Question 14

Name two inorganic impurities present in sewage.

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Solution

Inorganic impurities present in sewage are nitrates and phosphates. Sewage is a complex mixture containing suspended solids, organic and inorganic impurities, nutrients, saprotrophic and disease causing bacteria and other microbes. The organic impurities include human faeces, animal waste, oil, urea (urine), pesticides, herbicides, fruit and vegetable waste. Metals are also considered as inorganic impurities.

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

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Which type of organic and Inorganic impurities are present in sewage?

Question 15

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

Which of the following is a part of inorganic impurities in the sewage?

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