Sweet sorghum is a relative to other common sorghums grown such as grain sorghum and forage sorghum. But instead of harvested for grain or its forage, sweet sorghum is harvested for its sugar content in the stems. The sugar can be directly fermented into ethanol like sugar cane ethanol. This direct squeeze to fermentation provides a benefit in cost as no cook process or costly enzymes are needed like in corn ethanol production.
References: The Sweet Sorghum Ethanol Association (SSEA) welcomes visitors to our website.
For more information click here to read this pdf from Texas A&M. According to this article ethanol could be produced from irrigated sweet sorghum at $0.61/gal (28.75 wet tons/acre) and from dry land production at $0.64/gal (11.4 wet tons/acre).
• Present theoretical yield of ethanol from sweet
sorghum: 28,000 lts/ha/year in 4 cuttings
• Present theoretical yield of ethanol from sugar cane:
8400 lts/ha/year in top yielding crop of 120 ton/Ha