Pilanee Vaithanomsat and Sinsupha Chuichulcherm and Waraporn Apiwatanapiwat
Bioethanol Production from Enzymatically Saccharified Sunflower Stalks Using Steam Explosion as Pretreatment
88 - 91
2009
3
1
International Journal of Agricultural and Biosystems Engineering
https://publications.waset.org/pdf/1318
https://publications.waset.org/vol/25
World Academy of Science, Engineering and Technology
Sunflower stalks were analysed for chemical
compositions pentosan 15.84, holocellulose 70.69,
alphacellulose 45.74, glucose 27.10 and xylose 7.69 based on
dry weight of 100g raw material. The most optimum condition for
steam explosion pretreatment was as follows. Sunflower stalks were
cut into small pieces and soaked in 0.02 M H2SO4 for overnight.
After that, they were steam exploded at 207 C and 21 kgcm2 for 3
minutes to fractionate cellulose, hemicellulose and lignin. The
resulting hydrolysate, containing hemicellulose, and cellulose pulp
contained xylose sugar at 2.53 and 7.00, respectively.The pulp
was further subjected to enzymatic saccharification at 50 C, pH 4.8 citrate buffer) with pulpbuffer 6 (ww)and Celluclast 1.5Lpulp
2.67 (ww) to obtain single glucose with maximum yield 11.97.
After fixedbed fermentation under optimum condition using
conventional yeast mixtures to produce bioethanol, it indicated
maximum ethanol yield of 0.028 g100 g sunflower stalk.
Open Science Index 25, 2009