We specialize in design of constructed wetlands for polishing effluent from conventional sewage treatment plants (STPs), using the latest modelling techniques and our own performance database. We have experience in the design, construction supervision, planting and maintenance of some of the biggest constructed wetland systems in the world (e.g. the 481 ha treatment wetland in Oman).
Surface Flow Wetlands (SFWs) are a suitable, robust, energy efficient option for increasing the removal of nutrients (nitrogen and phosphorus) from existing STPs as part of an upgrade to meet higher environmental standards or to increase capacity. Wetlands also provide hydraulic buffering and can enhance the ability of the STP to deal with wet weather flows.
Using a wetland to polish STP effluent also creates wildlife habitat, increases biodiversity, sequesters carbon and enhances the green credentials of the municipality.
In other cases, we have used constructed wetlands to help water utilities address environmental flow requirements, such as “low flow fresh releases”.
Treatment wetlands can be used after a broad range of wastewater treatment processes, including activated sludge, MBR, MBBR, MLE, trickling filters, lagoons and waste stabilization pond systems.
OUR MUNICIPAL SERVICES INCLUDE: