Comparison of methods for nitrous oxide emission estimation in full-scale activated sludge

Nitrous oxide (N2O) gas transfer was studied in a full-scale process to correlate liquid phase N2O concentrations with gas phase N2O emissions and compare methods of determining the volumetric mass transfer coefficient, KLa. Off-gas and liquid phase monitoring were conducted at the Viikinmäki wastew...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Shanna Myers, Anna Mikola, Kati Blomberg, Anna Kuokkanen, Diego Rosso
Formato: article
Lenguaje:EN
Publicado: IWA Publishing 2021
Materias:
Acceso en línea:https://doaj.org/article/34dc557e6d064459b1c18be03ef99f0b
Etiquetas: Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
id oai:doaj.org-article:34dc557e6d064459b1c18be03ef99f0b
record_format dspace
spelling oai:doaj.org-article:34dc557e6d064459b1c18be03ef99f0b2021-11-06T10:42:33ZComparison of methods for nitrous oxide emission estimation in full-scale activated sludge0273-12231996-973210.2166/wst.2021.033https://doaj.org/article/34dc557e6d064459b1c18be03ef99f0b2021-02-01T00:00:00Zhttp://wst.iwaponline.com/content/83/3/641https://doaj.org/toc/0273-1223https://doaj.org/toc/1996-9732Nitrous oxide (N2O) gas transfer was studied in a full-scale process to correlate liquid phase N2O concentrations with gas phase N2O emissions and compare methods of determining the volumetric mass transfer coefficient, KLa. Off-gas and liquid phase monitoring were conducted at the Viikinmäki wastewater treatment plant (WWTP) over a two-week period using a novel method for simultaneous measurement of dissolved and off-gas N2O and O2 from the same location. KLa was calculated with three methods: empirically, based on aeration superficial velocity, from experimentally determined O2 KLa, and using a static value of best fit. The findings of this study indicated trends in local emitted N2O consistently matched trends in local dissolved N2O, but the magnitude of N2O emissions could not be accurately estimated without correction. After applying a static correction factor, the O2 method, using experimentally determined O2 KLa, provided the best N2O emission estimation over the data collection period. N2O emissions estimated using the O2 method had a root mean square error (RMSE) of 70.5 compared against measured concentrations ranging from 3 to 1,913 ppm and a maximum 28% error. The KLa value, and therefore the method of KLa determination, had a significant impact on estimated emissions.Shanna MyersAnna MikolaKati BlombergAnna KuokkanenDiego RossoIWA Publishingarticlefull-scalegas transfergreenhouse gasesnitrous oxideoff-gaswastewater treatmentEnvironmental technology. Sanitary engineeringTD1-1066ENWater Science and Technology, Vol 83, Iss 3, Pp 641-651 (2021)
institution DOAJ
collection DOAJ
language EN
topic full-scale
gas transfer
greenhouse gases
nitrous oxide
off-gas
wastewater treatment
Environmental technology. Sanitary engineering
TD1-1066
spellingShingle full-scale
gas transfer
greenhouse gases
nitrous oxide
off-gas
wastewater treatment
Environmental technology. Sanitary engineering
TD1-1066
Shanna Myers
Anna Mikola
Kati Blomberg
Anna Kuokkanen
Diego Rosso
Comparison of methods for nitrous oxide emission estimation in full-scale activated sludge
description Nitrous oxide (N2O) gas transfer was studied in a full-scale process to correlate liquid phase N2O concentrations with gas phase N2O emissions and compare methods of determining the volumetric mass transfer coefficient, KLa. Off-gas and liquid phase monitoring were conducted at the Viikinmäki wastewater treatment plant (WWTP) over a two-week period using a novel method for simultaneous measurement of dissolved and off-gas N2O and O2 from the same location. KLa was calculated with three methods: empirically, based on aeration superficial velocity, from experimentally determined O2 KLa, and using a static value of best fit. The findings of this study indicated trends in local emitted N2O consistently matched trends in local dissolved N2O, but the magnitude of N2O emissions could not be accurately estimated without correction. After applying a static correction factor, the O2 method, using experimentally determined O2 KLa, provided the best N2O emission estimation over the data collection period. N2O emissions estimated using the O2 method had a root mean square error (RMSE) of 70.5 compared against measured concentrations ranging from 3 to 1,913 ppm and a maximum 28% error. The KLa value, and therefore the method of KLa determination, had a significant impact on estimated emissions.
format article
author Shanna Myers
Anna Mikola
Kati Blomberg
Anna Kuokkanen
Diego Rosso
author_facet Shanna Myers
Anna Mikola
Kati Blomberg
Anna Kuokkanen
Diego Rosso
author_sort Shanna Myers
title Comparison of methods for nitrous oxide emission estimation in full-scale activated sludge
title_short Comparison of methods for nitrous oxide emission estimation in full-scale activated sludge
title_full Comparison of methods for nitrous oxide emission estimation in full-scale activated sludge
title_fullStr Comparison of methods for nitrous oxide emission estimation in full-scale activated sludge
title_full_unstemmed Comparison of methods for nitrous oxide emission estimation in full-scale activated sludge
title_sort comparison of methods for nitrous oxide emission estimation in full-scale activated sludge
publisher IWA Publishing
publishDate 2021
url https://doaj.org/article/34dc557e6d064459b1c18be03ef99f0b
work_keys_str_mv AT shannamyers comparisonofmethodsfornitrousoxideemissionestimationinfullscaleactivatedsludge
AT annamikola comparisonofmethodsfornitrousoxideemissionestimationinfullscaleactivatedsludge
AT katiblomberg comparisonofmethodsfornitrousoxideemissionestimationinfullscaleactivatedsludge
AT annakuokkanen comparisonofmethodsfornitrousoxideemissionestimationinfullscaleactivatedsludge
AT diegorosso comparisonofmethodsfornitrousoxideemissionestimationinfullscaleactivatedsludge
_version_ 1718443787067326464