Controlling and Monitoring Flow in Treatment Wetlands Using Weirs

Subsurface Flow Constructed Wetlands for Wastewater Treatment

Threshold Submergence of Flow over PK Weirs

In this study an extensive experimental research is carried out to develop a better understanding of the effects of Piano Key (PK) weir geometry on weir flow threshold submergence. Experiments were conducted in a 12 m long, 0.4 m wide and 0.7 m deep rectangular glass wall flume. The main objectives were to investigate the effect of the PK weir geometries including the weir length, weir height, ...

Plants as ecosystem engineers in subsurface-flow treatment wetlands.

Mass balance performance data from side by side studies of planted and unplanted gravel-bed treatment wetlands with horizontal subsurface-flow are compared. Planted systems showed enhanced nitrogen and initial phosphorus removal, but only small improvements in disinfection, BOD, COD and suspended solids removal. Direct nutrient uptake by plants was insufficient to account for more than a fracti...

Treatment of Woodwaste Leachate in Surface Flow Mesocosm Wetlands

1Environmental Science and Engineering Program, University of Northern British Columbia, 3333 University Way, Prince George, British Columbia V2N 4Z9 2Department of Civil Engineering, University of British Columbia, 6250 Applied Science Lane, Vancouver, British Columbia V6T 1Z4 3Department of Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, British...

Residential subsurface flow treatment wetlands in northern Minnesota.

Approximately 30% of Minnesotans use on-site systems (approximately 500,000 residences) and >50% are failing or non-compliant with regulations due to restrictive soils and site conditions. Many sites occur near lakes and streams creating health hazards and deteriorating water quality. SSF CWs have been evaluated year-round at two northern sites since 1995. The NERCC CWs simulate single homes an...