Q24 of 27 Page 96

The terms sewage, sewers and sewerage are interlinked with each other. Can you explain, how?

Wastewater released by home, industry, hospital etc. are called sewage. The small and big pipes that takes away sewage is called sewers. The network of this big and small pipes (sewers) is called sewerage. Just like transport system this sewerage carries sewage from the point of being produced to the point of disposal through these sewers.


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A mixture (x) in water contains suspended solids, organic impurities, inorganic impurities (a), nutrients (b), disease causing bacteria and other microbes. Give names for (x), (a) and (b)?

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What are the different types of inorganic and organic impurities generally present in sewage?

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Fill in the blanks in the following statements using words given in the box.

air, handpumps, cholera, water, large, ground


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Describe various steps of cleaning wastewater in a wastewater treatment plant.