Environmental Engineering in CE
Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by

Lagoons
Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
Biological oxygen pond
Filtration

ANSWER DOWNLOAD EXAMIANS APP

Environmental Engineering in CE
Aerobic biological oxidation ponds used for the purification of polluted water

Destroys/removes pathogen from the sewage
Destroys/removes pathogen much more effectively if the sewage is chlorinated
All of these
Is not very effective for nonbiodegradable substances (e.g. ABS) containing effluents

ANSWER DOWNLOAD EXAMIANS APP