ZERO LIQUID DISCHARGE (ZLD) SYSTEM

Galvanizing industries, electroplating industries, semiconductor industries, metal processing industries, chemical industries, pharmaceutical industries, oil & gas industries and many other industries generate high saline wastewater. The recycling rate in these industries are < 20%. Conventional treatment processes (chemical and biological) does not remove salinity. Reverse osmosis is the well-known technology to treat saline wastewater however; it is limited with salt concentration in the feed water due to osmotic strength. Moreover, it is always a challenge to treat/dispose the RO rejection/brine/high strength wastewater. Disposing the rejection back to the sea / sewer is another environmental issue that needs to be addressed. Conventional distillation and evaporation methods are too expensive. Inexpensive, environmental friendly technologies are critical for brine treatment and zero liquid discharge (ZLD).