wetland construction Articles

  • Q&A To Constructed Wetlands

    The booklet "Q&A To Constructed Wetlands" provides a better understanding on the use of constructed wetlands to treat wastewater as compared to conventional methods. This booklet was jointly produced by The National Hydraulic Research Institute of Malaysia (NAHRIM) and Wetlands International, Malaysia. Description: Constructed Wetlands are artificial wastewater treatment systems consisting ...


    By Wetlands International

  • Effects of HRT on the efficiency of denitrification and carbon source release in constructed wetland filled with bark

    Constructed wetland is widely used to treat municipal sewage. However, lack of carbon source always constraints the application of constructed wetland in advanced tailwater treatment process. Bark was used as the filler and external carbon source of constructed wetland in the study, and the effects of hydraulic retention time (HRT) on NO3−−N removal efficiency and carbon release velocity were ...


    By IWA Publishing

  • Water cleaning and wetland construction

    Slippery Rock University's Macoskey Center for Sustainable Systems has served as an ideal locale for the study of biological waste and wastewater concerns in Western Pennsylvania. The Center's constructed ponds, waterless composting toilet and indoor greywater treatment system produced, in 19982000, great amounts of data on ecological approaches to wastewater treatment, which need to be reviewed. ...


    By Inderscience Publishers

  • Water balance: case study of a constructed wetland as part of the bio-ecological drainage system (BIOECODS)

    The Bio-ecological Drainage System, or BIOECODS, is an urban drainage system located at the Engineering Campus, Universiti Sains Malaysia. It consists of a constructed wetland as a part of the urban drainage system to carry storm water in a closed system. In this closed system, the constructed wetland was designed particularly for further treatment of storm water. For the purpose of studying the ...


    By IWA Publishing

  • Effects of open water on the performance of a constructed wetland for nonpoint source pollution control

    The seasonal performance of four differently configured constructed wetland systems was compared for the treatment efficiency of nonpoint source pollution. Dead plants in the constructed wetlands increased the nitrogen removal rate during winter by providing organic carbon, which is essential for the denitrification process. However, when the wetlands released phosphorus from the dead plants, the ...


    By IWA Publishing

  • Influence of earthworm Eisenia fetida on Iris pseudacorus's photosynthetic characteristics, evapotranspiration losses and purifying capacity in constructed wetland systems

    Four constructed wetland systems were studied to investigate the effects of adding Eisenia fetida on the purifying capacity of constructed wetlands. Addition of E. fetida increased the photosynthetic rate (Pn), transpiration rate (Tr) and chlorophyll meter value of leaves of Iris pseudacorus L. in the constructed wetlands by 16, 35 and 7%, respectively. Compared with the substrate only ...


    By IWA Publishing

  • Waste Stabilization Ponds and Constructed Wetlands - Design Manual, 2005

    The design manual for waste stabilization ponds and constructed wetlands presented in this CD ROM gives a comprehensive technical information about their planning, design and operation. Also a number of numerical models are included to assist in finding the size of a constructed wetland or stabilization pond, reduce the concentration of heavy metals, phosphorous and nitrogen amongst other ...


    By IWA Publishing

  • Study of oyster shell as a potential substrate for constructed wetlands

    We tested the suitability of oyster shell (OS) as a substrate for phosphorus removal in constructed wetlands (CWs) treating swine wastewater. OS is proven to have a significant phosphorus adsorption capacity; significant phosphorus removal was achieved in vertical subsurface flow constructed wetlands (VSSFs) that were filled with OS and used to treat swine wastewater. In the VSSF system, OS ...


    By IWA Publishing

  • Predicting Sustainable Ground Water to Constructed Riparian Wetlands: Shaker Trace, Ohio, USA

    Water isotopy is introduced as a tool to design, locate, and select storm water best management practices for the prediction of sustained ground water inflows to prospective constructed wetlands. A primer and application of the stable isotopes, 18O and 2H, are discussed for riparian wetland restoration areas among an agricultural landscape in southwestern Ohio. Conventional piezometric ...


    By Springer-Verlag GmbH

  • Study of oyster shell as a potential substrate for constructed wetlands

    We tested the suitability of oyster shell (OS) as a substrate for phosphorus removal in constructed wetlands (CWs) treating swine wastewater. OS is proven to have a significant phosphorus adsorption capacity; significant phosphorus removal was achieved in vertical subsurface flow constructed wetlands (VSSFs) that were filled with OS and used to treat swine wastewater. In the VSSF system, OS ...


    By IWA Publishing

  • Influence of substrate depth and particle size on phosphorus removal in a surface flow constructed wetland

    Substrate adsorption is one of the main processes by which redundant phosphorus is removed from wastewater in surface flow constructed wetlands (SFCWs). The physical properties of the substrate, such as depth and particle size, will influence the amount of phosphorus adsorption. This study was carried out in a long-running intermittent inflow constructed wetland that covered a total area of ...


    By IWA Publishing

  • Controlling urban stormwater pollution by constructed wetlands: a Canadian perspective

    During the past 20 years, Constructed Stormwater Wetlands (CSWWs) have attained broad acceptance in Canada as effective measures for stormwater management. CSWWs are used mainly for improving stormwater quality by providing sufficient treatment volumes in shallow permanent pools. This leads to high requirements for land, which is one of the constraints on CSWWs use. Even though CSWWs perform less ...


    By Inderscience Publishers

  • Effect of polyaluminium chloride on phosphorus removal in constructed wetlands treated with swine wastewater

    Total phosphorus (TP) removal in aged constructed wetlands poses a challenge, especially when treated with swine wastewater with high concentrations of phosphorus (P). Our earlier studies with anaerobic lagoon swine wastewater treatment in constructed wetlands showed a decline in P removal (45–22%) with increased years of operation. These particular wetlands have been treated with swine ...


    By IWA Publishing

  • Reed Beds

    Naturally occurring wetlands have a natural, innate ability to remediate contaminants from water. Over the decades BritishFlora have supplied many millions of reeds, Phragmites communis, for both habitat creation projects such as bird reserves to attract bittern, bearded tit and water rails, to name but a few. Common Reed is commonly planted to help with the cleaning of contaminated water due to ...


    By BritishFlora

  • Vertical Flow Constructed Wetlands

    The constructed wetland technology is today continuously evolving with new and innovative applications. Vertical flow constructed wetlands is a relatively new and still developing technology in the field of ecological and environmental engineering. These ecological systems offers us the potential to treat water and sludge in a more sustainable way, even when financial sources are limited. The ...


    By IWA Publishing

  • Comparison of grey water treatment performance by a cascading sand filter and a constructed wetland

    A novel unplanted vertical flow subsurface constructed wetland technology comprising three shallow beds (0.6 m length, 0.45 m width and 0.2 m depth) arranged in a cascading series and a standard single-pass Vertical Flow Planted Constructed Wetland (VFPCW, 6 m2 and 0.7 m depth) were tested for grey water treatment. Particular focus was on meeting consent for published wastewater reuse parameters ...


    By IWA Publishing

  • Using a constructed wetland for non-point source pollution control and river water quality purification: a case study in Taiwan

    The Kaoping River Rail Bridge Constructed Wetland, which was commissioned in 2004, is one of the largest constructed wetlands in Taiwan. This multi-function wetland has been designed for the purposes of non-point source (NPS) pollutant removal, wastewater treatment, wildlife habitat, recreation, and education. The major influents of this wetland came from the local drainage trench containing ...


    By IWA Publishing

  • Phosphorus removal by apatite in horizontal flow constructed wetlands for small communities: pilot and full-scale evidence

    Phosphorus (P) removals in constructed wetlands (CWs) have received particular attention in recent decades by using specific materials which promote adsorption/precipitation mechanisms. Recent studies have shown interest in using apatite materials to promote P precipitation onto the particle surface. As previous trials were mainly done by lab experiments, this present study aims to evaluate the ...


    By IWA Publishing

  • Are constructed treatment wetlands sustainable sanitation solutions?

    The main objective of sanitation systems is to protect and promote human health by providing a clean environment and breaking the cycle of disease. In order to be sustainable, a sanitation system has to be not only economically viable, socially acceptable and technically and institutionally appropriate, but it should also protect the environment and the natural resources. ...


    By IWA Publishing

  • Winery and distillery wastewater treatment by constructed wetland with shorter retention time

    The rationale for using constructed wetlands for treating wastewater is that wetlands are naturally among the most biological active ecosystem on earth. The aim of the study was to determine the impact of shorter retention time on the performance of constructed wetland in terms of Chemical Oxygen Demand (COD) and other elements removal. The application of wastewater with retention time of seven ...


    By IWA Publishing

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