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Q. |
During the disposal of the sludge, it must be |
A. | liquefied |
B. | dried |
C. | burned |
D. | fluidized |
Answer» B. dried | |
Explanation: the sludge can be dried in planted or unplanted drying beds, settling or thickening ponds. if the sludge is dried or composted, it can be applied in agriculture as a valuable nutrient. |
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