MCQOPTIONS
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MCQOPTIONS
| 1. |
In the case of anaerobic digestion, what is the percentage of dry solids for the primary sludge considered at the outlet? |
| A. | 2-5% |
| B. | 1-2% |
| C. | 10-12% |
| D. | 7-9% |
| Answer» B. 1-2% | |