Bioethanol Production by Carbohydrate-Enriched Biomass of Arthrospira (Spirulina) platensis

Energies

Giorgos Markou²  Irini Angelidaki¹  Elias Nerantzis³ 

[1] Department of Environmental Engineering, Building 113, Technical University of Denmark, Lyngby 2800, Denmark; E-Mail:;Department of Natural Resources Management and Agricultural Engineering, Agricultural University of Athens, Iera Odos 75, Athens 11855, Greece; E-Mail:;Biotechnology and Industrial Fermentations Lab, Faculty of Food Science and Nutrition, Technological Educational Institution of Athens, Ag. Spyridon Street, Egaleo 12210, Athens, Greece; E-Mail:

关键词: Arthrospira (Spirulina);    bioethanol;    fermentation;    microalgae;    pretreatment;    acid hydrolysis;    thermal hydrolysis;   

DOI  :  10.3390/en6083937

来源: mdpi

【 摘 要 】

In the present study the potential of bioethanol production using carbohydrate-enriched biomass of the cyanobacterium Arthrospira platensis was studied. For the saccharification of the carbohydrate-enriched biomass, four acids (H₂SO₄, HNO₃, HCl and H₃PO₄) were investigated. Each acid were used at four concentrations, 2.5 N, 1 N, 0.5 N and 0.25 N, and for each acid concentration the saccharification was conducted under four temperatures (40 °C, 60 °C, 80 °C and 100 °C). Higher acid concentrations gave in general higher reducing sugars (RS) yields (%, g_RS/g_{Total sugars}) with higher rates, while the increase in temperature lead to higher rates at lower acid concentration. The hydrolysates then were used as substrate for ethanolic fermentation by a salt stress-adapted Saccharomyces cerevisiae strain. The bioethanol yield (%, g_EtOH/g_Biomass) was significantly affected by the acid concentration used for the saccharification of the carbohydrates. The highest bioethanol yields of 16.32% ± 0.90% (g_EtOH/g_Biomass) and 16.27% ± 0.97% (g_EtOH/g_Biomass) were obtained in hydrolysates produced with HNO₃ 0.5 N and H₂SO₄ 0.5 N, respectively.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.