What is the key difference between primary an | vedclass

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(B)       Primary Sewage Treatment    Secondary Sewage Treatment        $1$. It is a physical/mechanical process involving the removal of large and sm

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Primary treatment involves physical removal of particles,while secondary involves microbial action.

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(B)       Primary Sewage Treatment    Secondary Sewage Treatment        $1$. It is a physical/mechanical process involving the removal of large and small particles through filtration and sedimentation.    $1$. It is a biological process involving the action of aerobic and anaerobic microbes to decompose organic matter.        $2$. It is relatively inexpensive and less complex.    $2$. It is a more expensive and complex process requiring aeration and microbial management.

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

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