• Overview:

As the name implies, the system produces no liquid discharge after the desalination process. In fact, all the water used will be recovered and the remaining salts and sediments will be extracted in solid form. These solids, which have smaller volumes than liquid discharge, can be reused if having any economic value or disposed of in accordance with local environmental principles. With the implementation of binding environmental regulations, the ZLD market is growing as such systems are now operating in a wide range of industries.

Liquid evaporation and condensation technology has been well used in the past 30 years to have a ZLD process. Evaporation can recover about 95% of the waste. A small amount of brine and sludge enters the dewatering and crystallization section to separate all available water.

Key factors in the design of the ZLD are:

• Existing pollutants in the waste water
• Volume of dissolved material in the waste water
• Waste water discharge amount

Sepahan MAPNA Engineering & Equipment Manufacturing Company has a good record in related projects and is able to design, supply, and manufacture this equipment.