EFFECT OF OZONATION FOR TREATMENT OF MICROPOLLUTANTS PRESENT IN DRINKING-WATER SOURCE

Pilot tests were performed to investigate the effectiveness of ozonati on for the treatment of drinking water. Prior to the experiment, four regional target water were analyzed for determining target compounds. Various organics including pesticides were identified and present also in the conventionally treated tap water. The contamination of pestici des in most raw water was severe and ozonation was found to be effecti ve to remove pesticides significantly. Other organic species were remo ved effectively as the order of aromatic amines, nitro compounds, keto nes and ethers. On the whole, volatile organics were removed effective ly than DOG, CH2Cl2 extractable organics. Accompanying with the increa sement of AOC, aldehydes have increased after ozonation and reduced by post-GAC. Also, bromate was produced after ozonation and it was valid ated to suppress the production of bromate on the presence of ammonia and DOG. (C) 1997 IAWQ.