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Workshop. An innovative project to reduce micropollutants released by wastewater treatment plants

© J-M. Choubert / Irstea

01/05/2018

What if the solution to eliminating recalcitrant micropollutants (drug, pesticide, hormone residues, etc.) present in wastewater treatment plant discharge was ozone treatment? Communities, scientists and water professionals: discover the results of the first real-world study and discuss the findings with experts during a workshop at the 19th Carrefour de l'Eau (Water Conference), on January 25 in Rennes. Free sign-up available. 

Many undesirable chemical substances are found in the water discharged by wastewater treatment plants. Some of these are not biodegradable (glyphosate, diuron[1], etc.) while others are adequately eliminated yet still remain in very small concentrations, with proven toxic consequences. In order to improve the quality of discharged water, Irstea and Suez have evaluated the effectiveness of ozone treatment, a complementary treatment technology. Widely used in Switzerland and Germany, the process uses the oxidizing potential of ozone to eliminate recalcitrant micropollutants.

Uniquely, scientists carried out an on-site evaluation over 3 years at the Sophia Antipolis plant (population equivalent of 30,000), the only wastewater treatment plant in France equipped with an ozone treatment facility to treat priority substances.

In total, 12 sampling campaigns were carried out using different ozone doses and 76 micropollutants resistant to the biological wastewater treatment were analyzed Scientists also identified the best doses of ozone to use to treat micropollutants according to their capacity for oxidation. Additionally, the environmental and energy impact of ozone treatment was studied to support communities in choosing appropriate strategies.

Discover the results of the Micropolis-Procédés [3] project and come and ask the study leaders questions during a dedicated workshop at the Carrefour des Gestions Locales de l’Eau (Local Water Management Conference) on Thursday, January 25, from 11:30am to 1pm in Rennes. Over 70 talks will punctuate this large gathering of water professionals, which brings together 450 exhibitors and over 10,000 participants every year.

You can register for free here with the invitation code CGLE2018 (registration fees do not include lunch).

Consult the program for the 19th Carrefour de l'Eau on January 24 and 25, 2018.

For more information

[1] Pesticide

[2] 23 metals and 53 organic substances (15 hormones, 7 pesticides, 26 pharmaceutical products and 5 metabolites)

[3] Project funded by the Rhone-Mediterranean and Corsica Water Agency