Ozonation of textile effluent dye in a bubble column reactor-An innovative approach

Bubble Column Reactors (BCR), the gas-liquid contacting device for ozonation of dye apart from being cost effective and versatile are best suited for ozonation process of textile dye effluents. Color is one of the most important hazards in industrial effluents, which needs to be treated, because the presence of dyes in water reduces light penetration, precluding the photosynthesis of aqueous flora. The ozonation process has been recommended as a potential alternative for decolorization and improvement of the biological degradation of textile effluents. Ozone specifically attacks the conjugated chains that impart color to the dye molecule. Bubble column reactors belong to the general class of multiphase reactors which consist of three main categories namely, the trickle bed reactor, fluidized bed reactor and the bubble column reactor. Dye ozonation which takes place in a batch bubble column has excellent and effective heat transfer and mass transfer characteristics.