An Experimental Study Of Ozonation Followed By Slow Sand Tiltration for the Removal of Colour from Water

Ozone was introduced into the water initially using a packed colum, however, in order to improve the ozone utilisation it was decided to change to a spilt ozone dosage arrangement using a counter flow bubble column followed by a packed colum. Subsequent tests showed that the bubble colum alone produced similar ozone utilisation to the split dosing arrangements and the last 6 test runs were all undertaken using the bubble ozone alone.