skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Mixed Carboxylic Acid Production by Megasphaera elsdenii from Glucose and Lignocellulosic Hydrolysate

Journal Article · · Fermentation

Here, volatile fatty acids (VFAs) can be readily produced from many anaerobic microbes and subsequently utilized as precursors to renewable biofuels and biochemicals. Megasphaera elsdenii represents a promising host for production of VFAs, butyric acid (BA) and hexanoic acid (HA). However, due to the toxicity of these acids, product removal via an extractive fermentation system is required to achieve high titers and productivities. Here, we examine multiple aspects of extractive separations to produce BA and HA from glucose and lignocellulosic hydrolysate with M. elsdenii. A mixture of oleyl alcohol and 10% (v/v) trioctylamine was selected as an extraction solvent due to its insignificant inhibitory effect on the bacteria. Batch extractive fermentations were conducted in the pH range of 5.0 to 6.5 to select the best cell growth rate and extraction efficiency combination. Subsequently, fed-batch pertractive fermentations were run over 230 h, demonstrating high BA and HA concentrations in the extracted fraction (57.2 g/L from ~190 g/L glucose) and productivity (0.26 g/L/h). To our knowledge, these are the highest combined acid titers and productivity values reported for M. elsdenii and bacterial mono-cultures from sugars. Lastly, the production of BA and HA (up to 17 g/L) from lignocellulosic sugars was demonstrated.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office (BETO)
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1405918
Report Number(s):
NREL/JA-5100-70383
Journal Information:
Fermentation, Vol. 3, Issue 1; ISSN 2311-5637
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

References (42)

Ketonization of Carboxylic Acids by Decarboxylation: Mechanism and Scope journal March 2005
Electrochemistry for biofuel generation: Electrochemical conversion of levulinic acid to octane journal January 2012
Reduction of Furfural to Furfuryl Alcohol by Ethanologenic Strains of Bacteria and Its Effect on Ethanol Production from Xylose book January 2002
Effects of extracellular pH on the intracellular pH, membrane potential, and growth yield of Megasphaera elsdenii in relation to the influence of monensin, ethanol, and acetate. journal January 1991
Biological formation of caproate and caprylate from acetate: fuel and chemical production from low grade biomass journal January 2011
Understanding biocatalyst inhibition by carboxylic acids journal January 2013
New reactive extraction systems for separation of bio-succinic acid journal February 2011
Another explanation for the toxicity of fermentation acids at low pH: anion accumulation versus uncoupling journal November 1992
Efficient utilization of hemicellulose hydrolysate for propionic acid production using Propionibacterium acidipropionici journal June 2012
Butyric acid production by Clostridium butyricum with integrated extraction and pertraction journal October 1999
Inhibition of growth of Zymomonas mobilis by model compounds found in lignocellulosic hydrolysates journal January 2013
In Situ Biphasic Extractive Fermentation for Hexanoic Acid Production from Sucrose by Megasphaera elsdenii NCIMB 702410 journal June 2013
The Future of Butyric Acid in Industry journal January 2012
Short- and medium-chain fatty acids exhibit antimicrobial activity for oral microorganisms journal July 2011
Conversion of Sugarcane Bagasse to Carboxylic Acids Using a Mixed Culture of Mesophilic Microorganisms journal January 2003
Chain Elongation with Reactor Microbiomes: Open-Culture Biotechnology To Produce Biochemicals journal February 2016
In situ extractive fermentation for the production of hexanoic acid from galactitol by Clostridium sp. BS-1 journal August 2013
Fermentation of Reactive-Membrane-Extracted and Ammonium-Hydroxide-Conditioned Dilute-Acid-Pretreated Corn Stover journal December 2011
Production of medium-chain volatile fatty acids by mixed ruminal microorganisms is enhanced by ethanol in co-culture with Clostridium kluyveri journal January 2015
Production of medium-chain carboxylic acids by Megasphaera sp. MH with supplemental electron acceptors journal June 2016
Quantitative analysis of growth and volatile fatty acid production by the anaerobic ruminal bacterium Megasphaera elsdenii T81 journal December 2012
Extractive Fermentation for Enhanced Propionic Acid Production from Lactose by Propionibacterium acidipropionici journal June 1998
Long-Term n -Caproic Acid Production from Yeast-Fermentation Beer in an Anaerobic Bioreactor with Continuous Product Extraction journal June 2015
Catalytic Conversion of Renewable Biomass Resources to Fuels and Chemicals journal June 2010
Transformation of Biomass into Commodity Chemicals Using Enzymes or Cells journal August 2013
High n-caprylate productivities and specificities from dilute ethanol and acetate: chain elongation with microbiomes to upgrade products from syngas fermentation journal January 2016
Preparation of volatile fatty acid (VFA) calcium salts by anaerobic digestion of glucose: Preparation of Volatile Fatty Acid Calcium Salts by Anaerobic Digestion of Glucose journal January 2015
Accounting for all sugars produced during integrated production of ethanol from lignocellulosic biomass journal April 2016
Chain elongation with reactor microbiomes: upgrading dilute ethanol to medium-chain carboxylates journal January 2012
DMR (deacetylation and mechanical refining) processing of corn stover achieves high monomeric sugar concentrations (230 g L −1 ) during enzymatic hydrolysis and high ethanol concentrations (>10% v/v) during fermentation without hydrolysate purification or concentration journal January 2016
Catalytic coupling of carboxylic acids by ketonization as a processing step in biomass conversion journal August 2009
Carboxylate Platform: The MixAlco Process Part 1: Comparison of Three Biomass Conversion Platforms journal January 2009
Extractive fermentation for butyric acid production from glucose byClostridium tyrobutyricum journal February 2003
Fermentation of corn stover to carboxylic acids journal May 2003
Improving medium chain fatty acid productivity using chain elongation by reducing the hydraulic retention time in an upflow anaerobic filter journal May 2013
Application of reactive extraction to recovery of carboxylic acids journal December 2001
Isolation, characterization, and quantification of Clostridium kluyveri from the bovine rumen journal December 2011
Conversion of furfural in aerobic and anaerobic batch fermentation of glucose by Saccharomyces cerevisiae journal January 1999
Succinic acid production on xylose-enriched biorefinery streams by Actinobacillus succinogenes in batch fermentation journal February 2016
Waste to bioproduct conversion with undefined mixed cultures: the carboxylate platform journal February 2011
Production of Hexanoic Acid by Free and Immobilised Cells ofMegasphaera elsdenii: Influence of in-situ Product Removal Using Ion Exchange Resin journal July 1997
Properties of a Fatty acid Forming Organism Isolated from the Rumen of Sheep journal January 1956

Cited By (4)

Organic phase screening for in‐stream reactive extraction of bio‐based 3‐hydroxypropionic acid: biocompatibility and extraction performances journal December 2019
In situ product recovery of bio-based ethyl esters via hybrid extraction-distillation journal January 2019
Increasing the economic value of lignocellulosic stillage through medium-chain fatty acid production journal July 2018
Biochemical Production and Separation of Carboxylic Acids for Biorefinery Applications journal May 2017