Arvia Technology is an English company, founded in 2007 by a spin-out from the School of Chemical Engineering and Analytical Science at the University of Manchester, which carried out research in the field of nuclear industry. Since 2017, the core business of the company has been essentially aimed to tertiary industrial applications, i.e. the polishing stages of wastewater which had already been pre-treated with other technologies, but that required the removal of specific pollutants, or emerging pollutants, which could otherwise not be reduced , such as antibiotics, benzodiazepines, pesticides, refractory COD and color. The technology is based on the combination of an electric field in the presence of a cathode, consisting of a series of lamellar electrodes, and an anode coated by an absorbent medium of a particular patented material called Nyex. Nyex is a in a non-porous form of activated carbon, with excellent conductivity properties, which constitutes the cells of the anode. This special material at the base of Arvia’s technology features combines rapid absorption capacity and simultaneous electrochemical regeneration property that achieves 100% efficiency. The applied electric field causes the electrochemical oxidation of the pollutants absorbed on the surface of the absorbent material, which is continuously regenerated during the process.
Nyex-a is Arvia’s technological solution where the chemical electro-oxidation process is used as a tertiary polishing treatment stage for industrial wastewater plant. Under these conditions, in order to enphatize the oxidizing capacity of the system, the electro-oxidation takes place in the presence of an absorbent medium.
Nyex-e is Arvia’s technological solution based exclusively on chemical electro-oxidation obtained by applying a weak electric field between the Nyex-e electrodes thus generating the hydroxyl radical OH– capable of oxidizing the polluting macromolecules present in the wastewater to be treated and breaking them down into H2O , O2 and CO2.
Given the great variety of macromolecules that are part of the recalcitrant COD of an industrial wastewater stream, it is very often necessary to conduct a pilot test on the field to determine which Nyex solution to adopt (Nyex-a or Nyex-e), to extimate the electrical costs associated with the chemical electro-oxidation reaction ( kWh / kgCOD removed) and the connected investment budget for the full-scale solution.