Dynamic assessment of the floc morphology, bacterial diversity and integron content of an activated sludge reactor processing hospital effluent

Thibault Stalder, Mousaab Alrhmoun, Jean-Noël Louvet, Magali Casellas, Corinne Maftah, Claire Carrion, Marie-Noëlle Pons, Ole Pahl, Marie-Cécile Ploy, Christophe Dagot

Research output: Contribution to journalArticle

Abstract

The treatment of hospital effluents (HE) is a major concern, as they are suspected of disseminating drugs and antibiotic resistance determinants in the environment. In order to assess HE influence on wastewater treatment plant biomass, lab-scale conventional activated sludge systems (CAS) were continuously fed with real HE or urban effluent as a control. To gain insights into the main hurdles linked to HE treatment, we conducted a multiparameter study using classical physicochemical characterization, phase contrast and confocal laser scaning microscopy, and molecular biology (i.e. pyrosequencing) tools. HE caused erosion of floc structure and the production of extracellular polymeric substances attributed to the development of floc-forming bacteria.
Original languageEnglish
Pages (from-to)7909–7917
Number of pages9
JournalEnvironmental Science and Technology
Volume47
Issue number14
Early online date21 Jun 2013
DOIs
Publication statusPublished - 2013

Keywords

  • hospital effluents
  • antibiotic resistance
  • bacterial diversity

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