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Wastewater Story

Question

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Fill in the blanks:
(a) Cleaning of water is a process of removing ___.
(b) Wastewater released by houses is called .
(c) Dried _ is used as manure.
(d) Drains get blocked by and __.

Solution

pollutants

,

sewage

,

sludge

,

cooking oil and fats

Some More Questions From Wastewater Story Chapter

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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