Zero-discharge of nutrients and water in a willow dominated constructed wetland.

摘要: A novel constructed wetland system has been developed to treat sewage, evaporate water and recycle nutrients from single households at sites where effluent standards are stringent soil infiltration is not possible. Main attributes of the willow wastewater cleaning facilities that systems have zero discharge, willows evapotranspire water, can be recycled via biomass produced in system. The generally consist c. 1.5 m deep high-density polyethylene-lined basins filled with planted clones ( Salix viminalis L.). surface area depends on amount quality sewage treated local annual rainfall. For a household needed typically between 200-300 m2. Settled dispersed underground into bed under pressure. When correctly dimensioned, will - an basis all rain falling onto system, take up heavy metals sewage. stems harvested regular remove stimulate growth willows. Initial experiences full-scale Denmark show promising results.