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For satisfactory working of a sludge digestion unit, the pH range of digested sludge should be maintained as | |
A. | 4.5 to 6.0 [Wrong Answer] |
B. | 6.5 to 8.0 [Correct Answer] |
C. | 8.5 to 10.0 [Wrong Answer] |
D. | 10.5 to 12.0 [Wrong Answer] |