generally, this state of stability produces a solid that is either less colloidal and less emulsified (or soluble) than the compound at equilibrium values. As this occurs, the contaminants form hydrophobic entities that precipitate out and can be easily removed by a number of secondary separation techniques. Stated another way:
"Electrocoagulation Technology utilises direct current to cause sacrificial electrode ions to remove undesirable contaminants either by chemical reaction and precipitation or by causing colloidal materials to coalesce and then be removed by electrolytic flotation. The electrochemical system has proven to be able to cope with a variety of wastewaters. These waters are paper pulp mill waste, metal plating, tanneries, canning factories, steel mill effluent, slaughterhouses, chromate, lead and mercury-laden effluents, as well as domestic sewage. These wastewaters will be reduced to clear, clean, odourless and reusable water. In most cases, more especially domestic sewage, the treated water effluent will be better than the raw water from which it had originated.”
With our patented design the electrical current is introduced into water via parallel walls of the chamber; which are bars constructed of various metals that are selected to optimise the removal process. The two most common bar materials are iron and aluminium. In accordance with Faraday’s Law, metal ions will be split off or sacrificed into the liquid medium. These metal ions tend to form metal oxides that electromechanically attract to the contaminants that have been destabilised.
Electrocoagulation (EC) has proven very effective in the removal of contaminants from water. Electrocoagulation systems have been in existence for many years (Dieterich, patented 1906), using a variety of anode and cathode geometries, including plates, balls, fluidized bed spheres, wire mesh, rods, and tubes. F&T Water Solutions technology has taken a quantum leap in refining the EC process to increase removal rates and to lower capital and operating costs.
Coagulation is one of the most important physio-chemical operations used in water treatment. This is a process used to cause the destabilisation and aggregation of smaller particles into larger particles. Water contaminants such as ions (heavy metals) and colloids (organics and inorganics) are primarily held in solution by electrical charges. Schulze, in 1882, showed that colloidal systems could be destabilised by the addition of ions having a charge opposite to that of the colloid (Benefield et al., 1982). The destabilised colloids can be aggregated and subsequently removed by sedimentation and/or filtration.
Coagulation can be achieved by chemical or electrical means. Chemical coagulation is becoming less acceptable today because of the higher costs associated with chemical treatments (e. g. the large volumes of sludge generated, and the hazardous waste categorisation of metal hydroxides, to say nothing of the costs of the chemicals required to effect coagulation).
Chemical coagulation has been used for decades to destabilise suspensions and to effect precipitation of soluble metal species, as well as other inorganic species from aqueous streams, thereby permitting their removal through sedimentation or filtration. Alum, lime, and/or polymers have been the chemical coagulants used. These processes, however, tend to generate large volumes of sludge with high bound water content that can be slow to filter and difficult to dewater. These treatment processes also tend to increase the total dissolved solids content of the effluent, making it unacceptable for reuse within industrial applications.”
Electrocoagulation can often neutralise ion and particle charges, thereby allowing contaminants to precipitate, reducing the concentration below that possible with chemical precipitation, and can reduce or replace the use of expensive chemical agents (metal salts, polymer).
Although the electrocoagulation mechanism resembles chemical coagulation in that the cationic species are responsible for the neutralisation of surface charges, the characteristics of the electrocoagulated floc differ dramatically from those generated by chemical coagulation. An electrocoagulated floc tends to contain less bound water, is more shear resistant, and is more readily filterable.