Integrated Ferritisation Treatment for Concentrated Wastewater of Electroplating Production

Sewage from electroplating industries as well as waste after water treatment is especially dangerous for environment due to the high content of toxic heavy metal compounds. The paper presents novel technology that allows reducing initial concentrations of heavy metal ions in electroplating production wastewater from 25 g/dm3 to less than 0.7 mg/dm3. Proposed process of integrated wastewater treatment consists of two innovative methods: energy-efficient ferritisation with activation by electromagnetic pulse discharges instead of expansive thermal one as well as advance sorption treatment by suspensions containing new nanosorbents of polyvalent iron oxides obtained by electroerosion dispersion. This technology of water purification allows to meet requirements of current Ukrainian standards for water reuse in electroplating production. Structural studies of the treatment-generated waste have shown significant content of ferrite phases with magnetic properties and high potential for further utilisation. In contrast to traditional technologies, developed comprehensive process for treatment of liquid waste flows would ensure rational use of water and energy inputs in the system of industrial production.