Abstract: The present invention discloses a portable electrodialysis unit powered by photovoltaic panels for treating brackish/saline water and produce potable water for consumption. Potable water is important in water-scarce regions or circumstances, such as desert, drought, military operations, or natural disasters. The present invention provides a photovoltaic powered desalination system capable of dynamically changing salt removal rate and product water flow rate in order to fully utilize solar energy captured by the photovoltaic panels. The invention includes a direct electric current provided by one or more photovoltaic panels that charges batteries and provide an steady electric current to an electrodialysis desalinization unit and a control unit. The control unit communicates with the photovoltaic panels and electrodialysis unit, in conjunction with sensors to monitor water flow, conductivity, pressure, water elevation levels, and/or temperature, to create a closed loop feedback system.

Abstract: A process and apparatus treat brackish or non-brackish waters containing an oxidant such as perchlorate. The feed water is converted into a treated water stream and a concentrate stream in an ED, EDR, NF or RO unit. The concentrate passes through an IX resin. The IX resin removes oxidant from the concentrate stream to produce a second treated water stream. The IX resin is periodically regenerated, for example biologically in a fluidised bed reactor in regeneration system. Concentrate that has passed through the IX resin has a reduced concentration of oxidant, preferably a concentration safe for discharge or use. In the case of a brackish feed water, the second treated water stream may be desalted.