Question

Which of the following is true about composition and waste water?

(1) Suspended solids e.g. Sand, silt and clay – 0.1%

(2) Colloidal material, e.g., Faecal matter, bacteria, cloth and paper fibres – 0.1%

(3) Dissolved materials e.g.., Nutrients, (Nitrate, Ammonia, Phosphate, Calcium) – 0.1%

(4) All of the above together constitutes 0.1% of the waste water

• A. A, B, C, D
• B. A, B, C
• C. B, C
• D. D

Answer 1

Answer: (D)

D