N2O production in a single stage nitritation/anammox MBBR process

Glossary
Aerobic – in the presence of oxygen in the form of O2
Anaerobic – an oxygen free environment
Anoxic – environment where oxygen is present as nitrite or nitrate
Autotrophic – organism that can produce organic compounds from carbon dioxide with
light or inorganic chemical compound as energy source
Carbon dioxide equivalent – is a measurement standard where the weight of a
greenhouse gas released in to the atmosphere is converted into the weight of carbon
dioxide that would cause the same temperature rise in Earths ecosystem as the gas in
question
Global warming potential – a measure of how much a given amount of a greenhouse
gas would contribute to global warming in comparison with the same amount of carbon
dioxide. The global warming potential of a greenhouse gas depends on (i) the absorption
of infrared radiation of the gas, (ii) atmospheric life time, (iii) spectral location of
absorbing wavelengths, where the global warming potential of carbon dioxide is 1
Heterotrophic – organism requiring organic compounds as energy source
Lithotrophic – organism using inorganic nutrients to obtain energy
Oxic – environment where oxygen is present
Abbreviations
Anammox – anaerobic ammonium oxidation
AOB – ammonium oxidising bacteria
ATP – adenosine triphosphate
Canon – completely autotrophic nitrogen removal over nitrite
Deamox – denitrifying ammonium oxidation
DO – dissolved oxygen
FIA – flow injection analysis
MBBR – moving biofilm bed reactor
NH4 + – ammonium
NO2 − – nitrite
NO3 − – nitrate
N2O – nitrous oxide
ppm – part per million
Sharon – Single reactor system for High rate Ammonium Removal Over Nitrite)
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