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Zero Liquid Discharge

The scarcity of valuable freshwater resources, concerns about the environmental impact of industrial wastewater discharge and increasing regulatory controls make a compelling case for recycling and reuse. Zero Liquid Discharge (ZLD) is the next generation of wastewater recovery methodology for industrial applications, resulting in significant payback  (by enabling businesses to save money, reduce environmental impact and meet legislation for discharge).

Further Details

Ovivo are market leaders in Zero Liquid Discharge (ZLD) practises, with the experience and technical know-how to deliver efficient, innovative solutions for the management of entire water cycles – creating value in water wherever water it is used. 

Typical use

ZLD evaporator systems for concentrating liquid waste streams allow you to recover distilled water from waste streams including:

  • Boiler, scrubber or cooling tower blowdown
  • Demineralization waste
  • Flue gas scrubbing wastewater 
  • Landfill leachate, oilfield, mine and plant drainage
  • Reverse Osmosis concentrate
  • Metal finishing wastewater

Crystallizing systems for ZLD reduce wastewater discharge and, in many cases, can allow you to capture valuable by-products. Typically an evaporator or RO (Reverse Osmosis) system is used to pre-concentrate wastewater. Crystallization or evaporation then produces water for reuse as well as recovering specific salts that are suitable for disposal or resale to offset plant costs.

 

Advantages

Zero liquid Discharge (ZLD) for industrial wastewaters eliminate the liquid waste streams from your plant and allow the recovery of high quality water for reuse. In many cases, this can reduce plant water consumption by between 10 and 90%. Using ZLD systems it may also be possible to capture valuable by-products which may be sold to offset treatment costs. The potential risks associated with plant waste streams are also reduced.