Oxygen transfer and consumption in subsurface flow treatment wetlands

2013 ◽  
Vol 61 ◽  
pp. 544-554 ◽  
Author(s):  
Jaime Nivala ◽  
Scott Wallace ◽  
Tom Headley ◽  
Kinfe Kassa ◽  
Hans Brix ◽  
...  
Keyword(s):  
Oxygen Transfer ◽  
Subsurface Flow ◽  
Treatment Wetlands ◽  
Flow Treatment

Dissolved Phosphorus Retention of Light-Weight Expanded Shale and Masonry Sand Used in Subsurface Flow Treatment Wetlands

2004 ◽  
Vol 38 (3) ◽  
pp. 892-898 ◽  
Author(s):  
Margaret G. Forbes ◽  
Kenneth R. Dickson ◽  
Teresa D. Golden ◽  
Paul Hudak ◽  
Robert D. Doyle
Keyword(s):  
Subsurface Flow ◽  
Treatment Wetlands ◽  
Light Weight ◽  
Phosphorus Retention ◽  
Dissolved Phosphorus ◽  
Expanded Shale ◽  
Masonry Sand ◽  
Flow Treatment

Plants as ecosystem engineers in subsurface-flow treatment wetlands

2001 ◽  
Vol 44 (11-12) ◽  
pp. 9-17 ◽  
Author(s):  
C.C. Tanner
Keyword(s):  
Root Zone ◽  
Subsurface Flow ◽  
Ecosystem Engineers ◽  
Treatment Wetlands ◽  
Balance Performance ◽  
Key Factors ◽  
Organic Matter Production ◽  
Matter Production ◽  
Solids Removal ◽  
Flow Treatment

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 fraction of the improved removal shown by planted systems. Roles of plants as ecosystem engineers are summarised, with organic matter production and root-zone oxygen release identified as key factors influencing nutrient transformation and sequestration.

Nitrogen processing gradients in subsurface-flow treatment wetlands—influence of wastewater characteristics

2002 ◽  
Vol 18 (4) ◽  
pp. 499-520 ◽  
Author(s):  
Chris C. Tanner ◽  
Robert H. Kadlec ◽  
Max M. Gibbs ◽  
James P.S. Sukias ◽  
M.Long Nguyen
Keyword(s):  
Subsurface Flow ◽  
Treatment Wetlands ◽  
Flow Treatment

scholarly journals Performance of a Pilot Subsurface Flow Treatment Wetland System, Used for Arsenic Removal from Reverse Osmosis Concentrate, in the Municipality of Julimes, Chihuahua, Mexico

2020 ◽  
Vol 24 ◽  
Author(s):  
Mario Alberto Olmos-Márquez ◽  
Jesús Manuel Ochoa-Rivero ◽  
María Teresa Alarcón-Herrera ◽  
Eduardo Santellano-Estrada ◽  
José Humberto Vega-Mares ◽  
...  
Keyword(s):  
Reverse Osmosis ◽  
Constructed Wetlands ◽  
Arsenic Removal ◽  
Arsenic Concentration ◽  
Subsurface Flow ◽  
Treatment Wetlands ◽  
Agricultural Irrigation ◽  
Treatment Wetland ◽  
Wetland System ◽  
Flow Treatment

The objective of this study was to implement a pilot system of treatment wetlands, using phytoremediation as an alternative technology to remove arsenic from the concentrate of a reverse osmosis system. The pilot system was composed of two subsurface flow constructed wetlands, planted with Eleocharis macrostachya and Shoenoplectus americanus. The wetlands were fed concentrate from a reverse osmosis system for seven months, with an average flow of 962 Ld-1 and an average arsenic concentration of 0.241 mgL-1. Removal rates between 43 % and 86 % were obtained for wetland 1 and between 35 % and 79 % for wetland 2 throughout the experiment. The two plant species developed normally despite the high levels of electrical conductivity in the range of 3584 to 5455 µscm-1 in wetland intake waters. The pilot wetland system removed significant levels of arsenic from the reverse osmosis concentrate, resulting in arsenic levels in the output waters that meet Mexican standard for using water in agricultural irrigation.

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