Journal
BIORESOURCE TECHNOLOGY
Volume 114, Issue -, Pages 342-348Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2012.03.049
Keywords
Biofuel; Microalgae; Anaerobic fermentation; Biochemical composition; Immobilized cells
Funding
- Department of Priority Directions of Science and Technologies of the Ministry of Education and Science of the Russian Federation [16.512.11.2181]
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The purpose of this work was to study the possible use of pretreated biomass of various microalgae and cyanobacteria as substrates for acetone-butanol-ethanol (ABE) fermentation by Clostridium acetobutylicum cells immobilized into poly(vinyl alcohol) cryogel. To this end, the biochemical composition of photosynthetic microorganisms cultivated under various conditions was studied. The most efficient technique for pretreating microalgal biomass for its subsequent conversion into biofuels appeared to be thermal decomposition at 108 degrees C. For the first time the maximum productivity of the ABE fermentation in terms of hydrogen (8.5 mmol/L medium/day) was obtained using pretreated biomass of Nannochloropsis sp. Maximum yields of butanol and ethanol were observed with Arthrospira platensis biomass used as the substrate. Immobilized Clostridium cells were demonstrated to be suitable for multiple reuses (for a minimum of five cycles) in ABE fermentation for producing biofuels from pretreated microalgal biomass. (C) 2012 Elsevier Ltd. All rights reserved.
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