Optimizing N- and P-reduction in wastewater using constructed wetlands
Rob Van Deun, Mia Van Dyck

Katholieke Hogeschool Kempen, Geel, Belgium
Department Agro- and Biotechnology

2007-2010

Pilot Plant

Type
Vertical Subsurface Flow, 12 mesocosms
Surface area
1 m
Hydraulic Loading
0.05 m/m.day (in 2 pumping cycles per day)
Filtration Column
0.8 m
Filtration Materials
10 x coarse sand; 1 x gravel 2/12; 1 x Lightweight Expanded Clay Aggregate
Vegetation
Phragmites australis, Miscanthus floridulus, Sparganium erectum, Scirpus lacustris,
Iris pseudacorus, Eriophorum angustifolium, Carex riparia, unplanted control
Type
Horizontal Subsurface Flow, 2 mesocosms, second stage after VSSF
Surface area
1.5 m
Depth
0.5 m (water level)
Length x Width
2.5 m x 0;6 m
Filtration Materials
Gravel 2/12
Vegetation
Phragmites australis, Carex pendula
"Expanded clay and lava rock as potential filter media for nutrient removal in vertical subsurface
flow constructed wetlands"
Rob Van Deun, Mia Van Dyck
SWS Society of Wetland Scientists European Chapter Meeting, 29th June - 3rd July 2008,
Kuressaare, Saaremaa, Estonia
"Coco products and peat as potential filter media for nutrient removal in vertical subsurface flow
constructed wetlands"
Rob Van Deun, Mia Van Dyck
IWA  WETLAND 2008 11th International Conference on Wetland Systems for Water Pollution
Control, November 1-7, Indore, India
"On-site wastewater treatment in Flanders,  opportunities and threats for constructed wetlands"
Mia Van Dyck, Rob Van Deun
IWA Decentralized Water and Wastewater International Network (DEWSIN), Kathmandu, Nepal
2009
Research objective:
To develop and test strategies to reduce the N- and P-content in wastewater using different types of constructed
wetlands.
Methods:
This research looks at the possibilities of different plant species, different filter materials and different types of
constructed wetlands to improve the reduction of the nutrient content in wastewater.
A pilot plant is fed with domestic wastewater. The inluent and the different effluents are examined for pH,
conductivity, NH4+-N, NO3--N, total P, BOD and COD. A water balance will be made for each constructed wetland.
Meterological data will be collected. The development of the vegetation will be evaluated.
Expected results:
This research should lead to a set of conditions that can be used to optimize the nutrient removal in wastewater
using constructed wetlands.
Constructed Wetlands