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All Journal Eksergi: Chemical Engineering Journal
Rahayu Setiyaningtyas
Chemical Engineering Universitas Pembangunan Nasional "Veteran" Yogyakarta
Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Bioethanol Production From Green Algae Spirogyra sp Danang Jaya; Rahayu Setiyaningtyas; Sudiyono Prasetyo
Eksergi Vol 15, No 1 (2018): Vol 15, No 1 (2018)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v15i1.2290

Abstract

Bioethanol is an alternative fuel that has potential to replace the oil fuel. The bioethanol feedstock can be derived from the green algae Spirogyra sp that is rarely exploited. High carbohydrates content in the Spirogyra sp algae is highly potential to be developed into ethanol through chemical and biological processes. This research is done through several stages: preparation of raw material, hydrolysis using sulfuric acid 0,2 M, and fermentation using Saccharomyses cerevisiae in an anaerob condition. The objective of this study is to find out the optimum reaction time and optimum quantity of Saccharomyses cerevisiae in the fermentation process. Variations of reaction time and yeast quantity are applied; those are 3, 4, 5 and 6 days for reaction time, and 0,5%; 0,75%; 1%; 1,25%; 1,5%; and 1,75% for yeast quantity. The stoichiometric calculation is used to analyse the result of this experiment. The result shows that the optimum duration for the fermentation is 5 days and the optimum quantity of yeast is 1% by weight. The condition of fermentation process must be held in pH of 4,5 and temperature of 30oC. The produced alcohol in those condition is 0,0613 mol.
Co-Authors Danang Jaya Sudiyono Prasetyo