Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by__________________?
Correct answer: C. Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
- A. Biological oxygen pond
- B. Lagoons
- C. Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
- D. Filtration
Explanation
Blast-furnace gas-cleaning water contains heavy suspended solids that are removed by coagulation followed by radial settling and thickening. Lime and ferrous sulphate promote particle aggregation and settling.
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