Constructed wetlands

The largest and northern most full-scale system for wastewater irrigation of Salix plantations in Sweden.
The local community in Hedemora has long experience in producing biofuel from Salix plantations. The cooperation between Hedemora Energi AB and local farmers has resulted in irrigation of 75 acres of Salix Plantations. The local farmers in the project are guaranteed to sell their biofuel to the local municipal heating plant. As a result the project is contributing to the local production and consumption.

The Climate Technology Centre welcomed Amis de l'Afrique Francophone from Benin (AMAF-Benin) as its 400th Network member. This global network is comprised of technology experts from civil society, finance, the private sector and research institutions around the world.

Challenge: Oil spill contamination cannot be cleaned rapidly and completely from varied environments. Technology: Ferrofluids are colloidal dispersions of magnetic nanoparticles that can be manipulated with an external magnetic field. This invention proposes to apply ferrofluidic principles to the mitigation of oil contamination of solids (wetlands) water surfaces and water sub-surfaces. The particle size surfaces and dispersants can all be optimized for stabilizing oil removal collectability and water purification.

For mitigation, Uganda is to focus on implementation of a series of policies and measures in the energy supply, forestry and wetland sectors. In the business-as-usual (BAU) scenario the estimated emissions in 2030 will be 77.3 Million tons of carbon dioxide equivalent per year (MtCO2eq/yr). The estimated potential cumulative impact of the policies and measures could result in approximately 22% reduction of national green house gas emissions in 2030 compared to business-as-usual.

Limiting anthropogenic greenhouse gases in Russia to 70-75% of 1990 levels by the year 2030 might be a long-term indicator, subject to the maximum possible account of absorbing capacity of forests.

The project’s main objective is to integrate the NBSs into constructed wetlands to purify contaminated water soil and air at times simultaneously. This is made possible by having each system created of diverse natural biotic and abiotic components using a variety of plants and sediments selected for their physical and chemical properties and using varying water flows. The systems are never a standard solution but tailored for each case therefore adaptable/replicable all over the world.

The primary objective of wetland restoration can be three-fold.  These projects can serve to reduce coastal flooding and erosion and can also provide new habitats and environmental benefits. The term ‘wetland’ refers to a diverse range of shallow water and intertidal habitats, which occur in various locations around the world.  Wetland restoration relates to the rehabilitation of previously existing wetland functions from a more impaired to a less impaired or unimpaired state of overall function.

Natural purification systems have already been used for years in The Netherlands to improve the quality of waste water before discharge or reuse. The first basic ideas design for the ‘Waterharmonica’ as the link between the Water Chain and the Water System were rewarded by the Foundation for Applied Water Research (STOWA) on its 25th anniversary in 1996. Since then Waterharmonicas have been constructed in various places in The Netherlands firstly on a small scale but now also on a large scale.

Constructed wetlands is an environmentally friendly treatment system based on wastewater flow through granulated media on which macrophyte plants grow and contribute to the treatment.

Antea®Group Belgium is an international engineering and environmental consulting firm. Antea Group specializes in full-service solutions in the fields of environment, infrastructure, urban planning and water. Antea Group Belgium has developed a wide scope of expertise which allows for a multidisciplinary and interactive project implementation. Services include (policy) advice, research and technical assistance as required for project implementation and project management ranging from small local projects to the coordination of international consortia.