Results of studying chemical treatment of the nanofiltration unit concentrate

Summary

The results of industrial studies on chemical treatment of concentrate from a single-stage four-cascade nanofiltration unit are presented. The change in the cation-anion composition of the concentrate as a result of treatment with chemicals, including antiscalant. The studies of the chemical treatment of the fourth cascade nanofiltration concentrate by the lime-soda method conducted under industrial conditions showed the possibility of its effective application in principle. It has been experimentally confirmed that the introduction of an antiscalant upstream the nanofiltration units has a positive effect on the subsequent chemical treatment of the concentrate by the lime-soda method.

Key words

softening , desalination , domestic water supply , four-cascade nanofiltration unit , baromembrane separation of liquid