RO + MEE ZLD Image
RO + MEE Zero Liquid Discharge System
Membrane recovery followed by multi-effect evaporation to concentrate RO reject and recover reusable condensate from high-TDS industrial wastewater.
ZERO LIQUID DISCHARGE SOLUTIONS
Zero Liquid Discharge
System for Industrial
Wastewater Recovery
WTE Zero Liquid Discharge System solutions are engineered to recover maximum water from industrial effluent, RO reject, high-TDS wastewater, and process streams through pretreatment, membrane recovery, evaporation, crystallization, drying, condensate polishing, and salt handling.
ZLD Plant View
Complete Zero Liquid Discharge System Process Overview
View the complete Zero Liquid Discharge System process from pretreatment and membrane recovery to evaporation, crystallization, drying, condensate reuse, and salt handling.
Engineered Industrial Zero Liquid Discharge System
Industrial effluent is stabilized through equalization, pH correction, chemical dosing, clarification, filtration, and membrane pretreatment for reliable ZLD operation.
Recovered permeate and evaporator condensate are reused in utilities, while concentrated brine is converted into manageable solids for zero liquid discharge compliance.
Effluent / RO Reject InletHigh-TDS effluent or RO reject enters equalization for flow balancing, pH control, and stable feed quality.
Pretreatment & RO RecoveryClarification, filtration, UF, RO, and high-pressure RO recover water before thermal concentration.
MEE / Crystallizer ZoneBrine is concentrated through MEE or crystallization to separate recoverable water from dissolved salts.
Recovered Water OutletRO permeate and condensate are polished for reuse, while salts or sludge are collected for safe handling.
Equalization TankEffluent feed balancing
RO + MEE SectionRecovery and concentration
PLC Control PanelAutomated ZLD operation
Salt / Sludge HandlingDry solid management
ZLD Plant View
Overview
What Is a Zero Liquid Discharge System?
A Zero Liquid Discharge System is an industrial wastewater recovery solution designed to eliminate liquid effluent discharge. WTE engineers ZLD plants for high-TDS wastewater, RO reject, brine streams, condensate reuse, and controlled salt handling.
For reliable zero discharge, WTE integrates pretreatment, UF/RO, high-pressure RO, MEE, crystallizer, ATFD, condensate polishing, and reuse systems. The design is selected after evaluating effluent chemistry, TDS load, scaling risk, utilities, and compliance needs.
High Water RecoveryZero Discharge ComplianceRO Reject ManagementSalt Recovery Support
ZLD System Highlights
Designed around effluent chemistry, TDS load, recovery target, brine behavior, utility cost, and compliance requirements
WTE reviews effluent flow, TDS, COD, hardness, silica, chlorides, sulfates, scaling tendency, RO reject quality, steam availability, condensate reuse, and salt disposal strategy before designing the Zero Liquid Discharge System.
24/7Continuous ZLD Operation
LowLiquid Discharge Target
PLCRO, MEE & ATFD Automation
CustomZLD Recovery Design
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Systems We Offer
Zero Liquid Discharge System Configurations
Select membrane-based, evaporator-based, crystallizer-based, or hybrid ZLD systems based on TDS load, RO reject volume, scaling risk, recovery target, steam availability, and site utilities.
MEE + ATFD Image
MEE + ATFD ZLD Plant
Thermal evaporation with agitated thin film drying converts concentrated brine into dry solids while recovering condensate for reuse.
Crystallizer ZLD Image
Crystallizer-Based ZLD System
Forced circulation evaporation and crystallization support controlled salt separation in high-salinity and scaling wastewater streams.
Skid-Mounted ZLD Image
Skid-Mounted / Modular ZLD System
Modular ZLD packages combine pretreatment, RO, evaporation, condensate handling, dosing, instrumentation, and automation for faster installation.
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Key Benefits
Zero Liquid Discharge System Benefits for Industrial Operations
A properly designed Zero Liquid Discharge System reduces freshwater intake, eliminates liquid effluent discharge, recovers reusable water, controls brine disposal, and supports long-term compliance.
Maximum Water RecoveryMulti-stage RO, high-pressure RO, evaporation, and condensate polishing recover water from effluent and RO reject streams for reuse.
Lower Freshwater DemandRecovered RO permeate and evaporator condensate can be reused for cooling tower make-up, boiler feed support, washing, utilities, and process applications.
Brine Volume ReductionBrine concentrators, MEE, ATFD, and crystallizers reduce liquid reject volume and convert dissolved solids into manageable salt or sludge.
Automatic OperationPLC-based automation controls pumps, dosing, RO skids, evaporator feed, steam valves, vacuum systems, condensate transfer, alarms, and interlocks.
Modular Expandable DesignSkid-mounted pretreatment, membrane, evaporation, and drying modules can be engineered for phased capacity expansion and site-specific utilities.
Compliance SupportSystem design considers inlet chemistry, TDS load, scaling index, hardness, silica, chlorides, COD, pH, reject volume, salt disposal, and zero discharge norms.
Working Process
How a Zero Liquid Discharge System Works
The Zero Liquid Discharge System uses pretreatment, membrane recovery, brine concentration, evaporation, crystallization, drying, and condensate polishing to recover water and eliminate liquid discharge.
1
Equalization & Chemical Pretreatment
Effluent is collected, equalized, pH-corrected, dosed, clarified, and filtered to reduce TSS, hardness, silica, oil, and scaling impurities.
2
Membrane Recovery
Ultrafiltration, RO, and high-pressure RO recover reusable water and reduce reject volume before thermal concentration.
3
Brine Concentration & Evaporation
RO reject or high-TDS brine is concentrated in brine concentrators, multi-effect evaporators, or forced circulation evaporators.
4
Crystallization, Drying & Reuse
Concentrated slurry is processed through crystallizers or ATFD dryers; condensate is polished for reuse and solids are handled safely.
Applications
Zero Liquid Discharge System Applications by Industry
Used where high-TDS wastewater, RO reject, process effluent, brine streams, and strict discharge norms require maximum water recovery and zero liquid discharge compliance.
Textile & Dyeing IndustriesPharmaceutical ManufacturingChemical & Specialty ChemicalsFood & Beverage ProcessingPower Plants & Boiler UtilitiesAutomobile & Engineering UnitsSteel, Metal & Surface TreatmentCommon Effluent Treatment Plants
Project Gallery
Zero Liquid Discharge System Installation Views
Showcase Zero Liquid Discharge System installations including pretreatment skids, RO systems, brine concentrators, MEE plants, condensate tanks, crystallizers, ATFD units, and salt handling areas.
Gallery Image 1
Equalization, pH correction, and chemical dosing arrangementGallery Image 2
UF/RO membrane recovery and high-pressure pump skidGallery Image 3
Multi-effect evaporator and brine concentration sectionGallery Image 4
Crystallizer circulation and salt slurry handling systemGallery Image 5
ATFD dryer, condensate recovery, and vacuum systemGallery Image 6
Commissioned ZLD plant with recovered water reuse lineApplications & Selection
How This Zero Liquid Discharge System Improves Wastewater Recovery
This Zero Liquid Discharge System is designed for facilities needing high water recovery, RO reject management, brine minimization, salt separation, and compliant zero discharge operation.
Typical Zero Liquid Discharge System Applications
WTE recommends the correct ZLD configuration after reviewing effluent flow, TDS profile, reject quantity, scaling risk, recovery target, utilities, and salt disposal plan.
- • High-TDS effluent treatment for textile, pharma, chemical, food, power, metal, and engineering industries
- • RO reject concentration, brine minimization, condensate recovery, and salt separation
- • Recovered water reuse for cooling towers, boiler feed support, washing, utilities, and process recycling
- • Integrated with ETP, tertiary treatment, UF/RO, high-pressure RO, MEE, crystallizer, ATFD, and condensate polishing systems
What We Review Before Recommending a ZLD System
WTE studies wastewater chemistry, daily and peak flow, TDS, COD, hardness, silica, chloride levels, scaling tendency, utility availability, recovery target, and compliance requirement before recommending a ZLD system.
- • Average and peak effluent flow, RO reject volume, TDS profile, and seasonal variation
- • COD, TSS, pH, hardness, silica, alkalinity, chlorides, sulfates, oil & grease, and scaling tendency
- • Technology selection: UF/RO, high-recovery RO, brine concentrator, MEE, forced circulation evaporator, crystallizer, or ATFD
- • Recovery target, condensate quality, salt handling method, steam availability, power consumption, footprint, automation level, and O&M strategy
FAQ
Zero Liquid Discharge System FAQs
Buyer-focused answers on Zero Liquid Discharge System selection, ZLD plant cost factors, RO reject treatment, MEE/ATFD operation, water recovery, compliance, automation, and maintenance.
What is a Zero Liquid Discharge System and how does it work?
A Zero Liquid Discharge System treats industrial wastewater by recovering reusable water and converting remaining brine into solid or manageable residue. It typically includes pretreatment, UF/RO, high-recovery RO, MEE, crystallizer or ATFD, condensate polishing, and salt handling.
Which industries need a Zero Liquid Discharge System?
A Zero Liquid Discharge System is used in textile, dyeing, pharmaceutical, chemical, food processing, power, steel, metal finishing, automobile, and CETP facilities. It is recommended where RO reject, high-TDS effluent, or strict discharge norms require water recovery and zero liquid discharge compliance.
How does an industrial ZLD plant treat RO reject?
An industrial ZLD plant treats RO reject by concentrating it through high-recovery RO, brine concentrators, MEE, crystallizers, or ATFD dryers. Recovered condensate is reused, while salts or sludge are collected for safe handling as per site and regulatory requirements.
Can WTE customize a Zero Liquid Discharge System for my factory?
Yes. WTE customizes each Zero Liquid Discharge System according to effluent flow, TDS, COD, hardness, silica, RO reject volume, recovery target, condensate quality, salt disposal method, utilities, footprint, automation level, and O&M requirements.
Can recovered water from a ZLD system be reused in the plant?
Yes. Recovered RO permeate and evaporator condensate can be reused for cooling tower make-up, boiler feed support after polishing, washing, utilities, and selected process applications. Final reuse depends on treated water quality and process requirements.
What factors affect Zero Liquid Discharge System cost?
Zero Liquid Discharge System cost depends on effluent flow, TDS, COD, RO reject volume, recovery target, MEE capacity, ATFD or crystallizer requirement, automation level, utilities, civil scope, and site conditions. WTE provides a customized proposal after technical review.