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Impact of solid retention time and nitrification capacity on the ability of activated sludge to remove pharmaceuticals

In English

Författare

Summary, in English

Removal of five acidic pharmaceuticals (ibuprofen, ketoprofen, naproxen, diclofenac and clofibric acid) by activated sludge from five municipal activated sludge treatment processes, with various sludge ages and nitrification capacities, was assessed through batch experiments. The increase in aerobic sludge age from 1-3 to 7 d seemed to be critical for the removal of naproxen and ketoprofen, with markedly higher rates of removal at sludge ages of 7 d or more. No removal was shown for diclofenac and clofibric acid, whereas high rates were observed for ibuprofen in all investigated sludges. Parallel examinations of activated sludge batches with and without allylthiourea (12 mg/L), an inhibitor of ammonia monooxygenase, showed minor to moderate influence on the removal rates of ketoprofen and naproxen. These results suggest that the removal rates of biodegradable pharmaceuticals in municipal activated sludge processes are strongly linked to the heterotrophic bacteria community.

Publiceringsår

2012

Språk

Engelska

Sidor

865-872

Publikation/Tidskrift/Serie

Environmental Technology

Volym

33

Issue

8

Dokumenttyp

Artikel i tidskrift

Förlag

Taylor & Francis

Ämne

  • Chemical Engineering

Nyckelord

  • activated sludge
  • nitrification
  • solid retention time
  • pharmaceuticals

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 1479-487X