High-salinity wastewater treatment is shifting from relying solely on end-of-pipe evaporation to coordinated assessment of segregated collection, front-end reduction, and resource destinations.
Background
Complex mixed salts, COD, hardness, and water quality fluctuations can increase the load on end-of-pipe evaporation and crystallization. More projects are moving segregated collection and resource recovery assessment upstream.
Engineering focus
- First distinguish reusable water, usable salts, and mother liquor that must be disposed of.
- Check ion composition, organics, scaling, and material compatibility risks at the same time.
- Avoid selecting equipment based only on total salt content while overlooking product destinations.
Project recommendations
Confirm the boundaries for concentration, salt separation, and reuse through water quality review, bench-scale testing, or pilot-scale testing, then decide the combination of ED, NF, MVR, and crystallization units.