Paper details

Title:

Syngas and Greenhouse Gas (CO2) Bioconversion to Biofuels and Bioproducts: the Potential of Acetogenic Bacteria

Author(s):

Kennes, C., Iglesias, R.R., Fernandez Blanco, C. , Veiga, M.C.

Document(s):

Abstract:

Syngas, obtained from the gasification of feedstocks such as biomass or waste, contains volatile substrates (CO, H2, CO2) that can be metabolized by acetogenic bacteria. Native bacteria belonging to this group can produce acids (mainly acetic acid) and, occasionally, alcohols (mainly ethanol), which are valuable commercial biofuels and bioproducts. However, these acids and alcohols can in turn also further be metabolized, either individually or in mixtures, by other aerobic or anaerobic microorganisms, e.g., bacteria, yeasts, fungi, to produce a range of additional valuable bioproducts, such as medium chain fatty acids (e.g., caproic and caprylic acids), biopolymers (e.g., Poly-Hydroxy-Alkanoates), microbial oils (FAME), generally in integrated two-stage processes. Recombinant acetogenic bacteria allow to still further increase the range of possible bioproducts, to chemicals such as acetone, among others. Following a similar approach, this technology is also suitable for the mitigation and valorization of industrial carbon dioxide emissions.

Keywords:

biofuel, biorefinery, CO₂ capture, gasification, residues, anaerobic process

Topic:

Biomass Conversion to Intermediate Bioenergy Carriers, Sustainable Biofuels and Bio-Based Products

Subtopic:

Biorefineries

Event:

29th European Biomass Conference and Exhibition

Session:

3BO.3.4

Pages:

723 - 726

ISBN:

978-88-89407-21-9

Paper DOI:

10.5071/29thEUBCE2021-3BO.3.4

Price:

FREE