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Related Concept Videos

Biofuels01:25

Biofuels

The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
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Bioremediation is an environmentally sustainable process that employs living organisms—primarily microorganisms—to degrade or neutralize pollutants from contaminated environments. In oil spills and hydrocarbon pollution, bioremediation involves the use of hydrocarbon-degrading bacteria to transform toxic compounds into less harmful substances. This approach leverages natural microbial metabolic processes and is considered both cost-effective and ecologically favorable compared to physical or...
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Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
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The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...
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Experimental Protocol for Biodiesel Production with Isolation of Alkenones as Coproducts from Commercial Isochrysis Algal Biomass
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Published on: June 24, 2016

Oil extraction from microalgae for biodiesel production.

Ronald Halim1, Brendan Gladman, Michael K Danquah

  • 1Bio Engineering Laboratory, Department of Chemical Engineering, Monash University, Clayton, Victoria 3800, Australia. ronald.halim@eng.monash.edu.au

Bioresource Technology
|July 27, 2010
PubMed
Summary
This summary is machine-generated.

Supercritical carbon dioxide and hexane extraction methods were compared for marine microalgae lipids. Hexane extraction proved effective for biodiesel production, even from wet algal paste.

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Area of Science:

  • Biotechnology
  • Renewable Energy
  • Algal Biotechnology

Background:

  • Microalgae are a promising source for sustainable biodiesel production.
  • Efficient lipid extraction is crucial for economic viability.
  • Marine Chlorococcum sp. offers potential for biofuel feedstock.

Purpose of the Study:

  • To evaluate supercritical carbon dioxide (SCCO2) and hexane extraction efficiencies for marine microalgae lipids.
  • To determine the suitability of extracted lipids for biodiesel production.
  • To optimize extraction parameters for enhanced lipid yield.

Main Methods:

  • Lipid extraction using supercritical carbon dioxide (SCCO2) and hexane.
  • Analysis of lipid yield and fatty acid profiles.
  • Investigation of SCCO2 extraction parameters (temperature, pressure) and hexane extraction conditions (co-solvent, biomass state).

Main Results:

  • Marine Chlorococcum sp. yielded a maximum of 7.1 wt% lipids, with a favorable fatty acid profile for biodiesel (high C18:1 content).
  • SCCO2 extraction efficiency increased with higher pressure and lower temperature.
  • Hexane extraction yielded comparable results for both dried and wet microalgal biomass, enhanced by isopropanol co-solvent and continuous Soxhlet operation.

Conclusions:

  • Both SCCO2 and hexane extraction are viable for obtaining algal lipids for biodiesel.
  • Hexane extraction offers advantages in terms of biomass state flexibility (wet or dry) and co-solvent enhancement.
  • Further optimization of extraction conditions can improve lipid yields for industrial-scale biodiesel production.