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				| 1. | What is the BOD removal level for moving bed bioreactor? | 
| A. | 3.5-4.5 Kg BOD/m<sup>3</sup>day | 
| B. | 2-2.75 Kg BOD/ m<sup>3</sup>day | 
| C. | 3 Kg BOD/ m<sup>3</sup>day | 
| D. | 5 Kg BOD/m<sup>3</sup>day | 
| Answer» B. 2-2.75 Kg BOD/ m<sup>3</sup>day | |