Experimental verification of various methods for biological hydrogen production

Usťak, Sergej; Havrland, B.; Muñoz, Jaime O.J.; Lojka, Bohdan; Lachman, J.

doi:10.1016/j.ijhydene.2006.12.010

Cited by 23 publications

(4 citation statements)

References 16 publications

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“…Microorganisms responsible for hydrogen production can be strict anaerobes, thermophiles, rumen bacteria, facultative anaerobes, or mixed cultures of several strains (Vardar-Schara et al 2008). Fermentation has the advantage over photosynthesis in that it produces a higher hydrogen yield and it is light independent, more stable, and technically simpler (Ust'ak et al 2007). Hydrogen can be produced by fermenting carbohydrate-rich raw materials; glucose, for example, can be transformed into hydrogen through propionic acid, butyric acid, or ethanol-type fermentations (Kapdan and Kargi 2006).…”

Section: Hydrogenmentioning

confidence: 99%

Whey-derived valuable products obtained by microbial fermentation

Pescuma

Valdez

Mozzi

2015

Appl Microbiol Biotechnol

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Whey, the main by-product of the cheese industry, is considered as an important pollutant due to its high chemical and biological oxygen demand. Whey, often considered as waste, has high nutritional value and can be used to obtain value-added products, although some of them need expensive enzymatic synthesis. An economical alternative to transform whey into valuable products is through bacterial or yeast fermentations and by accumulation during algae growth. Fermentative processes can be applied either to produce individual compounds or to formulate new foods and beverages. In the first case, a considerable amount of research has been directed to obtain biofuels able to replace those derived from petrol. In addition, the possibility of replacing petrol-derived plastics by biodegradable polymers synthesized during bacterial fermentation of whey has been sought. Further, the ability of different organisms to produce metabolites commonly used in the food and pharmaceutical industries (i.e., lactic acid, lactobionic acid, polysaccharides, etc.) using whey as growth substrate has been studied. On the other hand, new low-cost functional whey-based foods and beverages leveraging the high nutritional quality of whey have been formulated, highlighting the health-promoting effects of fermented whey-derived products. This review aims to gather the multiple uses of whey as sustainable raw material for the production of individual compounds, foods, and beverages by microbial fermentation. This is the first work to give an overview on the microbial transformation of whey as raw material into a large repertoire of industrially relevant foods and products.

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Section: Hydrogenmentioning

confidence: 99%

Whey-derived valuable products obtained by microbial fermentation

Pescuma

Valdez

Mozzi

2015

Appl Microbiol Biotechnol

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“…These biological approaches mainly aim at the heterologous production of hydrogenases but also the production of other hydrogen-generating enzymes, such as nitrogenases [154][155][156], modified photosystem I [157][158][159], or semisynthetic catalysts composed of a chemically synthesized metal catalysts and a recombinantly produced protein [160][161][162]. Here, the fermentative hydrogen production is generally more efficient than the photosynthetic one because of its numerous benefits: (i) independence from the availability of light in dark fermentation [163,164]; (ii) higher H 2 production rates [165,166]; (iii) use of a wide range of carbon sources (more attractively from wastes); (iv) requirement of less energy; and (v) technical much simpler and more stable process [167][168][169].…”

Section: Biohydrogen Production Through Heterologous Gene Expressionmentioning

confidence: 99%

Heterologous Hydrogenase Overproduction Systems for Biotechnology—An Overview

Fan

Neubauer

Lenz

et al. 2020

IJMS

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Hydrogenases are complex metalloenzymes, showing tremendous potential as H2-converting redox catalysts for application in light-driven H2 production, enzymatic fuel cells and H2-driven cofactor regeneration. They catalyze the reversible oxidation of hydrogen into protons and electrons. The apo-enzymes are not active unless they are modified by a complicated post-translational maturation process that is responsible for the assembly and incorporation of the complex metal center. The catalytic center is usually easily inactivated by oxidation, and the separation and purification of the active protein is challenging. The understanding of the catalytic mechanisms progresses slowly, since the purification of the enzymes from their native hosts is often difficult, and in some case impossible. Over the past decades, only a limited number of studies report the homologous or heterologous production of high yields of hydrogenase. In this review, we emphasize recent discoveries that have greatly improved our understanding of microbial hydrogenases. We compare various heterologous hydrogenase production systems as well as in vitro hydrogenase maturation systems and discuss their perspectives for enhanced biohydrogen production. Additionally, activities of hydrogenases isolated from either recombinant organisms or in vivo/in vitro maturation approaches were systematically compared, and future perspectives for this research area are discussed.

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“…Dark fermentation does not require light, and it requires moderate operation conditions and can utilize various organic substrates with low energy demand [115]. However, it has a low hydrogen recovery of approximately 23-25% due to thermodynamic limitations [116,117]. To increase the efficiency, MEC is utilized to produce hydrogen from effluent from the fermentation [118,119].…”

Section: Perspective and Emerging Technologies Of Cluster V "Mec"mentioning

confidence: 99%

Analysis of Trends and Emerging Technologies in Water Electrolysis Research Based on a Computational Method: A Comparison with Fuel Cell Research

2018

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Abstract:Water electrolysis for hydrogen production has received increasing attention, especially for accumulating renewable energy. Here, we comprehensively reviewed all water electrolysis research areas through computational analysis, using a citation network to objectively detect emerging technologies and provide interdisciplinary data for forecasting trends. The results show that all research areas increase their publication counts per year, and the following two areas are particularly increasing in terms of number of publications: "microbial electrolysis" and "catalysts in an alkaline water electrolyzer (AWE) and in a polymer electrolyte membrane water electrolyzer (PEME).". Other research areas, such as AWE and PEME systems, solid oxide electrolysis, and the whole renewable energy system, have recently received several review papers, although papers that focus on specific technologies and are cited frequently have not been published within the citation network. This indicates that these areas receive attention, but there are no novel technologies that are the center of the citation network. Emerging technologies detected within these research areas are presented in this review. Furthermore, a comparison with fuel cell research is conducted because water electrolysis is the reverse reaction to fuel cells, and similar technologies are employed in both areas. Technologies that are not transferred between fuel cells and water electrolysis are introduced, and future water electrolysis trends are discussed.

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Experimental verification of various methods for biological hydrogen production

Cited by 23 publications

References 16 publications

Whey-derived valuable products obtained by microbial fermentation

Whey-derived valuable products obtained by microbial fermentation

Heterologous Hydrogenase Overproduction Systems for Biotechnology—An Overview

Analysis of Trends and Emerging Technologies in Water Electrolysis Research Based on a Computational Method: A Comparison with Fuel Cell Research

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