the influence of the various parameters and process conditions of
function on the characteristics of the immobilized cell systems [18].
These phenomena are often interpreted as being a consequence of
mass transfer phenomena inside the structure [19].
The aim of the present work was to obtain maximum bioethanol
with immobilized Saccharomyces cerevisiae using CO2-laser pretreated
corn stover (LPCS) hydrolysates [9,20]. To obtain the
maximum cell concentration during the yeast immobilization
process, doping LPCS technology was used in immobilizing the
yeast gel beads. The process of immobilizing the yeast gel beads
was conducted using the embedding method with sodium alginate
and manganese alginate. The reducing sugars in LPCS hydrolysates
were subsequently fermented using immobilized S. cerevisiae. This
study focused on the doping LPCS concentration, yeast concentration,
and pH. The optimal fermentation conditions and the bioethanol
conversion rates were identified at various fermentation
conditions.