1. Waste Management Deepanshu Tuli VII (c) deepanshu tuli (r) Gurukul Global School

2. Introduction Have you ever seen overflowing bins and open dumps in your neighbourhood ? I know your answer would be yes as waste management has not been taken care of © deepanshu tuli ® Gurukul Global School

3. Types of waste Solid Waste- Food waste, bottle & paper Liquid Waste- Sewage and industrial effluent Gaseous Waste- Vehicle emission and gasses from chimneys In this Presentation we will talk more about liquid waste. © deepanshu tuli ® Gurukul Global School

4. Sources of waste water Domestic Activities: The waste water generated from our houses e.g. water used for bathing Agricultural: Wastewater generated from farms containing harmful pesticides and chemicals Industries: The waste water generated from various industries (paint and dye) containing harmful chemicals like chromium and lead. © deepanshu tuli ® Gurukul Global School

5. Eutrophication It is an excessive growth or “blooms” of algae in lakes rich in nutrition such as phosphates, is called eutrophication . Normally it takes thousands of years to progress but human activities have enhanced this process greatly © deepanshu tuli ® Gurukul Global School

6. Municipal Water Have you ever wondered where does all the waste water goes from our toilets and sinks ??? Each time we flush up our toilets or wash something, water containing faeces paper , cloth , soap , food scraps etc. goes down the drain . This water gets accumilated and forms sewage . In large cities it is known as Municipal Water © deepanshu tuli ® Gurukul Global School

7. Fact File Do you know why manhole covers are round??? This is to avoid accidents. Since man holes covers are round they do not fall down when somebody stands on them. If they were square or rectangular , they could have fallen down. What is BOD ??? BOD stands for Biochemical Oxygen Demand. BOD is the amount of oxygen required by a microrganisms to decompose. © deepanshu tuli ® Gurukul Global School

8. The schematic diagram of waste water treatment © deepanshu tuli ® Gurukul Global School Primary treatment Secondary treatment Tertiary treatment Sewage Treated water Mechanical Process Chemical Process Biological process

9. Recycling is one of the most efficient methods that can be adopted to manage our wastes © deepanshu tuli ® Gurukul Global School

10. © deepanshu tuli ® Gurukul Global School Thank You