Effect of sodium sulfite on acid pretreatment of wheat straw with respect to its final conversion to ethanol

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22330%2F16%3A43901669" target="_blank" >RIV/60461373:22330/16:43901669 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.biombioe.2016.08.022" target="_blank" >http://dx.doi.org/10.1016/j.biombioe.2016.08.022</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.biombioe.2016.08.022" target="_blank" >10.1016/j.biombioe.2016.08.022</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of sodium sulfite on acid pretreatment of wheat straw with respect to its final conversion to ethanol

Popis výsledku v původním jazyce

A pretreatment process that combines dilute acid and sodium sulfite has been applied to wheat straw to study the effect of temperature (120-180 oC) and sodium sulfite concentration (0- 3%) on the yield of glucose in subsequent enzymatic hydrolysis and ethanol production by fermentation. The results were compared with both dilute acid pretreatment (without Na2SO3 addition) and hot water pretreatment. Formation of furfural and hydroxymethylfurural, which can inhibit ethanol-producing microorganisms, were measured and the ethanol yield in a subsequent fermentation was evaluated. The results indicate that a combination of 180 oC, 30 min, 1% H2SO4 and 2.4% Na2SO3 during pretreatment produced the highest ethanol yield; 17.3 g/ 100 g dry weight of initial biomass, which corresponds to 75% of the theoretical yield from glucose. 28 mg of furan inhibitors (sum of furfural and hydroxymethylfurfural) per gram dry weight of initial wheat straw were generated under this condition. Increasing sulfite loading up to 2.4% decreased inhibitor formation, leading to increased delignification and preservation of cellulose from dissolution. On the other hand, an elevated temperature in combination with low pH reduced the amount of solid phase after pretreatment, increased the level of inhibitors and reduced the concentration of ethanol produced by fermentation.

Název v anglickém jazyce

Effect of sodium sulfite on acid pretreatment of wheat straw with respect to its final conversion to ethanol

Popis výsledku anglicky

A pretreatment process that combines dilute acid and sodium sulfite has been applied to wheat straw to study the effect of temperature (120-180 oC) and sodium sulfite concentration (0- 3%) on the yield of glucose in subsequent enzymatic hydrolysis and ethanol production by fermentation. The results were compared with both dilute acid pretreatment (without Na2SO3 addition) and hot water pretreatment. Formation of furfural and hydroxymethylfurural, which can inhibit ethanol-producing microorganisms, were measured and the ethanol yield in a subsequent fermentation was evaluated. The results indicate that a combination of 180 oC, 30 min, 1% H2SO4 and 2.4% Na2SO3 during pretreatment produced the highest ethanol yield; 17.3 g/ 100 g dry weight of initial biomass, which corresponds to 75% of the theoretical yield from glucose. 28 mg of furan inhibitors (sum of furfural and hydroxymethylfurfural) per gram dry weight of initial wheat straw were generated under this condition. Increasing sulfite loading up to 2.4% decreased inhibitor formation, leading to increased delignification and preservation of cellulose from dissolution. On the other hand, an elevated temperature in combination with low pH reduced the amount of solid phase after pretreatment, increased the level of inhibitors and reduced the concentration of ethanol produced by fermentation.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

EI - Biotechnologie a bionika

OECD FORD obor

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Projekt

<a href="/cs/project/TE01020080" target="_blank" >TE01020080: Centrum kompetence pro výzkum biorafinací</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Biomass &amp; Bioenergy

ISSN

0961-9534

e-ISSN

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Svazek periodika

95

Číslo periodika v rámci svazku

srpen

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

1-7

Kód UT WoS článku

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EID výsledku v databázi Scopus

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