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Scenedesmus obliquus as feedstock for biohydrogen production by Enterobacter ae...

Hydrogen (H2) gas is seen as an ideal future energy carrier because it is easily converted into electricity in fuel cells, liberates a large amount of energy per unit mass, and generates no air pollutants. In this work, biological hydrogen (bioH2) was produced from the microalgal biomass of Scenedesmus obliquus which was used as a substrate for the fermentation by Enterobacter aerogenes ATCC 13048 and Clostridi...

Fermentative hydrogen production from microalgal biomass and agricultural wastes

Renewable, sustainable and carbon-neutral energy production is needed to deal with the challenges of the currently growing energy demand and deleterious climate changes. Hydrogen (H2) is presently seen as an ideal future energy carrier with technical, socio-economic and environmental benefits. H2 can be produced through biological conversion by photosynthesis, photo-heterotrophic and dark fermentation. The inte...

Diferenciação de isolados bacterianos com base no gene de Fe-hidrogenases

O processo fermentativo de producao de H2 por microrganismos depende fundamentalmente da presenca de metaloenzimas designadas por hidrogenases. As hidrogenases sao enzimas envolvidas no metabolismo do H2, capazes de produzir ou consumir hidrogenio molecular, em processos relacionados com a transferencia de electroes e obtencao de energia. Elas catalisam a reaccao reversivel: H2 . 2H++ 2e- [1]. As hidrogenases d...

Valorization of chestnut shells for hydrogen production by Clostridium butyricu...

Chestnut shell s (CS) is an agronomic waste generated from the peeling process of the chestnut fruit. It is well-known that the extract of CS contains high amounts of tannins, which are polyphenolic antioxidants1, but this agronomic residue also contains about 36% sugars in form of polysaccharides, and no utilization of chestnut shells as potential source of fermentable sugars has been considered so far. As con...

Biohydrogen production from microalgal biomass: energy requirement, CO2 emissio...

Evaluation of energy consumption and CO2 emissions in the production of biohydr...

The use of alternative fuels is increasing in order to reduce the energy consumption and emissions. The 2003/30/EC European Directive aims to promote the use of biofuels and other renewable fuels instead of oil derivatives for transport purposes. In long term this is expected to contribute to the fulfillment of European climate change agreements. Therefore, hydrogen appears as a promising alternative fuel and “...

Energy requirement and CO2 emissions of bioH2 production from microalgal biomass

This paper presents the life cycle inventory (LCI) of hydrogen production by Clostridium butyricum fermentation of Scenedesmus obliquus hydrolysate. The main purpose of this work was to evaluate the potential of H2 production from microalgal biomass and the respective energy consumption and CO2 emissions in the bioconversion process considering the microalga production, acid hydrolysis of S. obliquus biomass, p...

Biohydrogen fermantative production : energetic valorization of microalgae biomass

Renewable, sustainable and carbon-neutral energy production is needed to deal with the challenges of growing energy demand and climate change. Hydrogen (H2) is most promising in the succession of fuel evolution, with several technical, socio-economic and environmental benefits to its credit [1]. It is an excellent energy carrier as it has the highest energy content per unit weight/mass of any known fuel (142 kJ...

Microalgae as a sustainable raw material for biofuels production and high added...

Microalgae biomass as fermentation substrate for hydrogen and butyric acid prod...

Fossil fuels are a limited type of feedstock, increasingly expensive, and carrying strong polluting properties. The search for alternative sources which can replace fossil fuels without the severe disadvantages that its use conveys is therefore of paramount importance. Microalgae biomass represents an example of such non-food renewable biomass that can be regarded as a valid alternative to fossil fuels. As biom...