Structural analysis for lignin characteristics in biomass straw

Ghaffar, Seyed Hamidreza; Fan, Mizi

doi:10.1016/j.biombioe.2013.07.015

Cited by 244 publications

(123 citation statements)

References 122 publications

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“…Lignin is composed of three common phenylpropane structures including phydroxyphenyl (H), syringyl (S), and guaiacyl (G) units, which are linked to polysaccharides (hemicelluloses) via various covalent bonds (Ghaffar and Fan 2013). Lignin acts as a matrix together with hemicelluloses for the cellulose microfibrils (Ghaffar and Fan 2013).…”

Section: Fermentation Losses Of Rape Straw After Incubation With Fungimentioning

confidence: 99%

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Effect of Fungal Treatments of Rape Straw on Chemical Composition and in vitro Rumen Fermentation Characteristics

Zhao¹,

Gong²,

Zhou³

et al. 2014

BioResources

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The use of rape straw in ruminant production is limited by its high lignin content and low ruminal degradability. White rot fungi are the most efficient known degraders of lignin. Four white rot fungi were investigated for their potential to degrade lignin and improve rumen fermentation of rape straw. Solid state fermentation of the straw was carried out for 0 to 30 days to determine changes in chemical composition and in vitro rumen fermentation. Results showed that Phanerochaete chrysosporium and Lentinula edodes degraded about 45% of lignin and enhanced the in vitro organic matter digestibility (IVOMD) and volatile fatty acid production; however, about 55% of the cellulose was lost after 30 days of incubation. Ceriporiopsis subvermispora and Phlebia acerina degraded a fraction (< 30%) of lignin and cellulose, but inhibited ruminal fermentation. Fungal incubation increased the chitin content of rape straw. Regression analysis showed that the IVOMD increase depended on the combined action of neutral detergent fiber loss and chitin content increase in rape straw. This study indicates that considerations of the conversion of rape straw into ruminant feed with white-rot fungi should take into account the degradation of lignin, fiber loss, and the chitin produced along with the growth of fungi.

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Section: Fermentation Losses Of Rape Straw After Incubation With Fungimentioning

confidence: 99%

“…Lignin acts as a matrix together with hemicelluloses for the cellulose microfibrils (Ghaffar and Fan 2013). However, the structure of lignin is amorphous and can considerably differ among biomass species.…”

Section: Fermentation Losses Of Rape Straw After Incubation With Fungimentioning

confidence: 99%

Effect of Fungal Treatments of Rape Straw on Chemical Composition and in vitro Rumen Fermentation Characteristics

Zhao¹,

Gong²,

Zhou³

et al. 2014

BioResources

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“…Both spectra of N-EFB and Gly-EFB have peaks at 3372 and 3332 cm -1 indicating the alcoholic and phenolic OHgroups related to hydrogen bond [23]. Absent of C-H stretching peak was clearly shown in the spectrum for N-EFB.…”

Section: Figurementioning

confidence: 91%

Lignin recovery from alkaline hydrolysis and glycerolysis of oil palm fiber

Hassan

Badri

2014

AIP Conference Proceedings

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Abstract. In the present work, two types of treatment namely alkaline hydrolysis and glycerolysis have been conducted for lignin extraction from oil palm empty fruit bunch (EFB) fiber. Lignin has been retrieved from two sequential methods, which was the klason lignin from residue and lignin from precipitation of the filtrate. Alkaline hydrolysis was performed using 10% NaOH solution at room condition. This has extracted 13.0 % lignin. On the other hand, glycerolysis was carried out using 70% glycerol catalyzed with 5% of 1 M NaOH at 60-70 °C. This has successfully extracted 16.0% lignin. The SEM micrographs exhibited some physical changes on the surface where the impurities and waxes have been removed, exposing the,lumen. Besides that, FTIR analysis was conducted on untreated EFB, treated EFB and extracted lignin. Delignification of EFB fiber was confirmed based on the intensity reduction at 1245 cm -1 that showed lignin was removed from the fiber. The presence of C=O, C=C and C=C aromatic peaks in the FTIR spectra of the dried filtrate gave an evidence on the presence of lignin.

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“…The degradation of the straw causes a reduction in the peak size at 1606, 1514 and 1422 cm −1 , which corresponds to vibrations in aromatic rings, which are present only in lignin. 41,42 The difference at 1422 cm −1 can also be attributed to the methylene (CH 2 ) scissoring motions in cellulose. 43 The reduction The peaks at 897 (characteristic of b-glycosidic linkages between sugar units), 1025 and 1156 cm −1 represent C-O-C pyranose ring skeletal and C-O stretching and deformation in cellulose and hemicelluloses.…”

Section: Study Of the Changes In Wheat Straw Fibresmentioning

confidence: 99%

Biodegradation as natural fibre pre-treatment in composite manufacturing

et al. 2016

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Bacterial and fungal degradation of wheat straw has become intensively scrutinised in recent years because of the growing interest in procuring useful feedstocks and chemicals from lignocellulosic sources. Typically, after the extraction of valuable sugars and phenolics, significant quantities of solid biomass remain as waste. In this work, it has been shown that the leftover fermented wheat straw can be successfully used to reinforce epoxy resins, providing better strength properties compared to non-degraded straw. A 12% and a 22% increase in Young's modulus and ultimate tensile strength respectively were observed for degraded wheat straw/epoxy composites compared to composites containing non-degraded straw. The improvement in mechanical strength is explained in terms of the structural and morphological transformations that occurred in the fibres during the fermentation process.The opportunity to use degraded natural fibres in the manufacturing of composites, in addition to the production of chemicals from lignocellulosic feedstocks, looks promising for improving biorefinery economics further.

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Structural analysis for lignin characteristics in biomass straw

Cited by 244 publications

References 122 publications

Effect of Fungal Treatments of Rape Straw on Chemical Composition and in vitro Rumen Fermentation Characteristics

Effect of Fungal Treatments of Rape Straw on Chemical Composition and in vitro Rumen Fermentation Characteristics

Lignin recovery from alkaline hydrolysis and glycerolysis of oil palm fiber

Biodegradation as natural fibre pre-treatment in composite manufacturing

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