liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Nitrous oxide exchanges with the atmosphere of a constructed wetland treating wastewater: Parameters and implications for emission factors
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
Department of Informatics/Math., Trollhattan/Uddevalla Univ. College, Sweden.
Botanical Institute, Göteborg University, Göteborg, Sweden.
Linköping University, The Tema Institute, Department of Water and Environmental Studies. Linköping University, Faculty of Arts and Sciences.
2003 (English)In: Tellus. Series B, Chemical and physical meteorology, ISSN 0280-6509, E-ISSN 1600-0889, Vol. 55, no 3, 737-750 p.Article in journal (Refereed) Published
Abstract [en]

Static chamber measurements of N2O fluxes were taken during the 1998 and 1999 growth seasons in a Swedish constructed wetland receiving wastewater. The dominating plant species in different parts of the wetland were Lemna minor L., Typha latifolia L., Spirogyra sp. and Glyceria maxima (Hartm.) and Phalaris arundinacea (L.), respectively. There were large temporal and spatial variations in N2O fluxes, which ranged from consumption at -350 to emissions at 1791 µg N2O m-2 h-1. The largest positive flux occured in October 1999 and the lowest in the middle of July 1999. The average N2O flux for the two years was 130 µg N2O m-2 h-1 (SD = 220). No significant differences in N2O fluxes were found between the years, even though the two growing seasons differed considerably with respect to both air temperature and precipitation, 15% of the fluxes were negative, showing a consumption of N2O. Consumption occured on a few occasions at most measurement sites and ranged from 1-350 µg N2O m-2 h-1, 13-43% of the variation in N2O fluxes was explained by multiple linear regression analysis including principal components. Emission factors were calculated according to IPCC methods from the N2O fluxes in the constructed wetland. The calculated emission factors were always lower (0.02-0.27%) compared to the default factor provided by the IPCC (0.75%). Thus, direct application of the IPCC default factor may lead to overestimation of N2O fluxes from constructed wastewater-treating wetlands.

Place, publisher, year, edition, pages
2003. Vol. 55, no 3, 737-750 p.
National Category
Social Sciences
Identifiers
URN: urn:nbn:se:liu:diva-46586DOI: 10.1034/j.1600-0889.2003.00034.xOAI: oai:DiVA.org:liu-46586DiVA: diva2:267482
Note

The originial title of this publication was: Nitrous oxide exchanges with the atmosphere of a constructed wetland treating wastewater : Important parameters and implications for emission factors.

Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2017-12-13Bibliographically approved
In thesis
1. Constructed Wetlands and Deconstructed Discourses: Greenhouse gas fluxes and discourses on purifying capacities
Open this publication in new window or tab >>Constructed Wetlands and Deconstructed Discourses: Greenhouse gas fluxes and discourses on purifying capacities
2002 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis is a study within the sciences ofconstructed wetlands. It has two sections. Section one is a natural scienrific study ofgas fluxes from construcred wetlands and section two is an analysis ofhow natural sciences describe constructed wetlands.

The aim of section one was to determine methane and nitrous oxide fluxes between the atmosphere and constructed wetlands. The result from these gas flux studies showed that methane fluxes ranged between -375 and 1739 mg m-2 day1, whereas the nitrous oxide fluxes ranged from consumption at -350 to emissions at 1791 Jlg m-2 h-1. The annual inregrated methane fluxes were 87 mg m-2 day1, whereas the inregrated nitrous oxide fluxes resulred in an overall average of 126 µg N2O m-2 h-1. There were large temporal and spatial variations in gas fluxes but no differences between night and day. The methane rates were lower than the average rate, 225 mg m-2 day1, found at a constructed pilot scale wetland treating dairy wastewater in New Zealand (Tanner, 1997), but the cited measuremenrs were only taken during one monrh in mid-summer. The average and range of methane flux values in my study also showed that the methane emission rates were of the same magnitude as those observed from natural wetlands with similar vegetational composition. The nitrous oxide emissions observed in the Nykvarn study were ca. three to ten times higher than in previous studies of constructed wetlands treating wastewater, whereas the nitrous oxide consumption rate was approximately 80 times higher. The nitrous oxide fluxes were 3 to 180 times higher compared to other wetland systems. Emission factors were calculated according to the methods presenred by the Inrergovernmenral Panel of Climate Change (IPCC). The calculated nitrous oxide emission factors from Nykvarn were always lower (0.02 to 0.27%) compared to the default factor provided by the IPCC (0.75%).

The aim of section two was to analyse descriptions on purifying capacities in constructed wetlands in selected scienrific articles. This was made with help of a discourse analysis, which can be explained as a study of communication. The results from this analysis showed that the wetlands were described in terms of self-purifying, biochemical cycles. The cycle concept is used in all three discourses (case I to 3) but it is comprehended differently. In case I the cycling processes are treated as inrrinsic and unproblematic in relation to purification. In case 2, the purifying cycles are treated as dynamic, complex and problematic, but humans could influence them and develop their inrrinsic ability. In case 3 th~ cycling processes became a tool, allowing us to grasp, handle, act upon and influence the wetlands. In the thesis these differences are discussed with respecr to scienrific ideals including language in general and metaphors and concepts in parricular as weil as to the ambiguous relationship between humans and wetlands. Finally, the thesis conrain a reflection on the studies discussed in section I and II. The reflection aims at developing new paths for of gas flux investigations (with biosemiotic perspectives) in research fields related to constructed wetlands.

Place, publisher, year, edition, pages
Linköping: Linköpings universitet, 2002. 106 p.
Series
Linköping Studies in Arts and Science, ISSN 0282-9800 ; 253
Keyword
växthuseffekter, vattenrening, miljöaspekter
National Category
Social Sciences Interdisciplinary
Identifiers
urn:nbn:se:liu:diva-29577 (URN)14953 (Local ID)91-7373-321-0 (ISBN)14953 (Archive number)14953 (OAI)
Public defence
2002-04-26, Elysion, Hus T, Campus VAlla, Linköpings universitet, Linköping, 10:15 (English)
Supervisors
Available from: 2009-10-09 Created: 2009-10-09 Last updated: 2014-08-29Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Authority records BETA

Johansson, ElisabethSvensson, Bo

Search in DiVA

By author/editor
Johansson, ElisabethSvensson, Bo
By organisation
Department of Water and Environmental StudiesFaculty of Arts and Sciences
In the same journal
Tellus. Series B, Chemical and physical meteorology
Social Sciences

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 157 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf