Question

Question 15

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

Answer 1

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.