Cellulosic Bioethanol from Industrial Eucalyptus globulus Bark Residues Using Kraft Pulping as a Pretreatment

The pulp and paper industry faces an emerging challenge for valorising wastes and side-streams generated according to the biorefinery concept. Eucalyptus globulus bark, an abundant industrial residue in the Portuguese pulp and paper sector, has a high potential to be converted into biobased products instead of being burned. This work aimed to evaluate the ethanol production from E. globulus bark previously submitted to kraft pulping through separate hydrolysis and fermentation (SHF) configuration. Fed-batch enzymatic hydrolysis provided a concentrated hydrolysate with 161.6 g·L−1 of cellulosic sugars. S. cerevisiae and Ethanol Red® strains demonstrated a very good fermentation performance, despite a negligible xylose consumption. S. passalidarum, a yeast known for its capability to consume pentoses, was studied in a simultaneous co-culture with Ethanol Red®. However, bioethanol production was not improved. The best fermentation performance was achieved by Ethanol Red®, which provided a maximum ethanol concentration near 50 g·L−1 and fermentation efficiency of 80%. Concluding, kraft pulp from E. globulus bark showed a high potential to be converted into cellulosic bioethanol, being susceptible to implementing an integrated biorefinery on the pulp and paper industrial plants.

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Co-cooking nonwoods with hardwoods

TAPPI Journal ◽

10.32964/tj13.6.19 ◽

2014 ◽

Vol 13 (6) ◽

pp. 19-24

Author(s):

TROY RUNGE ◽

CHUNHUI ZHANG

Keyword(s):

High Performance Liquid Chromatography ◽

High Performance ◽

Paper Industry ◽

Pulp And Paper Industry ◽

Strength Properties ◽

Agricultural Residues ◽

Kraft Pulping ◽

Pulp And Paper ◽

Strength Increase ◽

Xylan Content

Agricultural residues and energy crops are promising resources that can be utilized in the pulp and paper industry. This study examines the potential of co-cooking nonwood materials with hardwoods as means to incorporate nonwood material into a paper furnish. Specifically, miscanthus, switchgrass, and corn stover were substituted for poplar hardwood chips in the amounts of 10 wt %, 20 wt %, and 30 wt %, and the blends were subjected to kraft pulping experiments. The pulps were then bleached with an OD(EP)D sequence and then refined and formed into handsheets to characterize their physical properties. Surprisingly, all three co-cooked pulps showed improved strength properties (up to 35%). Sugar measurement of the pulps by high-performance liquid chromatography suggested that the strength increase correlated with enriched xylan content.

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Lignin chemistry and topochemistry during kraft delignification of Eucalyptus globulus genotypes with contrasting pulpwood characteristics

Holzforschung ◽

10.1515/hf-2013-0190 ◽

2014 ◽

Vol 68 (6) ◽

pp. 623-629 ◽

Cited By ~ 7

Author(s):

María Graciela Aguayo ◽

André Ferraz ◽

Juan Pedro Elissetche ◽

Fernando Masarin ◽

Regis Teixeira Mendonça

Keyword(s):

Chemical Composition ◽

Eucalyptus Globulus ◽

Lignin Content ◽

Middle Lamella ◽

Kraft Pulping ◽

Pulp And Paper ◽

Wood Chips ◽

Short Fibre ◽

Paper Production ◽

Cell Corner

Abstract Eucalyptus globulus Labill. is a short-fibre resource for pulp and paper production. Ten different E. globulus genotypes with varied pulpwood quality and chemical composition were evaluated under kraft pulping conditions. Characterisation of the wood and pulp samples by thioacidolysis indicated that the content of syringyl units in β-O-4 linkages (S-β-O-4) was distinct for the studied genotypes. The highest S-β-O-4 levels were detected in the samples with the lowest original lignin and highest glucan levels. This group of samples provided the pulps with the lowest final lignin content at higher yields. UV microspectrophotometric (UMSP) evaluation of the wood chips revealed that the samples with the lowest lignin levels have the lowest UV absorbances at 278 nm (A278 nm) in the secondary walls (S2). During kraft pulping, lignin from the S2 was dissolved, whereas lignins from the middle lamella and cell corner lignin was not removed not even for prolonged reaction periods, independently of the evaluated genotype. The A278 nm values of the S2 were significantly lower in the pulps from the genotypes with less original lignin content.

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Characterization and evaluation of potential impacts in the environment of residual fiber from cellulose

Revista Eletrônica em Gestão Educação e Tecnologia Ambiental ◽

10.5902/2236117038529 ◽

2019 ◽

Vol 23 ◽

pp. 7

Author(s):

Alvaro João Zonta Neto ◽

Mariana Gomes Oliveira ◽

Everton Skoronski ◽

Maurício Vicente Alves

Keyword(s):

Low Cost ◽

Paper Industry ◽

Treatment Plant ◽

Cellulose Fiber ◽

Kraft Pulping ◽

Pulp And Paper ◽

Final Destination ◽

Cellulose Pulp ◽

Reducing Costs ◽

Final Residue

The search for alternative final destinations for residue from industrial processes is a growing problem. Pulp and paper industries generate large amounts of residue, which are not always reused or do not receive adequate final destination. An alternative is its reuse, using the final disposal of the residue in the soil, for its potential to inactivate part of the chemical compounds, allowing its use as agricultural inputs of low cost. The purpose of this study was to analyze the final residue of the treatment plant of a pulp and paper industry using the kraft pulping method, which allows a high resistance and low lignin cellulose pulp with the advantage of recovering the chemicals used, reducing costs. In order to pre-evaluate this disposal possibility, this study carried out the classification of the waste classifying the hazardousness of the cellulose fiber, and its behavior under solubilization and leaching tests. The results of the analysis showed that the reactivity characteristics and solubilization of substances in water above the maximum permissible value (MPV), characterizing the residue as non-inert and Hazardous Class I due to the presence of S2- releasing H2S in concentrations above than those established by the regulations.

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Cellulose pulp produced from bulrush fiber

Ciência Rural ◽

10.1590/0103-8478cr20160652 ◽

2017 ◽

Vol 47 (5) ◽

Cited By ~ 1

Author(s):

Vania Karine Dick Wille ◽

Cristiane Pedrazzi ◽

Jorge Luiz Colodette ◽

Rubens Chaves de Oliveira ◽

Rodrigo Coldebella ◽

...

Keyword(s):

Paper Industry ◽

Short Fiber ◽

Kraft Pulping ◽

Pulp And Paper ◽

Raw Material ◽

Wood Fibers ◽

Material Source ◽

Pulp Industry ◽

Cellulose Pulp ◽

Cellulosic Pulp

ABSTRACT: Brazil continues to use wood as the principal raw material source for the pulp industry; although, non-wood fibers have been revealed to be a competent substitute to produce paper with different and exceptional properties. Keeping this in focus, this study aimed to assess potential of Schoenoplectus californicus fibers (C. A. Mey.) Soják, commonly identified as bulrush or reed, in cellulosic pulp generation, as an alternative fiber source for the pulp and paper industry. On analyzing the chemical composition of reed fibers, extractives of lignin, carbohydrates, uronic acids and minerals were reported. Physico-chemical characteristics of reed-based cellulosic pulp were estimated including viscosity, hexenuronic acids, etc., as well as anatomical features of length, width, etc. From the chemical analyses of the reed the presence of high concentrations of extractives and silica was clear, making them unfit as raw material for cellulosic pulp production. Pulp kraft pulping process produced brown pulps low in viscosity (34.5m Pa.s) and hexenuronic acid content. Reed is thus classifiable as short-fiber source for pulp and paper industries.

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Microsatellite analysis of population structure in Eucalyptus globulus

Genome ◽

10.1139/gen-2016-0218 ◽

2017 ◽

Vol 60 (9) ◽

pp. 770-777

Author(s):

Joana Costa ◽

René E. Vaillancourt ◽

Dorothy A. Steane ◽

Rebecca C. Jones ◽

Cristina Marques

Keyword(s):

Population Structure ◽

Eucalyptus Globulus ◽

Natural Variation ◽

Paper Industry ◽

Pulp And Paper Industry ◽

Microsatellite Analysis ◽

Pulp And Paper ◽

Molecular Studies ◽

Native Diversity ◽

Blue Gum

Eucalyptus globulus subsp. globulus Labill. (Tasmanian Blue Gum), native to southeast Australia, is a benchmark species for the pulp and paper industry. We genotyped 397 trees from 16 populations of E. globulus representing the native diversity in Australia using 24 microsatellite loci. Eight genetically distinct groups were detected, consistent with genetic groupings detected in previous quantitative and molecular studies. A sample of 29 Portuguese individuals was added to help clarify the origin of the Portuguese landrace. The results suggest a southern and eastern Tasmania origin for the Portuguese landrace. This genetic framework will enable researchers to investigate the provenance of individuals of unknown pedigree and assess the levels of representation of E. globulus natural variation in the Portuguese landrace.

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