FileDownLoad,24931,en.pdf (Objet application/pdf) Constructed wetland. Vertical flow type of constructed wetlands A constructed wetland or wetpark is an artificial wetland created as a new or restored habitat for native and migratory wildlife, for anthropogenic discharge such as wastewater, stormwater runoff, or sewage treatment, for land reclamation after mining, refineries, or other ecological disturbances such as required mitigation for natural areas lost to a development. Biofiltration[edit] Newly planted constructed wetland Same constructed wetland, two years later Vegetation in a wetland provides a substrate (roots, stems, and leaves) upon which microorganisms can grow as they break down organic materials.
Wetlands types[edit] See also General application below Natural wetlands[edit] Ramsar Classification System for Wetland Type—Ramsar Convention Subsurface-flow wetlands[edit] Surface-flow wetlands[edit] Tidal-flow wetlands[edit] General contaminants removal[edit] Specific contaminants removal[edit] Nitrogen removal[edit] Organic nitrogen[edit] Journal of Environmental Sciences : Evaluation of the effectiveness of horizontal subsurface flow constructed wetlands for different media. Abstract Two media bed (gravel and Filtralite NR) were tested in a mesocosm to evaluate the removal of organic matter (as chemical oxygen demand (COD)), ammonia (NH4-N), nitrite, nitrate and solid matter (as total suspended solids (TSS)) for a synthetic wastewater (acetate-based) and a domestic wastewater. The use of Filtralite allowed average removal rates (6–16.8 g COD/(m2·day), 0.8–1.1 gNH4-N/(m2·day) and 3.1 g TSS/(m2·day)) and removal effciencies (65%–93%, 57%–85% and 78% for COD, NH4-N and TSS, respectively), higher than that observed in the experiments with gravel.
The applied loads of COD, ammonia, nitrate and TSS seem to influence the respective removal rates but only for the treatment of domestic wastewater with higher correlation coeffcients for Filtralite. Regardless the type of media bed and the type of wastewater, nitrate was completely removed for nitrogen loading rates up to 1.3 g NO3-N/(m2·day). Key words media bed; constructed wetlands; pollutants removal rates. MONITOR-ASSESS-ORGANIC-CHEMICAL-CW-C2009.pdf (Objet application/pdf)
The case study. Ecological RA. Chinese Chemical Letters : Phytoremediation of industrial effluent containing azo dye by model up-flow constructed wetland. JSIR 64(10) 717-721.pdf (Objet application/pdf) CR_17emes_SYNAPSES_09-05-2011 red.pdf (Objet application/pdf)