General Application
See also: Reed bedThe three types, using reed beds (constructed wetlands but using principally reed plants), are used. All these systems are used commercially, usually together with septic tanks as primary treatment, Imhoff tanks or screeners in order to separate the solids from the liquid effluent). Some designs however are being used to act as primary treatment as well. An other way is the combination Constructed wetland- Composting toilet.
System types are:
- Surface flow (SF) Constructed Wetland (or reed bed)
- Sub Surface Flow (SSF) Constructed Wetland (or reed bed)
- Vertical Flow (VF) Constructed Wetland (or reed bed)
All three types are placed in a basin with a substrate. For most undertakings the bottom is lined with either a geomembrane (kind of rubber / plastic), concrete or clay (when there is appropriate clay type)in order to protect the water table and surrounding grounds. The substrate can be either gravel - generally limestone or pumice/volcanic rock, depending on local availability or sand or a mixture of various sizes of media (for vertical flow constructed wetlands).
Read more about this topic: Constructed Wetland
Famous quotes containing the words general and/or application:
“It was the words “descended into Hades”
That seemed too pagan to our liberal youth.
You know they suffered from a general onslaught.
And well, if they weren’t true why keep right on
Saying them like the heathen? We could drop them.”
—Robert Frost (1874–1963)
“My business is stanching blood and feeding fainting men; my post the open field between the bullet and the hospital. I sometimes discuss the application of a compress or a wisp of hay under a broken limb, but not the bearing and merits of a political movement. I make gruel—not speeches; I write letters home for wounded soldiers, not political addresses.”
—Clara Barton (1821–1912)