Sewage contains which of the following wastes/ impurities?

Dissolved wastes

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Non-biodegradable wastes

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Suspended impurities

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None of these

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Solution

The correct options are
A
Dissolved wastes

B
Non-biodegradable wastes

C
Suspended impurities

Sewage contains dissolved (such as fertilisers) and suspended impurities (such as human excreta). It also contains non-biodegradable (such as plastics, glass) and biodegradable impurities (such as food waste).

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Waste water contains which of the following kinds of impurities?

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