The limiting factor is its by-products: both bacteria break down cellulose into glucose and other sugars such as xylose.
The economics of the process will depend on the market for xylose.
British Dictionary definitions for xylose
a white crystalline dextrorotatory sugar found in the form of xylan in wood and straw. It is extracted by hydrolysis with acids and used in dyeing, tanning, and in foods for diabetics. Formula: C5H10O5