This paper presents the results of studies of isolation lignin and
hemicelluloses efficiency during the pre-treatment of wheat straw for
hydrolysis in a rotary-pulsation apparatus. The pre-treatment of
lignocellulosic raw materials for hydrolysis is a necessary step in the
second-generation bioethanol production technology. The lignocellulose
complex is destroyed during this process, and this allows hydrolytic enzymes
access to the surface of cellulose fibers. The pre-treatment is the most
energy-consuming stage in bioethanol production technology, since it usually
occurs at high temperature and pressure for a significant time. One of the
ways to improve the efficiency of this process is the use of
energy-efficient equipment that allows intensifying heat and mass transfer.
An example of such equipment is a rotary-pulsation apparatus, which are
effective devices in stirring, homogenization, dispersion technologies, etc.
The treatment of wheat straw in a rotary-pulsation apparatus was carried out
under atmospheric pressure without external heat supply at solid/water
ratios of 1:10 and 1:5 in the presence of alkali. It was determined that the
treatment of the water dispersion of straw at ratio of 1:10 due to the
energy dissipation during 70 minutes leads to the release of 42 % of lignin
and 25.76 % of easily hydrolyzed polysaccharides. Changing the solid / water
ratio from 1:10 to 1:5 leads to an increase in the yield of lignin and
easily hydrolyzed polysaccharides to 58 and 33.38 %, respectively.
Enhanced bioethanol production from wheat straw hemicellulose by mutant strains of pentose fermenting organisms Pichia stipitis and Candida shehatae
