Dephosphatation unit useful in a wastewater treatment device such as a planted filter for the removal of phosphorus from the wastewater, comprises an electric arc furnace slag in the form of aggregates

摘要

The dephosphatation unit comprises an electric arc furnace slag in the form of aggregates. The electric arc furnace slag has a particle size of 10-40 mm, and is obtained by spraying water over a molten slag during its cooling. An independent claim is included for a wastewater treatment device.