Q.

What do you understand by the term Dark Fermentation'?

A. It is a method to dispose nu-clear wastes.
B. It is a method to produce methane from organic wastes.
C. It is a method to reduce COD in the atmosphere.
D. It is a method to produce Hydrogen as a fuel from waste water.
Answer» D. It is a method to produce Hydrogen as a fuel from waste water.
Explanation: Dark fermentation is the fermentative conversion of organic substrate to bio-hydrogen. It is a complex process manifested by diverse groups of bacteria,involving a series of biochemical reactions using three steps similar to anaerobic conversion. Wastewater is used as a potential substrate for bio-hydrogen production in the dark fermentation process.
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