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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10277/630

Autori: Gandolfi, Stefano
Tutor interno: POLLEGIONI, LOREDANO
Titolo: Hemp hurds biorefining for chemicals productions. Chemical characterization, organosolv fractionation and enzymatic depredation for sugars exploitation
Abstract: Lignocellulosic biomass has been highlighted to be a sustainable and renewable feedstock for fossil source replacement. As in the petroleum refinery, the challenges are in making the cellulose fraction accessible to enzymes during enzymatic hydrolysis and maximizing the utilization of all the constituents within the feedstock. In a biorefinery facility the fermentation of the saccharidic fraction to liquid fuels or chemicals provide the gross value, whereas the valorization of the others constituents help to make the process economically viable. In this work the effective fractionation of hemp hurds (HH) into its three main components, cellulose, hemicellulose, and lignin, has been obtained by means of an organosolv pretreatment step followed by enzymatic hydrolysis of the pretreated HH. The effect of different process variables and the kinetic of enzymatic hydrolysis have been studied; the two steps were optimized to yield the highest amounts of fermentable monomeric xylose (from hemicellulose, C5) and glucose (from cellulose, C6). The aptness of C5 and C6 streams has been evaluated, in a fermentation process, by producing butanol and lactic acid, two of the most valuable platform chemicals for biorefinery. In particular, 42 g of polymer-grade lactic acid has been obtained from 100 g of raw HH. These results can be considered promising for HH valorization through the biorefinery concept.
Parole chiave: missing
MIUR : BIO/10 BIOCHIMICA
Data: 2015
Lingua: eng
Corso di dottorato: Biotecnologie
Ciclo di dottorato: 28
Università di conseguimento titolo: Università degli Studi dell'Insubria
Altre informazioni: Istituto di Chimica del Riconoscimento Molecolare - Consiglio Nazionale delle Ricerche (ICRM-CNR)- Milano.
Citazione: Gandolfi, S.Hemp hurds biorefining for chemicals productions. Chemical characterization, organosolv fractionation and enzymatic depredation for sugars exploitation (Doctoral Thesis, Università degli Studi dell'Insubria, 2015).

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Phd_Thesis_Gandolfistefano_part1.pdftesto tesi parte 14,28 MBAdobe PDFconsultabile a partire dal: 19/12/2017 Visualizza/apri
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Phd_Thesis_Gandolfistefano_articolo_ChemSusChem.pdfarticolo ChemSusChem1,89 MBAdobe PDFnon consultabile Visualizza/apri
Phd_Thesis_Gandolfistefano_articolo_BioresTechnol.pdfarticolo Biores Technol375,79 kBAdobe PDFnon consultabile Visualizza/apri


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