IMMERSIBLE BIOLOGICAL FILTER FOR THE PURIFICATION OF WASTE WATER

摘要

According to the present invention, the im- mersible biological filter for the purification of waste water is characterized in that it is comprised as bacterial support an assembly of ribbons essen- tially continuous and made of plastic material ar- ranged in a spiral around two supporting members. The waste water is brought (at 101) and discharged into the container forming the biological filter. The hanks (103) of rubans are arranged vertically.