REMOVAL OF ORGANIC-SUBSTANCES FROM WATER BY OZONE TREATMENT FOLLOWED BY BIOLOGICAL ACTIVATED CARBON TREATMENT

As an advanced water treatment, a combination of ozonation and biologi cal activated carbon (BAG, hereafter) treatment is being applied to pu rify raw water for municipal use in some cases. The authors examined e ffects of ozonation on water quality in a batch system, using water sa mples containing organic substances fractionated to several molecular weight ranges. Also, a flow test of laboratory-scale was performed to study on the capability of the treatment in terms of removal efficienc y of the dissolved organic substances, e.g., fumic substances, which p reoxidized with ozone, As a result, the changes in equilibrium adsorpt ion and in the biodegradability of organic substances dissolved in wat er before and after oxidation with ozone were made clear, (C) 1997 IAW Q. Published by Elsevier Science Ltd.