Extraction and conversion pathways for microalgae to biodiesel: a review focused on energy consumption

Boer, Karne de; Moheimani, Navid R.; Borowitzka, Michael A.; Bahri, Parisa A.

doi:10.1007/s10811-012-9835-z

Cited by 168 publications

(73 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In conventional commercial trans-esterification processes the biomass needs to be dry (Hidalgo et al 2013) b. The cell wall may require disruption to release the lipid which is energetically demanding (de Boer et al 2012). …”

Section: Biodiesel and Trans-esterificationmentioning

confidence: 99%

“…Wet solvent extraction of lipid from microalgae biomass which eliminates the need for drying and potentially reducing energy input may be possible, but has yet to be proven at industrial scale (de Boer et al 2012;Lardon et al 2009;Sills et al 2012); but for microalgal biofuels to yield net gains in energy lipid extraction methods for wet biomass must be developed (Sills et al 2012;Delrue et al 2012). …”

Section: Biodiesel and Trans-esterificationmentioning

confidence: 99%

“…Mechanical pressing is the industry standard for oil recovery from oilseeds for both food and biofuel production, but it is ineffective for microalgae (de Boer et al 2012). increasing the biomass water content decreases trans-esterification efficiency (Hidalgo et al 2013).…”

Section: Biodiesel and Trans-esterificationmentioning

confidence: 99%

“…The amount of methanol required for biodiesel production by in-situ trans-esterification is 'extremely high' and will need to be reduced for the process to become economic (Velasquez-Orta et al 2012). In-situ transesterification also faces energetic hurdles, due to the large volumes of water, solvents or reactant that need to be evaporated from the biomass, and these must be overcome if it is to be energetically viable (de Boer et al 2012).…”

Section: Biodiesel and Trans-esterificationmentioning

confidence: 99%

“…Unfortunately not all microalgal lipids are suitable for conversion to biodiesel by trans-esterification (Chisti 2007). The presence of lipids other than triglyceride may require energy intensive pretreatment steps before the alkaline trans-esterification (de Boer et al 2012).…”

Section: Biodiesel and Trans-esterificationmentioning

confidence: 99%

See 4 more Smart Citations

Methods of energy extraction from microalgal biomass: a review

Milledge

Heaven

2014

Rev Environ Sci Biotechnol

View full text Add to dashboard Cite

Section: Biodiesel and Trans-esterificationmentioning

confidence: 99%

Section: Biodiesel and Trans-esterificationmentioning

confidence: 99%

Section: Biodiesel and Trans-esterificationmentioning

confidence: 99%

Section: Biodiesel and Trans-esterificationmentioning

confidence: 99%

Section: Biodiesel and Trans-esterificationmentioning

confidence: 99%

See 3 more Smart Citations

Methods of energy extraction from microalgal biomass: a review

Milledge

Heaven

2014

Rev Environ Sci Biotechnol

View full text Add to dashboard Cite

Algae Biofuels

Chiaramonti

Tredici

Prussi

et al. 2015

Handbook of Clean Energy Systems

View full text Add to dashboard Cite

Biofuels represent today a global commodity, with 110 billion liters produced in 2012, covering approximately 3% of world's transport fuel demand (on an energy equivalent base): IEA estimates that the world biofuels production will reach 2.36 mb/day (135 billion liters/year) in 2018, equal to 4% road transport fuel demand, an increase of 0.48 mb/day compared to 2012. In parallel to increased production, thanks to advanced biofuel technology development and commercialization, further optimization and process integration of conventional technologies will promote the use of unconventional feedstock. Among these, algae are expected to play a major role in the medium‐to‐long‐term scenario, especially in the biorefinery configuration. Algae, in fact, offer a very attractive opportunity for sustainable biofuels and biochemicals/food/feed production, given their high productivity per unit land and their unique biochemical characteristics. On the other hand, the development of commercially viable algae production routes still represents a major challenge, either from a strictly technical or from an economic viewpoint. This article briefly examines the basic issues in algae cultivation and conversion to biofuel: first, the peculiar characteristics of this unconventional biomass feedstock are described, and then cultivation techniques are shown, focusing on microalgae. Market opportunities for algae products are also addressed and fundamental economic considerations are developed.

show abstract

Enzymatic cell disruption of microalgae biomass in biorefinery processes

Demuez

Mahdy

Tomás‐Pejó

et al. 2015

Biotech & Bioengineering

150

View full text Add to dashboard Cite

When employing biotechnological processes for the procurement of biofuels and bio-products from microalgae, one of the most critical steps affecting economy and yields is the "cell disruption" stage. Currently, enzymatic cell disruption has delivered effective and cost competitive results when compared to mechanical and chemical cell disruption methods. However, the introduction of enzymes implies additional associated cost within the overall process. In order to reduce this cost, autolysis of microalgae is proposed as alternative enzymatic cell disruption method. This review aims to provide the state of the art of enzymatic cell disruption treatments employed in biorefinery processes and highlights the use of endopeptidases. During the enzymatic processes of microalgae life cycle, some lytic enzymes involved in cell division and programmed cell death have been proven useful in performing cell lysis. In this context, the role of endopeptidases is emphasized. Mirroring these natural events, an alternative cell disruption approach is proposed and described with the potential to induce the autolysis process using intrinsic cell enzymes. Integrating induced autolysis within biofuel production processes offers a promising approach to reduce overall global costs and energetic input associated with those of current cell disruption methods. A number of options for further inquiry are also discussed.

show abstract

Extraction and conversion pathways for microalgae to biodiesel: a review focused on energy consumption

Cited by 168 publications

References 61 publications

Methods of energy extraction from microalgal biomass: a review

Methods of energy extraction from microalgal biomass: a review

Algae Biofuels

Enzymatic cell disruption of microalgae biomass in biorefinery processes

Contact Info

Product

Resources

About