question_answer

Following is the sewage treatment. In which of the following options, correct word for all the four numbers (1, 2, 3 and 4) are indicated.                                              

A) 1 - Large aeration tanks; 2 - Chemical agitation; 3 - High; 4 - Anaerobic

B) 1 - Large aeration tanks; 2 - Mechanical agitation; 3 - Low; 4 - Anaerobic

C) 1 - Large aeration tanks; 2 - Chemical agitation; 3 - Low; 4 - Aerobic

D) 1 - Large aeration tanks; 2 - Mechanical agitation; 3 - High; 4 - Anaerobic