New chemical process turns cotton gin residue into useful feedstocks
|Foster A. Agblevor|
The project offers a solution to one of cotton production's problems, he said. "Our estimate is that about 90 gallons of ethanol can be produced from a ton of cotton gin residue. At the end of a ginning season, plant sites in Virginia are piled high with the residue," Agblevor said, "There is enough raw material that needs to be used to make it possible to have a manufacturing process there."
Agblevor's research has shown that the processes work in a laboratory. Along with students and technicians at Virginia Tech's College of Agriculture and Life Sciences, Agblevor has taken the cotton gin residue and successfully chemically processed the material. The processes allow them to extract the glucose that can be used to make ethanol and the xylose that can be made into xylitol. The preliminary work was supported by the Southern Regional Biomass Energy Program.
"Our work shows a manufacturing process for extracting both products simultaneously from the cotton residue so in the future it is possible that a manufacturing company operating in Southside Virginia could produce both the ethanol and the xylitol products," Agblevor said.
An Iowa firm that produces ethanol from corn is interested in developing the technology. If the technology to use cotton gin residue can work efficiently at a pilot level, it will be possible to use the residue at a commercial level, which will not require government subsidies to make it economically viable. Currently, the production of ethanol from corn receives subsidies to make it profitable.