Zero Liquid Discharge Plant

Zero Liquid Discharge (ZLD) is an advanced wastewater treatment process designed to eliminate all liquid waste from an industrial facility. The primary goal of ZLD is to recycle and reuse 100% of wastewater, thereby ensuring no discharge into the environment. This is achieved through a combination of technologies that recover clean water and convert contaminants into solid waste.

ZLD systems are particularly important in sectors where water scarcity is critical or where strict environmental regulations are enforced such as textile, power, pharmaceutical, chemical, distillery, dyeing and petrochemical industries.

Why is ZLD Essential in Today’s Industrial Landscape?

India, like many parts of the world, is facing growing challenges in water availability and environmental pollution. With increasing regulations by authorities like the Central Pollution Control Board (CPCB) and State Pollution Control Boards (SPCBs), industries are under pressure to manage their water use more responsibly.

ZLD offers multiple benefits:

Working Principle of ZLD

The ZLD process involves the systematic treatment of industrial effluents through multiple stages to separate clean water from contaminants. The treated water is then reused in the plant and the residual salts or solids are safely disposed of or recovered as by-products.

• Typical ZLD Process Flow
• Benefits of Implementing
• Required Equipment
• Why Choose
  Us
• Our Key Features
• Industries We Serve

1. Pre-Treatment

• Removal of suspended solids, oil and grease, and neutralization
• Technologies: Equalization tanks, Oil skimmers, pH adjusters

2. Primary Treatment

• Coagulation, flocculation and sedimentation to reduce TSS and COD

3. Biological Treatment (if required)

• Activated Sludge Process or MBR to reduce BOD

4. Tertiary Treatment

• Advanced filtration such as sand filters and activated carbon filters

5. Reverse Osmosis (RO)

• Multi-stage RO to recover 70–90% of water

6. Evaporation & Crystallization

• Thermal evaporation to recover additional water
• Crystallization to convert remaining waste into solid salt

7. Solid Waste Handling

• Sludge drying and disposal as per environmental norms

• Zero discharge to water bodies
• Recycle up to 95–98% of water for reuse
• Reduce freshwater procurement costs
• Recovery of valuable salts or chemicals (optional)
• Reduce pollution load and protect local ecosystems
• Achieve regulatory compliance and boost CSR

• Equalization tanks
• Flash mixers and flocculators
• Lamella or tube settlers
• Multi-grade filters and activated carbon filters
• Ultrafiltration (UF) unit
• Reverse Osmosis (RO) system
• Evaporators (MVC or MEE)
• Crystallizers and centrifuges
• Sludge dewatering systems
• Instrumentation and automation panels

All our equipment is designed for energy efficiency, low maintenance and high performance. We provide customized solutions based on inlet characteristics and client needs.

• Decades of Industry Experience – Proven expertise across multiple industrial sectors
• Customized Solutions – Tailor-made designs to match your process and discharge norms
• Cutting-edge Technology – Integration of advanced RO, MEE, and automation systems
• Turnkey Solutions – From design and engineering to installation and AMC
• Dedicated Support Team – On-time service and expert troubleshooting
• Competitive Pricing – High value without compromising on quality
• Environmentally Responsible – Designed to reduce your carbon and water footprint

• In-house design and engineering team
• High-quality fabrication as per ISO and BIS standards
• Use of top-tier components and membranes (DOW, Hydranautics, Alfa Laval etc.)
• Modular and scalable designs for future expansion
• Advanced automation with SCADA and remote monitoring
• On-site training for client staff
• End-to-end documentation and regulatory compliance support
• PAN India presence with rapid deployment teams

Textile & Dyeing

Power Plants & Steel

Food & Beverages

Oil & Gas

Leather & Tanneries

Distilleries & Breweries

Pharmaceuticals & Chemicals

Electronics & Semiconductor