Iranian Journal of Fisheries Sciences
مجله علوم شیلاتی ایران
IJFS
Agriculture
http://jifro.ir
1
admin
1562-2916
10.18869/acadpub.ijfs
en
jalali
1398
12
1
gregorian
2020
3
1
19
2
online
1
fulltext
en
Bioethanol a by-product of agar and carrageenan production industry from the tropical red seaweeds, Gracilaria manilaensis and Kappaphycus alvarezii
Biotechnology
Biotechnology
پژوهشي
Orginal research papers
The two red seaweeds, <em>Gracilaria manilaensis</em> and <em>Kappaphycus alvarezii </em>are cultivated in Malaysia for producing agar and carrageenan, respectively. The residues of these seaweeds after removing agar and carrageenan by dilute acid treatment were subjected to enzymatic hydrolysis using cellulase (Cellic CTec 2). In the optimization of enzymatic hydrolysis, highest glucose concentration was achieved in the sample with liquid: residue ratio of 7.5:1 and enzyme loading of 10 % w w<sup>-1</sup> residue. The resulting glucose was converted to bioethanol using <em>Saccharomyces cerevisiae</em> where bioethanol yields from <em>G. manilaensis </em>and <em>K. alvarezii</em> were 56.26±1.10 g L<sup>-1</sup> and 51.10±1.21 g L<sup>-1</sup>, respectively, which corresponded to 91 % and 95 % of the theoretical yield. The results of this study indicate that the residues of these seaweeds can be efficiently converted to bioethanol and besides environmental benefits, additional profit can be achieved in the phycocolloid industry.
Bioethanol, Cellulase, Agar residues, Gracilaria manilaensis, Kappaphycus alvarezii
942
960
http://jifro.ir/browse.php?a_code=A-10-2284-1&slc_lang=en&sid=1
M.J.
Hessami
mjhessami@gmail.com
100319475328460033966
100319475328460033966
No
Institute of Biological Sciences, Faculty of Sciences, University of Malaya, KL 50603, Malaysia
A.
Salleh
aishahsalleh@um.edu.my
100319475328460033967
100319475328460033967
No
Institute of Biological Sciences, Faculty of Sciences, University of Malaya, KL 50603, Malaysia
S.M.
Phang
phang@um.edu.my
100319475328460033968
100319475328460033968
Yes
Institute of Biological Sciences, Faculty of Sciences, University of Malaya, KL 50603, Malaysia