On-site evaluation of the removal of 100 micro-pollutants through advanced wastewater treatment processes for reuse applications

Author:

Ruel S. Martin1,Choubert J. M.2,Esperanza M.1,Miège C.2,Navalón Madrigal P.3,Budzinski H.4,Le Ménach K.4,Lazarova V.1,Coquery M.2

Affiliation:

1. CIRSEE, Suez Environnement, 38 rue du Président Wilson, 78230 Le Pecq, France

2. Cemagref, UR MALY, 3 bis quai Chauveau – CP 220, F-69336 Lyon, France

3. Labaqua. C/ del dracma, Parcelas 16-17-18, Pol. Ind. Las Atalayas, 03114 Alicante, Spain

4. ISM-LPTC, Université Bordeaux 1, 351 Cours de la libération, 33405 Talence cedex, France

Abstract

The next challenge of wastewater treatment is to reliably remove micro-pollutants at the microgram per litre range in order to meet reuse applications and contribute to reach the good status of the water bodies. A hundred priority and relevant emerging substances were measured to evaluate at full-scale the removal efficiencies of seven advanced treatment lines (one membrane bioreactor process and six tertiary treatment lines) that were designed for reuse applications. To reliably compare the processes, specific procedures for micro-pollutants were applied for sampling, analysis and calculation of removal efficiencies. The membrane bioreactor process allowed to upgrade the removal efficiencies of about 20% of the substances measured, especially those that were partially degraded during conventional processes. Conventional tertiary processes like high rate clarification, sand filtration and polishing pond achieved significant removal for some micro-pollutants, especially for adsorbable substances. Advanced tertiary processes, like ozonation, activated carbon and reverse osmosis were all very efficient to complete the removal of polar pesticides and pharmaceuticals; metals and less polar substances were better retained by reverse osmosis.

Publisher

IWA Publishing

Subject

Water Science and Technology,Environmental Engineering

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