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| |Schematic of a vertical subsurface flow constructed wetland: Water flows through pipes on the subsurface of the ground through the root zone to the ground. | | |Schematic of a vertical subsurface flow constructed wetland: Water flows through pipes on the subsurface of the ground through the root zone to the ground. |
| |- | | |- |
− | |Soil
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− | |
| |
| |style="text-align:left;"|'''Pros''' | | |style="text-align:left;"|'''Pros''' |
− | *High levels of treatement possible | + | |style="text-align:left;"|'''Pros''' |
− | *DIY possible | + | *Well established technology |
| + | *Low cost |
| + | *May be natural looking |
| + | *Need little to no gradient |
| + | *Provides buffer to discharge |
| + | *Good pathogen removal from die off and predation |
| + | *Minimal maintenance |
| + | *Wide range of plants suitable |
| + | *Robust |
| + | |style="text-align:left;"|'''Pros''' |
| + | *High levels of treatment possible |
| + | *DIY possible (to lower cost) |
| *May be run without power if significant gradient is avaialble | | *May be run without power if significant gradient is avaialble |
| *Can be attractively designed to generate interest in the technology. | | *Can be attractively designed to generate interest in the technology. |
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| *Biologically complex and robust | | *Biologically complex and robust |
| *Failure tends to be gradual | | *Failure tends to be gradual |
− | *Will function prior to establishment of vegitation | + | *Will function prior to establishment of vegetation |
| |- | | |- |
| | | | | |
| |style="text-align:left;"|'''Cons''' | | |style="text-align:left;"|'''Cons''' |
| + | *Requires more land |
| + | |style="text-align:left;"|'''Cons''' |
| + | *Requires fall of at least 1.5 m to provide sufficient treatment |
| + | *May be high cost |
| + | *Sensitive to hydraulic overloading |
| |- | | |- |
| |Maintenance||Medium to high||Low | | |Maintenance||Medium to high||Low |