scholarly journals Biodiesel Byproduct and Biofuel Synthesizing Clostridium acetobutylicum

2017 ◽  
Vol 6 (1) ◽  
pp. 109-111
Author(s):  
James F. Graves
Keyword(s):  
Optical Density ◽  
Clostridium Acetobutylicum ◽  
Abe Fermentation ◽  
Undetectable Level ◽  
Pure Glycerol ◽  
Base Medium ◽  
Potential Applications ◽  
Acetone Butanol Ethanol

In the manufacture of biodiesel, glycerol is a byproduct.  Acetone-butanol-ethanol (ABE) fermentation by anaerobe Clostridium acetobutylicum ia also a source of biofuel.  Growth of C. acetobutylicum in the presence of waste biodiesel glycerol byproduct was examined in this investigation.  In cultures containing added glucose or a mixture of glucose and byproduct the optical density (OD) was increased and a positive fermentation reaction was exhibited while results in cultures containing byproduct or pure glycerol were similar to those in the base medium.  The pH of cultures containing glucose markedly decreased. The concentration of glucose dropped to an undetectable level.  All cultures were determined to contain alcohol.  The potential applications for biodiesel glycerol byproduct need to e explored. 

scholarly journals Effect of lignocellulose-derived weak acids on butanol production byClostridium acetobutylicumunder different pH adjustment conditions

RSC Advances ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 1967-1975 ◽  
Author(s):  
Jianhui Wang ◽  
Hongyan Yang ◽  
Gaoxaing Qi ◽  
Xuecheng Liu ◽  
Xu Gao ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Formic Acid ◽  
Clostridium Acetobutylicum ◽  
Levulinic Acid ◽  
Abe Fermentation ◽  
Butanol Production ◽  
Weak Acids ◽  
Ph Adjustment ◽  
Acetone Butanol Ethanol

The effects of formic acid, acetic acid and levulinic acid on acetone–butanol–ethanol (ABE) fermentation under different pH adjustment conditions were investigated usingClostridium acetobutylicumas the fermentation strain.

Energy-efficient butanol production by Clostridium acetobutylicum with histidine kinase knockouts to improve strain tolerance and process robustness

2021 ◽  
Author(s):  
Guangqing Du ◽  
Chao Zhu ◽  
Mengmeng Xu ◽  
Lan Wang ◽  
Shang-Tian Yang ◽  
...  
Keyword(s):  
Histidine Kinase ◽  
Energy Efficient ◽  
Clostridium Acetobutylicum ◽  
Abe Fermentation ◽  
Butanol Production ◽  
Process Robustness ◽  
Strain Tolerance ◽  
Acetone Butanol Ethanol

Under stress, Clostridium acetobutylicum sporulates and halts its metabolism, which limits its use in industrial acetone-butanol-ethanol (ABE) fermentation. It is challenging to manipulate the highly regulated sporulation program used by...

Butanol Production Using Carbohydrate-Enriched Chlorella vulgaris as Feedstock

2013 ◽  
Vol 830 ◽  
pp. 122-125 ◽  
Author(s):  
Yue Wang ◽  
Wan Qian Guo ◽  
Jo Shu Chang ◽  
Nan Qi Ren
Keyword(s):  
Sulfuric Acid ◽  
Chlorella Vulgaris ◽  
Clostridium Acetobutylicum ◽  
Cost Effective ◽  
Abe Fermentation ◽  
Third Generation ◽  
Butanol Production ◽  
Butanol Fermentation ◽  
Acetone Butanol Ethanol ◽  
Pretreated Biomass

Butanol is considered as a potential fuel due to several advantage over ethanol. However, it is still of urgent demand to identify better feedstock, which is more renewable and cost-effective, for the production of bio-butanol. Microalgae can mitigate CO2 emission and convert CO2 into biomass abundant in carbohydrates, and thus appear as emerging third-generation feedstock for fermentation. In this study, an isolated microalga Chlorella vulgaris was cultivated photoautotrophically and the biomass was then harvested for the use in butanol fermentation with a Clostridium acetobutylicum strain via acetone-butanol-ethanol (ABE) fermentation. The results show that 3.37 g L-1 of butanol was produced from 111g of acid-pretreated biomass of C. vulgaris. This demonstrates the potential of using microalgal feedstock for fermentative butanol production. The results also suggest that to improve hydrolysis efficiency of C. vulgaris, higher concentration of sulfuric acid (>2%) should be used.

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