Assessing potential impacts of phosphate precipitation on nitrous oxide emissions and the carbon footprint of wastewater treatment plants

2018 ◽  
Vol 40 (16) ◽  
pp. 2107-2113 ◽  
Author(s):  
Pascal Kosse ◽  
Manfred Lübken ◽  
Torsten C. Schmidt ◽  
Ruben-Laurids Lange ◽  
Marc Wichern
Keyword(s):  
Nitrous Oxide ◽  
Wastewater Treatment ◽  
Carbon Footprint ◽  
Wastewater Treatment Plants ◽  
Nitrous Oxide Emissions

Methane and nitrous oxide emissions from municipal wastewater treatment – results from a long-term study

2013 ◽  
Vol 67 (10) ◽  
pp. 2350-2355 ◽  
Author(s):  
M. R. J. Daelman ◽  
E. M. van Voorthuizen ◽  
L. G. J. M. van Dongen ◽  
E. I. P. Volcke ◽  
M. C. M. van Loosdrecht
Keyword(s):  
Carbon Dioxide ◽  
Nitrous Oxide ◽  
Wastewater Treatment ◽  
Carbon Footprint ◽  
Municipal Wastewater ◽  
Carbon Dioxide Emission ◽  
Treatment Plant ◽  
Nitrous Oxide Emissions ◽  
Municipal Wastewater Treatment ◽  
Long Term Study

Methane and nitrous oxide emissions from a fully covered municipal wastewater treatment plant were measured on-line during 16 months. At the plant under study, nitrous oxide contributed three-quarters to the plant's carbon footprint, while the methane emission was slightly larger than the indirect carbon dioxide emission related to the plant's electricity and natural gas consumption. This contrasted with two other wastewater treatment plants, where more than 80% of the carbon footprint came from the indirect carbon dioxide emission. The nitrous oxide emission exhibited a seasonal dynamic, of which the cause remains unclear. Three types of air filter were investigated with regard to their effectiveness to remove methane from the off-gas.

scholarly journals Nitrous oxide emissions from wastewater treatment processes

2012 ◽  
Vol 367 (1593) ◽  
pp. 1265-1277 ◽  
Author(s):  
Yingyu Law ◽  
Liu Ye ◽  
Yuting Pan ◽  
Zhiguo Yuan
Keyword(s):  
Nitrous Oxide ◽  
Wastewater Treatment ◽  
Wastewater Treatment Plants ◽  
High Water ◽  
Nitrous Oxide Emissions ◽  
Ammonia Oxidizing Bacteria ◽  
Plant Design ◽  
Operational Conditions ◽  
Nitrifier Denitrification ◽  
Wastewater Treatment Systems

Nitrous oxide (N 2 O) emissions from wastewater treatment plants vary substantially between plants, ranging from negligible to substantial (a few per cent of the total nitrogen load), probably because of different designs and operational conditions. In general, plants that achieve high levels of nitrogen removal emit less N 2 O, indicating that no compromise is required between high water quality and lower N 2 O emissions. N 2 O emissions primarily occur in aerated zones/compartments/periods owing to active stripping, and ammonia-oxidizing bacteria, rather than heterotrophic denitrifiers, are the main contributors. However, the detailed mechanisms remain to be fully elucidated, despite strong evidence suggesting that both nitrifier denitrification and the chemical breakdown of intermediates of hydroxylamine oxidation are probably involved. With increased understanding of the fundamental reactions responsible for N 2 O production in wastewater treatment systems and the conditions that stimulate their occurrence, reduction of N 2 O emissions from wastewater treatment systems through improved plant design and operation will be achieved in the near future.

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