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Continuous culture methodology for the screening of microalgae for oil

Paper ID Volume ID Publish Year Pages File Format Full-Text
22931 43401 2015 5 PDF Available
Title
Continuous culture methodology for the screening of microalgae for oil
Abstract

•A continuous culture methodology is established for the screening of microalgae for oil.•This reliable system allows actual evaluation of fatty acid productivity.•Moderate nitrogen limitation results in improved fatty acid profile.•Actual fatty acid productivity has been determined for 10 microalgae.•Values of up to 109 mg fatty acid L−1 d−1 have been recorded.

A basic criterion in the selection of microalgae suitable as source of oil for biodiesel should be their actual capacity to produce lipids or, more properly, the fatty acid yield. Performance assessment of 10 preselected microalgae under both batch and continuous culture points to the latter approach as the most adequate for evaluating fatty acid productivity. Differences were patent in continuous culture among strains that otherwise had analogous oil accumulation potential under batch culture. Some promising strains under batch culture (like Muriella aurantiaca and Monoraphidium braunii) exhibited, however, values for actual fatty acid productivity lower than 40 mg L−1 d−1 in continuous regime. The analysis performed in photochemostat under continuous culture regime revealed the great potential of Chlorococcum olefaciens, Pseudokirchneriella subcapitata and Scenedesmus almeriensis as oil producing microalgae. Fatty acid productivity levels over 90 mg L−1 d−1 were recorded for the latter strains under moderate nitrogen limitation, conditions which led to an enrichment in saturated and monounsaturated fatty acids, a more suitable profile as raw material for biodiesel. The continuous culture methodology employed represents a sound procedure for screening microalgae for biofuel production, providing a reliable evaluation of their fatty acid production capacity, under conditions close to those of outdoor production systems.

Keywords
Microalgae; Continuous culture; Photochemostat; Fatty acid productivity; Biodiesel
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 195, 10 February 2015, Pages 103–107
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us