Ionic liquid pretreatment of stinging nettle stems and giant miscanthus for bioethanol production

Abstract Production of ethanol from lignocellulosic biomass is considered the most promising proposition for developing a sustainable and carbon–neutral energy system. The use of renewable raw materials and variability of lignocellulosic feedstock generating hexose and pentose sugars also brings adv...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Małgorzata Smuga-Kogut, Daria Szymanowska-Powałowska, Roksana Markiewicz, Tomasz Piskier, Tomasz Kogut
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b0f3ab59346c4e81adfb80dcf3e7a320
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:b0f3ab59346c4e81adfb80dcf3e7a320
record_format	dspace
spelling	oai:doaj.org-article:b0f3ab59346c4e81adfb80dcf3e7a3202021-12-02T15:31:36ZIonic liquid pretreatment of stinging nettle stems and giant miscanthus for bioethanol production10.1038/s41598-021-97993-y2045-2322https://doaj.org/article/b0f3ab59346c4e81adfb80dcf3e7a3202021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97993-yhttps://doaj.org/toc/2045-2322Abstract Production of ethanol from lignocellulosic biomass is considered the most promising proposition for developing a sustainable and carbon–neutral energy system. The use of renewable raw materials and variability of lignocellulosic feedstock generating hexose and pentose sugars also brings advantages of the most abundant, sustainable and non-food competitive biomass. Great attention is now paid to agricultural wastes and overgrowing plants as an alternative to fast-growing energetic crops. The presented study explores the use of stinging nettle stems, which have not been treated as a source of bioethanol. Apart from being considered a weed, stinging nettle is used in pharmacy or cosmetics, yet its stems are always a non-edible waste. Therefore, the aim was to evaluate the effectiveness of pretreatment using imidazolium- and ammonium-based ionic liquids, enzymatic hydrolysis, fermentation of stinging nettle stems, and comparison of such a process with giant miscanthus. Raw and ionic liquid-pretreated feedstocks of stinging nettle and miscanthus were subjected to compositional analysis and scanning electron microscopy to determine the pretreatment effect. Next, the same conditions of enzymatic hydrolysis and fermentation were applied to both crops to explore the stinging nettle stems potential in the area of bioethanol production. The study showed that the pretreatment of both stinging nettle and miscanthus with imidazolium acetates allowed for increased availability of the critical lignocellulosic fraction. The use of 1-butyl-3-methylimidazolium acetate in the pretreatment of stinging nettle allowed to obtain very high ethanol concentrations of 7.3 g L−1, with 7.0 g L−1 achieved for miscanthus. Results similar for both plants were obtained for 1-ethyl-3-buthylimidazolium acetate. Moreover, in the case of ammonium ionic liquids, even though they have comparable potential to dissolve cellulose, it was impossible to depolymerize lignocellulose and extract lignin. Furthermore, they did not improve the efficiency of the hydrolysis process, which in turn led to low alcohol concentration. Overall, from the presented results, it can be assumed that the stinging nettle stems are a very promising bioenergy crop.Małgorzata Smuga-KogutDaria Szymanowska-PowałowskaRoksana MarkiewiczTomasz PiskierTomasz KogutNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Małgorzata Smuga-Kogut Daria Szymanowska-Powałowska Roksana Markiewicz Tomasz Piskier Tomasz Kogut Ionic liquid pretreatment of stinging nettle stems and giant miscanthus for bioethanol production
description	Abstract Production of ethanol from lignocellulosic biomass is considered the most promising proposition for developing a sustainable and carbon–neutral energy system. The use of renewable raw materials and variability of lignocellulosic feedstock generating hexose and pentose sugars also brings advantages of the most abundant, sustainable and non-food competitive biomass. Great attention is now paid to agricultural wastes and overgrowing plants as an alternative to fast-growing energetic crops. The presented study explores the use of stinging nettle stems, which have not been treated as a source of bioethanol. Apart from being considered a weed, stinging nettle is used in pharmacy or cosmetics, yet its stems are always a non-edible waste. Therefore, the aim was to evaluate the effectiveness of pretreatment using imidazolium- and ammonium-based ionic liquids, enzymatic hydrolysis, fermentation of stinging nettle stems, and comparison of such a process with giant miscanthus. Raw and ionic liquid-pretreated feedstocks of stinging nettle and miscanthus were subjected to compositional analysis and scanning electron microscopy to determine the pretreatment effect. Next, the same conditions of enzymatic hydrolysis and fermentation were applied to both crops to explore the stinging nettle stems potential in the area of bioethanol production. The study showed that the pretreatment of both stinging nettle and miscanthus with imidazolium acetates allowed for increased availability of the critical lignocellulosic fraction. The use of 1-butyl-3-methylimidazolium acetate in the pretreatment of stinging nettle allowed to obtain very high ethanol concentrations of 7.3 g L−1, with 7.0 g L−1 achieved for miscanthus. Results similar for both plants were obtained for 1-ethyl-3-buthylimidazolium acetate. Moreover, in the case of ammonium ionic liquids, even though they have comparable potential to dissolve cellulose, it was impossible to depolymerize lignocellulose and extract lignin. Furthermore, they did not improve the efficiency of the hydrolysis process, which in turn led to low alcohol concentration. Overall, from the presented results, it can be assumed that the stinging nettle stems are a very promising bioenergy crop.
format	article
author	Małgorzata Smuga-Kogut Daria Szymanowska-Powałowska Roksana Markiewicz Tomasz Piskier Tomasz Kogut
author_facet	Małgorzata Smuga-Kogut Daria Szymanowska-Powałowska Roksana Markiewicz Tomasz Piskier Tomasz Kogut
author_sort	Małgorzata Smuga-Kogut
title	Ionic liquid pretreatment of stinging nettle stems and giant miscanthus for bioethanol production
title_short	Ionic liquid pretreatment of stinging nettle stems and giant miscanthus for bioethanol production
title_full	Ionic liquid pretreatment of stinging nettle stems and giant miscanthus for bioethanol production
title_fullStr	Ionic liquid pretreatment of stinging nettle stems and giant miscanthus for bioethanol production
title_full_unstemmed	Ionic liquid pretreatment of stinging nettle stems and giant miscanthus for bioethanol production
title_sort	ionic liquid pretreatment of stinging nettle stems and giant miscanthus for bioethanol production
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/b0f3ab59346c4e81adfb80dcf3e7a320
work_keys_str_mv	AT małgorzatasmugakogut ionicliquidpretreatmentofstingingnettlestemsandgiantmiscanthusforbioethanolproduction AT dariaszymanowskapowałowska ionicliquidpretreatmentofstingingnettlestemsandgiantmiscanthusforbioethanolproduction AT roksanamarkiewicz ionicliquidpretreatmentofstingingnettlestemsandgiantmiscanthusforbioethanolproduction AT tomaszpiskier ionicliquidpretreatmentofstingingnettlestemsandgiantmiscanthusforbioethanolproduction AT tomaszkogut ionicliquidpretreatmentofstingingnettlestemsandgiantmiscanthusforbioethanolproduction
_version_	1718387162650509312

Ionic liquid pretreatment of stinging nettle stems and giant miscanthus for bioethanol production

Ejemplares similares