ISSN:
1574-6941
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
Notes:
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 O2), 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 ∼5 μM O2 microsensors showed that the thickness of the activity zones varied as a function of bulk O2 and NO−2 concentrations and flow rate.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1016/j.femsec.2004.09.003
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