Nature-based solutions for decentralized wastewater treatment in the Lower Danube
Funded by the JRC, IRIDRA, the Water Science Institute and GWP Central and Eastern Europe implemented a project that broadened knowledge about alternatives for wastewater treatment in small settlements in the Lower Danube Region countries.
A feasibility study was conducted with two main goals: to screen the technical alternatives and to select the preferred alternative. It also covered the technical and financial appraisal of the selected alternative, the financial and economic analysis and identification of capacity building needs and plan for the training of plant operators.
The feasibility study results suggest constructed wetlands, a nature-based solution, as one of the best alternative. This technology, present on the market scale for 50 years, is already in use in Slovenia. Sequencing batch reactors (SBR) is another good alternative, which could be used for decentralized treatment wherever there is a lack of available land for constructed wetlands.
However, the study concludes that the decentralized approach offers real economic, social and environmental advantages only if very robust and low-maintenance technologies are used. Thus, such aspects must be considered by the water policy at the basin scale.
More details on this study can be found at:
The study can be found at: http://www.gwp.org/globalassets/global/gwp-cee_files/projects/jrs/feasib...