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Wastewater Treatment
Technology Tutorial
Constructed
Wetlands
Scientists have long recognized the abilities of
wetlands to purify water. Through the correct sequencing
of base media, plant species, and microbe species,
constructed wetlands can successfully reduce
nitrogen content, filter out solids, and reduce the
presence of heavy metals.
 The
type and amount of pollutant removed depends upon
the species and oxygen affinity of the organisms present
in the wetland. Wetlands utilize physical and chemical
processes to clean wastewater and typically serve
as the Secondary and Tertiary steps.
Although constructed wetlands tend to take
up a great deal of space, they require less investment
of time and money than traditional waste treatment
procedures. Ultimately, constructed wetlands are a
cost-effective and environmentally-benign method of
wastewater processing.
Source:
Gopal, Brig.
"Natural and Constructed Wetlands for Wastewater
Treatment." Water Sci Tech. Vol. 40, No.
3, 27-35. 1999. Image
credit: NC
State University
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