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प्रश्न
Name the following :
The solid precipitated material produced during secondary treatment of the effluent carried out in the effluent treatment plants.
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उत्तर
Sludge
संबंधित प्रश्न
Describe the usefulness of incineration of wastes, and also mention the precautions required in it.
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The question has four options. Choose the correct answer:
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