Recycle of fermentation process water through mitigation of inhibitors in dilute-acid corn stover hydrolysate

2020 ◽  
Vol 9 ◽  
pp. 100349 ◽  
Author(s):  
Nancy N. Nichols ◽  
Jeffrey A. Mertens ◽  
Bruce S. Dien ◽  
Ronald E. Hector ◽  
Sarah E. Frazer
Keyword(s):  
Corn Stover ◽  
Fermentation Process ◽  
Process Water ◽  
Dilute Acid ◽  
Corn Stover Hydrolysate

scholarly journals Abatement of Inhibitors in Recycled Process Water from Biomass Fermentations Relieves Inhibition of a Saccharomyces cerevisiae Pentose Phosphate Pathway Mutant

Fermentation ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 107
Author(s):  
Nancy N. Nichols ◽  
Ronald E. Hector ◽  
Jeffrey A. Mertens ◽  
Sarah E. Frazer
Keyword(s):  
Saccharomyces Cerevisiae ◽  
Fermentation Process ◽  
Pentose Phosphate ◽  
Process Water ◽  
Dilute Acid ◽  
Fermentation Inhibitors ◽  
Acid Hydrolysate ◽  
Fuels And Chemicals ◽  
Biomass Hydrolysates ◽  
Water Inhibition

Understanding the nature of fermentation inhibition in biomass hydrolysates and recycled fermentation process water is important for conversion of biomass to fuels and chemicals. This study used three mutants disrupted in genes important for tolerance to either oxidative stress, salinity, or osmolarity to ferment biomass hydrolysates in a xylose-fermenting Saccharomyces cerevisiae background. The S. cerevisiaeZWF1 mutant with heightened sensitivity to fermentation inhibitors was unable to ferment corn stover dilute-acid hydrolysate without conditioning of hydrolysate using a fungal strain, Coniochaeta ligniaria, to consume inhibitors. Growth of two other strains, a salt-sensitive HAL4 mutant and a GPD1 mutant sensitive to osmotic stress, was not negatively affected in hydrolysate compared to the parent xylose-metabolizing strain. In recycled fermentation process water, inhibition of the ZWF1 mutant could again be remediated by biological abatement, and no effect on growth was observed for any of the mutants compared to the parent strain.

scholarly journals Propionic acid production from corn stover hydrolysate by Propionibacterium acidipropionici

2017 ◽  
Vol 10 (1) ◽  
Author(s):  
Xiaoqing Wang ◽  
Davinia Salvachúa ◽  
Violeta Sànchez i Nogué ◽  
William E. Michener ◽  
Adam D. Bratis ◽  
...  
Keyword(s):  
Corn Stover ◽  
Propionic Acid ◽  
Acid Production ◽  
Propionibacterium Acidipropionici ◽  
Propionic Acid Production ◽  
Corn Stover Hydrolysate
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