Nutrient removal and plant biomass in a subsurface flow constructed wetland in Brisbane, Australia

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Title Nutrient removal and plant biomass in a subsurface flow constructed wetland in Brisbane, Australia
Author Browning, Catharine; Greenway, Margaret
Journal Name Water Science and Technology
Year Published 2003
Place of publication UK
Publisher IWA Publishing
Abstract Four native plant species (Baumea articulata, Carex fascicularis, Philydrum lanuginosum and Schoenoplectus mucronatus) are being investigated for their suitability in subsurface flow wetlands. The pilot scale Oxley Wetland, Brisbane, consists of 4 cells with different sized gravel (5 mm and 20 mm). The project aims to investigate nutrient removal rates and removal efficiency; nutrient storage in plant biomass; effect of cropping on plant regrowth, and the effect of gravel size on both water treatment and plant growth. Average daily mass removal rates ranged from 7.3 Kgha-1d-1 NH4-N in Cell D to 4.6 Kgha-1d-1 in Cell C i.e. 37%-22% removal efficiency respectively; 5.2 Kgha-1d-1 NOx-N in Cell C to 1.3 Kgha-1d-1 in Cell A (i.e. 75%-22% removal efficiency) and 0.8 Kgha-1d-1 PO4-P in Cell A to 0.1 Kgha-1d-1 in Cell C (i.e. 10%-1% removal efficiency). Cell A was the youngest wetland with new 5 mm gravel. Plant biomass was highest for Baumea and Carex. Gravel size does not appear to have affected biomass and recovery following cropping. Carex consistently had the highest harvested above ground biomass with high re-growth following cropping. Cropping appears to have retarded growth of the other three species with Schoenoplectus consistently having slowest regrowth. Plant biomass and nutrient storage wa
Peer Reviewed Yes
Published Yes
Publisher URI http://www.iwaponline.com/wst/default.htm
Alternative URI http://www.iwaponline.com/wst/04805/wst048050183.htm
Copyright Statement Copyright IWA Publishing 2003. The definitive peer-reviewed and edited version of this article is published in [name of journal] [volume issue pages year DOI] and is available at www.iwapublishing.com
Volume 48
Issue Number 5
Page from 183
Page to 190
ISSN 0273-1223
Date Accessioned 2004-03-26
Language en_AU
Faculty Faculty of Environmental Sciences
Subject PRE2009-Environmental Sciences
URI http://hdl.handle.net/10072/6093
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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