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Response of different Nitrospira sp. to anoxic periods depends on operational DO

Gilbert, Eva Marianne and Agrawal, Shelesh and Brunner, Fabian C. and Schwartz, Thomas and Horn, Harald and Lackner, Susanne (2014):
Response of different Nitrospira sp. to anoxic periods depends on operational DO.
In: Environmental Science & Technology, American Chemical Society, pp. 2934-2941, 48, (5), ISSN 0013-936X,
DOI: 10.1021/es404992g,
[Online-Edition: http://dx.doi.org/10.1021/es404992g],
[Article]

Abstract

The exploitation of a lag phase in nitrate production after anoxic periods is a promising approach to suppress nitrite oxidizing bacteria, which is crucial for implementations of the combined partial nitritation-anammox process. An in depth study of the actual lag phase in nitrate production after short anoxic periods was performed with varied temperatures and air flow rates. In monitored batch experiments, biomass from four different full-scale partial nitritation-anammox plants was subjected to anoxic periods of 5 ? 60 minutes. Ammonium and the nitrite that was produced were present to reproduce reactor conditions and enable ammonium and nitrite oxidation at the same time. The lag phase observed in nitrite oxidation exceeded the lag phase in ammonium oxidation after anoxic periods of more than 15-20 minutes. Lower temperatures slowed down the conversion rates but did not affect the lag phases. The operational oxygen concentration in the originating full scale plants strongly affected the length of the lag phase, which could be attributed to different species of Nitrospira spp. detected by DGGE and sequencing analysis.

Item Type: Article
Erschienen: 2014
Creators: Gilbert, Eva Marianne and Agrawal, Shelesh and Brunner, Fabian C. and Schwartz, Thomas and Horn, Harald and Lackner, Susanne
Title: Response of different Nitrospira sp. to anoxic periods depends on operational DO
Language: English
Abstract:

The exploitation of a lag phase in nitrate production after anoxic periods is a promising approach to suppress nitrite oxidizing bacteria, which is crucial for implementations of the combined partial nitritation-anammox process. An in depth study of the actual lag phase in nitrate production after short anoxic periods was performed with varied temperatures and air flow rates. In monitored batch experiments, biomass from four different full-scale partial nitritation-anammox plants was subjected to anoxic periods of 5 ? 60 minutes. Ammonium and the nitrite that was produced were present to reproduce reactor conditions and enable ammonium and nitrite oxidation at the same time. The lag phase observed in nitrite oxidation exceeded the lag phase in ammonium oxidation after anoxic periods of more than 15-20 minutes. Lower temperatures slowed down the conversion rates but did not affect the lag phases. The operational oxygen concentration in the originating full scale plants strongly affected the length of the lag phase, which could be attributed to different species of Nitrospira spp. detected by DGGE and sequencing analysis.

Journal or Publication Title: Environmental Science & Technology
Volume: 48
Number: 5
Publisher: American Chemical Society
Divisions: 13 Department of Civil and Environmental Engineering Sciences
13 Department of Civil and Environmental Engineering Sciences > Institute IWAR
13 Department of Civil and Environmental Engineering Sciences > Institute IWAR > Wastewater Engineering
Date Deposited: 11 Apr 2018 08:47
DOI: 10.1021/es404992g
Official URL: http://dx.doi.org/10.1021/es404992g
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