1. Removal efficiency and influencing factors of antibiotic resistance genes in secondary effluent by the process of NaClO-PAC-UF.
- Author
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SUN Li-hua, MA Yao, SHI Peng-fei, and FENG Cui-min
- Subjects
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DRUG resistance in bacteria , *SEWAGE disposal plants , *OXIDIZING agents , *SODIUM hypochlorite , *ACTIVATED carbon - Abstract
The secondary effluent of the sewage treatment plant was treated by sodium hypochlorite oxidation combined with powdered activated carbon and ultrafiltration process (NaClO-PAC-UF). The effects of the dosage of NaClO, pH and temperature on the removal of antibiotic resistance genes (ARGs) and dissolved organic carbon (DOC) in the secondary effluent were investigated. The results show that 8.0 mg/L effective chlorine concentration of sodium hypochlorite oxidizing agent was the best removal effect. The removal amount of different types of ARGs (tetA, tetC, tetG, sulI, sulII) in secondary effluent was 103.25 ~ 103.47 copies/mL. The removal effect of cellular and free ARGs was significantly enhanced. The removal rate of DOC by the combined process was up to 57.5 %, and the removal rate of organic matter with different molecular weight was improved overall. Increasing temperature and decreasing pH can improve the removal effect of ARGs by the combined process. [ABSTRACT FROM AUTHOR]
- Published
- 2023