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The amount of biodegradable organic matter in sewage water can be estimated by measuring
Option: 1
Biochemical oxygen demand
Option: 2
The growth of anaerobic bacteria in water
Option: 3
Biogeological oxygen demand
Option: 4
The growth of aerobic bacteria in water.
Answers (1)
As we learnt
Causes of water pollution -
Sedimentation
- wherein
When sewage is allowed to stand, the suspended particles settle to the bottom. So by sedimentation, the suspended particles are removed from sewage
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