Wastewater treatment

Why RO? Wouldn't a membrane bioreactor [MBR] installation be a more appropriate solution? And what happens to the dioxin-laden sludge?

HCl has a high affinity for water, so the risk of carry-over in the evaporator is low. One way to minimise the risk would be to apply pH correction by proportionally dosing alkali.

Be afraid of free chlorine near membranes. Be very afraid. One way of eliminating it is to dose sodium metabisulphite upstream, static-mix, monitor ORP upstream and dump any water that contains free chlorine.

Also, advise the suppliers of the levels of impurities, then ask for process guarantees to achieve the required discharge consent limits, and see what happens.

Hello,

a nice coctail you have - I propose because of that you should complete your selected solution (whatever that might be at last) with a UV wet oxidation stage.
In which country are you ?

Regards Uwe

You are right. The vacuum still will cause dissolved volatile solvents to carry over with the water. However, the solvent vapors will be released into the atmosphere, so it's not advisable to do this unless you have a means of removing the fumes e.g. an activated carbon filter. Dissolved organics can also be destroyed by oxidation and UV light in the 185 nm spectrum. HCl should best be neutralized with NaOH to form NaCl and water. The RO process can then easily remove it.