UV-C-mediated lipid induction and settling, a step change towards economical microalgal biodiesel production

Sharma, Kalpesh, Li, Yan, and Schenk, Peer M. (2014) UV-C-mediated lipid induction and settling, a step change towards economical microalgal biodiesel production. Green Chemistry, 2014 (7). pp. 1-10.

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Microalgae are highly efficient primary producers that can be grown in most types of water on non-arable land as a promising source of biofuel. However, large-scale microalgal biofuel production is currently uneconomical due to slow growth of high-percentage oleaginous algae and large harvesting costs. Here we present a new strategy, using a small dose of externally applied UV-C radiation, that significantly increases lipid contents of fast growing microalgae and that at higher doses also results in rapid settling. The procedure essentially separates biomass growth from lipid accumulation and harvesting which was tested in several microalgal strains and optimized to be completed within 48 h for Tetraselmis sp. using pilot-scale outdoor cultivation. This process resulted in a significant increase of both volumetric and areal lipid productivity with higher polyunsaturated fatty acid contents, while considerably reducing harvesting costs. Other benefits include control of co-cultured microbes and sanitized water for recirculation. UV-C-mediated lipid induction and settling (LIS) may contribute to commercial microalgal biofuel production.

Item ID: 34207
Item Type: Article (Research - C1)
ISSN: 1463-9270
Funders: Australian Research Council (ARC)
Date Deposited: 31 Jul 2014 02:10
FoR Codes: 06 BIOLOGICAL SCIENCES > 0607 Plant Biology > 060701 Phycology (incl Marine Grasses) @ 45%
06 BIOLOGICAL SCIENCES > 0601 Biochemistry and Cell Biology > 060199 Biochemistry and Cell Biology not elsewhere classified @ 55%
SEO Codes: 82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8299 Other Plant Production and Plant Primary Products > 829999 Plant Production and Plant Primary Products not elsewhere classified @ 40%
85 ENERGY > 8505 Renewable Energy > 850501 Biofuel (Biomass) Energy @ 60%
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