Potato Peels and Mixed Grasses as Raw Materials for Biofuel Production

Shaaban Z. Omar; Ayad H. Hasan; Ivo Lalov

doi:10.14500/aro.10568

Shaaban Z. Omar Department of Medical Microbiology, Faculty of Science and Health, Koya University, Daniel Mitterrand Boulevard, Koya KOY45, Kurdistan Region http://orcid.org/0000-0003-3633-2421
Ayad H. Hasan Department of Medical Microbiology, Faculty of Science and Health, Koya University, Daniel Mitterrand Boulevard, Koya KOY45, Kurdistan Region http://orcid.org/0000-0001-7280-2254
Ivo Lalov Department of Biotechnology, Faculty of Chemical System Engineering, University of Chemical Technology and Metallurgy, 8 Kliment Ohridski Blvd, 1756, Sofia http://orcid.org/0000-0002-3889-8464

Keywords: Acid hydrolysis, Biogas, Biomethanation, Enzymatic hydrolysis

Abstract

Biogas and fuel ethanol are renewable energy sources, can be produced from complex organic materials that are decomposed by microorganisms in the anaerobic digestion method. Potato peels (PPs) and mixed Lolium perenne and Dactylis glomerata grasses were assessed as a potential substrate for biomethanation in a batch method under mesophilic condition (35°C) and ethanol fermentation. The first approach of this work was focused on pretreatment of PPs using acidic and enzymatic hydrolysis to produce biogas and ethanol fermentation using Saccharomyces cerevisiae and Safbrew S-33. These experiments proved that enzymatic hydrolysis produced 1.2 g/L of ethanol involved 115 h of fermentation and 665 ml/h of biogas after 451 h of biomethanation, this was more than the outcomes of acidic treatment. The second approach was concentrated on ability of biogas and ethanol production from mixed grasses treated with different acid concentrations that produced 0.16 g/L ethanol over 8 days of fermentation and 500 ml/h of biogas after 13 days of methanation technique. In general, the results pointed out that PPs and combined grasses can be used as potential substrates with raw materials for biogas and ethanol production.

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Author Biographies

Shaaban Z. Omar, Department of Medical Microbiology, Faculty of Science and Health, Koya University, Daniel Mitterrand Boulevard, Koya KOY45, Kurdistan Region

Shaaban Z. Omer is an assistant Biology at Medical Microbiology Department, Faculty of Science and Health, Koya University. He got the B.Sc. in Biology from Koya University and he got his M.Sc. in Biotechnology at the same University. His research interest is Biotechnology.

Ayad H. Hasan, Department of Medical Microbiology, Faculty of Science and Health, Koya University, Daniel Mitterrand Boulevard, Koya KOY45, Kurdistan Region

Ayad H. Hasan is an assistant professor of Molecular Microbiology. He obtained BSc degree in Biology and MSc degree in Biotechnology from Mosul University and PhD degree in Molecular Microbiology from Leeds University, UK. He currently service as head of Medical Microbiology department at Koya University. He is a member of The Biochemical Society and Society for General Microbiology. His research interest includes secondary metabolism in Streptomyces and drug discovery.

Ivo Lalov, Department of Biotechnology, Faculty of Chemical System Engineering, University of Chemical Technology and Metallurgy, 8 Kliment Ohridski Blvd, 1756, Sofia

Ivo Lalov is a professor at the Department of biotechnology, Faculty Chemical and Systems Engineering, University of Chemical Technology and Metallurgy. He got the B.Sc., MSc and PhD degrees in Biotechnoloby. His research interests are in Biofuel, water treatment and biotechnology

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