Kinetics, diffusional limitation and microscale distribution of chemistry and organisms in a CANON reactor
In the Completely Autotrophic Nitrogen removal Over Nitrite (CANON) process, aerobic and anaerobic ammonia oxidizing bacteria cooperate to remove ammonia in one oxygen-limited reactor. Kinetic studies, microsensor analysis, and fluorescence in situ hybridization on CANON biomass showed a partial dif...
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Published in | FEMS microbiology ecology Vol. 51; no. 2; pp. 247 - 256 |
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Main Authors | , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Oxford, UK
Elsevier B.V
2005
Blackwell Publishing Ltd Blackwell Oxford University Press |
Subjects | |
Online Access | Get full text |
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Summary: | In the Completely Autotrophic Nitrogen removal Over Nitrite (CANON) process, aerobic and anaerobic ammonia oxidizing bacteria cooperate to remove ammonia in one oxygen-limited reactor. Kinetic studies, microsensor analysis, and fluorescence in situ hybridization on CANON biomass showed a partial differentiation of processes and organisms within and among aggregates. Under normal oxygen-limited conditions (∼5 μM O
2), aerobic ammonia oxidation (nitrification) was restricted to an outer shell (<100 μm) while anaerobic ammonia oxidation (anammox) was found in the central anoxic parts. Larger type aggregates (>500 μm) accounted for 68% of the anammox potential whereas 65% of the nitrification potential was found in the smaller aggregates (<500 μm). Analysis with
O
2
and
NO
2
-
microsensors showed that the thickness of the activity zones varied as a function of bulk
O
2
and
NO
2
-
concentrations and flow rate. |
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Bibliography: | Department of Biology, Northeastern University, 360 Huntington Avenue, Boston, MA 02115, USA ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0168-6496 1574-6941 |
DOI: | 10.1016/j.femsec.2004.09.003 |