A Comprehensive Kinetic Model for Chlorine Decay and Chlorination By-Product Formation

2000 ◽  
pp. 223-246 ◽  
Author(s):  
John N. McClellan ◽  
David A. Reckhow ◽  
John E. Tobiason ◽  
James K. Edzwald ◽  
Darrell B. Smith
Keyword(s):  
Kinetic Model ◽  
Product Formation ◽  
Chlorine Decay

The Study of the Kinetic Model of Halomonas Salina Fermenting Ectoine

2013 ◽  
Vol 781-784 ◽  
pp. 647-652
Author(s):  
Shuang Gao ◽  
Ling Hua Zhang ◽  
Qing Chen ◽  
Lin Bai ◽  
Ya Jun Lang
Keyword(s):  
Cell Growth ◽  
Kinetic Model ◽  
Monosodium Glutamate ◽  
Biomass Concentration ◽  
Correlation Coefficients ◽  
Kinetic Mechanism ◽  
Product Formation ◽  
Substrate Consumption ◽  
Nonlinear Fitting ◽  
Potential Applications

Ectoine had important physiological functions and superior potential applications, so the study of ectoine was extensively attented. This article was related to kinetic models of cell growth, product formation and substrate consumption, which was not only established according to the characteristics of ectoine batch fermentation by Halomonas salina DSM 5928 but also obtained the kinetic parameters by the nonlinear fitting method in the Microcal Origin software. Logistic, Luedeking-Piret and Luedeking-Piret-like equations was applied to analyze the cell growth, the ectoine formation and the substrate consumption by the kinetic model，respectively. The results between calculated values and experimental data were coincident. By fitting, correlation coefficients R2 were ≥ 0.989. The fermentation conditions of ectoine were analyzed according to the model. The results showed that ectoine productivity (0.28 g/L/h) was the highest when initial monosodium glutamate concentration (S0) was 60 g/L. However, when S0 was 80 g/L, the ectoine concentration was maximal, i.e., 7.59 g/L. The research suggested that ectoine formation belonged to the mixed kinetic mechanism of cell growth and biomass concentration, while the ectoine production mainly depended on instantaneous biomass concentration. The fermentation method for improving ectoine concentration was further proved. The established kinetic model will be of significant value to provide the optimal conditions of present process.

Kinetic Modeling and Sensitivity Analysis of Kinetic Parameters for L-Glutamic Acid Production Using Corynebacterium glutamicum

2009 ◽  
Vol 7 (1) ◽  
Author(s):  
S. Suresh ◽  
Noor Salam Khan ◽  
Vimal Chandra Srivastava ◽  
Indra Mani Mishra
Keyword(s):  
Experimental Data ◽  
Sensitivity Analysis ◽  
Kinetic Model ◽  
Glutamic Acid ◽  
Corynebacterium Glutamicum ◽  
Negative Impact ◽  
Product Formation ◽  
Biochemical Engineering ◽  
Glutamic Acid Production ◽  
Engineering Journal

In the present work, a kinetic model has been developed for the batch fermentation of glucose for the production of L-glutamic acid (LGA) by Corynebacterium glutamicum. Parameters of the kinetic model have been determined by using the experimental data available in literature and the results have been compared by carrying out computer simulation. The kinetic model proposed in the present study provides better predictions for the growth of biomass, substrate consumption and LGA production as compared to the prediction reported by Bona and Moser (Bioprocess Engineering 17(2) (1997b) 121-125). The present model also fits the experimental data given by Zhang et al. (Enzyme and Microbial Technology, 22, 205-209, 1998) and Khan et al. (Biochemical Engineering Journal, 25, 173–178, 2005), respectively. Sensitivity analysis was carried out to assess the validity of the developed model, and to reveal the kinetic parameter that has maximum impact on LGA production. It is found that an increase in the non-growth associated product formation coefficient caused highest negative impact on LGA production.

A kinetic model for product formation in unstable recombinant populations

1985 ◽  
Vol 27 (12) ◽  
pp. 1699-1709 ◽  
Author(s):  
Sun Bok Lee ◽  
Alex Seressiotis ◽  
James E. Bailey
Keyword(s):  
Kinetic Model ◽  
Product Formation

scholarly journals Development of a Site-Specific Kinetic Model for Chlorine Decay and the Formation of Chlorination By-Products in Seawater

2015 ◽  
Vol 3 (3) ◽  
pp. 772-792 ◽  
Author(s):  
Suhur Saeed ◽  
Shwet Prakash ◽  
Nandita Deb ◽  
Ross Campbell ◽  
Venkat Kolluru ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Site Specific ◽  
Chlorine Decay ◽  
A Site ◽  
By Products

Monochloramine and total haloamine decay after a short prechlorination time in the presence of bromide

2010 ◽  
Vol 10 (4) ◽  
pp. 512-516
Author(s):  
A. Alsulaili ◽  
G. E. Speitel ◽  
L. E. Katz
Keyword(s):  
Kinetic Model ◽  
Product Formation ◽  
Chemical Kinetic ◽  
Operating Conditions ◽  
Strategy Formation ◽  
Chemical Kinetic Model ◽  
Over Time

The Chlorine-Ammonia Process was developed recently as a preoxidation process to minimize the formation of bromate during ozonation of the waters containing a significant bromide concentration. Chlorine is added first followed by ammonia 5–10 minutes later, with the goal of sequestering bromide in monobromamine during the subsequent ozonation step. The goal of this research was to improve the Chlorine-Ammonia Process by introducing a very short prechlorination step (i.e. 30 seconds before addition of ammonia) to minimize overall disinfection by-product formation. Also, in this strategy, formation of a powerful halogenating agent, HOBr, is minimized and bromochloramine (NHClBr) is used predominantly instead of monobromamine to sequester bromide during ozonation. To support this improved approach to bromide sequestration, this study examined the formation and decay of bromochloramine as a function of operating conditions, such as pH and Cl2:N ratio, and refined a chemical kinetic model to predict haloamine concentrations over time.

Further Studies of the Kinetics of Oxygenation of Arachidonic Acid by Soybean Lipoxygenase

1975 ◽  
Vol 53 (11) ◽  
pp. 1220-1231 ◽  
Author(s):  
H. W. Cook ◽  
W. E. M. Lands
Keyword(s):  
Experimental Data ◽  
Arachidonic Acid ◽  
Kinetic Model ◽  
Theoretical Data ◽  
Product Formation ◽  
Soybean Lipoxygenase ◽  
Product Removal ◽  
Velocity Changes ◽  
Extensive Experimental Data ◽  
Kinetics Of

A kinetic model for soybean lipoxygenase (EC 1.13.11.12) has been examined by comparing results from extensive experimental data with theoretical data generated from a computer program. Kinetic constants have been established by closely fitting experimental and computer-generated data with both product formation versus time, and the more complex accelerative and decelerative relationships of velocity changes with time.It has been confirmed that activation of lipoxygenase by its hydroperoxide product is necessary for activity, and product removal gives inhibition in a manner quantitatively predicted by the model. The earliest accurate measurement of velocity (at 9 s) is a convenient index of the amount of product–activator present in reaction mixtures, and can be used to assay quantitatively the amount of product–activator.The results confirm that soybean lipoxygenase catalyzes a product-activated, substrate-inhibited oxygenation accompanied by a self-catalyzed destruction of its activity.

A 9-pool metabolic structured kinetic model describing days to seconds dynamics of growth and product formation byPenicillium chrysogenum

2017 ◽  
Vol 114 (8) ◽  
pp. 1733-1743 ◽  
Author(s):  
Wenjun Tang ◽  
Amit T. Deshmukh ◽  
Cees Haringa ◽  
Guan Wang ◽  
Walter van Gulik ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Product Formation ◽  
Structured Kinetic Model
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