Sewage Water Treatment

Question 1

give the steps of waste water treatment

Answer 1

1. Screening - The sewage is passed through gratings and meshes to remove anything large
   2.Sedimentation - The sewage is left to sit in a settlement tank, so that the heavier particles settle at the bottom as sludge, while the lighter particles settle at the top as effluent.

Question 2

is the effluent or sludge the one that uses aerobic respiration to break down organic matter ?

Answer 2

liquid effluent undergoes aerobic respiration
sludge undergoes anaerobic respiration in a sealed tank where after it can be used as fertilizer because lots of neutrients or burned as fuel since it contains much methane after