Production, extraction and characterization of microalgal and cyanobacterial exopolysaccharides.

The role of lignin and lignin-based materials in sustainable construction - A comprehensive review.

Laboratory investigation on chemical and rheological properties of bio-asphalt binders incorporating waste cooking oil

Evaluation of optimized bio-asphalt containing high content waste cooking oil residues

The culture of Chlorella vulgaris in a recycled supernatant: effects on biomass production and medium quality.

The valorization of Scenedesmus sp. microalgae byproducts was investigated, as a potential route for the production of road binders from renewable sources. Under hydrothermal liquefaction conditions, a water-insoluble viscous material was obtained in a ca. 55% yield, which consists of an oily fatty acid-based fraction mixed with organic and inorganic solid residues (up to 22%). Although the chemical composition of the obtained materials completely differs from that of petroleum-based bitumen, similar viscoelastic properties were observed in some cases, depending on the hydrothermal liquefaction experimental conditions. A rheological simple material could thus be obtained, which compared well with a bitumen reference.

pdf/subcritical-hydrothermal-liquefaction-of-microalgae-residues-3n9m3rxxf1.pdf

Subcritical Hydrothermal Liquefaction of Microalgae Residues as a Green Route to Alternative Road Binders

Modeling of Gas Flow through Isotropic Metallic Foams

Avec quelques milliers de tonnes par an, la filiere des microalgues est focalisee sur la biomasse seche et sur des produits a haute valeur obtenus par une simple extraction. Actuellement, l'attention se porte sur les microalgues photosynthetiques dans une strategie de valorisation de dechets (« waste-to-value ») : le CO2 de diverses sources industrielles, ainsi que des effluents nitrates, phosphates, etc. peuvent etre convertis en produits valorisables par raffinage de la biomasse en huiles, proteines, carbohydrates, engrais, biopolymeres, biogaz, biocarburants, oxygene, etc.

Valorisation industrielle des microalgues photosynthétiques

The invention relates to a viscoelastic material characterised in that it is produced by recovery of the hydrophobic phase obtained by a method of hydrothermal liquefaction from a biomass comprising at least one microalga and comprising at least 40 wt.% of water in relation to the total weight of the biomass, said hydrophobic phase comprising a viscoelastic oil and solid residues, wherein the quantity of solid residues amounts to between 15 wt.% and 30 wt.% of the total weight of the hydrophobic phase.

Viscoelastic material produced by hydrothermal liquefaction of microalgae

In this paper we present the reactive extrusion process to extract the phycocolloids from the sea products. By comparing with other techniques, this process has a several advantages like the economic return, the flexibility, the production of various products with different characteristics and time gains. There are two types of extruder: single-screw and double-screw, each one has its specific properties. The solid products are introduced by means of the hopper that is equipped with a dosage pump for the regulation of the flow. Liquid products are, generally, injected in the not filled zones, through an external pump. The products undergo thermo mechanical modifications and then the shaping of the final products was done in the die. The reactive extrusion is applied in several fields: agri-food where there are three main types of operating conditions (simple extrusion, extrusion-cooking, reactive extrusion), in the plastic industry for the recycling of household plastic waste and also to create mixtures between different polymers, as well in the field of chemistry and pharmaceutics. The reactive extrusion is used also to add value to the sea products like to extract phycocolloids especially the alginate from the seaweeds, also the chitin from crustacean by-product. A further interesting application of the reactive extrusion process is the energy production. Recent research is aimed to the valorization of fish by-products for the extraction of lipids for biofuel purpose.

Reactive and/or enzymatic extrusion process for phycocolloids extraction: application to sea products

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