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首页> 外文期刊>Environmental Science & Technology >Dynamic Assessment of the Floc Morphology, Bacterial Diversity, and Integron Content of an Activated Sludge Reactor Processing Hospital Effluent
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Dynamic Assessment of the Floc Morphology, Bacterial Diversity, and Integron Content of an Activated Sludge Reactor Processing Hospital Effluent

机译：活性污泥反应器处理医院污水的絮凝形态，细菌多样性和整倍体含量的动态评估

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摘要

The treatment of hospital effluents (HE) is a major concern, as they are suspected of disseminating drugs and antibiotic resistance determinants in the environment. In order to assess HE influence on wastewater treatment plant biomass, lab-scale conventional activated sludge systems (CAS) were continuously fed with real HE or urban effluent as a control. To gain insights into the main hurdles linked to HE treatment, we conducted a multiparameter study using classical physicochemical characterization, phase contrast and confocal laser scaning microscopy, and molecular biology (i.e., pyrosequencing) tools. HE caused erosion of floe structure and the production of extracellular polymeric substances attributed to the development of floc-forming bacteria. Adaptation of the sludge bacterial community to the HE characteristics, thus maintaining the purification performance of the biomass, was observed. Finally, the comparative metagenomic analysis of the CAS showed that HE treatment resulted in an increase of class 1 resistance integrons (RIs) and the introduction of Pseudomonas spp. into the bacterial community. HE treatment did not reduce the CAS process performance; nevertheless it increases the risk of dissemination into the environment of bacterial species and genetic determinants (RIs) involved in antibiotic resistance acquisition.
机译：医院污水（HE）的治疗是一个主要问题，因为怀疑它们会在环境中传播药物和抗生素耐药性决定因素。为了评估HE对废水处理厂生物量的影响，将实验室规模的常规活性污泥系统（CAS）连续供入真正的HE或城市污水作为对照。为了深入了解与HE治疗相关的主要障碍，我们使用经典的物理化学表征，相衬和共聚焦激光扫描显微镜以及分子生物学（即焦磷酸测序）工具进行了多参数研究。 HE引起了絮凝物结构的侵蚀，并由于形成絮凝物的细菌而导致了细胞外聚合物质的产生。观察到污泥细菌群落适应HE特性，从而保持生物质的净化性能。最后，CAS的比较宏基因组学分析表明，HE治疗导致1类抗性整合素（RIs）的增加和假单胞菌（Pseudomonas spp）的引入。进入细菌群落。 HE处理并没有降低CAS工艺的性能。然而，它增加了涉及获得抗生素抗性的细菌和遗传决定因素（RI）传播到环境中的风险。

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  • 来源
    《Environmental Science & Technology》 |2013年第14期|7909-7917|共9页
  • 作者

    Thibault Stalder; Mousaab Alrhmoun; Jean-Noeel Louvet; Magali Casellas; Corinne Maftah; Claire Carrion; Marie-Noeelle Pons; Ole Pahl; Marie-Cecile Ploy; Christophe Dagot;

  • 作者单位

    Insenn, U1092, Limoges F-87000, France,Universite de Limoges, UMR-S1092, Limoges F-87000, France,Universite de Limoges, EA4330 GRESE-ENSIL, Limoges F-87000, France;

    Universite de Limoges, EA4330 GRESE-ENSIL, Limoges F-87000, France;

    University of Liege, Gembloux Agro-Bio Tech, 2 Passage des Deportes, Gembloux B-S30, Belgium;

    Universite de Limoges, EA4330 GRESE-ENSIL, Limoges F-87000, France;

    Universite de Limoges, EA4330 GRESE-ENSIL, Limoges F-87000, France;

    Service commun de microscopie-CIM, Universite de Limoges, Faculte de Medecine, Limoges F-87000, France;

    Laboratoire Reactions et Genie des Procedes-CNRS, Universite de Lorraine, 1 rue Grandville, BP 20451, S4001 Nancy cedex, France;

    School of Engineering and Built Environment - Glasgow Caledonian University - Cowcaddens Road, Glasgow G4 0BA, Scotland,U.K.;

    EA4330 GRESE, ENSIL-Ester Technopole 16 me Atlantis 87068 Limoges Cedex, France;

    Inserm U1092,Faculte de medecine 2, roe du Docteur Marcland 87065 Limoges Cedex, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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