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The most common substrate used in distilleries for the production of ethanol is
A
Molasses
B
Corn meal
C
Soya meal
D
Ground gram
Detailed Solution
Ethanol is produced by the fermentation of sugars by the yeast $Saccharomyces\ cerevisiae$.
Molasses is the thick, dark syrup left as a by-product of the sugar industry after the crystallisation of sugar from sugarcane juice.
It is rich in fermentable sugars (sucrose, glucose and fructose), is cheap and is available in large amounts, so it needs no prior conversion of starch into sugar.
Corn meal, soya meal and ground gram are rich in starch or protein and are costlier substrates.
Hence the most common substrate used in distilleries is molasses.
Molasses is the thick, dark syrup left as a by-product of the sugar industry after the crystallisation of sugar from sugarcane juice.
It is rich in fermentable sugars (sucrose, glucose and fructose), is cheap and is available in large amounts, so it needs no prior conversion of starch into sugar.
Corn meal, soya meal and ground gram are rich in starch or protein and are costlier substrates.
Hence the most common substrate used in distilleries is molasses.