Kierunki rozwoju technologii uzdatniania wody z Zalewu Zegrzyńskiego w Zakładzie Wodociągu Północnego

Waterworks are to supply the users with quality water in quantities adequate for their needs. To achieve this goal it is necessary to develop new treatment technologies or modify (more or less) those used so far, because the pollution level in the recipients continues to increase, and so do the quality standards for potable water. Making use of the data sets provided by the Northern Waterworks, the quality of the water supplied to the city network, and the efficiency of the treatment train were assessed. The results obtained showed that the treatment train needed improvement (especially at the stage of disinfection) in order to reduce THM precursors in the course of the treatment process and to minimize the potential of THM formation in the water. Thus, it is postulated that (1) the treatment train should be extended by the inclusion of secondary ozonation and adsorption on GAC beds, and (2) chlorine dioxide should be substituted for gaseous chlorine which has been used so far for water disinfection.