Glucose fermentation kinetics, 379

Walling, E., M. Dols-Lafargue, and A. Lonvaud-Funel. 2005. Glucose fermentation kinetics and exopolysaccharide production hy ropy Pediococcus damnosus IOEB8801. Food Microbiol 22 71-78. 

The growth of immobilized cells ceased once the nitrogen source was exhausted, as reported by Nava et al. (17) (Fig. 3). After that, immobilized cells were released from the immobilization support and became free cells. Gibberellic acid production (0.160 g/L) was effective once the ammonia was exhausted, and it continued until total glucose consumption. In the case of immobilized cells cultured in a stirred reactor, Fig. 4 shows the fermentation kinetics. One can observe some differences related to the immobilized biomass production, and the uptake in nitrogen and carbon sources. However,... 

While the Monod equation is an oversimplification of the complicated mechanism of cell growth, it often adequately describes fermentation kinetics. The Monod kinetic parameters can be determined by making a series of ideal continuous stirred-tank bioreactors, which will be discussed later. Table 19.6 shows the typical values of the Monod s kinetic parameters when glucose is a limiting substrate. 

Krishnan, M.S. Ho, N.W.Y. Tsa, G.T. (1999) Fermentation kinetics of ethanol production from glucose and xylose by recombinant Saccharomyces 1400 (pLNH33). Appl. Biochem. BiotechnoL, 78, 373-388. 

A feed concentration of 15 g glucose and 15 g xylose per litre was used over a feed rate of 20-200 ml/hr. Samples were taken at successive points along the reactor length, and the usual analysis for glucose and xylose consumption, organic acid production and cell density were done. A kinetic model for the growth and fermentation of P. acidipropionici was obtained from these data. 

You are going to cultivate yeast, Saccharomyces cerevisiae, by using a 10 m -fermenter your company already owns. You want to find out the amount of ethanol the fermenter can produce. Therefore, a chemostat study was carried out and the Monod kinetic parameters for the microorganism grown in the glucose medium at 30°C, pH 4.8, were found to be Ks = 0.0025 g/L and /imax = 0.25 h-1. The ethanol yield (YP/S) is 0.44 (g/g) and cell yield (Yx/S) is 0.019 (g/g). The inlet substrate concentration is 50 g/L-... 

Fig. 2. Kinetics of continuous ABE fermentation at various dilution rates and pH 4.3. Glucose and OD are on the right axis acetone, butanol, ethanol, acetate, and butyrate are on the left axis. (A) Reactor L (B) reactor R.

TABLE 12.5 Comparison of Kinetic Constants of Mesophilic Acidogenic Fermentation of Glucose, Cellulose, and Activated Biosolids and Mesophilic Methanogenic Fermentation of Acetic Acid ... 

Bizukojc, M. and Ledakowicz, S. 2004. The kinetics of simultaneous glucose and fructose uptake and product formation by Aspergillus niger in citric acid fermentation. Process Biochemistry 39 2261-2268. 

Abstract A commercial strain of Saccharomyces cerevisiae was used for the production of ethanol by fermentation of cashew apple juice. Growth kinetics and ethanol productivity were calculated for batch fermentation with different initial sugar (glucose + fructose) concentrations. Maximal ethanol, cell, and glycerol concentrations were obtained when... 

Figure 2. Fermentation on glucose as carbon source and production of P(3HB-co-3H V) with sodium valerate as precursor and Pseudomonas cepacia ATCC 17759, development of kinetic data...

Table I. Kinetic data calculated from the fermentation on glucose as carbon source...

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