2.5. Fermentation capacity test
In order to evaluate the ability of the flocculating yeast strain to
ferment glucose in the filtrate, a capacity test was performed on
the fermentation part of SSFF set up using the liquid fraction of
the spruce slurry as carbon source. Different dilution rates from
0.1–0.225 h1 were used, each of the dilution rate was observed
for 24 h, and then samples were taken and analyzed for glucose,
mannose, xylose, ethanol, glycerol and acetic acid. This is to see
how well the glucose can be consumed and converted to ethanol
at different dilution rates from the filtration unit, and how long
the cells can be used for fermentation.