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Optima Water Solutions is a ZLD Plant Supplier in Kolkata. We design and install Zero Liquid Discharge (ZLD) Plants that eliminate liquid effluent discharge completely. ZLD is mandatory for textile, distillery, sugar, tannery, and other industries under CPCB norms. Our ISO 9001:2015 certified systems combine membrane technology with thermal evaporation to recover maximum water and produce only dry solid waste.
What is a Zero Liquid Discharge Plant?
Zero Liquid Discharge (ZLD) is a water treatment process in which all wastewater is treated and recycled — no liquid effluent is discharged to the environment. The process concentrates all dissolved salts and contaminants into a dry solid (cake) that can be safely disposed of or further processed.
A complete ZLD system typically combines: Effluent Treatment Plant (ETP) → Reverse Osmosis (RO) → Multiple Effect Evaporation (MEE) or Mechanical Vapour Recompression (MVR) → Agitated Thin Film Dryer (ATFD) or Spray Dryer.
The CPCB and State PCBs have mandated ZLD for highly polluting industries including textile dyeing, distilleries, sugar mills, tanneries, and pharmaceutical bulk drug manufacturing units across India.
Zero Liquid Discharge Plant in Kolkata — Why It Matters
ZLD demand in Kolkata is limited to select chemical processing units in the Dankuni-Falta belt, since West Bengal's WBPCB generally doesn't apply zero discharge requirements as broadly as Gujarat or Tamil Nadu's textile-focused mandates.
Where needed, ZLD systems here are typically smaller-scale than Gujarat's textile-driven installations.
Key industrial areas we serve in Kolkata:
Regulatory Note: West Bengal Pollution Control Board (WBPCB) mandates ETPs for industries and STPs for large housing projects in Kolkata.
Our 4-Step Process — From Design to Handover
1
Effluent Characterisation
Detailed lab analysis. TDS, COD, BOD, heavy metals, conductivity. Treatability study to determine optimal ZLD train.
2
ZLD Train Design
ETP + RO + MEE/MVR + ATFD configuration. Mass and energy balance. Detailed engineering package.
3
Supply & Installation
In-house fabricated ETP and RO components. MEE/ATFD from specialist partners. Full project management.
4
Commissioning & Compliance
Performance testing to SPCB satisfaction. Documentation for ZLD compliance certificate. Operator training.
Why Choose Optima Water Solutions
- Complete ZLD compliance — no liquid discharge, full regulatory conformity
- Maximum water recovery — 90–95% water recycled back to process
- CPCB/SPCB compliant design — all documentation for pollution board submission
- Technology selection — MEE, MVR, ATFD, spray drying based on your effluent
- Lowest OPEX design — energy recovery integrated to minimise steam/power costs
- ETP + RO + Evaporation — single vendor for the complete ZLD chain
- Salt recovery option — NaCl or Na2SO4 recovery for resale value
- Remote monitoring — SCADA-based plant monitoring with alerts
- 158+ effluent treatment installations — proven base for ZLD scale-up
- Post-commissioning SPCB liaison support for compliance certificate
Industries & Applications in Kolkata
Textile Dyeing
Distillery
Sugar Mill
Tannery
Pharmaceutical
Chemical Plant
Paper & Pulp
Power Plant
Need a Zero Liquid Discharge Plant in Kolkata?
Get a free site visit and custom proposal from our engineers within 48 hours. ISO 9001:2015 certified. 158+ projects delivered across India.
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Common Questions
Zero Liquid Discharge Plant in Kolkata — FAQ
Is ZLD common for Kolkata industrial units?
Less so than in Gujarat or Tamil Nadu's textile centres — WBPCB generally doesn't apply zero discharge requirements as broadly, so ZLD is typically limited to select chemical processing units.
What does a ZLD system cost in Kolkata?
Cost typically runs ₹35 Lakh to over ₹1.8 Crore depending on effluent complexity. Call +91 9711880791 for an assessment specific to your process.
Which Kolkata units most commonly need ZLD?
Select chemical processing units in the Dankuni-Falta industrial belt with effluent that conventional treatment can't adequately address.
Does Optima have ZLD experience relevant to Kolkata's industries?
Yes, though our Kolkata ZLD project volume is smaller than in Gujarat, we bring the same process-specific design approach to any Kolkata unit that genuinely needs it.
Ready to Start?
Our engineers in Kolkata are available for a free site visit and assessment.