Syntrophy of aerobic and anaerobic ammonia oxidisers

Deammonification is known as an efficient and resource saving sidestream process option to remove the nitrogen load from sludge liquors. The transfer of the intermediate product nitrite between both syntrophic groups of organisms - aerobic and anaerobic ammonia oxidizers (AOB) - appears very sensiti...

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Bibliographic Details
Published in:Water science and technology 2010-01, Vol.61 (8), p.1915-1922
Main Authors: Wett, B, Hell, M, Nyhuis, G, Puempel, T, Takacs, I, Murthy, S
Format: Article
Language:English
Subjects:
Aerobiosis
Ammonia
Ammonia - metabolism
Ammonium
Anaerobic conditions
Anaerobic processes
Anaerobiosis
Bacteria, Aerobic - metabolism
Bacteria, Anaerobic - metabolism
Dissolved oxygen
Growth kinetics
Kinetics
Low temperature
Mixed liquor solids
Oxidation-Reduction
Oxidizing agents
Pollution load
Population Dynamics
Retention time
Sludge
Temperature
Waste Management
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Summary:Deammonification is known as an efficient and resource saving sidestream process option to remove the nitrogen load from sludge liquors. The transfer of the intermediate product nitrite between both syntrophic groups of organisms - aerobic and anaerobic ammonia oxidizers (AOB) - appears very sensitive to process conditions such as temperature, dissolved oxygen (DO) and operating nitrite level. Growth kinetics for aerobic and anaerobic AOBs differ by one order of magnitude and require an adequate selection of sludge retention time. This paper provides measurement- and model-based results on how selected sludge wasting impacts population dynamics in a suspended growth deammonification system. Anammox enrichment up to a doubled portion in mixed liquor solids can substantially improve process stability in difficult conditions. A case-study on low temperature operations outlines two possible strategies to balance syntrophic consumption of ammonium and nitrite.
ISSN:0273-1223
1996-9732
DOI:10.2166/wst.2010.969