Unit processes of stormwater treatment techniques Unit processes of stormwater treatment techniques

Unit processes of stormwater treatment techniques (Adapted from WEF, 2008)
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Control	Infiltration basin	Infiltration trench	Bioinfiltration	Permeable pavement	Tree box/tree trench	Enhanced turf
Peak flow attenuation	X	X	X	X
Runoff volume reduction	X	X	X	X	X
Infiltration	X	X	X	X	X	X
Dispersion
Evapotranspiration			X		X
Runoff collection and usage			X1	X1
Sedimentation	X	X	X
Flotation	X		X
Laminar separation
Swirl concentration
Sorption	X	X	X	X
Precipitation	X	X	X	X
Coagulation	X	X	X	X
Filtration			X
Plant metabolism			X		X	X
Nitrification/denitrification	X	X	X
Organic compound degradation	X	X	X	X
Pathogen die off	X	X		X
Temperature reduction	X	X	X	X
Disinfection	X	X	X	X

¹ If underdrain is present