Constructed wetlands

Constructed wetlands are a series of connected reed fields that, by means of microbial interactions, purify effluents after biological treatment into dischargeable water. This system has a low energy consumption, is also easy to construct and helps in the development of biodiversity. However, a large surface area is required to install this reed field purification.

In Flanders there are 7 constructed wetlands are working as polishing step after a biological treatment (nitrification-denitrification) for processing the liquid fraction of manure (2 of them for the liquid fraction of digestate of anaerobic digestion).