@article{(Open Science Index):https://publications.waset.org/pdf/9999837, title = {Bioethanol: Indonesian Macro-Algae as a Renewable Feedstock for Liquid Fuel}, author = {T. Poespowati and E. Marsyahyo and R. Kartika-Dewi}, country = {}, institution = {}, abstract = {This experimental study aims at studying the conversion of macro-algae into bioethanol under several steps of procedure: preparation, pre-treatment, fermentation, and distillation. The main objective of this work was to investigate the role of buffer’s type as a stabiliser of pH level and fermentation time on the yield of ethanol. For this purpose, experiments were carried out on biomass macro-algae to de-couple the pre-treatment and fermentation processes from those associated with distillation process. β- glucosidase was used as cellulose decomposer during hydrolysis step and yeast was used during fermentation process. The species of macro-algae utilised as energy feedstock was Ulva lactuca and it was harvested from southern coast of Central of Java Island – Indonesia. Experiments were conducted in a simple fermenter over a different buffer: citrate buffer and acetic buffer, and over a range of fermentation times between 5 to 20 days. The ethanol production was found to be significantly affected by both variables. The optimum time of fermentation was 10 days with citrate buffer; result in 0.88458% of ethanol, and the ethanol content after distillation process was shown 0.985015%. }, journal = {International Journal of Energy and Power Engineering}, volume = {8}, number = {12}, year = {2014}, pages = {1325 - 1328}, ee = {https://publications.waset.org/pdf/9999837}, url = {https://publications.waset.org/vol/96}, bibsource = {https://publications.waset.org/}, issn = {eISSN: 1307-6892}, publisher = {World Academy of Science, Engineering and Technology}, index = {Open Science Index 96, 2014}, }