A MULTIPLE-LOOP FLOTATION COLUMN FOR WASTE-WATER TREATMENT

The application of the conventional flotation column to wastewater tre atment has failed to realize its full potential, mainly because of ina dequate mixing (or backmixing) and non-uniform dispersion of bubbles i n the column. Thus, the challenge lies in the development of a mechani cal design, which can provide proper hydrodynamic conditions that will result in efficient separation, with high throughput. This paper desc ribes a new column design, in which multiple draft tubes were used. Te st results demonstrate that this new design is superior to that of the conventional flotation column for wastewater treatment.