Evaporate water from the RO Reject and make slurry of salt. This system operates based on a combination of the relative humidity present in the air and solar heat. The waste water to be treated is evaporated in a three-stage process. The first stage involves spraying the water in the air by utilizing specially designed nozzles which produce a fine aerosol. This helps in maximum absorption of heat and increase the evaporation of water. The concentrate from this stage is taken to crystallization pans from where the crystallized salt is recovered.
Typical evaporator options available are;
• Mechanical evaporators which utilize diesel / furnace oil as fuel
• Vacuum based multistage stage falling film type evaporators utilizing steam as the heating media
• Multiple effect evaporation plants with Thermal & Mechanical vapor recompression

Evaporator evaporates 90% of the water and rest of the 10% salt slurry is further dried / treated to get solid salt.

• Chemical industry
• Pharmaceutical industry
• Food industry
• Eflluent industry – RO rejection, wastewater