Removal of Fungal Spores using Constructed Wetlands
Treatment of Irrigation Runoff from Tree Nurseries
Constructed Wetlands
Pilot Plant |
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Type
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Horizontal Subsurface Flow, 8 mesocosms
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Surface area
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0.784 m²
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Depth
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0.5 m (water level)
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Length x Width
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1.12 m x 0.72 m
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Hydraulic Loading
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0.1 m³/m².day (in 8 pumping cycles per day)
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Filtration Materials
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2 x lightweight expanded clay 0/4; 2 x gravel 2/12; 2 x gravel/sand/gravel; 2 x coarse
sand
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Vegetation
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Phragmites australis, Iris pseudacorus
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A pilot plant was built to treat part of the irrigation runoff from the tree nursery of the department of Agro- and
Biotechnology K.H.Kempen. Horizontal subsurface flow systems were used. A venturi system could be used to
inoculate and mix the water with fungal spores, immediately before entering the mesocosms.
Four different types of filtration materials were evaluated: lightweight expanded clay, gravel, gravel/sand/gravel and
sand. The vegetation consisted of Phragmites australis and Iris pseudacorus. Five types of fungal spores were
chosen for the tests: Verticillium, Fusarium, Thielaviopsis, Pythium and Phytophthora.
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