By: greenpeb On: October 09, 2017 In: Knowledge Center Comments: 0

GreenPebble Technologies innovative and patented Forward Osmosis system provides a distinct, sustainable, and cost-effective solution compared to conventional technologies. This innovative technology will help industry to address the issue of minimizing waste as well as help in adoption of the cleaner production technologies. Water pollution by inappropriate management of industrial wastewater is one of the major environmental problem encountered globally as well as in India making it extremely necessary to treat as well as recycle industrial wastewater to reduce water scarcity and decrease the burden on natural resources. Forward Osmosis (FO) is a naturally occurring membrane-process in which osmotic pressure gradient occurs across semi-permeable membrane. This process is used in water and wastewater treatment industry to remove the ions, dissolved salts, chemical and biological contaminants and other pollutants with significant lower energy consumption and overall low carbon footprint. For India Forward osmosis is specifically more relevant because of growing environment issues and water scarcity.




Water with high salinity or high TDS concentration flows into Forward Osmosis system where it gets in contact with proprietary draw solution. This system triggers naturally occurring osmosis process driving water from low solution concentration side to high concentration side. Diluted draw solution containing product water leaves from FO unit for recovery section. During recovery low pressure ultrafiltration or Nanofiltration system is applied to recover draw solution and clean product water is recovered. Separated draw solution is again fed back to FO unit with necessary replenishment of fresh draw solution.


Main benefits of FO are as follows: –

  • Low energy consumption
  • High water recovery
  • Easy operation
  • No additional chemical usage
  • Low maintenance
  • Longer membrane life



GreenPebble Technologies has successfully designed, developed, and implemented a Forward Osmosis plant at Nandesari CETP in Gujarat, India, where secondary treatment effluent is being used. Effluent water with TDS in the range of 35000 ppm was successfully treated and recycled for daily capacity of 20,000 Liters. The plant showed positive results giving up to 50% savings in energy consumption and more than 70% of water recovery.


Applications: –

  • Industrial Wastewater Recycle and Reuse
  • High Salinity Water Treatment
  • Seawater Desalination
  • Produce Water from Oil and Gas
  • Zero Liquid Discharge
  • Municipal Wastewater Treatment
  • De-watering in Foods and Beverage Industry

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