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Activated sludge is about what share water?

A50 per cent
B75 per cent
C25 per cent
D97 per cent
Answer & Solution
Correct answer: D. 97 per cent
1. Sand drying beds remove the water. 2. Activated sludge is about 97 per cent water. 3. Dried sludge becomes manure. _Source: syllabus Science, Chapter 18, Wastewater Story._
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