In today’s world, zero liquid discharge (ZLD) has become an important concept in wastewater treatment since the Regulatory norms are becoming stringent concerning the limits of liquid discharge & Wastewater treatment. A ZLD system implies that practically no liquid waste goes outside the boundary of the manufacturing facility.

Reverse Osmosis (RO) system has been used by industries for ETP recycle applications for years and they face problems in disposing RO Reject, which has high TDS value. This RO reject can be fed to multiple effect evaporator (MEE) where the dissolved solids will be concentrated. Thus, we get condensate which has very low TDS and solid crystals that can be sent to landfill. The Condensate which is coming from the Evaporator can be combined with RO permeate and can be reused as process water.