UTILIZATION OF DISTILLER WASTE LIQUOR EMANATING FROM SODA ASH PLANT

摘要

A process for utilization of distiller waste liquor emanating from soda ash plant for recovering harvestable marine grade gypsum and solar salt having crystalline nature where in distiller waste liquor emanating from soda as plant settled in setting ponds to obtain clear effluent containing 125-150g/I of calcium chloride and sodium chloride, desulphatation of sea water is carried out by mixing clear effluent with sea water of density in range of 6-8ºBe’, resulting sea water taken into solar pan us evaporated till density of 24-25ºBe’ is reached, harvestable gypsum gets deposited in solar pans and is harvested between 8-12ºBe’ and further at 12-24ºBe’, residual brine of 24-25ºBe’ is further allowed to solar evaporate till 27-29ºBe’ to crystallize salt between 24-29ºBe’ and thereby obtaining magnesium chloride-rich end bittern of 27-29ºBe’.