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Question
Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by__________________?
Options:
A .  Biological oxygen pond
B .  Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
C .  Lagoons
D .  Filtration
Answer: Option B
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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