Conditions that Promote Production of Lactic Acid by Zymomonas mobilis in Batch and Continuous Culture

1998 ◽  
pp. 173-185
Author(s):  
Hugh G. Lawford ◽  
Joyce D. Rousseau
Keyword(s):  
Lactic Acid ◽  
Continuous Culture ◽  
Zymomonas Mobilis

Enzymes of the Entner-Doudoroff and pyruvate decarboxylation pathways in Zymomonas mobilis wild-type CP4 and mutant strains grown in continuous culture

2001 ◽  
Vol 80 (3) ◽  
pp. 287-295
Author(s):  
Alexander L. Sawides ◽  
Kalliopi I. Kalliopi ◽  
milton A. Typas ◽  
Amalia D. Karagouni
Keyword(s):  
Continuous Culture ◽  
Zymomonas Mobilis ◽  
Wild Type ◽  
Mutant Strains

Kinetic analysis of batch and continuous culture of Streptococcus cremoris HP

1978 ◽  
Vol 24 (4) ◽  
pp. 372-380 ◽  
Author(s):  
P. L. Rogers ◽  
L. Bramall ◽  
I. J. McDonald
Keyword(s):  
Lactic Acid ◽  
Steady State ◽  
Kinetic Analysis ◽  
Continuous Culture ◽  
Batch Culture ◽  
Lactic Acid Production ◽  
Streptococcus Cremoris ◽  
Lactose Utilization ◽  
State Growth ◽  
Batch Data

The growth of Streptococcus cremoris on a semidefined medium was studied at initial lactose concentrations of 0.2–5.0% in batch culture, and in lactose-limited chemostat cultures at 0.5% lactose. Kinetic analysis of the batch data, using statistical techniques, indicated the importance of lactose limitation and lactic acid inhibition of the growth of S. cremoris. A model for the biomass production, lactose utilization, and lactic acid production in batch culture was proposed. In continuous culture, it was found that steady state populations were maintained at higher dilution rates (D = 0.6–0.7 h−1) than the maximum predicted by batch culture (0.56 h−1). No evidence for a selection of fast-growing mutants was obtained. Copious growth adhering to the walls of the fermentor (i.e. wall growth) occurred very rapidly at higher dilution rates and this undoubtedly affected steady-state growth and wash-out and, as a consequence, the apparent maximum dilution rate.

Stability of a lac operon in Zymomonas mobilis in batch and continuous culture

1986 ◽  
Vol 3 (4) ◽  
pp. 197-205 ◽  
Author(s):  
Aneta T. Strzelecki ◽  
Amanda E. Goodman ◽  
Peter L. Rogers
Keyword(s):  
Continuous Culture ◽  
Zymomonas Mobilis ◽  
Lac Operon

Use of continuous culture for internal pH determination of lactic acid bacteria

1991 ◽  
Vol 8 (2) ◽  
pp. 137-142 ◽  
Author(s):  
L.C. McDonald ◽  
H.M. Hassan ◽  
H.P. Fleming ◽  
M.A. Daeschel
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Continuous Culture ◽  
Internal Ph

Two-reactor, continuous culture fermentation for fuel ethanol production from lignocellulosic acid hydrolysate using Zymomonas mobilis and Scheffersomyces stipitis

RSC Advances ◽  
2014 ◽  
Vol 4 (69) ◽  
pp. 36412-36418 ◽  
Author(s):  
Gaurav Chaudhary ◽  
Sanjoy Ghosh
Keyword(s):  
Ethanol Production ◽  
Continuous Culture ◽  
Zymomonas Mobilis ◽  
Fuel Ethanol ◽  
Ethanol Productivity ◽  
Scheffersomyces Stipitis ◽  
Acid Hydrolysate

Multistage ethanol production from lignocellulosic acid hydrolysate using two different microorganisms in two reactors enhances the utilization of all sugars (pentose and hexose), with higher ethanol productivity.

Lactic acid production in a cell retention continuous culture using lignocellulosic hydrolysate as a substrate

1997 ◽  
Vol 56 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Karel Melzoch ◽  
Jaroslav Votruba ◽  
Věra Hábová ◽  
Mojmı́r Rychtera
Keyword(s):  
Lactic Acid ◽  
Continuous Culture ◽  
Acid Production ◽  
Lactic Acid Production ◽  
Lignocellulosic Hydrolysate ◽  
Cell Retention ◽  
A Cell

Probiotic control of lactate accumulation in acutely grain-fed sheep

1995 ◽  
Vol 46 (8) ◽  
pp. 1555 ◽  
Author(s):  
KG Wiryawan ◽  
JD Brooker
Keyword(s):  
Lactic Acid ◽  
Continuous Culture ◽  
Clinical Symptoms ◽  
Lactate Accumulation ◽  
Ruminal Ph ◽  
Selenomonas Ruminantium ◽  
Culture Model ◽  
Probiotic Treatment ◽  
Megasphaera Elsdenii

When sheep were acutely fed a grain diet, ruminal pH rapidly dropped to less than 5.0, lactic acid exceeded 100 mM and clinical symptoms of acidosis were evident within 24 h. When acute grain feeding was preceeded by inoculation of the rumen with 108 cfu of Selenomonas ruminantium subsp. lactilytica strain JDB201, ruminal lactate was undetectable and ruminal pH was stabilized at 6.3-6.5 for up to 24 h. Inoculation of the rumen with a mixture of 108 cfu each of Selenomonas ruminantium subsp. lactilytica strain JDB201 and Megasphaera elsdenii strain JDB301 was shown to be more effective than Selenomonas ruminantium subsp. lactilytica alone and maintained ruminal stability following acute grain feeding for up to 4 days. A continuous culture model of acidosis was also developed to test the effect of probiotic inoculation in combination with 0.75 8g/mL of Virginiamycin in preventing lactate accumulation and establishing a stable fermentation in vitro. The data suggest that although probiotic treatment is effective, a combination of probiotic and antibiotic may be the best approach to achieve rapid ruminal adaptation during acute grain feeding of sheep.

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