Fiber modifications by organosolv catalyzed with H2SO4 improves the SSF of Pinus radiata

Valenzuela, Roberto; Priebe, Xenia; Troncoso, Eduardo; Ortega, Isidora; Parra, Carolina; Freer, Juanita

doi:10.1016/j.indcrop.2016.03.037

Cited by 21 publications

(14 citation statements)

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“…The treatment operating conditions may generate substrates with varying characteristics that influence the production of ethanol by the simultaneous saccharification and fermentation (SSF) process: (1) content of lignin and hemicelluloses, (2) pore volume, (3) crystallinity of cellulose, (4) distribution of residual lignin in the treated fibers, and (5) remaining arrangements between lignin and carbohydrates 4, 9, 10, 11. Opposite tendencies have been found between lignin and ethanol yield.…”

Section: Introductionmentioning

confidence: 99%

“…Pulps obtained with high concentrations of alkali, which show low lignin contents, are usually converted to ethanol in high yields [12]. On the other hand, it is also reported that pulps with relatively high lignin content can show high digestibility, attributed to the formation of lignin droplets promoted by acidic organosolv [9,10]. Most of the studies on lignocellulosic biomass fractionation and bioconversion focus either the use of sugars in hydrolysis and fermentation processes, or the isolation of lignin.…”

Section: Introductionmentioning

confidence: 99%

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Biorefining of Pinus pinaster Stump Wood for Ethanol Production and Lignin Recovery

et al. 2021

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Stump wood is a forest residue having significant valorization potential. The aims of this work were to exploit pine stumps as a carbohydrate and lignin feedstock, and to convert the carbohydrate fraction to bioethanol by simultaneous saccharification and fermentation (SSF). Pinus pinaster stump wood (PPSW) was delignified by the alkaline organosolv (AOS) process. Soda (SA) cooking was used as benchmark process. Higher pulp yields were obtained in AOS treatments, whilst SA pulp showed the highest cellulose content. In the SSF of PPSW pulps, high ethanol concentrations were obtained with high productivity and yield. AOS lignins were purer and had lower molar mass and dispersity index, which are important parameters in high‐value co‐product applications.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biorefining of Pinus pinaster Stump Wood for Ethanol Production and Lignin Recovery

et al. 2021

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“…2(f)), indicating that the compact structure was disrupted. The particles depositions might be due to the re-precipitation of dissolved lignin and the formation of "pseudolignin", as the other researchers reported [6,18,37,38]. Moreover, different from the other pretreatments, the structure after EtOH/H2O/H2SO4 was destroyed into fragments, which was beneficial to enzymatic hydrolysis.…”

Section: Surface Morphology Of Sawdust After Pretreatmentsmentioning

confidence: 94%

Enhanced Enzymatic Saccharification of Mixed Sawdust Wastes: Comparison of SPORL, Dilute Acid, Formic Acid, and Ethanol Organosolv Pretreatments

et al. 2021

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Abstract. Utilization of the huge quantity of sawdust wastes is urgent. In this study, SPORL, dilute acid pretreatment (DA), formic acid pretreatment (FA), ethanol pretreatment (EtOH/H2O), and sulfuric acid catalyzed ethanol pretreatment (EtOH/H2O/H2SO4), on improving enzymatic hydrolysis of mixed sawdust wastes were comprehensively compared. EtOH/H2O/H2SO4 was the most effective pretreatment in lignin removal from sawdust fiber cell wall, while FA was much more effective in hemicellulose removal. After the pretreatments, the crystallinity of cellulose increased because of the removal of amorphous hemicellulose and lignin. Moreover, the fiber surface became coarse and porous, especially after EtOH/H2O/H2SO4, the structure was destroyed into fragments, which enhanced the cellulase accessibility of cellulose. Therefore, the glucose yield of EtOH/H2O/H2SO4 pretreated substrate was highest among these five pretreatments, achieved at 91.4% with a cellulase loading of only 10 FPU/g glucan. Resumen. Es urgente aprovechar la gran cantidad de residuos de aserrín. En este estudio, SPORL, pretratamiento con ácido diluido (DA), pretratamiento con ácido fórmico (FA), pretratamiento con etanol (EtOH/H2O) y pretratamiento con etanol catalizado con ácido sulfúrico (EtOH/H2O/H2SO4), sobre la mejora de la hidrólisis enzimática de residuos de aserrín mezclado fueron comparados de manera integral. EtOH/H2O/H2SO4 fue el pretratamiento más eficaz para eliminar la lignina de la pared celular de la fibra de aserrín, mientras que el FA fue mucho más eficaz para eliminar la hemicelulosa. Después de los pretratamientos, la cristalinidad de la celulosa aumentó debido a la eliminación de hemicelulosa amorfa y lignina. Además, la superficie de la fibra se volvió gruesa y porosa, especialmente después de EtOH/H2O/H2SO4, la estructura se destruyó en fragmentos, lo que mejoró la accesibilidad de celulasa de la celulosa. Por lo tanto, el rendimiento de glucosa del sustrato pretratado con EtOH/H2O/H2SO4 fue el más alto entre estos cinco pretratamientos, alcanzado al 91,4% con una carga de celulasa de solo 10 FPU / g de glucano.

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“…1 (Kojima et al, 2014;Antes and Joutsimo, 2015;Neiva et al, 2015;Zhou et al, 2015;Gallina et al, 2016;Hou et al, 2016;Pinto et al, 2016;Poletto, 2016) 2 (Ataç and Eroǧlu, 2013;Gulsoy and Tufek, 2013;Xiang and He, 2013;Cotana et al, 2014;Herrera et al, 2014;Castillo et al, 2015;Gulsoy and Ozturk, 2015;Reyes et al, 2016;Valenzuela et al, 2016) Gambar 3. (Sixta, 2008).…”

Section: Rendemen Pulp Belum Putih Bambu Dekortikasimentioning

confidence: 99%

Pembuatan dan Karakterisasi Dissolving Pulp Serat Panjang dari Bambu Duri (Bambusa blumeana)

Purwita

Sugesty

2018

J selulosa

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Preparation and Characterization of Long Fiber Dissolving Pulp from Spiny Bamboo (Bambusa blumeana)The need for long fiber dissolving pulp in Indonesia can only be met from imports. Bamboo is a nonwood plant and known as source of long fiber. This research aims to study the potential of spiny bamboo to be used as raw material for producing long fiber dissolving pulp. This research was conducted using two different types of raw materials preparation to produce bamboo chip and decorticated bamboo. The pulping process is carried out by pre-hydrolysis kraft and bleaching performed with two different bleaching sequences, i.e Do ED1 D2 and Do EpD1 D2 . Based on the experimental results, spiny bamboo has good potential to be used as raw material for dissolving pulp. Spiny bamboo belongs to long fibers with an average fiber length of 2.46 mm. The dissolving quality depends on the preparation of the raw material and the bleaching sequence. The yield of spiny bamboo dissolving pulp ranged from 37.97 - 40.76% with alpha cellulose content of 94.88 - 98.67%, and viscosity of 16.43 - 25.75 cP. Decorticated bamboo with bleaching sequence of Do EpD1 D2 produced the highest quality of dissolving pulp with the highest brightness and alpha cellulose were 89.61% ISO and 98.67%, respectively.AbstrakKebutuhan dissolving pulp serat panjang di Indonesia hanya dapat dipenuhi melalui impor. Bambu adalah tanaman nonkayu dan dikenal sebagai sumber serat panjang. Penelitian ini bertujuan untuk mempelajari potensi bambu duri untuk dijadikan bahan baku pembuatan dissolving pulp serat panjang. Penelitian ini dilakukan dengan dua jenis persiapan bahan baku yang berbeda untuk menghasilkan serpih bambu dan bambu dekortikasi. Proses pemasakan dilakukan dengan proses pra-hidrolisis kraft dan pemutihan dilakukan dengan dua urutan pemutihan yang berbeda, yaitu DoED1D2 dan DoEpD1D2. Berdasarkan hasil penelitian, bambu duri memiliki potensi yang baik untuk digunakan sebagai bahan baku pembuatan dissolving pulp. Bambu duri tergolong serat panjang dengan panjang serat rata-rata 2,46 mm. Kualitas dissolving pup yang dihasilkan tergantung dari persiapan bahan baku dan urutan pemutihan. Rendemen dissolving pulp bambu duri berkisar 37,97 - 40,76%, dengan kandungan selulosa alfa 94,88 - 98,67%, dan viskositas 16,43 - 25,75 cP. Bambu dekortikasi dengan urutan pemutihan DoEpD1D2 menghasilkan dissolving pulp paling unggul dengan derajat cerah dan selulosa alfa tertinggi berturut-turut 89,61 %ISO dan 98,67%.Kata kunci: dissolving pulp, bambu duri (Bambusa blumeana), serpih bambu, bambu dekortikasi, prahidrolisis kraft

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Fiber modifications by organosolv catalyzed with H2SO4 improves the SSF of Pinus radiata

Cited by 21 publications

References 58 publications

Biorefining of Pinus pinaster Stump Wood for Ethanol Production and Lignin Recovery

Biorefining of Pinus pinaster Stump Wood for Ethanol Production and Lignin Recovery

Enhanced Enzymatic Saccharification of Mixed Sawdust Wastes: Comparison of SPORL, Dilute Acid, Formic Acid, and Ethanol Organosolv Pretreatments

Pembuatan dan Karakterisasi Dissolving Pulp Serat Panjang dari Bambu Duri (Bambusa blumeana)

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