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Isolation and Characteristics of 17β-Estradiol-Degrading Dyella spp. Strains from Activated Sludge


Affiliations
1 Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
 

A 17β-estradiol (E2) degrading strain was isolated by using enrichment culture of activated sludge from wastewater treatment plants and identified as the genus Dyella. The estradiol degradation by this strain fitted in a first-order reaction. The degradation rate constant K was 0.025 h-1. Methanol and sodium acetate could be utilized by the bacteria. In contrast, ethanol and glucose were not completely utilized within 10 days. Estradiol was converted to estrone first and then used for further degradation. Estrone degradation by the bacteria also fitted in a first-order reaction (K=0.0133 h-1). The relationship between the specific degradation rate and substrate concentration fitted in the Monod equation.

Keywords

Activated Sludge, Estrogen, 17β-Estradiol Degradation, Dyella sp.
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  • Isolation and Characteristics of 17β-Estradiol-Degrading Dyella spp. Strains from Activated Sludge

Abstract Views: 132  |  PDF Views: 0

Authors

Changwen Wang
Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
Jun Li
Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
Baihang Zhao
Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
Yonglei Wang
Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China
Guoyang Liu
Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China

Abstract


A 17β-estradiol (E2) degrading strain was isolated by using enrichment culture of activated sludge from wastewater treatment plants and identified as the genus Dyella. The estradiol degradation by this strain fitted in a first-order reaction. The degradation rate constant K was 0.025 h-1. Methanol and sodium acetate could be utilized by the bacteria. In contrast, ethanol and glucose were not completely utilized within 10 days. Estradiol was converted to estrone first and then used for further degradation. Estrone degradation by the bacteria also fitted in a first-order reaction (K=0.0133 h-1). The relationship between the specific degradation rate and substrate concentration fitted in the Monod equation.

Keywords


Activated Sludge, Estrogen, 17β-Estradiol Degradation, Dyella sp.