Co-Production of Bio-Ethanol and Bio-Oil from Different Species of Macroalgae

摘要

This paper proposed a methodology to realize the co-production of bio-ethanol and bio-oil from macroalgae. Bio-ethanol were obtained from three different species of macroalgae (Enteromorpha prolifera, Undaria pinnatifida and Gelidium amansii) by hydrolysis and fermentation. And then the residues after hydrolysis were converted into bio-oil with high heating value via deoxy-liquefaction. The yield of reducing sugar and bio-ethanol from three macroalgae were calculated. The red algae (Gelidium amansii) produced the reducing sugar with largest yield of 320 +/- 4.1 mg/g and ethanol with a maximum content of 9.09 +/- 0.07 g/L. Besides, the properties and components of the liquid oils have been analyzed and compared with each other. The lower oxygen content (4.47 %, 4.98 % and 4.02 %) and higher heating value (45.06, 44.53 and 45.12 MJ/kg) of the liquid oils were detected respectively. The results indicated that macroalgae had a great potential for co-production of bio-ethanol and high-quality bio-oil.