Biological purification of eutrophic waters using macrophytes for reduction of phytoplankton

摘要

Eutrophic waters are purified by layerwise reduction of phytoplankton with macrophytes from the surface of the water downwards. Purification of eutrophic water comprises layerwise reduction of phytoplankton using macrophytes. The macrophytes are located on carriers which are lowered stepwise through the water starting at the surface level of the water and progressing downwards to lower levels, especially down to the water bed, so that the phytoplankton is eliminated layerwise as the carrier descends.