 
			 
			MCQOPTIONS
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				| 1. | The maximum temperature at which thermophilic microorganisms remain active in sludge digester is ___________ | 
| A. | 60oC | 
| B. | 40oC | 
| C. | 30oC | 
| D. | 20oC | 
| Answer» B. 40oC | |