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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...

Integrated microbial processes for biofuels and high value-added products: the ...

The production of microbial biofuels is currently under investigation, as they are alternative sources to fossil fuels, which are diminishing and their use has a negative impact on the environment. However, so far, biofuels derived from microbes are not economically competitive. One way to overcome this bottleneck is the use of microorganisms to transform substrates into biofuels and high value-added products,...

New at-line flow cytometric protocols for determining carotenoidcontent and cel...

Rhodosporidium toruloides NCYC 921 batch growth was monitored as a means to evaluate the yeastbiomass potential as a source for the production of carotenoids and other lipids.Carotenoid content, cell viability and size were assessed by multiparameter flow cytometry. Thesaponifiable lipid fraction was assayed by gas–liquid chromatography.The carotenoid production increased during the stationary phase, reaching 7...

Effect of light on the production of bioelectricity and added-value microalgae ...

This study demonstrates the simultaneous production of bioelectricity and added-value pigments in a Photosynthetic Alga Microbial Fuel Cell (PAMFC). A PAMFC was operated using Chlorella vulgaris in the cathode compartment and a bacterial consortium in the anode. The system was studied at two different light intensities and the maximum power produced was 62.7 mW/m2 with a light intensity of 96 lE/(m2 s). The re...

From tiny microalgae to huge biorefineries

Microalgae are an emerging research field due to their high potential as a source of several biofuels in addition to the fact that they have a high-nutritional value and contain compounds that have health benefits. They are also highly used for water stream bioremediation and carbon dioxide mitigation. Therefore, the tiny microalgae could lead to a huge source of compounds and products, giving a good example of...

Chemical and biological-based isoprene production: Green metrics

Green metrics is a methodology which allows the greenness of either new or already existing processesto be assessed. This paper is a part of a special issue devoted to green metrics in which this methodologyis applied to different processes to assess bio and petrochemical routes. In this work, green metrics wereused as a tool to validate and compare the petrochemical and biological processes of isoprene product...

Insights on the safety of carotenogenic Chlorella vulgaris in rodents

Chlorella vulgaris (Cv) biomass is widely used as a traditional food in the Orient and its safety for human consumption has been proved. However, carotenogenic biomass (orange), resulting from induced stresses, needs further safety evaluation, which is the aim of this study. The preliminary toxicological characterization of Cv consisted of a single dose (mice), repeated dose studies (mice and rats) and a biodis...

Biorrefinarias de microalgas

As microalgas autotróficas são organismos fotossintéticos, que graças à sua “maquinaria fotossintética” são capazes de transformar a energia luminosa em energia química com a produção de compostos orgânicos. Os propósitos económicos de produção de biomassa microalgal têm-se alterado ao longo das últimas décadas: após a fase inicial de produção de SCP (single cell protein) para alimentar um mundo carente de alim...

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

Green metrics evaluation of isoprene production by microalgae and bacteria

Isoprene is a key intermediate compound for the production of synthetic rubber and adhesives and is also used as a building block in the chemical industry. Traditionally, isoprene is obtained from crude oil during the refinery process. Nevertheless, plants and animals are also able to synthesize this important compound. This work compares two renewable approaches for isoprene production: by photosynthetic organ...