Methods of Safe Disposal of Waste – Notes
Water, Our Lifeline
Increase in population, industrialisation and improper disposal of wastes results in water pollution. This, in turn results in the scarcity of clean water.
The United Nations has declared the period 2005- 2015 as the International Decade for Action “Water for Life”.
Contaminated water causes many water – related diseases.
Removal of pollutants from waste water is called Sewage Treatment.
Wastewater from homes, industries, hospitals and office is called sewage.
Sewage contains organic and inorganic impurities, disease causing bacteria, saprotrophic bacteria, nutrients and other microbes.
Organic impurities such as animal waste, human faeces, urine, oil, vegetable and fruit waste, pesticides and herbicides are present in sewage.