This project tests the capability of a two-stage reverse osmosis (RO)/electrodialysis (ED) process
to achieve high recovery (95 percent) for membrane desalination of Colorado River water. In
order to overcome the high-energy consumption of ED membranes at elevated salinity levels,
Lawrence Livermore National Laboratory has recently developed low-resistivity nanoporous ED
membranes. The nanoporous ED membranes have pore sizes ranging from 6 to 16 nm, resulting
in ion "double-layer overlap" inside the ED pores. The double-layer overlap allows for
preferential rejection of targeted solutes by modifying the ED membrane pore size for a given
ionic strength. This paper discusses how nanoporous ED membranes can be used to
recover concentrate that is supersaturated with respect to various salts from a primary RO unit. Includes 5 references, figures.
| Edition : | Vol. - No. |
| File Size : | 1
file
, 700 KB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 6 |
| Published : | 03/01/2007 |
