In this study, water hyacinth stem pieces were used as new cellulosic support for yeast
immobilization and the immobilized biocatalyst was then inoculated in the medium with
different glucose concentrations for ethanol fermentation. Water hyacinth (Eichhornia
crassipers) is a fast-growing aquatic plant widely distributed throughout the world. This plant
has been used in the production of paper, crafts, rope, and furniture. Water hyacinth stem has
been known as a good adsorbent material with a large specific surface [11]. According to Yu
et al. [12], cellulosic material with high porous structure could be used as support for yeast
immobilization. There has been no study on yeast immobilization on water hyacinth stem pieces