Periphyton contribution to nitrogen dynamics in the discharge from a wastewater treatment plant

River Research and Applications Volume 25 Issue 2 Page 229-235 published_at 2008-08-26
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Title ( eng )
Periphyton contribution to nitrogen dynamics in the discharge from a wastewater treatment plant
Creator
Source Title
River Research and Applications
Volume 25
Issue 2
Start Page 229
End Page 235
Abstract
To evaluate the importance of periphyton to nitrogen dynamics in the discharge from wastewater treatment plants (WWTPs), we examined changes in total and inorganic nitrogen content downstream from a WWTP on the Kurose River in Hiroshima Prefecture, Japan. At 0.7 km downstream of the WWTP (point A), NH4+-N was the dominant form of inorganic nitrogen, but concentrations decreased rapidly to 5 km downstream (point B). In contrast, no significant change in the [NO2– + NO3–]-N concentration was observed between the two points. Total nitrogen (TN) load decreased significantly between the two points, suggesting that sorption and/or denitrification occurred in the river channel. Potential rates of nitrogen sorption and transformation by periphyton were determined in a laboratory experiment in which changes in the nitrogen content of river water were examined in an acrylic chamber with periphyton. Nitrification and nitrogen removal occurred mainly in the periphyton. The contributions of periphyton activity to TN and NH4+-N decrease in the field, as estimated from the results of the laboratory experiments, were 6%–18% and 23%–72%, respectively. These results suggest that periphyton plays an important role in decreasing NH4+-N concentration in the discharge from wastewater treatment plants.
Keywords
nitrogen
periphyton
wastewater treatment plant
nitrification
ammonium nitrogen
TN
river
NDC
Pollution. Environmental engineering [ 519 ]
Language
eng
Resource Type journal article
Publisher
John Wiley & Sons
Date of Issued 2008-08-26
Rights
(c) 2008 John Wiley & Sons, Ltd.
This is the peer reviewed version of the following article: "Periphyton contribution to nitrogen dynamics in the discharge from a wastewater treatment plant", which has been published in final form at http://doi.org/10.1002/rra.1186 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Publish Type Author’s Original
Access Rights open access
Source Identifier
[ISSN] 1535-1467
[NCID] AA11657374
[DOI] 10.1002/rra.1186
[DOI] http://doi.org/10.1002/rra.1186 isVersionOf