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Even though nitrification/denitrification is a robust technology to remove nitrogen from sewage, economic incentives drive its future replacement by shortcut nitrogen removal processes. The latter necessitates high potential activity ratios of ammonia oxidizing to nitrite oxidizing bacteria (rAOB/rNOB). The goal of this study was to identify which wastewater and process parameters can govern this...
Anaerobic ammonium oxidizing bacteria (anammox) can be severely inhibited by one of its main substrates, nitrite (NO2−). At present, there is limited information on the processes by which anammox bacteria are able to tolerate toxic NO2−. Intracellular consumption or electrochemically driven (transmembrane proton motive force) NO2− export are considered the main mechanisms of NO2− detoxification. In...
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