What is the zero liquid discharge process"
The cooling water system is the major wastewater generator throughout most power plants. Spontaneous evaporation of refrigeration system blowdown from holding ponds has traditionally been highly successful, notably in the western United States. The waste liquid disposal method is a straightforward yet successful instance of a zero liquid discharge (ZLD) system. The disadvantage is that the water is forever destroyed from the mechanism due to natural evaporation, and the leftover waste must be cleansed from the pond regularly. Although cooling system blowdown is typically just under 10,000 mg/L total dissolving solids (TDS), membrane filtration (RO) membranes are frequently used to or before the liquid before concentrating it in evaporation; the residue is converted to solids in a crystallizer. Refrigeration tower blowdown salts, for instance, are typically composed of sodium sulphate and sodium chloride, with trace amounts of calcium, magnesium, sulphate, and bicarbonate. Evaporation