12 documents found, page 1 of 2

Bioconversion of vine shoots into renewable products using ohmic heating extrac...

The valorization of vine shoots (VS), a lignocellulosic waste from the viticulture industry, was evaluated using different alternative and sustainable extraction processes. An innovative biorefinery approach, sequentially combining ohmic heating extraction (OHE) and autohydrolysis (AH), was selected for the extraction of nutraceutical compounds and bioethanol production. Overall, the use of both technologies im...

Strategies for the purification of hydroxytyrosol-rich extracts obtained from e...

ABSTRACT: Exhausted olive pomace (EOP) is a residual biomass from which hydroxytyrosol can be recovered. This compound has applications in the food/pharma sectors, but its extraction yields complex extracts that require further purification for some applications. This work explores purification strategies based on membrane technology, liquid–liquid extraction (LLE), and solid-phase extraction with adsorbents an...

Deep eutectic solvents for improved biomass pretreatment: current status and fu...

Pretreatment processes - recognized as critical steps for efficient biomass refining - have received much attention over the last two decades. In this context, deep eutectic solvents (DES) have emerged as a novel alternative to conventional solvents representing a step forward in achieving more sustainable processes with both environmental and economic benefits. This paper presents an updated review of the stat...

An integrated olive stone biorefinery based on a two-step fractionation strategy

ABSTRACT: Olive stones (OS) constitute a waste lignocellulosic material produced by the olive oil industry in great amounts, that currently is only used as a low-value energy source for industrial or domestic boilers. Having in view its full valorization, this work proposes and validates an integrated strategy aiming to obtain three different streams of sugars / lignin-derived compounds. Dilute acid hydrolysis ...

Recovery of bioactive compounds from industrial exhausted olive pomace through ...

ABSTRACT: Simple Summary Exhausted olive pomace (EOP) is the main residue of the pomace oil extraction industry, which is generated in large quantities and has limited applications. Thus, this study aimed to obtain bioactive compounds from EOP using ultrasound-assisted extraction as a potential first valorization step. Two types of devices were tested: bath- and probe-type UAE. The operational parameters were s...

Engineering aspects of hydrothermal pretreatment: from batch to continuous oper...

Different pretreatments strategies have been developed over the years mainly to enhance enzymatic cellulose degradation. In the new biorefinery era, a more holistic view on pretreatment is required to secure optimal use of the whole biomass. Hydrothermal pretreatment technology is regarded as very promising for lignocellulose biomass fractionation biorefinery and to be implemented at the industrial scale for bi...

Restructuring the processes for furfural and xylose production from sugarcane b...

This study consisted in restructuring the processes for furfural and xylose production from sugarcane bagasse in a biorefinery concept for the residues utilization on ethanol production. The dilute acid hydrolysis conditions for furfural or xylose production were firstly established on laboratory scale and then reproduced on a 10-L bench reactor fed with direct steam. The furfural production was maximum when us...

Production, purification and characterisation of oligosaccharides from olive tr...

The production of oligosaccharides (OS) by olive tree pruning autohydrolysis in the range 170–230 °C was studied. The best results in terms of maximum yield of OS along with a low amount of byproducts were obtained at 180 °C. After purification by preparative gel filtration chromatography a range of OS-fractions with average degree of polymerisation (DP) from 25 to 3 was selected for further characterisation. G...

Evaluation of the potential of olive tree pruning and rapessed straw hydrolysat...

Acid hydrolysis as a strategy to increase the extraction of carbohydrates from ...