Search for: [Abstract = "The article presents the work of the Water Treatment Plant in the town of Otoczna, located in the Wielkopolska province, before and after the modernization of the technological line. It includes the quality characteristics of the raw water and treated water with particular emphasis on changes in the quality indicators in the period 2002 \- 2012 in relation to the physicochemical parameters\: the content of total iron and total manganese, the ammonium ion as well as organoleptic parameters \(colour and turbidity\)."]

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