CPC C02F 1/444 (2013.01) [B01D 29/52 (2013.01); B01D 29/66 (2013.01); B01D 61/025 (2013.01); B01D 61/145 (2013.01); B01D 61/16 (2013.01); B01D 61/58 (2013.01); B01D 65/02 (2013.01); C02F 1/004 (2013.01); C02F 1/441 (2013.01); B01D 61/08 (2013.01); B01D 61/18 (2013.01); B01D 2201/202 (2013.01); B01D 2311/2649 (2013.01); B01D 2313/20 (2013.01); B01D 2313/246 (2013.01); B01D 2313/54 (2013.01); B01D 2317/025 (2013.01); B01D 2317/04 (2013.01); B01D 2317/06 (2013.01); B01D 2321/04 (2013.01); B01D 2321/12 (2013.01); B01D 2321/14 (2013.01); B01D 2321/16 (2013.01); B01D 2321/20 (2013.01); C02F 2103/08 (2013.01); C02F 2303/16 (2013.01); Y02A 20/131 (2018.01)] | 15 Claims |
1. A method comprising:
passing water through a reverse osmosis process;
backwashing a first set of ultrafiltration membranes or a second set of ultrafiltration membranes with brine generated by the reverse osmosis process; and
backwashing at least one of the first set of ultrafiltration membranes or the second set of ultrafiltration membranes with one or more chemicals and reverse osmosis permeate,
wherein the brine generated from the reverse osmosis process is directly communicated, through an energy recovery device, to a backwash inlet of a backwashing system of the first set of ultrafiltration membranes.
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