Zero Liquid Discharge (ZLD) System
Complete Wastewater Recovery & Zero Discharge Compliance for Industries
Varsha Enviro Technologies is a leading Zero Liquid Discharge (ZLD) system manufacturer in India, delivering high-efficiency ZLD solutions designed for industries with high TDS, high-salinity and complex wastewater. Our ZLD systems ensure 95–99% water recovery and complete elimination of liquid effluent discharge, helping industries meet strict CPCB/SPCB environmental regulations.
Why Industries Need ZLD
ZLD is essential for industries such as textile, chemical, pharma, dyeing and heavy manufacturing where wastewater contains high levels of dissolved solids, color, salts and harmful pollutants. With rising regulatory pressure in Delhi NCR, Haryana, Rajasthan and major industrial belts, ZLD helps companies achieve sustainability, reduce freshwater consumption and avoid penalties.
ZLD System Components
- Pre-Treatment System: Removes suspended solids, hardness and organic impurities using sand filter, carbon filter, softener and ultra-filtration (UF).
- Reverse Osmosis (RO) System: Reduces TDS and dissolved impurities, producing permeate for reuse and sending concentrated reject to evaporators.
- Multiple Effect Evaporator (MEE): Concentrates RO reject using low-pressure steam to reduce energy consumption.
- ATFD (Agitated Thin Film Dryer): Converts concentrated slurry into dry solid salts for easy disposal.
- Crystallizer (Optional): Used for recovery of pure solid salts where required.
- Solid Waste Handling: Dry solids are collected and disposed of as per environmental norms.
ZLD Treatment Process Flow
- Pre-treatment (sand filter, carbon filter, softener, UF)
- RO treatment (permeate reuse, reject to evaporator)
- Concentration through MEE
- Final drying through ATFD
- Solid waste collection & disposal
- Reuse of recovered water (95–99%)
Key Features of Our ZLD Systems
- 95–99% water recovery
- Ideal for high-TDS industrial wastewater
- Low steam consumption & energy-optimized design
- Corrosion-resistant construction
- Fully automated PLC / SCADA operation
- Long service life for MEE & ATFD units
- Minimal environmental impact
Applications
- Textile dyeing & printing
- Chemical & petrochemical
- Pharmaceutical & API manufacturing
- Fertilizer & pesticide industries
- Electroplating & metal finishing
- Distilleries & breweries
- Paper & pulp units
Benefits of Installing ZLD
- Zero discharge ensures complete environmental compliance
- Reduces dependency on freshwater sources
- Enables high-quality water reuse for process & utilities
- Lower disposal costs due to dry solid waste
- Improves industry sustainability & ESG rating
- Avoids penalties from pollution control boards
Why Choose Varsha Enviro for ZLD Solutions?
We provide fully engineered ZLD solutions with RO, MEE and ATFD integration designed for long-term performance. Our systems are optimized for low energy usage and easy maintenance. We offer nationwide support, operator training and complete turnkey execution across India.
FAQs
What is the cost of a ZLD system?
Small ZLD systems start around ₹35–45 lakh. Large industrial ZLD plants cost more based on flow and TDS level.
What is MEE and why is it important?
MEE (Multiple Effect Evaporator) concentrates RO reject and reduces evaporation cost using multi-stage heating.
What is ATFD in ZLD?
ATFD (Agitated Thin Film Dryer) converts concentrated effluent into dry powdery solids.
How much water can be recovered through ZLD?
ZLD systems can recover 95–99% of the wastewater.
Which industries require ZLD?
Textile, chemical, dyeing, pharma, electroplating and high-TDS industrial units.