Zero Liquid Discharge

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Sustainable and Energy-Efficient ZLD Systems in India


GPT provides complete system and solutions for ZLD. We are a water and wastewater treatment plant manufacturer and supplier providing advanced brine minimisation solutions for various industries. 

Our proprietary Sustainable Brine Shrinker (SBS©) system based on hybrid Forward Osmosis Membrane (FO) technology is an advanced membrane-based system that effectively treats and recycles complex industrial wastewater for Zero Liquid Discharge (ZLD) applications.

We can custom-build and provide ZLD plant of capacities ranging from 5 to 500 m3/day capacity capable of treating high TDS, high COD and high turbidity wastewater effectively. 

Conventional thermal technologies such as multi-stage evaporator (MEE) and crystallization system often require high capital investment, expensive equipment setup and increased operation and maintenance (O&M) costs.

The SBS© system offers economical and sustainable alternative over traditional route and it helps to achieve reduction in evaporation and drying load. 

GPT has developed patented SBS© system offering multiple benefits. SBS© has been tested successfully and implemented commercially for effluent treatment plant in India in various industries. 

Advantages of SBS©
– 70% water recovery
– >13% concentrate TDS
– excellent salt rejection with <1000 ppm of product water TDS
– 8 to 12 kWh/m3 of energy consumption
– 50% reduction in O&M costs and 30% reduction in capital investment due to reduced load on evaporator/dryer system
– less chemical use
– integrated and modular structure

GPT’s typical ZLD system will consist of:
– Primary treatment
– Secondary treatment system involving advanced Membrane Bioreactor (MBR Technology) 
– Optional Reverse Osmosis (RO) system to achieve desired brine concentration
– Forward Osmosis membrane system for tertiary treatment and enhanced brine recovery
– Compact and downsized evaporator/dryer system

Advantage of GPT’s ZLD System

  • Meeting strict compliances of regulatory bodies

  • Excellent product water quality 

  • Reliable and robust operations

  • Less operation and maintenance costs

  • Simple operation and easily deployable

Industries using ZLD

  • Chemical and process industry

  • Textile, dyes and intermediate  

  • Food and beverage

  • Pharma and Life sciences

  • Sugar and distilleries

  • Paper and pulp

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Ahmedabad, Gujarat- INDIA