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Wastewater Story
Explain the relationship between sanitation and disease.
Sanitation and disease are related to each other as lack of sanitation can cause diseases.
In our country, a large number of people even today do not have sewerage facilities and thus defecate in open fields, railway tracks, etc. The untreated human excreta thus pollute soil and water sources including the underground water. When this contaminated water is used for drinking, it can cause diseases such as cholera, typhoid, hepatitis, dysentery, etc. which may even lead to death.
Therefore, lack of sanitation resulting in drinking of contaminated water can cause health problems.
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Why should oils and fats be not released in the drain? Explain.
Describe the steps involved in getting clarified water from wastewater.
What is sludge? Explain how it is treated.
Untreated human excreta is a health hazard. Explain.
Name two chemicals used to disinfect water.
Explain the function of bar screens in a wastewater treatment plant.
Explain the relationship between sanitation and disease.
Outline your role as an active citizen in relation to sanitation.
Here is a crossword puzzle: Good luck!
Across
3. Liquid waste products
4. Solid waste extracted in sewage treatment
6. A word related to hygiene
8. Waste matter discharged from human body
Down
1. Used water
2. A pipe carrying sewage
5. Micro-organism which causes cholera
7. A chemical to disinfect water
Study the following statements about ozone:
(a) It is essential for breathing of living organisms.
(b) It is used to disinfect water.
(c) It absorbs ultraviolet rays.
(d) Its proportion in air is about 3%.
Which of these statements are correct?
(i) (a), (b) and (c)
(ii) (b) and (c)
(iii) (a) and (d)
(iv) All four
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