Which of the following is not correct regarding the primary treatment of waste-water?
A. Initially floating debris is removed by distillation
B. Grit and pebbles are removed by sedimentation
C. Solids that settle form the primary sludge
D. Supernatant forms the effluent
Answer:A
Which of the following is not correct regarding the primary treatment of waste-water?
A. Initially floating debris is removed by distillation B. Grit and pebbles are removed by sedimentation C. Solids that settle form the primary sludge D. Supernatant forms the effluent