Lambertsmühle, Germany

In this pilot project, a source separation system of wastewater for a museum has been installed, see http://www.otterwasser.de/english/concepts/lande.htm.

In this case, greywater is separated from other wastewater streams and is treated with a vertical flow constructed wetland preceded by septic tanks. The required area is less than 2 m²/PE. This system uses gravel as a substrate due to the idea that particle size should not be too fine in order to prevent clogging. After some month of start up (for biofilm growing and adopting) this system is very effective in reducing organic, nitrogen, and phosphorus. Performance of the system can be seen in the following diagrams:

Figure 6: COD, N and P removal in the Constructed wetlands Lambertsmühle