Recover all water and reduce contaminants to solid waste — the most demanding target in water treatment.
Zero Liquid Discharge (ZLD) is an engineering approach to water treatment where all water is recovered and contaminants are reduced to solid waste. While many processes attempt to maximise recovery of freshwater and minimise waste, ZLD is the most demanding target — the cost and challenges of recovery increase as the wastewater becomes more concentrated. Salinity, scaling compounds and organics all increase in concentration, which adds cost to managing them. ZLD is achieved by stringing together water-treatment technologies that can treat the wastewater as the contaminants are concentrated.
Several methods of waste management are classified as zero liquid discharge, despite using different boundaries to define the point where discharge occurs. Usually a facility or site property line that houses the industrial process is considered the boundary condition, where wastewater must be treated, recycled and converted to solids for disposal to achieve zero liquid discharge.
Tell us your recovery target and CWG will engineer a recycling / zero-liquid-discharge system for your plant.
