This paper reports on the investigation conducted by Antwerp Water Works (AWW) in Belgium to make a long term (12 months) comparison between SBF and high-rate DAF to determine which process would be optimal. Three major objectives where put forward at the beginning of the study: technology comparison, gain operational experience and conduct coagulant testing. This paper discusses the result obtained with respect to these objectives. Overall this paper clearly points to the value this type of piloting can bring to water companies.

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