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http://dx.doi.org/10.17663/JWR.2011.13.1.129

The investigation of clindamycin biodegradation in nitrifying activated sludge  

Cho, Yun-Chul (고려대학교 환경기술정책연구소)
Kim, Lee-Hyung (공주대학교 건설환경공학부)
Kim, Sung-Pyo (고려대학교 환경시스템 공학과)
Publication Information
Journal of Wetlands Research / v.13, no.1, 2011 , pp. 129-137 More about this Journal
Abstract
The aim of this study is to evaluate the biodegradability of the micro-contaminant, clindamycin antibiotic, under nitrifying activated sludge (AS) condition. Based on the short-term clindamycin degradation batch test at an environmentally relevant concentration (10 ppb), clindamycin disappearance half-life ($t_{0.5}$) was estimated to be 9.1hrs under nitrification condition. However, biodegradation was slower (26.1 hrs) when nitrification was inhibited. Also, one clindamycin metabolite was detected under nitrification condition, but not under inhibited nitrification condition. Based on the mass spectra, the metabolite is suspected to be clindamycin-sulfoxide (m/z 441), which is known to have antimicrobial activity. The metabolite was not degraded during the long term batch study, suggesting that under the conditions tested, biodegradation of clindamycin in activated sludge systems is ineffective.
Keywords
Microcontaminant; Clindamycin; Metabolites; Wastewater; Nitrification; Activated sludge;
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