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NEET-XII-Biology

10: Microbes in Human Welfare

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  • #8
    What is the key difference between primary and secondary sewage treatment?
    Ans :



    Primary sewage treatment
    		 Secondary sewage treatment
    1.
    		 It is a mechanical process involving the removal of coarse solid materials.
    		 1.
    		 It is a biological process involving the action of microbes.
    2.
    		 It is inexpensive and relatively less complicated.
    		 2.
    		 It is a very expensive and complicated process.