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Summary: ENVIRONMENTAL BIOTECHNOLOGY
Influence of trace erythromycin and erythromycin-H2O
on carbon and nutrients removal and on resistance selection
in sequencing batch reactors (SBRs)
Caian Fan & Patrick K. H. Lee & Wun Jern Ng &
Lisa Alvarez-Cohen & Eoin L. Brodie &
Gary L. Andersen & Jianzhong He
Received: 11 June 2009 /Revised: 10 August 2009 /Accepted: 12 August 2009 /Published online: 2 September 2009
# The Author(s) 2009. This article is published with open access at Springerlink.com
Abstract Three sequencing batch reactors (SBRs) were
operated in parallel to study the effects of trace erythromy-
cin (ERY) and ERY-H2O on the treatment of a synthetic
wastewater. Through monitoring (1) daily effluents and (2)
concentrations of nitrogen (N) and phosphorous (P) in
certain batch cycles of the three reactors operated from
transient to steady states, the removal of carbon, N, and P
was affected negligibly by ERY (100µg/L) or ERY-H2O
(50µg/L) when compared with the control reactor. Howev-
er, through analyzing microbial communities of the three
steady state SBRs on high-density microarrays (Phylo-
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