Paper details

Title:

Biomass and Greenhouse Gases (CO₂) as Feedstocks for their Anaerobic Bioconversion into Microbial Oils for Biofuels

Author(s):

Robles Iglesias, R., Naveira-Pazos, C., Veiga, M.C., Kennes, C.

Document(s):

Abstract:

This study demonstrates the potential of oleaginous yeasts, combined in an integrated process with acetogenic bacteria, to convert syngas or CO2 into microbial oils for biofuels. Clostridium aceticum and Acetobacterium woodii are acetogenic bacteria capable of producing acetic acid in high concentrations from CO2 in the presence of H2 as an energy source. This way of reducing CO2 emissions by converting them into acetic acid can be implemented with the further bioconversion of the obtained acetic acid into lipids (microbial oils) by Rhodosporidium toruloides in a second step. The results obtained in this work were promising, highlighting that R. toruloides is able to produce somewhat more than 40% (g/g) and about 20% (g/g) of lipid content from acetic acid produced either by C. aceticum and A. woodii, respectively. Furthermore, the lipid composition obtained corroborated the great potential of this process for biodiesel production. Overall, these results indicate that lipids can be produced using renewable feedstocks and pollutants, thus reducing the cost of biodiesel production and contributing to greenhouse gas mitigation.

Keywords:

biodiesel, gasification, anaerobic process, carbon dioxide (CO₂), acetogenic bacteria, greenhouse gas residues

Topic:

Biomass Conversion to Intermediate Bioenergy Carriers and Sustainable Biofuels

Subtopic:

Oil-based and renewable hydrocarbon biofuels

Event:

30th European Biomass Conference and Exhibition

Session:

5BV.6.3

Pages:

906 - 909

ISBN:

978-88-89407-22-6

Paper DOI:

10.5071/30thEUBCE2022-5BV.6.3

Price:

FREE