Wastewater treatment of reactive dyestuffs by ozonation in a semi-batch reactor

The ozonation of wastewater containing four different textile reactive dyestuffs in a semi-batch reactor have been studied. Various ozonation conditions - ozone dose, ozone consumption efficiency, etc. - were explored and studied for these various types of dyestuffs. The mass transfer coefficient of ozone in water and its relationship to the ozone efficiency was studied. Pseudo-first order decolouration rate constants for all dyestuffs were determined experimentally.