期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 16, 页码 7415-7421出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2011.05.032
关键词
Pharmaceuticals; Biodegradation; Activated sludge; Active heterotrophic biomass; Sludge retention time
资金
- Luxembourg Research Fund (FNR) [AFR 07/017]
- Ministry of the Interior and the Greater Region, Luxembourg
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 SRI. Pseudo first-order kinetics were modified to include Xbh and used to describe decreasing PhAC elimination with increasing SRT. (C) 2011 Elsevier Ltd. All rights reserved.
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