Selective enrichment and characterization of a phosphorus-removing bacterial consortium from activated sludge

被引：0
作者：
Hollender J. [1 ]
Dreyer U. [2 ]
Kornberger L. [1 ]
Kämpfer P. [3 ]
Dott W. [1 ]
机构：
[1] Institut für Hygiene und Umweltmedizin, RWTH Aachen, 52074 Aachen
[2] Fachgebiet Hygiene und Umweltmikrobiologie, TU Berlin
[3] Institut für Angewandte Mikrobiologie, Justus-Liebig-Universität Gießen
来源：
Applied Microbiology and Biotechnology | 2002年 / 58卷 / 1期
关键词：
Activate Sludge; Batch Reactor; Bacillus Cereus; Sequence Batch Reactor; Phosphorus Removal;
D O I：
10.1007/s00253-001-0847-x
中图分类号：
学科分类号：
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.
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页码：106 / 111
页数：5
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