Article
Agricultural Engineering
Patricia Henriques, Marta Martinho, Maria de Lurdes Serrano, Antonio P. Mendes de Sousa, Ana Maria Brites Alves
Summary: Xylooligosaccharides (XOS) are emerging prebiotics with various benefits for physical and mental health. In this study, bleached kraft pulp from Eucalyptus globulus was used as a lignin-free material for XOS production. Through alkaline extraction and acid hydrolysis, a maximum conversion rate of xylan to XOS of 30.2% was achieved under specific conditions, with xylobiose and xylotriose prevailing as products.
INDUSTRIAL CROPS AND PRODUCTS
(2021)
Article
Chemistry, Applied
Andrea Vera-Loor, Panagiota Rigou, Nathalie Marlin, Gerard Mortha, Alain Dufresne
Summary: Microfibrillated cellulose (MFC) is a promising cellulosic material that has shown great potential in various industries. However, there is still a need to improve its processing techniques to increase production volumes and reduce costs.
CARBOHYDRATE POLYMERS
(2022)
Article
Materials Science, Paper & Wood
Min Luo, Shenlong Tian, Xingyu Lan, Shiyu Fu
Summary: This study investigated the release or degradation behavior of glycosylated side-chain of hemicellulose during alkaline cooking. The results showed that the harsher cooking conditions and extraction temperature significantly influenced the composition and structure of hemicellulose, leading to more glycosyl side chains removal.
Article
Biochemistry & Molecular Biology
Andrea Vera-Loor, Panagiota Rigou, Gerard Mortha, Nathalie Marlin
Summary: This study examines the conversion of paper-grade bleached Kraft pulp into dissolving pulp using eco-friendly chemicals. Two oxidation systems are evaluated and the periodate-peroxide system is found to be more efficient in removing hemicelluloses and improving the pulp's dissolving ability.
Article
Forestry
Megersa Bedo Megra, Rakesh Kumar Bachheti, Mesfin Getachew Tadesse, Limenew Abate Worku
Summary: As the global population increases, there is a growing demand for additional pulpwood for paper production. This study evaluated the characteristics of Melia azedarach as a raw material for pulp and papermaking, and found it to be suitable for the industry.
Article
Energy & Fuels
Ghochapon Mongkhonsiri, Amata Anantpinijwatna, Pongtorn Charoensuppanimit, Amornchai Arpornwichanop, Rafiqul Gani, Suttichai Assabumrungrat
Summary: This study explores the integration of the biorefinery concept into the Kraft pulping process to achieve sustainability goals. By investigating various scenarios, it is found that Scenario II has the best economic performance, while Scenario III excels in energy efficiency and environmental performance.
CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION
(2021)
Article
Materials Science, Paper & Wood
Ines S. F. Mendes, Antonio Prates, Dmitry V. Evtuguin
Summary: This study evaluated the conversion of Eucalyptus globulus glucuronoxylan (GX) during the acidic Mg-base acid sulphite pulping of hardwood dissolving pulp. The study revealed the kinetics of GX degradation and structural changes during pulping. It was found that a significant portion of xylan was removed in the heating-up step, and the removal of residual GX from pulp was hindered by its entrapment in cellulose fibril aggregates. The dynamics of xylan deacetylation and depolymerization during pulping were also determined.
Article
Biochemistry & Molecular Biology
Jiangdong Yu, Xuewen Xu, Chen Miao, Penghui Li, Guolin Tong
Summary: This study analyzed the effect of lignin side chain spatial configuration on cooking performance and compared the structural characteristics of eucalyptus and acacia during cooking using ozonation, GC-MS, NBO, and 2D NMR techniques. The changes in lignin content during the cooking process were studied for four different raw materials using ball milling and UV spectrum analysis. The results showed a continuous decrease in lignin content during cooking, with stability reached only in the late cooking stage. The E/T and S/G ratios of residual lignin followed a similar trend. Different raw materials exhibited variations in cooking efficiency and transformation rules during the cooking process, suggesting the potential for improving pulping efficiency through different technological means.
Article
Engineering, Environmental
Patricia I. A. Henriques, Maria de Lurdes S. Serrano, Antonio P. Mendes de Sousa, Ana Maria F. Brites Alves
Summary: Xylooligosaccharides (XOS) with prebiotic properties were produced through a green enzymatic hydrolysis process on an intermediate product from a pulp and paper industry. The use of water as a reaction medium instead of buffer solution did not affect the production of XOS. The optimized conditions resulted in a high yield of XOS.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2023)
Article
Materials Science, Textiles
Somwang Khantayanuwong, Piyawan Yimlamai, Korawit Chitbanyong, Kapphapaphim Wanitpinyo, Sawitree Pisutpiched, Sarawood Sungkaew, Prakit Sukyai, Buapan Puangsin
Summary: The microstructural, morphological, chemical, pulp, and paper properties of four fast growing Thai bamboo species were characterized. It was found that the chemical composition of the bamboo species was similar, with long and rigid fibers. The pulp yield was high and the paper strength improved with increasing beating time. These properties indicate a great potential for these bamboo species in pulp and paper production.
JOURNAL OF NATURAL FIBERS
(2023)
Article
Materials Science, Paper & Wood
Yali Liu, Sufeng Zhang, Lei Li, Sergiu Coseri
Summary: A few-chemical, low-energy process for the direct extraction of cellulose nanofibers (CNFs) from unbleached kraft pulp (UBKP) by potassium permanganate oxidation is proposed in this work. The residual lignin and hemicellulose in the pulp are converted into active components during the oxidation process, promoting defibrillation. The activated residual lignin significantly improves the UBCNF properties, especially the tensile strength of the UBCNF films. Moreover, the UBCNFs show great potential as an eco-friendly paper strengthening agent with remarkable enhancement in various properties.
Article
Forestry
Ana Henriques, Dmitry V. Evtuguin
Summary: The effect of active alkali charge on the properties of tissue paper from Eucalyptus wood chips was evaluated. Changes in active alkali levels during cooking affected the chemical composition, intrinsic viscosity, and fiber morphology of the pulps, thereby influencing the properties of laboratory-produced tissue papers. Higher active alkali led to softer paper with lower tensile strength, but not significantly improved absorptivity, potentially due to lower water retention in pulps from higher active alkali cooking.
Article
Chemistry, Applied
Cynthia Hopson, Victoria Rigual, M. Virginia Alonso, Mercedes Oliet, Francisco Rodriguez
Summary: 3D printing is a promising technology for fabricating cost-effective and customizable objects. Research on bio-based inks with recyclable and eco-friendly properties is increasing due to the need to substitute fossil fuels as raw materials. In this study, ionogels and hydrogels were formulated for 3D printing using cellulose dissolved in [Emim] [DMP] at different concentrations. Rheological properties and printability were compared with a commercial ink, and the 4 wt% ink was found to have the best print resolution and fidelity. These 3D printed cellulose ionogels and hydrogels may have applications in the electrochemical and medical fields, respectively.
CARBOHYDRATE POLYMERS
(2023)
Article
Materials Science, Paper & Wood
Sofia M. Rebola, Catarina A. Azevedo, Dmitry V. Evtuguin
Summary: A series of Eucalyptus globulus kraft pulps were cooked and bleached under different active alkali charges, leading to varying absorption capacities and fibre network strengths. Factors affecting absorption capacity include knot content, fibre hydrophilicity, morphology, and water retention capacity. The fibre network strength was found to increase with cooking AA, with TCF fluff pulps showing greater strength compared to ECF pulps.
Article
Materials Science, Paper & Wood
Laxman Kumar Pandey, Amit Kumar, Surendra Pal Singh, Dharm Dutt
Summary: The study focused on combined mechanical and xylanase treatment of wood chips, resulting in a reduction in cooking temperature by 20 degrees C and improvement in pulp brightness and physical strength properties.
Article
Energy & Fuels
C. Pengilly, M. Garcia-Aparicio, J. P. J. Swart, J. F. Gorgens
Summary: This study developed a micro-assay method to reproducibly allocate pretreated lignocellulosic biomass at milligram scale while minimizing the impact on digestibility. The combination of disintegrator and liquidiser treatments improved homogenization and fiber size distribution in hand-sheets, achieving the desired fiber lengths. The micro-assay method could differentiate between enzyme combinations and identify those resulting in higher sugar yields from different pretreated lignocellulose materials.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Energy & Fuels
Jefferson Poles Felipuci, Alison Andrei Schmatz, Derlene Attili de Angelis, Michel Brienzo
Summary: A combination of chemical and biological treatment was used to solubilize xylan, reducing the amount of chemicals required. The study found that the biological pretreatment changed the structure of sugarcane bagasse, reducing its recalcitrance and allowing for a higher solubilization of xylan.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Biotechnology & Applied Microbiology
Bianca A. Brandt, Maria P. Garcia-Aparicio, Johann F. Gorgens, Willem H. van Zyl
Summary: The study enhanced inhibitor resistance phenotypes of xylose-capable Saccharomyces cerevisiae strains by rational engineering and adaptation in concentrated hardwood SSL, and evaluated them in fermentations under industrially relevant conditions. Adapted strains showed improved ethanol yields and inhibitor resistance, but exhibited a trade-off between resistance and ethanol productivity.
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
(2022)
Article
Energy & Fuels
Alison Andrei Schmatz, Fernando Masarin, Michel Brienzo
Summary: This study aimed to improve lignin removal in biomass pretreatment by evaluating the effect of additives. Antioxidants and surfactants enhanced lignin removal, facilitating cellulose hydrolysis. The use of chemical compounds during pretreatment benefitted lignin removal and consequently cellulose hydrolysis.
BIOENERGY RESEARCH
(2022)
Article
Energy & Fuels
Beatriz Salustiano Pereira, Caroline de Freitas, Jonas Contiero, Michel Brienzo
Summary: This study explores the use of chemical and enzymatic treatments to convert biomass residue into valuable xylooligosaccharides (XOS). Different biomass sources require different treatment conditions to achieve maximum xylan solubilization and XOS production.
BIOENERGY RESEARCH
(2022)
Article
Environmental Sciences
Mateus Manabu Abe, Marcia Cristina Branciforti, Renato Nallin Montagnolli, Maria Aparecida Marin Morales, Ana Paula Jacobus, Michel Brienzo
Summary: This study successfully developed bioplastics made from a mixture of starch and xylan, with cellulose extracted from sugarcane bagasse added to the process. The bioplastics disintegrated quickly without causing ecotoxicity, and had minimal impact on seed germination rates.
Article
Energy & Fuels
Beatriz Salustiano Pereira, Caroline de Freitas, Fernando Masarin, Michel Brienzo
Summary: Agro-industrial and food waste generation are increasing, and alternatives for their better use are needed. This study evaluated the production of xylooligosaccharides (XOS) via the conversion of industrial fruit and food waste using liquid hot water (LHW). The results showed different optimal conditions for XOS production from different types of waste.
BIOENERGY RESEARCH
(2023)
Article
Energy & Fuels
Caroline de Freitas, Michel Brienzo
Summary: Xylan was enzymatically hydrolyzed to produce xylooligosaccharides (XOS) using lignocellulosic biomass or solubilized xylan as the substrate. The enzymatic hydrolysis of solubilized xylan resulted in a higher yield and concentration of XOS compared to the enzymatic hydrolysis of partial delignified biomass. Partial delignification and milling of biomass improved enzymatic hydrolysis, leading to increased conversion. The molecular weight and polydispersity of xylan decreased after hydrolysis, but increased after the second hydrolysis cycle.
BIOENERGY RESEARCH
(2023)
Article
Polymer Science
Joao Victor Carpinelli Macedo, Mateus Manabu Abe, Paula Bertolino Sanvezzo, Renato Grillo, Marcia Cristina Branciforti, Michel Brienzo
Summary: This study investigates the influence of xylan from sugarcane bagasse on the mechanical and chemical properties of bioplastics composed of starch and glycerol. The presence of xylan increases the solubility and hydrophilicity of the bioplastics, reduces their crystallinity, and affects their mechanical properties. However, the combination of starch and xylan (5% and 10%) can improve the mechanical properties of the film and produce biodegradable bioplastics with potential applications.
Article
Green & Sustainable Science & Technology
Beatriz Salustiano Pereira, Alison Andrei Schmatz, Caroline de Freitas, Fernando Masarin, Michel Brienzo
Summary: A significant amount of fruit production is wasted each year, causing environmental and social damage. Acid hydrolysis is an important method to recycle these agricultural residues and generate valuable products such as xylooligosaccharides (XOS) with prebiotic potential. Bananas, oranges, and guava are major sources of fruit waste in Brazil.
Article
Energy & Fuels
Rogerio Martins Vieira, Paula Bertolino Sanvezzo, Marcia Cristina Branciforti, Michel Brienzo
Summary: This study examines the influence of particle size on the preparation of sugarcane bagasse, banana pseudostem, and orange bagasse for FTIR, SEM, and XRD analyses. The results show that particle size affects the extractive content and pectin removal of the biomasses. The FTIR spectra and SEM images reveal changes in intensity and surface morphology, while XRD analysis demonstrates a significant influence on crystallinity.
BIOENERGY RESEARCH
(2023)
Article
Polymer Science
Lusiane Malafatti-Picca, Elaine Cristina Bucioli, Michel Ricardo de Barros Chaves, Aline Machado de Castro, Erika Valoni, Valeria Maia de Oliveira, Anita Jocelyne Marsaioli, Jose Silvio Govone, Dejanira de Franceschi de Angelis, Michel Brienzo, Derlene Attili-Angelis
Summary: Approximately 400 billion PET bottles are produced annually in the world, with 8 to 9 million tons discarded in oceans. PET recycling using microbial hydrolysis shows promise for treating harmful polymeric waste. The study identified four fungal strains suitable for converting PET nanoparticles into terephthalic acid, and confirmed biodegradation through various analyses.
Article
Biotechnology & Applied Microbiology
Alison Andrei Schmatz, Joao Paulo Candido, Dejanira de Franceschi de Angelis, Michel Brienzo
Summary: This study evaluated the impact of dilute acid pretreatment on the hydrolysis and fermentation of sugarcane bagasse. The addition of an antioxidant resulted in lower levels of inhibitors, and partially delignified material showed improved cellulose solubility and ethanol production.
FERMENTATION-BASEL
(2023)
Article
Energy & Fuels
Carolina Froes Forsan, Caroline de Freitas, Michel Brienzo
Summary: This study proposes the use of banana pseudostem and leaves and guava bagasse for the production of cello-oligosaccharides, with the best results obtained through alkaline pretreatments and always with endoxylanase before endoglucanase.
BIOENERGY RESEARCH
(2023)
Article
Polymer Science
Ranieri Bueno Melati, Daiane Cristina Sass, Jonas Contiero, Michel Brienzo
Summary: This study evaluated different methods of xylan solubilization using various parts of sugarcane and found that the use of diluted hydrogen peroxide resulted in higher yields and purity. The delignification of the biomass before xylan solubilization allowed for the identification of optimal conditions for high yields, while the delignification of the solubilized xylan helped remove residual lignin. The solubilized xylan showed better characteristics compared to commercial xylan, with higher xylanase activity.
