Zero Liquid Discharge


Zero-liquid discharge (ZLD) is a water treatment process in which all wastewater is purified and recycled, leaving zero discharge at the end of the treatment cycle. ZLD is an advanced wastewater treatment method that employs a combination of filtration methods. This includes ultrafiltration, reverse osmosis, evaporation / crystallization, and fractional electrodeionization.

Our unparalleled depth of experience in ZLD encompasses more than 160 ZLD installations, including stand-alone thermal / evaporative processes, membrane processes, or hybrid systems, which Aquatech pioneered. Hybrid ZLD systems result in greater value, ease of operation and reduced operating costs.

Zero Liquid Discharge Technologies

Key ZLD Applications

  • Plant Discharge Compliance
  • Cooling Tower Blowdown Treatment
  • Flue Gas Desulphurization (FGD) Wastewater
  • Gasification Wastewater
  • Recycle and Reuse