In response to the national water strategies and pursuing to close the urban water loop with minimum concern, a proactive approach needs to be considered for future drinking water treatment process in Singapore. Ozone or ozone based advanced oxidation process (AOP) followed by granular activated carbon (GAC) can be one of the best available and cost-effective processes in implementing the national water strategies.

Xylem Water Solutions and PUB jointly started a two-year ozone based AOP pilot study at a Waterworks in Singapore. The objective of the project is to study the effectiveness of ozone based AOP on the removal of taste and odour compounds and various emerging organic contaminants. In this paper, the first year results with six selected contaminants show that it is promising to employ ozone based AOP to remove the concerned organic contaminants.

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