[Study relationship of Haas formation potential and organic molecular weight distribution in the process of O3/BAC].

We investigated the removal of organic matters with different molecular weight (MW) and HAAs formation potential composed of organic matters with different MW in the two processes of 03/BAC and micro-aeration/BAC, and discussed the characteristic of forming HAAs by organic matters with different MW. The results indicated that more than 90% of organic matters with >30 x 10(3) molecular weight could be removed in the process of O3/BAC. In the water treated by the two processes of O3/BAC and micro-aeration/BAC, the percentage of organic matters with < 10(3) MW exceeded 50%, 10 x 10(3)-30 x 10(3) MW was in 20%-30% based on UV254 value as token of organic matters.