Hybrid Desalination Systems

Hybrid processes consisting of electrodialysis (ED) and reverse osmosis (RO) or ED, RO, and distillation offer many advantages over traditional stand-alone applications of these technologies for desalination. Hybrid process configurations allow:

In addition, coupling of other processes with RO also offers a solution to an increasingly important issue: disposal of concentrate generated by RO. This highly concentrated brine can be difficult to dispose, especially at inland desalination plants. Recycle of the concentrate to the ED cells, as well as use of distillation, can greatly reduce the quantities of concentrated brine that must be managed. The most efficient and economical hybrid processes involving ED, RO, and distillation depend on the feed and the final product quality required. Since limited data on these types of hybrid systems are available, selection, evaluation, and optimization are best performed using bench or pilot scale testing on the feed stream of interest.

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