Butyl Alcohol from Xylose Saccharification Liquors from Corncobs

Langlykke, A. F.; Lanen, J. M. Van; Fraser, David R.

doi:10.1021/ie50465a025

Cited by 28 publications

(10 citation statements)

References 5 publications

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“…Prospects of utilization of hydolyzates for ABE fermentation have been investigated for more than half a century. Earliest studies in this area include those of Waksman and Kirsh [124], Underkofler et al [125], Sjolander et al [126], Leonard et al [127], Langlykke et al [128], and Nakhmanovich and Shcheblykina [20].…”

Section: Substrates For Acetone-butanol-ethanol Fermentationmentioning

confidence: 99%

Biobutanol: science, engineering, and economics

Ranjan

Moholkar

2011

Int. J. Energy Res.

151

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SUMMARYAmong several liquid alternative fuels, biobutanol has shown great promise because of its very similar properties to gasoline. This review provides an overview of research activities in acetone-butanol-ethanol (ABE) fermentation over the past two and a half decades. We have addressed seven important facets of ABE fermentation, viz. biochemistry, microbial cultures, alternative substrates, solvent recovery, fermentation mode and reactor designs, mathematical modeling, and economics. Development of mutant strains having higher yield, selectivity and tolerance to inhibition, and search for cheap alternative substrates for fermentation are most important thrust areas in biobutanol production. New and efficient processes have been developed for in situ removal and recovery of the ABE solvents. Several rigorous kinetic and physiological models for fermentation have been formulated, which form useful tool for optimization of the process. These research activities have been reviewed in this paper. Finally, we have summarized studies on the economic viability of large-scale ABE fermentation processes employing various process designs, substrates, and microbial cultures. With the use of new strains, inexpensive substrates, and superior reactor designs, economic potential of ABE fermentation has been found to be highly attractive. Research efforts in science, engineering, and economics of ABE fermentation have brought biobutanol close to commercialization as liquid alternate fuel.

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Section: Substrates For Acetone-butanol-ethanol Fermentationmentioning

confidence: 99%

Biobutanol: science, engineering, and economics

Ranjan

Moholkar

2011

Int. J. Energy Res.

151

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“…Hydrolysates. Initial studies (131,137,190,233,252,266) suggested that acid hydrolysis of cellulosic material from a variety of sources offered possibilities as a substrate for AB fermentation, and more recently Saddler and his co-workers have investigated the production and utilization of wood cellulose and hemicellulose hydrolysates (226,290,291,293). Steam-exploded wood chips were extracted with water, and over 75% of the hemicellulose was shown to be present in the water-soluble fraction, leaving a celluloserich, water-insoluble substrate which could be readily hydrolyzed to glucose.…”

Section: Substrates Derived From Lignocellulosementioning

confidence: 99%

Acetone-butanol fermentation revisited.

Jones¹,

Woods²

1986

Microbiological Reviews

1,272

689

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“…The solventproducing strains of Clostridium sp. are capable of fermenting a wide variety of carbohydrates, including hexoses (6) and pentoses (9,14,19). The potential of these strains for the industrial production of acetone, n-butanol, and ethanol would be greatly enhanced if they were able to hydrolyze cellulose.…”

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confidence: 99%

Cellulolytic Activity of Clostridium acetobutylicum

Lee

Forsberg

Gibbins

1985

Appl Environ Microbiol

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Clostridium acetobutylicum NRRL B527 and ATCC 824 exhibited extracellular and cell-bound endoglucanase and cellobiase activities during growth in a chemically defined medium with cellobiose as the sole source of carbohydrate. For both strains, the endoglucanase was found to be mainly extracellular (70 to 90%) during growth in continuous or batch cultures with the pH maintained at 5.2, whereas the cellobiase was mainly cell associated (60 to 90%). During continuous cultivation of strain B527 with cellobiose as the limiting nutrient, maximum production of the endoglucanase and cellobiase occurred at pH values of 5.2 and 4.8, respectively. In the carbon-limited continuous cultures, strain 824 produced similar levels of endoglucanase, cellobiosidase, and cellobiase activities regardless of the carbon source used. However, in ammoniumor phosphate-limited cultures, with an excess of glucose, only 1/10 of the endoglucanase was produced, and neither cellobiosidase nor cellobiase activities were detectable. A crude extracellular enzyme preparation from strain B527 hydrolyzed carboxymethylcellulose and phosphoric acid-swollen cellulose readily and microcrystalline cellulose (Avicel) to a lesser extent. Glucose accounted for more than 90% of the reducing sugar produced by the hydrolysis of acid-swollen cellulose and Avicel. Strain B527 did not grow in medium with acid-swollen cellulose as the sole source of carbohydrate, although it grew readily on the products obtained by hydrolyzing the cellulose in vitro with a preparation of extracellular cellulase derived from the same organism.

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Butyl Alcohol from Xylose Saccharification Liquors from Corncobs

Cited by 28 publications

References 5 publications

Biobutanol: science, engineering, and economics

Biobutanol: science, engineering, and economics

Acetone-butanol fermentation revisited.

Cellulolytic Activity of Clostridium acetobutylicum

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