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Question 15

Animal waste, oil and urea are some of the organic impurities present in sewage. Name two more organic impurities present in sewage.


Solution

Fruits and vegetable wastes, pesticides and herbicides are organic impurities present in sewage other than animal wastes, oil and urea.  Sewage is a complex mixture containing suspended solids, organic and inorganic impurities, nutrients, saprotrophic and disease causing bacteria and other microbes. The inorganic impurities include nitrates, phosphates and metals.

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