Innovative physically-assisted soda fractionation of rapeseed hulls for better recovery of biopolymers

Abstract

A better knowledge of the effect of non-conventional pretreatment technologies, which can avoid the use of high temperatures and detrimental solvents, is necessary.

Chemical Characterization of Non-Saccharidic and Saccharidic Components of Rapeseed Hulls and Sunflower Shells

“…Rapeseed hulls are described as a pectin-rich feedstock (Aspinall and Jiang 1974). In terms of the non-saccharidic fraction, it seems that in contrast to sunflower shells, rapeseed hulls are a non-lignified biomass (Brahim et al 2016). Nevertheless, the literature on this topic is scarce.…”

“…Thermal treatment was performed in a Turbomatrix 300 Thermal Desorber system from Perkin Elmer, Waltham, USA, and GC-MS analysis was performed on a Perkin-Elmer Clarus 500 GC gas chromatograph (conditions given in Brahim et al 2016). Table 1 gives the composition of the RH and SS used in this study.…”

“…The quantification of sugars was performed using a Dionex ICS-3000 system consisting of a gradient pump, an autosampler, an electrochemical detector with a gold working electrode, an Ag/AgCl reference electrode, and Chromeleon version 6.8 (Dionex Corp., Sunnyvale, USA) as previously described (Brahim et al 2016). The sugar content of the polysaccharides was determined based on the monomer content measured after a two-step acid hydrolysis procedure.…”

“…The autoclaved samples were filtered, and the dried residue was weighed to obtain the acid-insoluble residue content. The sugar-rich liquid was analyzed by ionic chromatography using a Dionex ICS-3000 system (Sunnyvale, USA) as previously described (Brahim et al 2016).…”

“…There are few reports regarding the composition and potential uses of these industrial co-products. Most of the reports deal with thermal applications like pyrolysis and combustion (Demirbas 2003;Bilgic et al 2016), bioethanol production (Sharma et al 2004;Brahim et al 2016), and phenolics extraction (Naczk et al 1998;Amarowicz et al 2000;Liu et al 2012).…”