Assessment via the modified gompertz-model reveals new insights concerning the effects of ionic liquids on biohydrogen production

Nemestóthy, Nándor; Bakonyi, Péter; Rózsenberszki, Tamás; Kumar, Gopalakrishnan; Koók, László; Kelemen, Gábor; Kim, Jun Seok; Bélafi–Bakó, Katalin

doi:10.1016/j.ijhydene.2018.08.174

Cited by 26 publications

(4 citation statements)

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“…Many ILs have been reported to possess some kind of toxic behavior in various microorganisms. Recently, it was shown by Nemestóthy et al [31] through a kinetic study that ILs such as [bmim][Cl] and [bmim][Ac], depending on their concentrations, caused a notable loss of metabolic activity of an anaerobic hydrogen-producing community. Furthermore, Hernández-Fernández et al [32] pointed out that the escape of IL from SILMs to the anolyte contributed to depression of the MFC performance, probably due to perturbation of the whole-cell, electrochemically-active, living biocatalysts.…”

Section: Research Progress With Supported Ionic Liquid Membranes For mentioning

confidence: 99%

Development and Application of Supported Ionic Liquid Membranes in Microbial Fuel Cell Technology: A Concise Overview

et al. 2020

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Membrane separators are key elements of microbial fuel cells (MFCs), especially of those constructed in a dual-chamber configuration. Until now, membranes made of Nafion have been applied the most widely to set-up MFCs. However, there is a broader agreement in the literature that Nafion is expensive and in many cases, does not meet the actual (mainly mass transfer-specific) requirements demanded by the process and users. Driven by these issues, there has been notable progress in the development of alternative materials for membrane fabrication, among which those relying on the deployment of ionic liquids are emerging. In this review, the background of and recent advances in ionic liquid-containing separators, particularly supported ionic liquid membranes (SILMs), designed for MFC applications are addressed and evaluated. After an assessment of the basic criteria to be fulfilled by membranes in MFCs, experiences with SILMs will be outlined, along with important aspects of transport processes. Finally, a comparison with the literature is presented to elaborate on how MFCs installed with SILM perform relative to similar systems assembled with other, e.g., Nafion, membranes.

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Section: Research Progress With Supported Ionic Liquid Membranes For mentioning

confidence: 99%

Development and Application of Supported Ionic Liquid Membranes in Microbial Fuel Cell Technology: A Concise Overview

et al. 2020

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“…In accordance with the previous argument, the pH was varied between 2.5 and 4 (Table 1). To characterize the batch itaconic acid fermentation kinetics, under the conditions listed in Table 1, the modified Gompertz-model (Equation (1)) was adopted [30]:…”

Section: Resultsmentioning

confidence: 99%

Optimized pH and Its Control Strategy Lead to Enhanced Itaconic Acid Fermentation by Aspergillus terreus on Glucose Substrate

et al. 2019

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Biological itaconic acid production can by catalyzed by Aspergillus terreus (a filamentous fungi) where the fermentation medium pH is of prominent importance. Therefore, in this work, we investigated what benefits the different pH regulation options might offer in enhancing the process. The batch itaconic acid fermentation data underwent a kinetic analysis and the pH control alternatives were ranked subsequently. It would appear that the pH-shift strategy (initial adjustment of pH to 3 and its maintenance at 2.5 after 48 h) resulted in the most attractive fermentation pattern and could hence be recommended to achieve itaconic acid production with an improved performance using A. terreus from carbohydrate, such as glucose. Under this condition, the itaconic acid titer potential, the maximal itaconic acid (titer) production rate, the length of lag-phase and itaconic acid yield were 87.32 g/L, 0.22 g/L/h, 56.04 h and 0.35 g/g glucose, respectively.

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“…The biological production of H 2 has been largely modeled according to the modified Gompertz model [30][31][32], since it encompasses the bacterial cell growth coupled with a parsimonious parametrization of the hydrogen production with more direct physical meaning [33,34]. The modified Gompertz model has the expression given in Equation (15), where H is the cumulated hydrogen produced, which can be given in moles, liters, or moles per reactor volume [35].…”

Section: Kinetic Parameters-modified Gompertz Modelmentioning

confidence: 99%

Biological Hydrogen Production by Dark Fermentation in a Stirred Tank Reactor and Its Correlation with the pH Time Evolution

Martínez

Salierno

García³

et al. 2022

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Dark fermentation is a hydrogen generating process carried out by anaerobic spore-forming bacteria that metabolize carbon sources producing gas and short-chain acids. The process can be controlled, and the hydrogen harvested if bacteria are grown in a reactor with favorable conditions. In this work, bacteria selected from natural sources were grown with a defined culture media, while pH was monitored, with the aim of relating the amount of generated hydrogen to the increase in hydron ion concentration. Therefore, a model based on the acid-base species mass balance is proposed and solved to estimate the lag phase time and measure the hydrogen production efficiency and kinetics. Hydrogen production in a stirred batch reactor was performed for 150–200 h, at given operating conditions using a previously defined growth media, to validate the model. Using the proposed model, the cumulated moles of produced hydrogen correlate well with those predicted from the pH curve. Hence, the modified Gompertz model parameters, largely used for describing the hydrogen generation kinetics by dark fermentation, were estimated from the pH curve and from the experimentally measured generated hydrogen. Satisfactory agreement was found, thus, validating the method.

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Assessment via the modified gompertz-model reveals new insights concerning the effects of ionic liquids on biohydrogen production

Cited by 26 publications

References 50 publications

Development and Application of Supported Ionic Liquid Membranes in Microbial Fuel Cell Technology: A Concise Overview

Development and Application of Supported Ionic Liquid Membranes in Microbial Fuel Cell Technology: A Concise Overview

Optimized pH and Its Control Strategy Lead to Enhanced Itaconic Acid Fermentation by Aspergillus terreus on Glucose Substrate

Biological Hydrogen Production by Dark Fermentation in a Stirred Tank Reactor and Its Correlation with the pH Time Evolution

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