zero liquid discharge (ZLD)

Achieve absolute water circularity. master zero liquid discharge.

In an era of increasing water scarcity and stringent environmental regulations, achieving Zero Liquid Discharge (ZLD) is a necessity. With over 100 years of engineering leadership, EcoProcess is your trusted partner in navigating ZLD complexities. We design and deliver complete turnkey ZLD plants that guarantee compliance while enhancing operational efficiency and resource recovery.

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Construction

Masonary Gallery

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Civil Engineering

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process overview

Zero Liquid Discharge (ZLD) is an advanced wastewater treatment process that completely eliminates liquid discharge. The goal: produce clean, reusable water stream and solid residue for disposal. Critical for industries facing stringent regulations from bodies like India's CPCB.

Typical ZLD process stages

Pre-treatment:

Remove large solids 

Reverse osmosis (RO)

Initial water recovery

High-Efficiency Evaporation(MEE,MVR,TVR)

Concentrate remaining brine

Final Drying (ATFD)

Convert concentrated slurry to solid cake 

Key Performance Metrics

Proven results that drive operational excellence

Maximum Uptime

Robust design with minimal fouling technology 

OPEX Reduction

Significant through minimized energy and maximized recovery 

Steam Consumption

Significant through minimized energy and maximized recovery 

Water Recovery Rate

95% of high-quality water is ready for reuse.

Energy Consumption

As low as ~11.4 kWh/m³ evaporated with MVR 

products & equipment

Comprehensive solutions for every requirement

Heat Exchangers

Shell & Tube, Corrugated, Spiral for maximum heat recovery 

Dry screw systems

Dry Screw and Liquid Ring pumps.                          

Automation & Controls

Stable and automated operation.                     

MEE Systems

Falling Film, Rising Film, Forced Circulation with MVR/TVR integration 

ATFD

Ultimate solution for converting liquid reject to dry solid powder            

Drying Systems

 

Agitated Thin Film Dryers (ATFD)

Rotary Vacuum Paddle Dryers (RVPD)

Agitated Nutsche Filter Dryers (ANFD)

Complete Zero Liquid Discharge (ZLD) Systems

Supporting Vacuum Products

 

Dry Screw Vacuum Pumps

Centralized Vacuum Systems

SUSTAINABILITY & COST EFFICIENCY

Environmental & Economic Benefits

ZLD is the pinnacle of industrial water stewardship and circular economy. By recovering 90-98% of wastewater, it drastically reduces freshwater intake and protects local water resources. Enables recovery of valuable salts/solvents, turning waste into revenue. MVR technology cuts energy consumption by up to 93% compared to conventional methods.

Real-world cost savings example

Steam ejector to dry pump replacement

 

€1,082,002

Previous Annual Cost

€132,266

New Annual Cost

8 months

Payback Period

Process Diagram

pre-treatment

Filtration and chemical treatment 

MEE with MVR/TVR

Further concentration of RO reject

Reverse Osmosis

Clean water recovery, concentrated brine (reject) produced 

ATFD crystallization/ drying

Convert concentrated slurry to dry solid salt cake 
Proven results

case studies

Real-world success stories from industry leaders

transforming the Tirupur textile cluster

 

Challenge:

2011 Madras High Court mandate for ZLD to combat severe water pollution. Hundreds of non-compliant units closed. 

 

Solution:

Systematic adoption of RO + MEE (often with MVR) + ATFD crystallizers for complete ZLD.

 

Results:

 

~95%

Permeate water recovery from RO stage 

Valuable

Salt recovery

0.5-1% (fully solidified)

Final liquid reject reduced 

Transformation

Industry's environmental impact 

industries we serve

Trusted solutions across critical manufacturing sectors

Pharmaceutical

Power

Agrochemical

Chemical

Textile

Tanneries

Food & Beverage

Water-intensive industries facing strict discharge norms

Ready to Design Your Custom ZLD Solution?

Contact our experts today to schedule a complimentary design study. Let's analyze your effluent at our pilot facility and discuss performance guarantees for your custom-built, turnkey ZLD plant.

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Case Study

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