Demo Case 5

Prague, Czech Republic

Background

As part of the Prague Water Supply and Sewerage System the Prague, Podolí DWTP abstracts the raw water from the River Vltava which crosses the city of Prague and is prone to variations in flow and quality. The process train is composed of 3 steps of treatment with the GAC filtration recently added to enhance the removal of organic micropollutants and improve taste and odour.

Key facts

The occurrence and monitoring of organic micropollutants only rely on a periodic collection of samples with analyses performed by a certified laboratory.
The lead time to gather the analytical results impedes the possibility of quickly detecting the occurrence of pollution as well as monitoring the corrective actions.

Expected impacts

Improve early detection of elevated concentrations of organic micropollutants compounds, such as pesticides, and metals.
Better knowledge of treatment technologies able to remove these micropollutants.
Treatment upgrade for further enhancing and securing the distributed water quality.

Challenges

Develop on-line monitoring of organic compounds called “micropollutants” to help us manage better treatment line not only at DWTP Podolí, but at all plants with similar problems and/or source of raw water.

Activities

Testing of an-line analyzers has a long history in Veolia Czech Rep. Last year, we tested new versions of turbidity on-line analyzers supplied by global producers (ProMinent, Hach, E+H, Sigrist) to deliver actual information to all users in the Veolia Group. Now, we are testing latest versions of chlorine on-line analyzers produced by the same companies. Test is provided in different conditions respectively at different water matrices (drinking water from a mountain dam and drinking water from wells). The same procedures will be used for test of analyzers developed in ToDrinq project.