A new process for resourse recovery from surface water RO brine from permeate remineralization

Low-Pressure Reverse Osmosis (LPRO) membranes could be valuable alternatives to conventional surface water potabilization processes [1] thanks to a combined ability to: remove micropollutants, soften, disinfect and remove organic substances. However, these processes produce an aggressive permeate and a concentrated brine with discharge constraints [2]. Assisted Reverse Electrodialysis (A-RED, [3]) was tested for LPRO permeate remineralization by recovery of target minerals from the corresponding LPRO brine while maintaining the product water’s integrity with respect to the organic compounds present in the concentrate. Bench-scale experiments were carried out with SUEZ-WTS membranes (CR67T-A…