Question

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

Answer 1

• Sewage contains mostly organic and inorganic impurities dissolved in water.​

• The organic impurities are biodegradable and include human faeces, oil, animal waste, urea (urine), fruit and vegetable wastes, food particles, etc.​

• The inorganic impurities are non-biodegradable and include metals, phosphates, nitrates, etc.