Sewage waste is....

In the first stage of sewage treatment,which materials are removed through filtration and sedimentation?

Sewage water can be purified for recycling with the action of

$A$ sewage treatment process,in which a portion of the decomposer bacteria present in the waste is recycled into the beginning of the process,is called

What is removed by sedimentation in the sewage treatment process?

Treatment of waste-water is done by the