DONG Energy and Royal Dutch DSM have demonstrated a combined
fermentation of C6 and C5 sugars from wheat straw on industrial scale. 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 second
DONG Energy and the Dutch Life Sciences and Materials Sciences company, Royal
DSM, have under the EU 7th Framework Programme concluded a test of fermentation.
In the two month fermentation test mixed C6 and C5 fermentation using DSM’s
advanced yeast was found to yield 40% more ethanol per ton of straw than
traditional C6 fermentation.
The demonstration took place in DONG Energy's Inbicon demonstration plant in
Kalundborg (Denmark), 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. The Inbicon
demonstration plant has implemented a newly developed process for production of
high sugar concentration mash.
In this demonstration, DSM has successfully established the supply chain for
advanced dry yeast and shown to be able to produce and transport its yeast for
use on industrial scale.
Jan Larsen, Head of R&D in New Bio Solutions, DONG Energy, said: "In this
test the mixed fermentation of C6 and C5 sugars has been proven with similar
yield on 270.000 litre industrial scale as was obtained at 1 litre laboratory
scale. This is an impressive scale-up and it improves possibilities of
deployment of the Inbicon technology."
Christian Koolloos, Business Manager Bio-ethanol at DSM, said: “With the
supply of yeast product to Inbicon, DSM has demonstrated that it has established
the required supply chain framework. DONG Energy and DSM have collaborated to
make cellulosic bio-ethanol production through fermentation of C5 sugars a
reality. The successful supply and application of DSM’s cellulosic yeast product
is a milestone in the commercial roll-out of DSM’s cellulosic fermentation
The joint work by DONG Energy and DSM, in which excellent collaboration has
produced an important result, is co-funded by the KACELLE project. In November
2009, DONG Energy and DSM together with four other partners (Statoil, University
of Minho, University of Copenhagen, DBFZ) signed the Kalundborg Cellulosic
Ethanol Project (KACELLE), devoted to demonstrating and further optimizing the
Kalundborg cellulosic bio-ethanol plant, under the EU 7th Framework Programme.