Experience with solvent production by clostridium beijerinckii in continuous culture

Jöbses, I. M. L.; Roels, J. A.

doi:10.1002/bit.260250426

Cited by 39 publications

(19 citation statements)

References 14 publications

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“…This is then superseded by the solventogenic phase during which the acids are reabsorbed and organic solvents produced at a slow growth as the medium pH increases. ABE fermentations are generally controlled within the pH range of 4e5 because a low medium pH has been implicated as an essential requirement for good solvent production [1e3, 8,10,11]. pH-controlled fermentation between 4.9 and 5.0 in sludge hydrolysate medium, however, resulted in the production of acids [9].…”

Section: Effect Of Medium Phmentioning

confidence: 99%

Bioconversion of industrial wastewater from palm oil processing to butanol by Clostridium saccharoperbutylacetonicum N1-4 (ATCC 13564)

Hipólito

Crabbe

Badillo

et al. 2008

Journal of Cleaner Production

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Section: Effect Of Medium Phmentioning

confidence: 99%

Bioconversion of industrial wastewater from palm oil processing to butanol by Clostridium saccharoperbutylacetonicum N1-4 (ATCC 13564)

Hipólito

Crabbe

Badillo

et al. 2008

Journal of Cleaner Production

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“…Solventogenesis, which may be regarded as a neutralization Biotechnolog y process, is triggered by decreased environmental pH134 and/or failure of the acetate pathway to provide sufficient energy for growth. 135 The major products are neutral alcohols and ketones, and the principal regulatory mechanisms are biosynthetic (ATP) and reduction (NADH,, FADH,) energy availability/demand,136 and acid toxocity. 135 The interactions between acidogenic and solventogenic species often result in two distinct sequential stages in batch anaerobic fermentations.…”

Section: Ph Changesmentioning

confidence: 99%

Control/Promotion of the Refuse Methanogenic Fermentation

Senior

Watson-Craik

Kasali³

1990

Critical Reviews in Biotechnology

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Although practiced for more than 7 millennia, the landfill disposal of refuse has, as yet, with few exceptions, been merely regarded as a low-cost disposal option and its exploitation potential has been largely ignored. Today, however, a number of possibilities are under consideration including the production of energy, chemical feedstock, value-added chemicals, carbon dioxide and protein; the use of refuse as an anaerobic filter for the co-disposal of industrial wastewater and sludge; and the restoration of impoverished soils by fresh or composted refuse addition. Development of these technologies, however, necessitates a comprehensive understanding of the fundamental microbiology and biochemistry of refuse catabolism. Existing fundamental knowledge underpinning these technologies will be considered in a series of review articles. In the first, control/exploitation of the solid-state refuse methanogenic fermentation is examined with specific reference to the effects of first-tier variable manipulations.

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“…Most of these investigations dealt with optimization of the conditions controlling metabolism oriented towards acidogenesis or solventogenesis (Andersch et al 1982;Terracciano and Kashket 1986;Monot et al 1983;Roos et al 1985;Jobses and Roels 1983;Gottwald and Gottschalk 1985) and the study of inhibition caused by organic acids and butanol (Costa and Moreira 1983;Bowles and Ellfson 1985;Huang et al 1985) and by autobacteriocins (Barber et al 1979;Soucaille and G o m a 1986).…”

Section: Introductionmentioning

confidence: 99%

Inactivation of lytic enzymes by heat treatment in ultrafiltration-coupled acetonobutylic fermentation

Minier

Soucaille

Blanc-Ferras

et al. 1990

Appl Microbiol Biotechnol

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Clostridium acetobutylicum cultures were grown in batch mode, using mineral ultrafiltration membranes to confine the microbial cells in the fermentot while the permeate was subject to heat treatment (70°C for 20 min) before recycling. The extracellular lytic activity in the broth, measured by the initial rate of lysis of a buffered suspension of Clostridium cell walls, was strongly decreased by a factor of 6.7 at p H 5.5, and 3.9 at p H 4.8. This caused an enhancement of the growth rate during the course of fermentation and an increase in the maximal cell concentration, which was practically doubled in heat-treatment assays. The solvent production results obtained were less positive in terms of productivity and final butanol concentration, since there was no significant improvement, despite elimination of lytic enzyme inhibition. The heat-inactivation of lytic enzymes influenced the culture more than the suppression of product inhibition, particularly concerning the activity and orientation of this bacterial metabolism.

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Experience with solvent production by clostridium beijerinckii in continuous culture

Cited by 39 publications

References 14 publications

Bioconversion of industrial wastewater from palm oil processing to butanol by Clostridium saccharoperbutylacetonicum N1-4 (ATCC 13564)

Bioconversion of industrial wastewater from palm oil processing to butanol by Clostridium saccharoperbutylacetonicum N1-4 (ATCC 13564)

Control/Promotion of the Refuse Methanogenic Fermentation

Inactivation of lytic enzymes by heat treatment in ultrafiltration-coupled acetonobutylic fermentation

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