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Microbes in Waste Management

What is the k...

Question

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

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Solution

Primary sewage treatment is a physical process that removes large impurities while secondary sewage treatment is a biological process that removes organic matter of sewage through the action of microbes.

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Q. Assertion :Secondary treatment of sewage is also called biological treatment while primary treatment is called physical treatment. Reason: Primary sewage treatment depends only upon sedimentation properties of materials present in sewage and filtration.

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Q. Sort the following events in primary, secondary and tertiary treatments of sewage.

Q. The primary treatment of sewage is a ___i____ process while the secondary stage of treatment is ___ii____.

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Microbes in Waste Management

Standard XII Biology

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