“Technology review of constructed wetlands - Subsurface flow constructed wetlands for greywater and domestic wastewater treatment”.

This new publication is an important contribution of the GTZ program “Sustainable sanitation – ecosan” as it provides valuable guidance on constructed wetlands in developing countries and countries in transition for wastewater and greywater treatment. This program is commissioned by the German Federal Ministry for Economic Sooperation adn Development (BMZ).

This booklet (36 pages) focuses on treating domestic/municipal wastewater or greywater with subsurface flow constructed wetlands with coarse sand as a filter medium. The emphasis is on the application in developing countries and countries in transition. In the publication, an overview and basic guidance is provided on the design and maintenance of horizontal flow beds (HFBs), vertical flow beds (VFBs) and the “French System”. A description of the most common pre-treatment systems is also included due to their vital importance for the proper functioning of CWs.

The target audience are people with some basic technical background who want to obtain an overview of subsurface flow constructed wetlands, their designs, performance and maintenance requirements.