Microbial Community Structures' Response to Seasonal Variation in a Full-Scale Municipal Wastewater Treatment Plant

2019 ◽  
Vol 36 (2) ◽  
pp. 172-179 ◽  
Author(s):  
Fang Liu ◽  
Xiaomin Hu ◽  
Xin Zhao ◽  
Huixuan Guo ◽  
Yan Zhao
Keyword(s):  
Wastewater Treatment ◽  
Seasonal Variation ◽  
Microbial Community ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Full Scale ◽  
Municipal Wastewater Treatment ◽  
Community Structures ◽  
Microbial Community Structures

scholarly journals Genes encoding tetracycline resistance in a full-scale municipal wastewater treatment plant investigated during one year

2009 ◽  
Vol 8 (2) ◽  
pp. 247-256 ◽  
Author(s):  
Stefan Börjesson ◽  
Ann Mattsson ◽  
Per-Eric Lindgren
Keyword(s):  
Wastewater Treatment ◽  
Wastewater Treatment Plant ◽  
Municipal Wastewater ◽  
Treatment Plant ◽  
Tetracycline Resistance ◽  
Full Scale ◽  
Municipal Wastewater Treatment ◽  
Genes Encoding ◽  
Total Dna ◽  
One Year

Tetracycline-resistant bacteria and genes encoding tetracycline resistance are common in anthropogenic environments. We studied how wastewater treatment affects the prevalence and concentration of two genes, tetA and tetB, that encode resistance to tetracycline. Using real-time polymerase chain reaction (PCR) we analysed wastewater samples collected monthly for one year at eight key-sites in a full-scale municipal wastewater treatment plant (WWTP). We detected tetA and tetB at each sampling site and the concentration of both genes, expressed per wastewater volume or per total-DNA, decreased over the treatment process. The reduction of tetA and tetB was partly the result of the sedimentation process. The ratio of tetA and tetB, respectively, to total DNA was lower in or after the biological processes. Taken together our data show that tetracycline resistance genes occur throughout the WWTP, and that the concentrations are reduced under conventional operational strategies.

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