System and methods for concentrating dissolved solids in an aqueous solution
AssigneeSaudi Water Authority
InventorsSheng LI, Sangho LEE, Ahmed ALAMOUDI, Eslam ALWAZNANI, Ghulam MUSTAFA
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Abstract
System and process for concentrating dissolved solids in an aqueous solution. The system contains a first nanofiltration unit, a second nanofiltration unit in fluid communication with the first nanofiltration unit, and a reverse osmosis unit. Each nanofiltration unit may contain a plurality of nanofiltration membranes. The plurality of nanofiltration membranes may include a first nanofiltration membrane located upstream from a second nanofiltration unit where the first nanofiltration membrane has a higher salt rejection and higher water rejection rate than the second nanofiltration unit.
Claims20
A system for concentrating dissolved solids in an aqueous solution, the system comprising:
- a first nanofiltration unit comprising a first nanofiltration membrane, a first feed inlet in fluid communication with an aqueous solution source comprising a brine, a first concentrate outlet, and a first permeate outlet;
- a second nanofiltration unit comprising a second nanofiltration membrane, a second feed inlet in fluid communication with the first concentrate outlet, a second concentrate outlet, and a second permeate outlet;
- and
- a reverse osmosis unit comprising a reverse osmosis membrane, a reverse osmosis feed inlet in fluid communication with the second concentrate outlet, a reverse osmosis concentrate outlet, and a reverse osmosis permeate outlet.
Dependencies are inferred from the claim text.