High-TDS Brine, RO Reject & ZLD
Concentrate High-Salinity Wastewater and Progress Toward ZLD
Customized vacuum evaporation and scraped crystallization for RO reject, regeneration wastewater, process brines and mixed-salt industrial streams.
Why This Wastewater Is Difficult
Recommended Treatment Approach
Pretreatment is selected to control hardness, silica, suspended solids and organics. Vacuum evaporation recovers distillate and concentrates the brine. When the feed approaches saturation, a scraped crystallizer may be used to manage deposits and produce a slurry or high-solids discharge. Solid-liquid separation and distillate polishing are added when required.
Suitable Applications and Important Limits
Typical candidates include RO concentrate, ion-exchange regeneration wastewater, chemical brines and evaporator concentrate. Crystallization behaviour and final moisture cannot be predicted reliably from TDS alone; representative testing is recommended.
Actual volume reduction, energy use, distillate quality and concentrate condition depend on feed composition and operating conditions. Local reuse or discharge requirements must be confirmed for each project.
Technology Options
Low-Temperature Vacuum Evaporation — wastewater minimization and distillate recovery.
Scraped Vacuum Crystallization — further concentration of scaling, viscous or crystallizing feeds.
Integrated ZLD — pretreatment, evaporation, crystallization, separation and polishing as required.
Information Needed for Evaluation
Full cation and anion balance, TDS, COD/TOC, pH, alkalinity, hardness, silica, fluoride, ammonia, density, daily volume and required water or solids endpoint.
For complex or variable wastewater, GRELLIX recommends a representative sample and bench or pilot testing before final equipment selection.
Tell Us About Your Wastewater
Upload your analysis, daily capacity and treatment objective for a preliminary engineering review. Your process information will be used only for technical evaluation.