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Microbes in Waste Management

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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. Which portion of sewage from primary treatment is taken for secondary treatment?

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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