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प्रश्न
What are the three major kinds of impurities in domestic wastewater?
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उत्तर
- Spended solids, e.g., Sand, silt and clay.
- Colloidal materials, e.g., Fecal matter, bacteria, cloth and paper fibres.
- Dissolved materials, e.g., Nutrients (nitrate, ammonia, phosphate, sodium, calcium).
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