Voltek’s forward osmosis system improves the energy efficiency of reverse osmosis by effectively pretreating feedwater for impurities and algal blooms, without adding foreign chemicals such as biocides, scale and corrosion inhibitors into the environment.
Voltek’s FO system pretreats feedwater containing high organics like tropical seawater or water from an anaerobic digester. A non-fouling, high osmotic pressure brine solution draws feedwater through a membrane, thereby diluting the brine. This pretreated brine is then fed into a high pressure RO system with a high recovery rate, generating pure water while the brine is sent back to the FO system in a closed loop. The waste from this system consists only of the organic and inorganic constituents of the feedwater, in a concentrated form.
Voltek’s Forward Osmosis system makes it affordable to convert sewage and industrial waste streams to biogas, including textile dyeing wastes, tannery wastes, and food waste. The system removes water from waste streams and concentrates organic fractions without destroying them. The resulting concentrate significantly improves the effectiveness of anaerobic digestion systems for converting organic waste to biogas.