Which of the following statement about sewage treatment is false?A. In primary treatment, large sized particles are filtered through screen and residual water is subjected to sedimentationB. Coagulation can be carried out by passing ozone through waste waterC. In tertiary treatment, the waste water is treated with lime to remove phosphate following by coagulationD. Secondary treatment involves aerobic digestion of the organic waste.

Which of the following statement about sewage treatment is false?A. In

1.	Which of the following statement about sewage treatment is false?A. In primary treatment, large sized particles are filtered through screen and residual water is subjected to sedimentationB. Coagulation can be carried out by passing ozone through waste waterC. In tertiary treatment, the waste water is treated with lime to remove phosphate following by coagulationD. Secondary treatment involves aerobic digestion of the organic waste.
Answer» Correct Answer - B Coagulation can be carried out by adding alum and ferric choride in waste water.

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