| 摘要 |
The invention relates to a method for biological cleaning of water, wherein the water is guided through a filter which comprises mineral wool as filter material, wherein the water has preferably been in contact with plants and/or organisms, to a filter for biological cleaning of water comprising a filter material of mineral wool, to a filter unit comprising a filter tank provided with a layer of filter material and having a dirty water inlet and a clean water outlet separated therefrom by the layer of filter material, and an inlet for fresh water which is separated from the dirty water inlet by a flexible membrane, and to a method for the substrate culture of plants, wherein water optionally containing nutrients is recirculated and the recirculated water is purified with such a filter unit. |
