Conversion of Lignocellulosic Material Into Fermentable Sugars

Enzymatic hydrolysis process of lignocellulosic biomass materials is difficult because of inherent structural features of biomass, which represents barriers that prevent complete hydrolysis; therefore, pretreatment techniques are necessary to render biomass highly digestible in enzymatic hydrolysis...

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Autores principales:	Asem Hassan Mohammed, Frank Behrendt Behrendt, Frank Jürgen Methner
Formato:	article
Lenguaje:	EN
Publicado:	Al-Khwarizmi College of Engineering – University of Baghdad 2017
Materias:	lime pretreatment enzymatic hydrolysis lignocellulosic biomass willow wood Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
Acceso en línea:	https://doaj.org/article/2cbf77a7c56042f0915ef65ed1ccb80c
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spelling	oai:doaj.org-article:2cbf77a7c56042f0915ef65ed1ccb80c2021-12-02T07:16:39ZConversion of Lignocellulosic Material Into Fermentable Sugars10.22153/kej.2016.05.0061818-11712312-0789https://doaj.org/article/2cbf77a7c56042f0915ef65ed1ccb80c2017-12-01T00:00:00Zhttp://alkej.uobaghdad.edu.iq/index.php/alkej/article/view/329https://doaj.org/toc/1818-1171https://doaj.org/toc/2312-0789 Enzymatic hydrolysis process of lignocellulosic biomass materials is difficult because of inherent structural features of biomass, which represents barriers that prevent complete hydrolysis; therefore, pretreatment techniques are necessary to render biomass highly digestible in enzymatic hydrolysis process. In this research, (non?) oxidative short-term lime pretreatment of willow wood was used. A weight of 11.40 g of willow wood was mixed with an excess of calcium hydroxide (0.4 g Ca(OH)2/g raw biomass) and water loading (15 g/g raw biomass). Lime pretreatment was carried out for various periods of time including 1, 2, 3.5, 5 and 6 h, with temperatures at 100, 113, 130, 147 and 1600C, and oxygen pressures as oxidativeagent (6, 9, 13.5, 17.8, 21 bar absolute). The optimization of both pretreatment and enzymatic hydrolysis were depended on the maximum overall yields of glucan and xylan after two processes of lime pretreatment and enzymatic hydrolysis. The optimal conditions of pretreatment were as follow: 1) 1.33 h, 1470C, 17.8 bar absolute, 0.26 g Ca(OH)2/g raw biomass. 2) 1.25 h, 155 0C, 21 bar absolute, 0.26 Ca(OH)2/g raw biomass. Furthermore, the optimal values for low impact factors such as water loading was 15 g/g raw biomass and particle size was less than 3 mm. The optimal conditions of enzymatic hydrolysis were as follow: Cellulase enzymeloading was 0.1 g /g glucan in raw biomass, at substrate concentration of 50 g/L during 72 h of enzymatic hydrolysis The yield of enzymatic hydrolysis under these conditions were as follow: 96.00 g glucan/100 g of glucan in raw biomass, and 65.00 g xylan/100 g xylan in raw biomass. Asem Hassan MohammedFrank Behrendt BehrendtFrank Jürgen MethnerAl-Khwarizmi College of Engineering – University of Baghdadarticlelime pretreatmentenzymatic hydrolysislignocellulosic biomasswillow woodChemical engineeringTP155-156Engineering (General). Civil engineering (General)TA1-2040ENAl-Khawarizmi Engineering Journal, Vol 12, Iss 4 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	lime pretreatment enzymatic hydrolysis lignocellulosic biomass willow wood Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040
spellingShingle	lime pretreatment enzymatic hydrolysis lignocellulosic biomass willow wood Chemical engineering TP155-156 Engineering (General). Civil engineering (General) TA1-2040 Asem Hassan Mohammed Frank Behrendt Behrendt Frank Jürgen Methner Conversion of Lignocellulosic Material Into Fermentable Sugars
description	Enzymatic hydrolysis process of lignocellulosic biomass materials is difficult because of inherent structural features of biomass, which represents barriers that prevent complete hydrolysis; therefore, pretreatment techniques are necessary to render biomass highly digestible in enzymatic hydrolysis process. In this research, (non?) oxidative short-term lime pretreatment of willow wood was used. A weight of 11.40 g of willow wood was mixed with an excess of calcium hydroxide (0.4 g Ca(OH)2/g raw biomass) and water loading (15 g/g raw biomass). Lime pretreatment was carried out for various periods of time including 1, 2, 3.5, 5 and 6 h, with temperatures at 100, 113, 130, 147 and 1600C, and oxygen pressures as oxidativeagent (6, 9, 13.5, 17.8, 21 bar absolute). The optimization of both pretreatment and enzymatic hydrolysis were depended on the maximum overall yields of glucan and xylan after two processes of lime pretreatment and enzymatic hydrolysis. The optimal conditions of pretreatment were as follow: 1) 1.33 h, 1470C, 17.8 bar absolute, 0.26 g Ca(OH)2/g raw biomass. 2) 1.25 h, 155 0C, 21 bar absolute, 0.26 Ca(OH)2/g raw biomass. Furthermore, the optimal values for low impact factors such as water loading was 15 g/g raw biomass and particle size was less than 3 mm. The optimal conditions of enzymatic hydrolysis were as follow: Cellulase enzymeloading was 0.1 g /g glucan in raw biomass, at substrate concentration of 50 g/L during 72 h of enzymatic hydrolysis The yield of enzymatic hydrolysis under these conditions were as follow: 96.00 g glucan/100 g of glucan in raw biomass, and 65.00 g xylan/100 g xylan in raw biomass.
format	article
author	Asem Hassan Mohammed Frank Behrendt Behrendt Frank Jürgen Methner
author_facet	Asem Hassan Mohammed Frank Behrendt Behrendt Frank Jürgen Methner
author_sort	Asem Hassan Mohammed
title	Conversion of Lignocellulosic Material Into Fermentable Sugars
title_short	Conversion of Lignocellulosic Material Into Fermentable Sugars
title_full	Conversion of Lignocellulosic Material Into Fermentable Sugars
title_fullStr	Conversion of Lignocellulosic Material Into Fermentable Sugars
title_full_unstemmed	Conversion of Lignocellulosic Material Into Fermentable Sugars
title_sort	conversion of lignocellulosic material into fermentable sugars
publisher	Al-Khwarizmi College of Engineering – University of Baghdad
publishDate	2017
url	https://doaj.org/article/2cbf77a7c56042f0915ef65ed1ccb80c
work_keys_str_mv	AT asemhassanmohammed conversionoflignocellulosicmaterialintofermentablesugars AT frankbehrendtbehrendt conversionoflignocellulosicmaterialintofermentablesugars AT frankjurgenmethner conversionoflignocellulosicmaterialintofermentablesugars
_version_	1718399509635006464

Conversion of Lignocellulosic Material Into Fermentable Sugars

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