ZDD is a desalination technology unparalleled in its ability to achieve high water recovery and thus sustain water resources
ZDD is a new desalination technology that achieves higher water recovery than any alternative available in the marketplace. ZDD is ideal for
- inland brackish groundwater treatment for potable water uses
- retrofiting existing RO systems for improved recovery rate and
- plant capacity expansion as end-of-pipe add-on
ZDD can be applied to reduce or eliminate the need for more costly disposal options such as deep well injection, large evaporation ponds, or waste hauling.
ZDD technology utilizes a combination of separation processes, including an electrodialysis device in an ion substitution mode, to remove divalent salts from water. When high silica levels are present in the concentrate stream, a secondary membrane system is added to control the silica.
ZDD can be added on to any existing RO plant producing potable water from a brackish well. ZDD increases the potable water recovery rate from the typical 80% to as high as 97%.
With a ZDD retrofit, treatment capacity is expanded and brine generation is diminished, which may solve your permitting problems. Peripheral processes can also be added to recover calcium sulfate and sodium chloride.
