Suspended biofilm carrier and activated sludge removal of acidic pharmaceuticals

Per Falås, Aude Baillon-Dhumez, Henrik Rasmus Andersen, A. Ledin, Jes la Cour Jansen

Research output: Contribution to journalJournal articleResearchpeer-review

1 Downloads (Pure)


Removal of seven active pharmaceutical substances (ibuprofen, ketoprofen, naproxen, diclofenac, clofibric acid, mefenamic acid, and gemfibrozil) was assessed by batch experiments, with suspended biofilm carriers and activated sludge from several full-scale wastewater treatment plants. A distinct difference between nitrifying activated sludge and suspended biofilm carrier removal of several pharmaceuticals was demonstrated. Biofilm carriers from full-scale nitrifying wastewater treatment plants, demonstrated considerably higher removal rates per unit biomass (i.e. suspended solids for the sludges and attached solids for the carriers) of diclofenac, ketoprofen, gemfibrozil, clofibric acid and mefenamic acid compared to the sludges. Among the target pharmaceuticals, only ibuprofen and naproxen showed similar removal rates per unit biomass for the sludges and biofilm carriers. In contrast to pharmaceutical removal, the nitrification capacity per unit biomass was lower for the carriers than the sludges, which suggests that neither the nitrite nor the ammonia oxidizing bacteria are primarily responsible for the observed differences in pharmaceutical removal. The low ability of ammonia oxidizing bacteria to degrade or transform the target pharmaceuticals was further demonstrated by the limited pharmaceutical removal in an experiment with continuous nitritation and biofilm carriers from a partial nitritation/anammox sludge liquor treatment process.
Original languageEnglish
JournalWater Research
Issue number4
Pages (from-to)1167-1175
Publication statusPublished - 2012

Fingerprint Dive into the research topics of 'Suspended biofilm carrier and activated sludge removal of acidic pharmaceuticals'. Together they form a unique fingerprint.

Cite this