Abstract
This chapter discusses the use of natural and constructed wetlands for treatment of wastewaters. Mechanisms of treatment processes for wetlands were described. Function, roles, types, and selection of wetland plants were discussed. The chapter also covers design, monitoring, and maintenance of wetland treatment systems for wastewater. Case studies in the United States, Malaysia, and the United Kingdom were discussed. Pollution control and water reuse for watershed protection and environmental conservation are emphasized.
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- AN:
-
Ammoniacal nitrogen
- A s :
-
Surface area of wetland (m2)
- BOD:
-
Biochemical oxygen demand (mg/L)
- C:
-
Carbon
- C e :
-
Effluent pollutant concentration (mg/L)
- CH4 :
-
Methane
- C o :
-
Influent pollutant concentration (mg/L)
- CO2 :
-
Carbon dioxide
- COD:
-
Chemical oxygen demand
- d m :
-
Depth of media (m)
- d w :
-
Depth of water from media surface (m)
- EPA:
-
Environmental Protection Agency
- FWS:
-
Free water surface
- HFS:
-
Horizontal flow system
- HLR:
-
Hydraulic loading rate (m/day)
- HRT:
-
Hydraulic retention time
- k 20 :
-
Rate constant at 20 °C (day−1)
- k T :
-
Temperature-dependent first-order reaction rate constant (day−1)
- L :
-
Length of the wetland cell (m)
- n :
-
Porosity or the space available for water to flow through the wetland (decimal)
- N:
-
Nitrogen
- N2 :
-
Nitrogen
- N2O:
-
Nitrous oxide
- NH3 :
-
Free ammonia (mg/L)
- NH4 + :
-
Ammonium ion
- NH4eff :
-
Effluent ammonia (mg/L)
- NO2 :
-
Nitrogen dioxide
- NO2 − :
-
Nitrite
- NO3 − :
-
Nitrate
- NO3eff :
-
Effluent nitrate (mg/L)
- NO3inf :
-
Influent nitrate (mg/L)
- O2 :
-
Oxygen
- P:
-
Phosphorus
- Q :
-
The average flow through the wetland (m3/day)
- RRF:
-
Rock-reed filter
- rz:
-
The percent of wetland bed depth occupied by root zone (decimal)
- RZM:
-
Root-zone method
- SF:
-
Surface flow
- spp.:
-
Species
- SS:
-
Suspended solids (mg/L)
- SSe :
-
Effluent SS (mg/L)
- SSF:
-
Subsurface flow
- SSo :
-
Influent SS (mg/L)
- t :
-
Hydraulic retention time (day)
- T :
-
Temperature
- TKN:
-
Influent Kjeldahl nitrogen (mg/L)
- TN:
-
Total nitrogen
- TSS:
-
Total suspended solids
- US:
-
United States
- V :
-
Volume of water in the system (m3)
- VFS:
-
Vertical flow system
- VSB:
-
Vegetated submerged bed
- W :
-
Width of the wetland cell (m)
- °C:
-
Degree Celsius (centigrade) (°C)
- θ :
-
Temperature coefficient
References
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Glossary of Wetland
- Ambient monitoring
-
Monitoring within natural systems (e.g., lakes, rivers, estuaries, wetlands) to determine existing conditions.
- Constructed wetland or created wetland
-
A wetland at a site where it did not formerly occur. Constructed/created wetlands are designed to meet a variety of human benefits including, but not limited to, the treatment of water pollution discharges (e.g., municipal wastewater, stormwater) and the mitigation of wetland losses permitted under Section 404 of the Clean Water Act.
- Enhancement
-
An activity increasing one or more natural or artificial wetland functions. For example, the removal of a point source discharge impacting a wetland.
- Functions
-
The role wetlands serve which are of value to society or the environment.
- Habitat
-
The environment occupied by individuals of a particular species, population, or community.
- Hydrology
-
The science dealing with the properties, distribution, and circulation of water both on the surface and under the earth.
- Restoration
-
An activity returning a wetland from a disturbed or altered condition with lesser acreage or functions to a previous condition with greater wetland acreage or functions. For example, restoration might involve the plugging of a drainage ditch to restore the hydrology to an area that was a wetland before the installation of the drainage ditch.
- Riparian
-
Areas next to or substantially influenced by water. These may include areas adjacent to rivers, lakes, or estuaries. These areas often include wetlands.
- Upland
-
Any area that does not qualify as wetland because the associated hydrological regime is not sufficiently wet to elicit development of vegetation, soils, and/or hydrological characteristics associated with wetlands or is defined as open waters.
- Wetlands
-
Those areas that are inundated or saturated by surface or groundwater at a frequency and duration sufficient to support, and that under normal circumstances do support, a prevalence of vegetation typically adapted for life in saturated soil conditions. Wetland generally includes swamps, marshes, bogs, and similar areas.
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Idris, A., Abdullah, A.G.L., Hung, YT., Wang, L.K. (2014). Wetlands for Wastewater Treatment and Water Reuse. In: Wang, L., Yang, C. (eds) Modern Water Resources Engineering. Handbook of Environmental Engineering, vol 15. Humana Press, Totowa, NJ. https://doi.org/10.1007/978-1-62703-595-8_13
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DOI: https://doi.org/10.1007/978-1-62703-595-8_13
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