Enhancing Bioethanol Fermentation through Removal of Acetic Acid Using Liquid-Liquid Extraction

<p>The concern for the ever growing human population as well as the depletion of fossil fuel resources and their impact on global warming have long been motivations for the researchers to investigate means for sustainable producing carbon-neutral energy. Second-generation biofuel refers to liquid fuels that are produced from non-food resources and reduce the total greenhouse gas emission by at least 60 %. Acetic acid has been shown to be one of the most ubiquitous fermentation inhibitors in a bioethanol production facility which slows down the bioethanol production and reduces its yield through inhibition of the ethanol producing microorganisms. The use of liquid-liquid extraction has shown to be a viable tool to remove the acetic acid from corn stover hydrolysate. Extraction coupled with a solvent recovery unit enhances the bioethanol production through improving the product yield as well as its production rate.</p> <p>Economic assessment of the proposed system showed that incorporating the extraction unit within an industrial scale corn stover bioethanol production plant is a feasible option which can drop the MESP by up to $0.35/gal.</p>

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Agricultural and Biological Engineering

Year

2016

Author dc:creator

• Aghazadeh, Mahdieh

Contributors dc:contributor

• Abigail S. Engelberth
• John Howarter
• Michael Ladisch
• Nathan Mosier
• Nien-Hwa Linda Wang

• Applied sciences
• Acetic acid
• Bioethanol
• Cost analysis
• Extraction
• Fermentation
• Inhibition
• Agriculture
• Bioresource and Agricultural Engineering

Repository record dc:identifier

https://docs.lib.purdue.edu/open_access_dissertations/614

OAI identifier oai:identifier

oai:docs.lib.purdue.edu:open_access_dissertations-1717