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From "resistance genes expression" to "horizontal migration" as well as over secretion of Extracellular Polymeric Substances: Sludge microorganism's response to the increasing of long-term disinfectant stress.
Li, Yuxin; Xu, Yanbin; Zhou, Xiao; Huang, Lu; Wang, Guan; Liao, Jingsong; Dai, Ruizhi.
Afiliación
  • Li Y; School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
  • Xu Y; School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China. Electronic address: hopeybxu@163.com.
  • Zhou X; Analysis and Test Center, Guangdong University of Technology, Guangzhou 510006, China.
  • Huang L; Analysis and Test Center, Guangdong University of Technology, Guangzhou 510006, China.
  • Wang G; School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
  • Liao J; Yikangsheng Environmental Science and Technology Limited Company of Guangdong, Yunfu 527400, China.
  • Dai R; Yikangsheng Environmental Science and Technology Limited Company of Guangdong, Yunfu 527400, China.
J Hazard Mater ; 469: 133940, 2024 May 05.
Article en En | MEDLINE | ID: mdl-38457979
ABSTRACT
Glutaraldehyde-Didecyldimethylammonium bromides (GDs) has been frequently and widely employed in livestock and poultry breeding farms to avoid epidemics such as African swine fever, but its long-term effect on the active sludge microorganisms of the receiving wastewater treatment plant was keep unclear. Four simulation systems were built here to explore the performance of aerobic activated sludge with the long-term exposure of GDs and its mechanism by analyzing water qualities, resistance genes, extracellular polymeric substances and microbial community structure. The results showed that the removal rates of CODCr and ammonia nitrogen decreased with the exposure concentration of GDs increasing. It is worth noting that long-term exposure to GDs can induce the horizontal transfer and coordinated expression of a large number of resistance genes, such as qacE, sul1, tetx, and int1, in drug-resistant microorganisms. Additionally, it promotes the secretion of more extracellular proteins, including arginine, forming a "barrier-like" protection. Therefore, long-term exposure to disinfectants can alter the treatment capacity of activated sludge receiving systems, and the abundance of resistance genes generated through horizontal transfer and coordinated expression by drug-resistant microorganisms does pose a significant threat to ecosystems and health. It is recommended to develop effective pretreatment methods to eliminate disinfectants.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fiebre Porcina Africana / Desinfectantes Límite: Animals Idioma: En Revista: J Hazard Mater Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Fiebre Porcina Africana / Desinfectantes Límite: Animals Idioma: En Revista: J Hazard Mater Asunto de la revista: SAUDE AMBIENTAL Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Países Bajos