Effect of alkaline pretreatments on the enzymatic hydrolysis of wheat straw

Kontogianni, Nikoleta; Barampouti, Elli Maria; Mai, Sofia; Malamis, Dimitris; Loizidou, Maria

dc.contributor.author	Kontogianni, Nikoleta
dc.contributor.author	Barampouti, Elli Maria
dc.contributor.author	Mai, Sofia
dc.contributor.author	Malamis, Dimitris
dc.contributor.author	Loizidou, Maria
dc.date.accessioned	2021-03-26T11:40:08Z
dc.date.available	2021-03-26T11:40:08Z
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/53147
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.20845
dc.rights	Default License
dc.subject	Crystallinity	en
dc.subject	Delignification efficiency	en
dc.subject	Lignin	en
dc.subject	Agro-residues	en
dc.subject	Alkaline peroxide	en
dc.title	Effect of alkaline pretreatments on the enzymatic hydrolysis of wheat straw	en
heal.type	journalArticle
heal.classification	Environmental Science	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2019-12-02
heal.bibliographicCitation	Kontogianni, N., Barampouti, E.M., Mai, S. et al. Effect of alkaline pretreatments on the enzymatic hydrolysis of wheat straw. Environ Sci Pollut Res 26, 35648–35656 (2019).	en
heal.abstract	Lignocellulosic materials are mainly consisted of lignin, cellulose, and hemicellulose. Lignin is recognized as the main obstacle for the enzymatic saccharification of cellulose towards the fermentable sugars’ production. Hence, the removal of lignin from the lignocellulosic feedstock is beneficial for reducing the recalcitrance of lignocellulose for enzymatic attack. For this purpose, various different alkaline pretreatments were examined in order to study their effect on the enzymatic saccharification of wheat straw, as a typical lignocellulosic material. Results revealed that the alkaline pretreatments promoted delignification reactions. Regarding the removal of lignin, the most efficient pretreatments were alkaline treatment with hydrogen peroxide 10% and NaOH 2% autoclave with delignification efficiencies of 89.60% and 84.86% respectively. X-ray diffraction analysis was performed to enlighten the structural changes of raw and pretreated materials. The higher the delignification of the raw material, the higher the conversion of cellulose during enzymatic saccharification. In all cases after enzymatic saccharification, the cellulosic conversion was much higher (32–77%) than the untreated wheat straw (8.6%). After undergoing alkaline peroxide 10% pretreatment and cellulase treatment, 99% of the initial raw straw was eventually solubilized. Thus, wheat straw could be considered as an ideal material for the production of glucose with proper pretreatments and effective enzymatic hydrolysis.	en
heal.publisher	Springer	en
heal.journalName	Environmental Science and Pollution Research	en
heal.journalType	peer-reviewed
heal.fullTextAvailability	false
dc.identifier.doi	https://doi.org/10.1007/s11356-019-06822-3	el