Title
Strategies to mitigate <tex>$N_{2}O$</tex> emissions from biological nitrogen removal systems Strategies to mitigate <tex>$N_{2}O$</tex> emissions from biological nitrogen removal systems
Author
Faculty/Department
Faculty of Sciences. Bioscience Engineering
Publication type
article
Publication
Chicago, Ill. ,
Subject
Chemistry
Biology
Engineering sciences. Technology
Source (journal)
Current opinion in biotechnology. - Chicago, Ill.
Volume/pages
23(2012) :3 , p. 474-482
ISSN
0958-1669
ISI
000305862100025
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
N2O emissions from the biological treatment of sewage, manure, landfill leachates and industrial effluents have gained considerable interest among policy makers and environmental scientists. Estimated global emission rates from these sources can contribute up to 10% of the anthropogenic N2O emissions. Particularly at the level of a treatment plant, the N2O impact can be very significant and reach up to 80% of the operational CO2 footprint. Imperfect nitritation by an imbalance in the two-step nitritation metabolism of ammonia-oxidizing bacteria is considered as the main contributor to N2O production with hydroxylamine and particularly nitrite as key precursors. Monitoring of these compounds is warranted to understand and abate N2O emissions. Mitigation strategies should also comprise optimizations of the process parameters as well as bio-augmentative approaches empowered to restore the functional capacity and to deal with unwanted accumulation of intermediates. These strategies require validation for their effectiveness and costs at full-scale.
E-info
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