Metabolic response of Bacillus sphaericus 1593M for dual-substrate limitation in continuous and total-cell-retention cultures

1997 ◽  
Vol 47 (5) ◽  
pp. 554-559 ◽  
Author(s):  
S. Meenakshisundaram ◽  
G. Suresh ◽  
R. K. Fernando ◽  
K. Jenny ◽  
R. Sachidanandham ◽  
...  
Keyword(s):  
Metabolic Response ◽  
Bacillus Sphaericus ◽  
Total Cell ◽  
Cell Retention ◽  
Substrate Limitation ◽  
Dual Substrate Limitation ◽  
Dual Substrate

Dual substrate limitation modeling and implications for mainstream deammonification

2017 ◽  
Vol 116 ◽  
pp. 95-105 ◽  
Author(s):  
Heather A. Stewart ◽  
Ahmed Al-Omari ◽  
Charles Bott ◽  
Haydee De Clippeleir ◽  
Chunyang Su ◽  
...  
Keyword(s):  
Substrate Limitation ◽  
Dual Substrate Limitation ◽  
Dual Substrate

Partial and total cell retention in a filtration-based homogeneous perfusion reactor

1995 ◽  
Vol 11 (5) ◽  
pp. 584-588 ◽  
Author(s):  
Gautam G. Banik ◽  
Carole A. Heath
Keyword(s):  
Total Cell ◽  
Cell Retention

Continuous ethanol production from wood hydrolysate by chemostat and total cell retention culture

1996 ◽  
Vol 13 (5) ◽  
pp. 453-456 ◽  
Author(s):  
Woo Gi Lee ◽  
Jin Suk Lee ◽  
Byung Geon Park ◽  
Mi Sun Kim ◽  
Soon Chul Park ◽  
...  
Keyword(s):  
Ethanol Production ◽  
Total Cell ◽  
Cell Retention ◽  
Wood Hydrolysate

Improved Production of Bacillus thuringiensis by Intermittent Fed-Batch Culture with Total Cell Retention

2010 ◽  
Vol 8 (1) ◽  
Author(s):  
Edwin Habeych ◽  
Andrés F González Barrios ◽  
Alexandre Restrepo-Boland ◽  
Sergio Orduz
Keyword(s):  
Bacillus Thuringiensis ◽  
Batch Culture ◽  
Spodoptera Frugiperda ◽  
Total Cell ◽  
Spore Concentration ◽  
Fed Batch ◽  
Cell Retention ◽  
Filtration System ◽  
Fed Batch Culture ◽  
Flow Filtration

Intermittent fed-batch culture with total cell retention was evaluated during Bacillus thuringiensis serovar. kurstaki fermentations aiming to enhance biomass and spore concentration yields while maintaining toxicity. This method is derived from the already reported intermittent fed-batch culture and utilized a tangential flow filtration system for cell retention. After 4 pulses, we obtained a biomass of 74.36 g·L-1 and this biomass displayed a half lethal concentration towards neonate Spodoptera frugiperda larvae of 40.53 ng·cm-2, and spore concentration of 4.6 x 1014 CFU mL-1. On the other hand, volumetric productivity was increased seven-fold compared to batch fermentation. Interestingly, we are not aware of higher spore concentrations reported to date for B. thuringiensis cultures.

scholarly journals Impact of Dual Substrate Limitation on Biodenitrification Modeling in Porous Media

Processes ◽  
2020 ◽  
Vol 8 (8) ◽  
pp. 890
Author(s):  
Mostafa Abaali ◽  
Jérôme Harmand ◽  
Zoubida Mghazli
Keyword(s):  
A Priori ◽  
Growth Function ◽  
Single Type ◽  
A Priori Error Estimate ◽  
Single Substrate ◽  
Spatially Distributed ◽  
Dual Substrate Limitation ◽  
Diffusion Convection ◽  
Reaction Equations ◽  
Dual Substrate

In this work, we consider a model of the biodenitrification process taking place in a spatially-distributed bioreactor, and we take into account the limitation of the kinetics by both the carbon source and the oxidized nitrogen. This model concerns a single type of bacteria growing on nitrate, which splits into adherent bacteria or free bacteria in the liquid, taking all interactions into account. The system obtained consists of four diffusion-convection-reaction equations for which we show the existence and uniqueness of a global solution. The system is approximated by a standard finite element method that satisfies an optimal a priori error estimate. We compare the results obtained for three forms of the growth function: single substrate limiting, “multiplicative” form, and “minimum” form. We highlight the limitation of the ‘ single substrate limiting model”, where the dependency of the bacterial growth on the nitrate is neglected, and find that the “minimum” model gives numerical results closer to the experimental results.

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