Zero Liquid Discharge (ZLD)

Under ZLD, no industrial wastewater is discharged from a supplier’s site in liquid form to the environment. An on-site ZLD treatment system treats and recovers almost all wastewater such that the only water lost is through evaporation or as moisture in the sludge from treatment plant operations. A supplier is not considered to have a ZLD treatment system if there is any industrial liquid discharge to the environment (including the use of recycled wastewater for gardening purposes).