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  • Subjects
  • Science CBSE
  • Class 7

Wastewater story

Theory

1. Water as our lifeline and wastewater
2. Sewage, sewers and sewerage
3. Wastewater treatment plant: Physical and biological processes involved
4. Wastewater treatment plant: Chemical process
5. The need for us to become an active citizen
6. Housekeeping practices that are to be adopted
7. Importance of sanitation and cause of diseases
8. Alternative methods of disposing sewage

Exercises

1. Waste water

Difficulty: easy

2
2. Organic and inorganic impurities

Difficulty: easy

2
3. Removal of solids from sewage

Difficulty: easy

2
4. Housekeeping practices

Difficulty: easy

2
5. Sewage disposal

Difficulty: easy

2
6. Removal of suspended soilds and suspended sludge

Difficulty: medium

4
7. Sewage and its components

Difficulty: medium

4
8. Parts of WWTP

Difficulty: medium

4
9. House keeping and sanitation

Difficulty: medium

3
10. Waste water and sewage

Difficulty: medium

4
11. Physical , biological and chemical processes in WWTP

Difficulty: hard

6
12. Sewage and sanitation

Difficulty: hard

6

Tests

1. Training test 1

Difficulty: medium

8
2. Training test 2

Difficulty: medium

8

Teacher manuals

1. Methodical recommendation

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