Google Play icon

New method for making biofuels is cheaper and better for the environment

Share
Posted January 22, 2016

Chemical and Biomolecular Engineers from the Melbourne School of Engineering have discovered a new way to deliver carbon dioxide to microalgae, which in turn, can be harvested to make renewable fuels such as biodiesel.

Carbon dioxide is well known to speed up the growth of microalgae.

However, the carbon dioxide has to be free of contamination or the algae die. Published in the research journal, Energy and Environmental Science, the new method purifies the carbon dioxide that is in power station flue gases by absorbing it into a liquid.

Carbon dioxide delivered to microalgae can be harvested to make renewable fuels.Image credit: The University of Melbourne

Carbon dioxide delivered to microalgae can be harvested to make renewable fuels. Image credit: The University of Melbourne

This liquid is then pumped through hollow fibre membranes. These hollow fibre membranes are like very long drinking straws, which can be immersed into the microalgae beds.

Professor Sandra Kentish, Head of the Chemical Engineering Department at the University of Melbourne and leader of the research team said that supplying purified carbon dioxide by extracting it from flue gases can work, but it is expensive and takes a lot of energy.

“In this work, we have found a way to purify the carbon dioxide and to supply it to the microalgae for a much more moderate cost and using a lot less energy,” Professor Kentish said.

“The CO2 moves directly from the liquid into the microalgae culture by permeating through the fibre walls. Aside from being a cheaper approach, our research has shown that the microalgae grow faster than in other work done to date,” said another team member, Dr Greg Martin.

Other products such as chemicals, proteins and nutraceuticals can also be produced using the same approach. The experiments were completed by PhD student, Qi Zheng, who is now undertaking further experiments to find the optimum liquid composition.

Source: The University of Melbourne

Featured news from related categories:

Technology Org App
Google Play icon
85,355 science & technology articles

Most Popular Articles

  1. New treatment may reverse celiac disease (October 22, 2019)
  2. "Helical Engine" Proposed by NASA Engineer could Reach 99% the Speed of Light. But could it, really? (October 17, 2019)
  3. New Class of Painkillers Offers all the Benefits of Opioids, Minus the Side Effects and Addictiveness (October 16, 2019)
  4. The World's Energy Storage Powerhouse (November 1, 2019)
  5. Plastic waste may be headed for the microwave (October 18, 2019)

Follow us

Facebook   Twitter   Pinterest   Tumblr   RSS   Newsletter via Email