SELECTION OF MEMBRANE PROCESSES

Define separation goal (such as, minimum rejection required

for key components, quality of permeate and/or retentate, desired water recovery,etc.)

Type of species to be retained or permeated and the variability of feed concentrations

Potential fouling and/or precipitating components

Major component (such as, water) vs. minor component (such as, organics and heavy metals) permeation

Process flexibility and integration with other treatment steps

Need to know transport/selectivity mechanisms and driving force

Question: Would you consider using RO for

removing dilute hazardous organics

from a 20% NaCl solution?