Which method is used to eliminate suspended solids from wastewater produced in the blast furnace gas cooling and cleaning process?

Explanation

Suspended solids in wastewater from blast furnace gas cooling and cleaning are effectively removed using a radial settling tank (thickener) that employs coagulants like lime and ferrous sulfate to enhance sedimentation. Other methods like aerated ponds, retention basins, or filtration are less suitable for this specific application.