Lactiplantibacillus plantarum is a Gram-positive bacterium that belongs to the lactic acid bacteria (LAB) group commonly used in food industry. To use this microorganism, high biomass concentration necessary, and models need be established for predicting improving its behavior along fermentation. However, current L. are applicable only one substrate. The growth of newly isolated strain 60-1 co-...

There is an increasing interest in improving biological processes, including fermentation conditions difficult, as it requires the use of appropriate improvement method that allows operating fermenter under optimal order to obtain largest possible amount final product. The aim this work was succeed examples produce quantity dry yeast biomass Saccharomyces cerevisiae using grape juice sole carbo...

The development of optimal bacterial strains for industrial scale of fermentation would benefit from a quantitative model of rate of gene expression from DNA to RNA, from DNA to protein, and ultimately from DNA to the metabolites. In this study, we developed such a model for phenazine-1-carboxylic acid (PCA) biosynthesis in Pseudomonas sp. strain M18G. The PCA biosynthesis is controlled by anop...

This work aims to study the production of the biomass of S. cerevisiae on an optimized medium using date extract as the only carbon source in order to obtain a good yield of the biomass. The biomass production was carried out according to the central composite experimental design (CCD) as a response surface methodology using Minitab 16 software. Indeed, under optimal biomass production conditio...

A mathematical model was developed to describe batch and continuous fermentation of glucose to organic acids with Clostridium tyrobutyricum. A modified Monod equation was used to describe cell growth, and a Luedeking-Piret equation was used to describe the production of butyric and acetic acids. Using the batch fermentation equations, models predicting butyric acid selectivity for continuous fe...

In this study, the behaviour of a continuous membrane bioreactor with in situ removal of product ethanol by pervaporation and cell recycle has been investigated. The kinetic model used is an unstructured growth model taking into account product as well as substrate inhibition and the product formation rate is represented by the Leudeking-Piret model. The effect of pervaporation on the performan...

Tannase (tannin acyl hydrolase, E.C.3.1.1.20) is an important hydrolysable enzyme with innumerable applications and industrial potential. In the present study, a kinetic model has been developed for the batch fermentation used for the production of tannase by A.flavus MTCC 3783. Maximum tannase activity of 143.30 U/ml was obtained at 96 hours under optimum operating conditions at 35oC, an initi...

Studies on Simultaneous Saccharification and Fermentation (SSF) of corn flour, a major agricultural product as the substrate using starch digesting glucoamylase enzyme derived from Aspergillus niger and non starch digesting and sugar fermenting Saccharomyces cerevisiae in a batch fermentation. Experiments based on Central Composite Design (CCD) were conducted to study the effect of substrate co...