Ethanolic Fermentation Efficiency of Seaweed Solid Waste Hydrolysates by Saccharomyces cerevisiae
Abstract: The objective of
this research was to determine the saccharification and the fermentation
efficiency of seaweed solid waste hydrolysate by Saccharomyces cerevisiae
(Accession number 3012.254) in anaerobic condition. The optimum
saccharification yield of acid pretreated waste (40.93±1.72)% was obtained
after 48 hours with saccharification
rate of (0.51±0.02) g/l.h. Higher yield was shown by NaOH pretreated waste
(67.29±1.24)% after 24 hours with saccharification rate of (0.81±0.06) g/l.h.
The fermentation of enzymatic hydrolysates of acid and alkali pretreated
samples by S. cerevisiae produced a maximum of 7.52±0.24 g/l and 14.5±0.54 g/l
ethanol respectively after 72 hours fermentation. Maximum ethanol yield was
0.31±0.03 g/g and 0.40±0.02 g/g sugar respectively for acid and alkali
pretreated samples. The ethanol yields showed that alkali pretreated sample
produces higher conversion substrate ratio (80% of theoretical yield) compared
to acid pretreated sample (62% of theoretical yield).
Keywords: bioethanol,
Saccharomyces cerevisiae, solid seaweed waste
Author: Pujoyuwono
Martosuyono, Ifah Munifah, Gesty Aulia Ningrum
Journal Code: jpperikanangg160032
