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प्रश्न
State whether the following is true or false.
Primary treatment of sewage is a physical process while secondary treatment is done by adding bacteria.
चूक किंवा बरोबर
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उत्तर
This statement is true.
Explanation:
- Primary treatment physically removes suspended particles by filtration and sedimentation.
- Secondary treatment is biological; microbes, including aerobic bacteria, break down organic waste.
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