Environmental Engineering in CE
Which of the following is not a practical method of low level radioactive waste disposal?

Filling in steel crates and shooting it off out of earth
Dilution with inert material
Discharging to atmosphere through tall stacks after dilution
Disposing off in rivers & oceans

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Environmental Engineering in CE
Lagoons used for purification of polluted water

All of these
Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds
Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre
Use micro-organisms/bacteria in presence of dissolved oxygen

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