Assisted-Reverse Electrodialysis (A-RED) technology was applied following reverse osmosis (RO) of a surface water resource in order to recover minerals from its brine and directly remineralize the RO unit's permeate. Four different sets of cation/anion exchange membranes were benchmarked using single- and mixed-salts synthetic solutions as well as real brine and permeate streams produced from three-stage reverse osmosis applied to Seine River water. The process, operating under equal permeate and brine channel flows (2 cm/s velocities) and applied voltage varying from 0 to 10 V, showed viable remineralization results. Optimal recovery at 10 V applied allowed increasing permeate mineral content from 20 mg/L CaCO3 up to values of 553 mg/L CaCO3 and from 100 μS/cm up to 1284 μS/cm for hardness and conductivity respectively. Tests using spiked micropollutants showed very low levels of micropollutant passage with over 98% rejection for 15 out of 18 compounds tested while natural organic matter (NOM) breakthrough was 2% on average (0.2 mg C/L).

Marc Philibert, Antonia Filingeri, Carmelo Natalello, Neil Moe, Emmanuelle Filloux, Andrea Cipollina (2022). Surface water RO permeate remineralization through minerals recovery from brines. DESALINATION, 531 [10.1016/j.desal.2022.115725].

Surface water RO permeate remineralization through minerals recovery from brines

Antonia Filingeri;Carmelo Natalello;Andrea Cipollina
Writing – Original Draft Preparation
2022

Abstract

Assisted-Reverse Electrodialysis (A-RED) technology was applied following reverse osmosis (RO) of a surface water resource in order to recover minerals from its brine and directly remineralize the RO unit's permeate. Four different sets of cation/anion exchange membranes were benchmarked using single- and mixed-salts synthetic solutions as well as real brine and permeate streams produced from three-stage reverse osmosis applied to Seine River water. The process, operating under equal permeate and brine channel flows (2 cm/s velocities) and applied voltage varying from 0 to 10 V, showed viable remineralization results. Optimal recovery at 10 V applied allowed increasing permeate mineral content from 20 mg/L CaCO3 up to values of 553 mg/L CaCO3 and from 100 μS/cm up to 1284 μS/cm for hardness and conductivity respectively. Tests using spiked micropollutants showed very low levels of micropollutant passage with over 98% rejection for 15 out of 18 compounds tested while natural organic matter (NOM) breakthrough was 2% on average (0.2 mg C/L).
Marc Philibert, Antonia Filingeri, Carmelo Natalello, Neil Moe, Emmanuelle Filloux, Andrea Cipollina (2022). Surface water RO permeate remineralization through minerals recovery from brines. DESALINATION, 531 [10.1016/j.desal.2022.115725].
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10447/565787
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