Optimization of hydrogen production by the psychrophilic strain G088

Alvarez-Guzmán, Cecilia L.; Balderas‐Hernández, Víctor E.; González‐García, Raúl; Ornelas-Salas, José Tomás; Vidal-Limón, Abraham; Cueva, Sergio Cisneros-de la; León‐Rodríguez, Antonio De

doi:10.1016/j.ijhydene.2016.08.098

Cited by 15 publications

(5 citation statements)

References 39 publications

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“…For process intensification, the approaches such as pure culture, continuous operation, consolidated saccharification and fermentation, chemical additions, are optimization avenues. In this work, for convenience of discussions, the comparisons were divided into the following five categories, namely pure culture (PC) [73,[84][85][86][87][88][89][90][91][92][93][94], chemical additions (CA) [2,39,76,[95][96][97], continuous operation with mixed culture (COMC) [98][99][100][101][102], batch operation with mixed culture (BOMC) [103][104][105][106][107][108] and consolidated saccharification and fermentation (CSF) [18,31,61,[109][110][111], respectively. For quantitative comparison of hydrogen yield across different literatures, the necessary Carbon-molar-based mass balance for DF is pivotal and necessary.…”

Section: Results Comparison Among Different Process Intensificationsmentioning

confidence: 99%

A Review of Biohydrogen Productions from Lignocellulosic Precursor via Dark Fermentation: Perspective on Hydrolysate Composition and Electron-Equivalent Balance

et al. 2020

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This paper reviews the current technological development of bio-hydrogen (BioH2) generation, focusing on using lignocellulosic feedstock via dark fermentation (DF). Using the collected reference reports as the training data set, supervised machine learning via the constructed artificial neuron networks (ANNs) imbedded with feed backward propagation and one cross-out validation approach was deployed to establish correlations between the carbon sources (glucose and xylose) together with the inhibitors (acetate and other inhibitors, such as furfural and aromatic compounds), hydrogen yield (HY), and hydrogen evolution rate (HER) from reported works. Through the statistical analysis, the concentrations variations of glucose (F-value = 0.0027) and acetate (F-value = 0.0028) were found to be statistically significant among the investigated parameters to HY and HER. Manipulating the ratio of glucose to acetate at an optimal range (approximate in 14:1) will effectively improve the BioH2 generation (HY and HER) regardless of microbial strains inoculated. Comparative studies were also carried out on the evolutions of electron equivalent balances using lignocellulosic biomass as substrates for BioH2 production across different reported works. The larger electron sinks in the acetate is found to be appreciably related to the higher HY and HER. To maintain a relative higher level of the BioH2 production, the biosynthesis needs to be kept over 30% in batch cultivation, while the biosynthesis can be kept at a low level (2%) in the continuous operation among the investigated reports. Among available solutions for the enhancement of BioH2 production, the selection of microbial strains with higher capacity in hydrogen productions is still one of the most phenomenal approaches in enhancing BioH2 production. Other process intensifications using continuous operation compounded with synergistic chemical additions could deliver additional enhancement for BioH2 productions during dark fermentation.

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Section: Results Comparison Among Different Process Intensificationsmentioning

confidence: 99%

A Review of Biohydrogen Productions from Lignocellulosic Precursor via Dark Fermentation: Perspective on Hydrolysate Composition and Electron-Equivalent Balance

et al. 2020

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“…The normal plot of the residuals (Figure 3c) shows that the errors are randomly distributed along a straight line, convincingly demonstrating that the model has a strong predictive ability for optimizing lipid production. Adequate precision measures the ratio of signal to noise, with a value greater than 4 being a necessary prerequisite for a good model fit [50,51]. In this study, the precision of 18.187 indicates that the model is sufficiently accurate for exploring the design space.…”

Section: Assessment Of the Regression Model And Adequacy Check For Li...mentioning

confidence: 90%

Production of Microbial Lipids by Saitozyma podzolica Zwy2-3 Using Corn Straw Hydrolysate, the Analysis of Lipid Composition, and the Prediction of Biodiesel Properties

Feng,

Guo,

Ran

et al. 2023

Energies

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Although Saitozyma podzolica Zwy2-3 can use the enzymatic hydrolysate of corn stalks treated with an ammonium carbonate-steam explosion (EHCS-ACSE) as a substrate for lipid accumulation, the inefficient conversion of sugars from EHCS-ACSE into lipids necessitates the further optimization of fermentation parameters. Response surface design was used to optimize the primary fermentation parameters. Under the optimized conditions of the reducing sugar concentration of 89.44 g/L, yeast extract concentration of 3.88 g/L, rotational speed of 219 rpm, and incubation time of 122 h, the maximum lipid production achieved 11.45 g/L, which was 2.28 times higher than the results of the previous study. In addition, lipid profiling showed the presence of four fatty acid methyl esters, with the highest percentage being 61.84% oleic acid, followed by 21.53% palmitic acid, 13.05% stearic acid, and 3.58% linoleic acid. It is noteworthy that the composition and relative abundance of microbial lipids remained constant under different culture conditions. The characteristics of Zwy2-3 biodiesel, such as the iodine value (62.09), cetane number (59.29), density (0.87 g/cm3), and oxidation stability (35.53), meet the international standards (ASTM D6751-02 and EN 14214) for biodiesel. The present study further demonstrated that S. podzolica Zwy2-3 can efficiently utilize EHCS-ACSE for microbial lipid accumulation, and its lipids have favorable qualities that make them suitable for biodiesel production.

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“…This led to exploring production by using cold-active bacteria as a new field of research to boost hydrogen production. An improvement in hydrogen productivity was observed due to the equivalence of the hydrogen produced by some cold-adapted bacteria and that of other thermolabile strains (27,28). However, the efficiency of hydrogen production is challenged by the slow catalytic activity and increased lag time.…”

Section: Biohydrogen-producing Bacteriamentioning

confidence: 99%

Potentials and limitations of cold-adapted hydrogen producing bacteria: A mini review

Mohammed,

Abdul-Wahab,

Mohammed

et al. 2023

Af J Clin Exp Micro

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Low-temperature bacteria have potential to produce biohydrogen and are often considered a potential renewable energy generator for the future. However, the bacteria have presented poor hydrogen yield due to slow metabolic rate and prolonged lag phase often caused by their restricted growth temperature limit. The ineffective search for new biocatalysts from cold environments and the application of modification techniques almost jeopardize the economic viability of these strains in the biohydrogen production research. This article examined cold genetic and enzymatic adaptation potentials that led to the continuous expression of novel biocatalysts of biotechnological importance under the following headings; cold-adapted bacteria, biohydrogen-producing bacteria, strategies for adapting to stress in low temperatures, performance of cold-adapted bacteria in biohydrogen production, challenges of cold-adapted bacteria in biohydrogen production and future prospect. Finding new strains and studying their unique properties can improve the efficiency of hydrogen production by cold-adapted bacteria, as this new area has not yet been extensively studied.

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Optimization of hydrogen production by the psychrophilic strain G088

Cited by 15 publications

References 39 publications

A Review of Biohydrogen Productions from Lignocellulosic Precursor via Dark Fermentation: Perspective on Hydrolysate Composition and Electron-Equivalent Balance

A Review of Biohydrogen Productions from Lignocellulosic Precursor via Dark Fermentation: Perspective on Hydrolysate Composition and Electron-Equivalent Balance

Production of Microbial Lipids by Saitozyma podzolica Zwy2-3 Using Corn Straw Hydrolysate, the Analysis of Lipid Composition, and the Prediction of Biodiesel Properties

Potentials and limitations of cold-adapted hydrogen producing bacteria: A mini review

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