Click here for more information about Algenuity
Click here for more information about LiqofluxPhenometrics Buy 3 Get 1 Free
Visit cricatalyst.com!Evodos Separation Technology

Research

Fast, low energy, and continuous biofuel extraction from microalgae

April 28, 2017
AlgaeIndustryMagazine.com

a) This is a colony full of cells (red) with polysaccharides (yellow) and hydrocarbons (green) leaving the colony (x20). b) parts of colony tightly packed together (x60). c) colony full of cells (red) with dichotomial ramification of polysaccharides (yellow) and hydrocarbons leaving the colony (green) (x100). d) Single cell (x100 and numerically magnified). (Adapted from Guionet, A., Hosseini, B., Teissie, J., Akiyama, H., & Hosseini, H. (2017). A new mechanism for efficient hydrocarbon electro-extraction from Botryococcus braunii. Biotechnology for Biofuels, 10(1), 39. DOI: 10.1186/s13068-017-0724-1). Credit: Professor Hamid Hosseini

PhysOrg reports that recent efforts have been made by researchers in Japan to reduce the cost of biodiesel production by using pulsed electric fields (PEF) to extract hydrocarbons from microalgae.

A milli- or microsecond PEF is typically used to weaken cell walls and increase permeability allowing for extraction of elements inside the cell. Kumamoto University researchers, on the other hand, used a nanosecond PEF (nsPEF) to focus on the microalgae matrix instead of the cells. A nsPEF generally uses less energy than the μs/msPEFs even at high voltages, and is not as destructive or costly as the traditional drying method of oil extraction.

The researchers performed several tests with the nsPEF on the microalgae Botryococcus braunii (Bb) to determine the optimal electric field, energy, and pulse repetition frequency for hydrocarbon extraction. At 10 Hz, the optimal field and energy conditions were determined to be approximately 50 kV/cm and 55.6 J/ml respectively per volume of algae. Further, the researchers found that pulse frequency had little to no effect on extraction percentage, meaning that a large amount of hydrocarbons may be extracted quickly for large/industrial systems.

“The advantage with this extraction mechanism is that it separates hydrocarbons from a matrix, rather than extracts them from cells. Other microalgae do not secrete a matrix so the cell membranes must be damaged or destroyed to get at the hydrocarbons, which both takes more energy and is less efficient than our method,” said lead researcher, Professor Hamid Hosseini of the Institute of Pulsed Power Science at Kumamoto University.

“On top of that,” he said, “many extraction processes practiced today use a drying method to extract oil, which ends in the destruction of the algae. Our method is relatively non-destructive and the microalgae are able to rebuild their colonies after extraction has finished.”

One minor drawback is the impurity of the matrix; polysaccharides must be purified from the extracted hydrocarbon solution. Fortunately, these molecules may be used in the creation of bioethanol but their concentration is low.

Read More

More Like This…

Copyright ©2010-2019 AlgaeIndustryMagazine.com. All rights reserved. Permission required to reprint this article in its entirety. Must include copyright statement and live hyperlinks. Contact editorial@algaeindustrymagazine.com. A.I.M. accepts unsolicited manuscripts for consideration, and takes no responsibility for the validity of claims made in submitted editorial.

twittertopbarlinks_eventstopbarlinks_requesttopbarlinks_archives

From The A.I.M. Archives

— Refresh Page for More Choices
42 Technology has been appointed by LabXero, acoustic particle filtration technology company, to help develop pilot-scale biomanufacturing equipment that could significan...
The Algae Biomass Organization (ABO) reports the introduction of the Algae Agriculture Act of 2018 (H.R. 5373), a bill that would give algae cultivators and harvesters ma...
Israeli-based Algatechnologies, Ltd. (Algatech) has become the major shareholder in Supreme Health New Zealand, Ltd. (Supreme) to supply the rapidly growing markets in Ch...
Global EcoPower (GEP), of Aix-en-Provence, France, has signed a 5-year partnership contract with the French Alternative Energies and Atomic Energy Commission (CEA). This ...
Hayley Dunning writes from the Imperial College of London that a new discovery has changed our understanding of the basic mechanism of photosynthesis and should rewrite t...
Dartmouth scientists have created a more sustainable feed for aquaculture by using a marine microalga co-product as a feed ingredient. The study is the first of its kind ...
San Diego, CA and Kailua-Kona, HI-based Cellana, Inc. has signed an Asset Purchase Agreement with Cyanotech Corporation for the sale of Cellana’s six-acre production and ...
Cécile Barbière writes for Euractive.fr (translated by Rob Kirby) that, in large greenhouses formerly home to the tomatoes and cucumbers of the market gardening Groupe Ol...
Nature.com reports that swimming algae have been enlisted to carry drugs to individual cells, raising the prospect that such “microswimmers” could deliver targeted therap...
E.A. Crunden writes in thinkprogress.org that Florida’s first gubernatorial debate was dominated by environmental and climate issues, with an emphasis on the state’s alga...
Mazda U.K. has announced that they are currently involved in joint research projects and studies as part of an ongoing industry-academia-government collaboration to promo...
Susan Kraemer writes in solarpaces.org that to use solar thermal energy to convert farmed algae to fuel, the solar fuels research team at Australian National University (...