Vertical migration of aggregated aerobic and anaerobic ammonium oxidizers enhances oxygen uptake in a stagnant water layer

Vlaeminck, S., Dierick, K., Boon, N. and Verstraete, W. (2007) Vertical migration of aggregated aerobic and anaerobic ammonium oxidizers enhances oxygen uptake in a stagnant water layer. Applied Microbiology and Biotechnology, 75 6: 1455-1461. doi:10.1007/s00253-007-0944-6


Author Vlaeminck, S.
Dierick, K.
Boon, N.
Verstraete, W.
Title Vertical migration of aggregated aerobic and anaerobic ammonium oxidizers enhances oxygen uptake in a stagnant water layer
Journal name Applied Microbiology and Biotechnology   Check publisher's open access policy
ISSN 0171-1741
Publication date 2007-07-01
Sub-type Article (original research)
DOI 10.1007/s00253-007-0944-6
Open Access Status
Volume 75
Issue 6
Start page 1455
End page 1461
Total pages 7
Place of publication Berlin
Publisher Springer
Language eng
Subject 060204 Freshwater Ecology
0605 Microbiology
Abstract Ammonium can be removed as dinitrogen gas by cooperating aerobic and anaerobic ammonium-oxidizing bacteria (AerAOB and AnAOB). The goal of this study was to verify putative mutual benefits for aggregated AerAOB and AnAOB in a stagnant freshwater environment. In an ammonium fed water column, the biological oxygen consumption rate was, on average, 76 kg O2 ha−1 day−1. As the oxygen transfer rate of an abiotic control column was only 17 kg O2 ha−1 day−1, biomass activity enhanced the oxygen transfer. Increasing the AnAOB gas production increased the oxygen consumption rate with more than 50% as a result of enhanced vertical movement of the biomass. The coupled decrease in dissolved oxygen concentration increased the diffusional oxygen transfer from the atmosphere in the water. Physically preventing the biomass from rising to the upper water layer instantaneously decreased oxygen and ammonium consumption and even led to the occurrence of some sulfate reduction. Floating of the biomass was further confirmed to be beneficial, as this allowed for the development of a higher AerAOB and AnAOB activity, compared to settled biomass. Overall, the results support mutual benefits for aggregated AerAOB and AnAOB, derived from the biomass uplifting effect of AnAOB gas production.
Keyword OLAND
Nitrification
Nitritation
Anammox
Oxygen transfer
Lagoon
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Faculty of Engineering, Architecture and Information Technology Publications
Excellence in Research Australia (ERA) - Collection
 
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