Question

breifly explain biological treatment of sewage ?

Answer 1

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Answer 2

${\red{\textbf{Biological\:Treatment\:of\:Sewage}}}$

Biological treatment is a process that seems simple on the surface since it uses natural processes to help with the decomposition of organic substances, but in fact, it’s a complex, not completely understood process at the intersection of biology and biochemistry.
It is used worldwide because it’s effective and more economical than many mechanical or chemical processes.