8. What is the key difference between primary and secondary sewage treatment?

Answers (1)
S Sonika

The differences between the primary and secondary treatment of sewage are as follows:

Primary sewage treatment                 Secondary sewage treatment
Primary sewage treatment is a mechanical process that removes solid waste materials Secondary sewage treatment is a biological process in which waste materials are enzymatically treated by bacteria and other microbes
It is a less expensive and simple process It is an expensive and complicated process

 

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