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首页> 外文期刊>Applied Microbiology and Biotechnology >Selective enrichment and characterization of a phosphorus-removing bacterial consortium from activated sludge
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Selective enrichment and characterization of a phosphorus-removing bacterial consortium from activated sludge

机译：活性污泥中除磷细菌财团的选择性富集和表征

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摘要

Under alternating aerobic/anaerobic conditions and without additional carbon sources, a bacterial consortium consisting initially of 18 bacterial strains was obtained in a sequence batch reactor. The phosphorus removal capability could only be maintained using sterile filtrate of activated sludge as medium. The addition of calcium and magnesium salts, as well as vitamins and trace elements, to autoclaved sterile filtrate of activated sludge was not sufficient to achieve stable phosphorus removal. A further enrichment by subcultivation on solid agar, freezing, and shortening of the aerobic and anaerobic phases led to a defined bacterial consortium consisting of four strains. On the basis of physiological and chemotaxonomic characterization, and partial 16-S rRNA sequencing, one of the organisms was identified as Delftia acidovorans. A further isolate belonged to the Bacillus cereus group, and the third isolate was identified as Microbacterium sp.. The remaining strain seems to represent a new genus within the Flavobacteriaceae. Under continuous chemostat conditions, this consortium was able to remove up to 9.6 mg P/l phosphate in the aerobic phase and released up to 8.5 mg/l in the anaerobic phase. Up to 25 mg P-polyphosphate/g dry mass was stored under aerobic conditions.
机译：在交替的好氧/厌氧条件下，没有额外的碳源，在顺序分批反应器中获得了最初由18个细菌菌株组成的细菌联合体。除磷能力只能使用活性污泥的无菌滤液作为培养基来维持。向高压灭菌的活性污泥无菌滤液中添加钙和镁盐以及维生素和微量元素不足以实现稳定的除磷效果。通过在固体琼脂上继代培养，冷冻以及需氧和厌氧期缩短的进一步富集，形成了由四个菌株组成的确定的细菌聚生体。根据生理和化学分类学特征，以及部分16-S rRNA测序，一种生物被鉴定为嗜酸Delftia。另一个分离株属于蜡状芽孢杆菌组，第三个分离株被鉴定为Microbacter sp.。剩余的菌株似乎代表黄杆菌科中的一个新属。在连续的化学恒温条件下，该财团能够在需氧阶段去除高达9.6 mg P / l的磷酸盐，而在厌氧阶段则去除高达8.5 mg / l的磷。在有氧条件下，最多可存储25 mg P-聚磷酸盐/ g干物质。

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  • 来源
    《Applied Microbiology and Biotechnology》 |2002年第1期|106-111|共6页
  • 作者

    J. Hollender; U. Dreyer; L. Kornberger; P. Kämpfer; W. Dott;

  • 作者单位

    Institut für Hygiene und Umweltmedizin RWTH Aachen Pauwelsstrasse 30 52074 Aachen Germany;

    Fachgebiet Hygiene und Umweltmikrobiologie TU Berlin 13353 Berlin Germany;

    Institut für Hygiene und Umweltmedizin RWTH Aachen Pauwelsstrasse 30 52074 Aachen Germany;

    Institut für Angewandte Mikrobiologie Justus-Liebig-Universität Gießen Germany;

    Institut für Hygiene und Umweltmedizin RWTH Aachen Pauwelsstrasse 30 52074 Aachen Germany;

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