Enhancement of hydrogen production rate by high biomass concentrations of Thermotoga neapolitana

Dreschke, Gilbert; d’Ippolito, Giuliana; Pánico, Antonio; Lens, Piet N.L.; Esposito, Giovanni; Fontana, Angelo

doi:10.1016/j.ijhydene.2018.05.072

Cited by 13 publications

(5 citation statements)

References 43 publications

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“…Using various initial biomass concentrations of T. neapolitana subs. capnolactica (in the range of 0.46–1.74 g CDW/L) under CO 2 atmosphere, hydrogen yield and the distribution of end-products were unaffected ( Table 2 ) [ 68 ]. However, increasing inoculum size from 0.46 to 1.74 g/L reduced the fermentation time from 7 h to 3 h [ 68 ].…”

Section: Operating Conditionsmentioning

confidence: 99%

“…capnolactica (in the range of 0.46–1.74 g CDW/L) under CO 2 atmosphere, hydrogen yield and the distribution of end-products were unaffected ( Table 2 ) [ 68 ]. However, increasing inoculum size from 0.46 to 1.74 g/L reduced the fermentation time from 7 h to 3 h [ 68 ]. Moreover, the hydrogen production rate, glucose consumption rate, and biomass growth rate were increased [ 49 , 50 , 68 ].…”

Section: Operating Conditionsmentioning

confidence: 99%

“…However, increasing inoculum size from 0.46 to 1.74 g/L reduced the fermentation time from 7 h to 3 h [ 68 ]. Moreover, the hydrogen production rate, glucose consumption rate, and biomass growth rate were increased [ 49 , 50 , 68 ]. It is worth pointing out that Ngo et al [ 116 ] reported a reverse correlation between hydrogen production rate and inoculum size, stating that high initial biomass corresponded to a mild reduction of hydrogen production rate [ 116 ].…”

Section: Operating Conditionsmentioning

confidence: 99%

“…In recent years, many researchers have been focusing on the optimization of fermentation performance towards the production of hydrogen and other target end-products [ 30 , 43 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 ].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Cultivation Parameters on Fermentation and Hydrogen Production in the Phylum Thermotogae

Lanzilli

Esercizio

Vastano

et al. 2020

IJMS

Self Cite

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The phylum Thermotogae is composed of a single class (Thermotogae), 4 orders (Thermotogales, Kosmotogales, Petrotogales, Mesoaciditogales), 5 families (Thermatogaceae, Fervidobacteriaceae, Kosmotogaceae, Petrotogaceae, Mesoaciditogaceae), and 13 genera. They have been isolated from extremely hot environments whose characteristics are reflected in the metabolic and phenotypic properties of the Thermotogae species. The metabolic versatility of Thermotogae members leads to a pool of high value-added products with application potentials in many industry fields. The low risk of contamination associated with their extreme culture conditions has made most species of the phylum attractive candidates in biotechnological processes. Almost all members of the phylum, especially those in the order Thermotogales, can produce bio-hydrogen from a variety of simple and complex sugars with yields close to the theoretical Thauer limit of 4 mol H2/mol consumed glucose. Acetate, lactate, and L-alanine are the major organic end products. Thermotagae fermentation processes are influenced by various factors, such as hydrogen partial pressure, agitation, gas sparging, culture/headspace ratio, inoculum, pH, temperature, nitrogen sources, sulfur sources, inorganic compounds, metal ions, etc. Optimization of these parameters will help to fully unleash the biotechnological potentials of Thermotogae and promote their applications in industry. This article gives an overview of how these operational parameters could impact Thermotogae fermentation in terms of sugar consumption, hydrogen yields, and organic acids production.

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Section: Operating Conditionsmentioning

confidence: 99%

Section: Operating Conditionsmentioning

confidence: 99%

Section: Operating Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Cultivation Parameters on Fermentation and Hydrogen Production in the Phylum Thermotogae

Lanzilli

Esercizio

Vastano

et al. 2020

IJMS

Self Cite

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“…Subsequently, both curves fell slightly and rose again slightly at 30 h. One explanation for this is that cell growth causes more sugar, especially glucose, to be metabolized, and thus H 2 is formed due to glycolysis [47]. Due to the amount of H 2 formed here in the gas and liquid phase, hydrogen acts as a strong inhibitor during dark fermentation [58]. Thus, cell growth is inhibited at a high H 2 concentration.…”

Section: Fermentationmentioning

confidence: 99%

Hydrogen Production from Enzymatic Pretreated Organic Waste with Thermotoga neapolitana

Tix,

Moll,

Krafft

et al. 2024

Energies

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Biomass from various types of organic waste was tested for possible use in hydrogen production. The composition consisted of lignified samples, green waste, and kitchen scraps such as fruit and vegetable peels and leftover food. For this purpose, the enzymatic pretreatment of organic waste with a combination of five different hydrolytic enzymes (cellulase, amylase, glucoamylase, pectinase and xylase) was investigated to determine its ability to produce hydrogen (H2) with the hydrolyzate produced here. In course, the anaerobic rod-shaped bacterium T. neapolitana was used for H2 production. First, the enzymes were investigated using different substrates in preliminary experiments. Subsequently, hydrolyses were carried out using different types of organic waste. In the hydrolysis carried out here for 48 h, an increase in glucose concentration of 481% was measured for waste loads containing starch, corresponding to a glucose concentration at the end of hydrolysis of 7.5 g·L−1. In the subsequent set fermentation in serum bottles, a H2 yield of 1.26 mmol H2 was obtained in the overhead space when Terrific Broth Medium with glucose and yeast extract (TBGY medium) was used. When hydrolyzed organic waste was used, even a H2 yield of 1.37 mmol could be achieved in the overhead space. In addition, a dedicated reactor system for the anaerobic fermentation of T. neapolitana to produce H2 was developed. The bioreactor developed here can ferment anaerobically with a very low loss of produced gas. Here, after 24 h, a hydrogen concentration of 83% could be measured in the overhead space.

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Fundamentals of Biofuel Production Using Anaerobic Digestion: Metabolic Pathways and Factors Affecting the Process

Braga

Zaiat

2022

Applied Environmental Science and Engineering for a Sustainable Future

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Enhancement of hydrogen production rate by high biomass concentrations of Thermotoga neapolitana

Cited by 13 publications

References 43 publications

Effect of Cultivation Parameters on Fermentation and Hydrogen Production in the Phylum Thermotogae

Effect of Cultivation Parameters on Fermentation and Hydrogen Production in the Phylum Thermotogae

Hydrogen Production from Enzymatic Pretreated Organic Waste with Thermotoga neapolitana

Fundamentals of Biofuel Production Using Anaerobic Digestion: Metabolic Pathways and Factors Affecting the Process

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