DSM and DONG Energy Denmark have demonstrated the combined fermentation of C6 and C5 sugars from wheat straw on a 270,000 liter industrial scale with a similar yield as obtained on a 1 liter laboratory scale using DSM’s advanced yeast. The combined fermentation results in a 40% increase in ethanol yield per ton of straw, which can result in significant cost cuts in the production of bio-ethanol from cellulosic feedstock.

The demonstration took place in DONG Energys Inbicon demonstration plant in Kalundborg Denmark, reportedly the longest running demonstration facility for cellulosic bio-ethanol production in the world. The facility was reconstructed in 2013 in order to be able to conduct mixed fermentation of C6 and C5 sugars.

DSM said it has successfully established a supply chain framework for C5/C6 dry yeast and shown its ability to produce and transport this advanced yeast for use on an industrial scale.