Kinetic modeling of the simultaneous production of ethanol and fructose by Saccharomyces cerevisiae

Sulieman, A. K.; Putra, Meilana Dharma; Abasaeed, Ahmed E.; Gaily, Mohamed H.; Al‐Zahrani, Saeed M.; Zeinelabdeen, Mohamed A.

doi:10.1016/j.ejbt.2018.04.006

Cited by 18 publications

(4 citation statements)

References 34 publications

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“…This also indicates that the optimum time for growth is on day 5 which is marked at peak conditions. The significant drop in cell mass observed was due to the inhibition phenomenon [14]. Unlike the case with microalgal growth conditions in variations 2 and 3, microalgae did not experience a significant increase in growth as previously described.…”

Section: Resultssupporting

confidence: 63%

Effect of Nutrition on Microalgal Growth and Pollutant Decrease in Contaminated River

Nisa,

Ramadani,

Dewangi

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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Microalgae have the ability to remove nutrients, heavy metals, and pollutants in the form of organic substances. Thus, it is expected that the use of microalgae can reduce pollutant levels in contaminated rivers. This study aims to reduce the concentration of pollutants in the Martapura river contaminated with industrial waste by utilizing microalgae. The maximum microalgal growth was obtained on day 4 with a nutritional variation of 5.25 mL as the concentration was 0.0115 g/L. The decrease in the level of pollutants occurred during the treatment with a decrease in sulfate levels from 18.9 mg/L to 11 mg/L. The amount of cadmium decreased from 0.0014 mg/L to an undetectable point. On the other hand, the iron content dropped quite drastically from 1.8 mg /L to 0.8 mg/L.

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Section: Resultssupporting

confidence: 63%

Effect of Nutrition on Microalgal Growth and Pollutant Decrease in Contaminated River

Nisa,

Ramadani,

Dewangi

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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“…After that, the growth becomes linear during the 12 h of the fermentative process, which indicates the presence of residual glucose. Another possible factor for the reducing of cellular growth is the production of ethanol, as observed by Sulieman et al (2018) in the fermentation of S. cerevisae. Ribéreau- Gayon and Peynaud (1996) reported that the pH may possibly decrease due to the formation of organic acids (succinic, lactic, acetic and other acids) with a consequent increase of the acidity of the fermentation media.…”

Section: Discussionmentioning

confidence: 99%

Production of functional beer with the addition of probiotic: Saccharomyces boulardii

Reitenbach¹,

Iwassa

Barros

2021

RSD

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Industries have been investing in the development of functional products, such as the ones produced with probiotic microorganisms. The aim of this study was to develop a Pilsen-style beer with functional properties through the addition of the Saccharomyces boulardii probiotic. The beer was fermented with low-fermentation commercial yeast. The probiotic culture was added next, evaluating its probiotic potential. Microbiological, sensorial and physicochemical aspects were evaluated in the obtained products. The S. boulardii strain presented probiotic viability after the confirmation of the resistance to acid, bile salts and ethyl alcohol tests, maintaining superior levels of colony-forming to the indicated by the legislation during the 28 days storage. The beer with probiotic addition has not differed sensorially from the commercial beer concerning the aroma, flavor, general appearance and color. The results of sensorial, physicochemical and microbiological analysis showed the viability of the production of probiotic beer with the addition of S. boulardii.

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“…The MGM, on the other hand, could fit all three response data more adequately with minimal MSE of 0.26. Kinetics of bioconversion experiments such as this have earlier been successfully modeled by the MGM (Tjørve and Tjørve 2017;Sulieman et al 2018;Boshagh and Rostami 2021) and is also recommended in this report.…”

Section: Discussionmentioning

confidence: 99%

“…Very frequently in microbial bioconversions, the transforming microorganism uses the substrate as carbon or energy source, thus making determinations of such parameters as length of lag phase, maximum specific growth rate, volumetric and/or specific productivities sacrosanct. The Monod, Logistic, modified Gompertz and Luedeking-Piret models are a few of the models that have been developed to tackle environmental and industrial bioconversion kinetic problems (Mercier et al 1992;Tjørve and Tjørve 2017;Sulieman et al 2018).…”

Section: Introductionmentioning

confidence: 99%

A Novel Strain of Stenotrophomonas Acidaminiphila Produces Super-active Alkaline Protease During Cassava Effluent Fermentation: Process Optimization, Kinetic Modeling and Scale-up

Asitok

Ekpenyong

Takon

et al. 2021

Preprint

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PurposeMicrobial fermentations for value-added metabolites production are exploited for efficient bioconversion of agro-industrial wastes for the dual purposes of pollution abatement and cost-effectiveness.MethodsIn the present study, the regular 2-level factorial design was employed to screen fermentation parameters that enhance production of a novel alkaline protease by a strain of Stenotrophomonas acidaminiphila using cassava processing effluent as substrate. Data from randomized experiments of central composite rotatable design for improved enzyme activity, guided by path of steepest ascent experiments, were modeled and optimized by response surface methodology (RSM). Shake flask kinetics of production under optimized conditions was modeled by logistic and modified Gompertz models and determinations of maximum specific growth rate, µmax, maximum volumetric rate of substrate consumption, rsm, maximum volumetric rate of biomass formation, rxm and specific yield of product, Yp/x were made.ResultsLogistic model poorly fitted RSM-generated product formation and substrate consumption data. However, biomass formation was accurately fitted (adjusted r2 >99%), with µmax of 0.471 h-1. The modified Gompertz model, on the contrary, more accurately fitted all three major response data with minimal mean squared error. Potential for scale-up of bioprocess evaluated in 5-L bioreactor satisfactorily revealed 8.5-fold more substrate consumption in bioreactor than in shake flask. The 86.76-fold aqueous two-phase system-purified protease had a specific activity of 1416.73 Umg-1 which improved with increasing surfactant concentration.ConclusionThese results suggest significant bioprocess potential for sustainable cassava effluent management and concomitant commercial production of alkaline protease for industrial detergent application.

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Kinetic modeling of the simultaneous production of ethanol and fructose by Saccharomyces cerevisiae

Cited by 18 publications

References 34 publications

Effect of Nutrition on Microalgal Growth and Pollutant Decrease in Contaminated River

Effect of Nutrition on Microalgal Growth and Pollutant Decrease in Contaminated River

Production of functional beer with the addition of probiotic: Saccharomyces boulardii

A Novel Strain of Stenotrophomonas Acidaminiphila Produces Super-active Alkaline Protease During Cassava Effluent Fermentation: Process Optimization, Kinetic Modeling and Scale-up

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