Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2015 Dec;22(24):19933-9.
doi: 10.1007/s11356-015-5210-3. Epub 2015 Aug 21.

Emissions of NO and N2O in wetland microcosms for swine wastewater treatment

Shunan Zhang  1   2   3 , Feng Liu  4   5 , Runlin Xiao  1   2 , Yong Li  1   2 , Juan Zhou  1   2   3 , Jinshui Wu  6   7
Affiliations

Emissions of NO and N2O in wetland microcosms for swine wastewater treatment

Shunan Zhang et al. Environ Sci Pollut Res Int. 2015 Dec.

Abstract

Nitric oxide (NO) and nitrous oxide (N2O) emitted from wetland systems contribute an important proportion to the global warming effect. In this study, four wetland microcosms vegetated with Myriophyllum elatinoides (WM), Alternanthera philoxeroides (WA), Eichhornia crassipes (WE), or without vegetation (NW) were compared to investigate the emissions of NO and N2O during nitrogen (N) removal process when treating swine wastewater. After 30-day incubation, TN removal rates of 96.4, 74.2, 97.2, and 47.3 % were observed for the WM, WA, WE, and NW microcosms, respectively. Yet, no significant difference was observed in WM and WE (p > 0.05). The average NO and N2O emissions in WE was significantly higher than those in WM, WA, and NW (p < 0.05). In addition, the emission of N2O in WE accounted for 2.10 % of initial TN load and 2.17 % of the total amount of TN removal, compared with less than 1 % in the other microcosms. These findings indicate that wetland vegetated with M. elatinoides may be an optimal system for swine wastewater treatment, based on its higher removal of N and lower emissions of NO and N2O.

Keywords: Constructed wetland; Greenhouse gas; N removal; Nitric oxide; Nitrous oxide.

PubMed Disclaimer

References

    1. Bioresour Technol. 2009 Jun;100(12):2910-7 - PubMed
    1. Sci Total Environ. 2007 Jul 15;380(1-3):28-37 - PubMed
    1. Water Sci Technol. 2003;48(5):135-42 - PubMed
    1. Water Res. 2001 Mar;35(3):657-64 - PubMed
    1. Water Res. 2004 Nov;38(18):3960-70 - PubMed

Publication types

MeSH terms

LinkOut - more resources