Open AccessProduction of Bioethanol from Seaweed, Gracilaria verrucosa and Eucheuma cottonii, by Simultaneous Saccharification and Fermentation Methods
Author(s) -
Amel Naji Wadi,
Ahyar Ahmad,
M. Tompo,
Hasman Hasyim,
Ambo Tuwo,
Mitsutoshi Nakajima,
Harningsih Karim
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1341/3/032031
Subject(s) - fermentation , biofuel , raw material , food science , ethanol fuel , hydrolysis , chemistry , cellulose , pulp and paper industry , botany , microbiology and biotechnology , biology , biochemistry , organic chemistry , engineering
Demand for bioethanol in Indonesia will increase with the increase of energy need. Seaweeds, Gracilaria verrucosa and Eucheuma cottonii containing high cellulose content are considered very suitable to be developed in Indonesia and can be used as a raw material for low cost bioethanol production. The seaweeds were obtained from Mandalle, Pangkep Regency, South Sulawesi, Indonesia. The method used in this research was a simultaneous saccharification and fermentation (SSF) process. The results showed that 1. G. verrucosa and E. cottonii seaweeds could be converted into bioethanol having ethanol levels of 5.7% and 6.1%, respectively after 10 days of fermentation. 2. The optimum condition of fermentation process of G. verrucosa and E. cottonii using Clostridium acetobutylicum bacterium to produce ethanol was 10 days fermentation at pH 6.0 with the ethanol level of 7.7% and 7.2%, respectively. 3. The conversion value when G. verucosa cellulose was used as the raw material was 3.33% (33.3 g of bioethanol was produced from every kg of cellulose) with the obtained ethanol having the purity of 96.4%.