Bioresour. technol. (2011) Majewsky

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Titre

Active heterotrophic biomass and sludge retention time (SRT) as determining factors for biodegradation kinetics of pharmaceuticals in activated sludge.

Auteurs

Marius Majewsky⁽ⁱ⁾, Tom Gallé⁽ⁱ⁾, Vivianne Yargeau⁽ⁱⁱ⁾, Klaus Fischer⁽ⁱⁱⁱ⁾.

Affiliations

• (i) Centre de Ressources des Technologies pour l'Environnement (CRTE) - CRP Henri Tudor, Luxembourg - Esch-sur-Alzette
• (ii) Department of Chemical Engineering, Université McGill, 3610 University Street Montreal, Quebec, Canada
• (iii) Department of Analytical and Ecological Chemistry, Université de Trèves, Allemagne

Revue et source

Bioresource technology - ISSN 0960-8524

2011, vol. 102, n°16, pp. 7415-7421 [7 page(s) (article)] (1/2 p.)

Editeur

Elsevier, Kidlington, ROYAUME-UNI

Accès en ligne

Science Direct (Elsevier)

Résumé

The present study investigates the biodegradation of pharmaceutically active compounds (PhACs) by active biomass in activated sludge. Active heterotrophs (X_bh) which are known to govern COD removal are suggested as a determining factor for biological PhAC removal as well. Biodegradation kinetics of five polar PhACs were determined in activated sludge of two wastewater treatment plants which differed in size, layout and sludge retention time (SRT).

Results showed that active fractions of the total suspended solids (TSS) differed significantly between the two sludges, indicating that TSS does not reveal information about heterotrophic activity. Furthermore, PhAC removal was significantly faster in the presence of high numbers of heterotrophs and a low SRT. Pseudo first-order kinetics were modified to include X_bh and used to describe decreasing PhAC elimination with increasing SRT.

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