Bioethanol a by-product of agar and carrageenan production industry from the tropical red seaweeds, Gracilaria manilaensis and Kappaphycus alvarezii
Document Type
Article
Publication Date
1-1-2020
Abstract
The two red seaweeds, Gracilaria manilaensis and Kappaphycus alvarezii 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(-1) residue. The resulting glucose was converted to bioethanol using Saccharomyces cerevisiae where bioethanol yields from G. manilaensis and K. alvarezii were 56.26 +/- 1.10 g L-1 and 51.10 +/- 1.21 g L-1 , 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.
Keywords
Bioethanol, Cellulase, Agar residues, Gracilaria manilaensis, Kappaphycus alvarezii
Divisions
InstituteofBiologicalSciences,ocean
Funders
Universiti Malaya (PV026-2012A),Universiti Malaya (RP001O13SUS),Ministry of Energy, Science, Technology, Environment and Climate Change (MESTECC), Malaysia (04-01-03-SF0668),Department of Fisheries Malaysia (53-02-03-1061)
Publication Title
Iranian Journal of Fisheries Sciences
Volume
19
Issue
2
Publisher
Iranian Fisheries Science Research Institute
Publisher Location
IRANIAN FISH SCI RES INST,TEHRAN-KARAJ HWY, EXIT PAYKAN SHAHR, SARVENAZ AVE, SARVE AZAD AVE, W 8 ST, TEHRAN, 00000, IRAN