MCQOPTIONS
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| 1. |
What is the percentage of dry solids for the primary sludge assumed at the outlet of aerobic digester? |
| A. | 1-2.5% |
| B. | 7-10.5% |
| C. | 2.5-7% |
| D. | 10.5-12.5% |
| Answer» D. 10.5-12.5% | |