Article
Chemistry, Multidisciplinary
Hanna Berhanu Lemma, Christian Freund, Abubeker Yimam, Friedrich Steffen, Bodo Saake
Summary: During the harvesting of the Enset plant, a large amount of fibrous residues are generated, which have high cellulose and hemicellulose content and low lignin and extractive content. These fibers are ideal for producing dissolving grade pulp and biogas. Prehydrolysis soda pulping with steam pretreatment was performed, followed by soda pulping under mild and severe conditions. A simple bleaching stage was used to achieve high brightness levels and viscosity. Steam treatment reduced the biochemical methane potential of prehydrolysis liquid, but higher biogas production volumes were still obtained at higher steaming severity.
Article
Materials Science, Paper & Wood
Jingqian Chen, Rodger P. Beatson, Kenny Tam, Paul Bicho, Heather L. Trajano
Summary: This study compared the effects of mild pre-hydrolysis kraft pulping and conventional kraft pulping on commercial softwood chips. The results showed that pre-hydrolysis increased the yield of hemicelluloses oligomers when the chip thickness was less than 2 mm, while it resulted in a significant decrease in fiber quality when the chip thickness was greater than 6 mm. Pre-hydrolysis followed by kraft pulping enhanced delignification without significant reduction in fiber length and width.
Article
Materials Science, Paper & Wood
Hengyu Xu, Keli Chen, Lilong Zhang, Yulong Wu
Summary: In this study, black liquors (BLs) obtained from soda-oxygen pulping of wheat straw were compared with conventional soda-anthraquinone (soda-AQ) BLs. The soda-oxygen process achieved over 45% silicon removal from BL at a similar delignification level, and the total solid concentration was easily concentrated by up to approximately 50%. The silicon content could be further reduced by simple centrifugation and membrane filtration, with the total solid concentration reaching 60% at 300 mp s, indicating improved properties for potential applications.
Article
Energy & Fuels
M. Sarwar Jahan, Moinul Haque, Kazi M. Yasin Arafat, Yangcan Jin, Hui Chen
Summary: Prehydrolysis before pulping process can increase pulp yield and improve bleachability by reducing lignin molecular weight and increasing phenolic hydroxyl groups.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Agricultural Engineering
Jing Li, Zhaomeng Liu, Chengqi Feng, Xiaoying Liu, Fangyu Qin, Chen Liang, Huiyang Bian, Chengrong Qin, Shuangquan Yao
Summary: The study focuses on extracting bamboo hemicellulose using freeze-thaw assisted alkali treatment, evaluating the effect of various parameters on the extraction efficiency. By adjusting the alkali concentration and other factors, a higher purity, molecular weight, and lower polydispersity hemicellulose sample was obtained compared to conventional alkali treatment.
BIORESOURCE TECHNOLOGY
(2021)
Review
Chemistry, Analytical
Merichel Plaza, Maria Luisa Marina
Summary: Pressurized hot water extraction (PHWE) is a sustainable technique for extracting bioactive compounds without using organic solvents. This review provides an overview of PHWE fundamentals and its applications in recovering bioactive compounds from 2019 onwards. It also discusses the latest trends in PHWE, including its combination with other advanced extraction techniques and the use of natural deep eutectic solvents to enhance extraction yields.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2023)
Article
Agriculture, Multidisciplinary
Karen Saporittis, Julieta Marasco, Rocio Morales, Maria J. Martinez, Ana M. R. Pilosof
Summary: The rheological properties of chia mucilage extracts are affected by ultrasonic-assisted extraction conditions and the ratio of translucent phase to opaque phase. Different characteristics of mucilage and high extraction yield can be obtained by adjusting the extraction conditions.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2023)
Article
Engineering, Chemical
Nicolaus Bijok, Juha Fiskari, Richard R. Gustafson, Ville Alopaeus
Summary: This article focuses on a multiscale modelling approach to describe the delignification of softwood during the kraft pulping process. The model framework considers the chemical components of wood, diffusion limitations, and initial component distributions within a softwood chip mixture. The sub-models for the kinetics and mass transfer phenomena of the kraft pulping process were modified to better predict the experimental data.
CHEMICAL ENGINEERING RESEARCH & DESIGN
(2023)
Article
Materials Science, Paper & Wood
Nirmal Sharma, Nishi Kant Bhardwaj, Ram Bhushan Prashad Singh
Summary: The utilization of peracetic acid as a pretreatment agent for hardwood pulp can effectively reduce the emission of toxic substances during the bleaching process and produce high-quality pulp.
CELLULOSE CHEMISTRY AND TECHNOLOGY
(2022)
Article
Biotechnology & Applied Microbiology
Jie-Yu Cui, Ning Zhang, Jian-Chun Jiang
Summary: The effects of microwave assisted liquid hot water (MA-LHW) pretreatment on the chemical composition and fiber structure of Moso bamboo were investigated. The results showed that MA-LHW pretreatment had high selectivity for the degradation of hemicellulose in Moso bamboo, and the extracted hemicellulose could be used to prepare xylooligosaccharide. Moreover, MA-LHW pretreatment increased the removal of hemicellulose and lignin, and retained more cellulose with crystalline structure.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Engineering, Chemical
Hyun-Kyu Choi, Sang Hwan Son, Joseph Sang-Il Kwon
Summary: This study develops a multiscale model for continuous Kraft pulping processes and designs a soft sensor to achieve optimal control in regulating blow-line pulp properties.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Energy & Fuels
Suvi Kyyro, Michael Altgen, Lauri Rautkari
Summary: The size of wood affects the efficiency of hot water extraction, with smaller samples resulting in greater mass loss due to difficulties in diffusion and mass transfer. Additionally, the size of wood also influences the amount of dissolved compounds in the extraction liquid.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Agricultural Engineering
Ekaterina Sermyagina, Clara Mendoza Martinez, Jussi Lahti, Markku Nikku, Mika Manttari, Mari Kallioinen-Manttari, Esa Vakkilainen
Summary: Hot-water extraction (HWE) is a biomass processing method that can generate multiple value-added products. In this study, pellets were produced from original and HWE-treated spruce sawdust, with different methods of separating the extracted sawdust from the liquid phase used. The HWE improved the mechanical and energy properties of the pellets and modified the lignocellulosic matrix of the feedstock. The method of sawdust separation from the extract had an impact on the pellet characteristics.
BIOMASS & BIOENERGY
(2022)
Article
Green & Sustainable Science & Technology
Sebastian Serna-Loaiza, Manuel Dias, Laura Daza-Serna, Carla C. C. R. de Carvalho, Anton Friedl
Summary: Developing sustainable biorefineries is crucial for the transition to a sustainable society. This study evaluated the effects of liquid-hot-water pretreatment on sugars, degradation products, and lignin, providing important data for improving the sustainability of biorefineries.
Article
Materials Science, Paper & Wood
Xiaoyan Zhang, Lanxing Du, Sijin Li
Summary: This study isolated hemicelluloses from larch sapwood and heartwood and determined their monosaccharide compositions. The results showed that the yield of AG in larch heartwood was low, while the total yield of alkali-extracted hemicelluloses was high.
Article
Agricultural Engineering
G. Grasa, I. Martinez, R. Murillo
Summary: Gasification kinetics of six chars from residual origin were studied under relatively low temperature, low CO2, and high H2O partial pressures. The Random Pore Model (RPM) showed the best fit to experimental results, but the selection of the reaction model depended on the ash composition, specifically the presence of alkali and alkaline earth metals. Chars with ash content higher than 30% wt. were modeled with the RPM model, while chars with the highest K/Si ratio required modified versions of the RPM to accurately predict reaction rates. Textural properties played a key role in determining reaction parameters, such as the pre-exponential factor and activation energy, for chars with similar ash content and composition.
BIOMASS & BIOENERGY
(2024)
Review
Agricultural Engineering
V. Godvin Sharmila, Surya Prakash Shanmugavel, J. Rajesh Banu
Summary: Proper treatment and disposal of biomass waste is crucial to prevent environmental deposition and its negative impacts. Biofuel has emerged as a potential alternative to fossil fuels, reducing carbon emissions and meeting global energy demands. This review examines different biomass waste conversion techniques and explores the production of biofuels with zero carbon emissions. Research on anaerobic treatment, metabolic engineering, and artificial intelligence has been conducted to enhance biofuel production efficiency.
BIOMASS & BIOENERGY
(2024)
Review
Agricultural Engineering
Selvakumar Periyasamy, Adane Asefa Adego, P. Senthil Kumar, G. G. Desta, T. Zelalem, V. Karthik, J. Beula Isabel, Mani Jayakumar, Venkatesa Prabhu Sundramurthy, Gayathri Rangasamy
Summary: Valorizing agricultural waste into valuable products is crucial for environmental protection and bioeconomy advancement. Preprocessing of agricultural waste is a critical step to convert free carbohydrate molecules for final conversion, and factors such as biomass nature, feed loading, pH, temperature, and time influence the process. This review provides comprehensive information on agricultural waste availability, preprocessing techniques, and factors influencing performance.
BIOMASS & BIOENERGY
(2024)
Article
Agricultural Engineering
Aqueel Ahmad, Ashok Kumar Yadav, Achhaibar Singh, Dinesh Kumar Singh
Summary: The study focuses on predicting and optimizing the yield of biogas production in an anaerobic digester using co-digestion. Experimental data was used to develop a machine learning-based prognostic model, and the Response Surface Methodology (RSM) was employed to optimize the parameters. The results demonstrate that RSM coupled with machine learning is an effective technique for modeling, predicting, and optimizing biogas production yield.
BIOMASS & BIOENERGY
(2024)
Article
Agricultural Engineering
Yijing Zhong, Wenxiang Zhai, Xinli Wei
Summary: This paper studies the thermal stability and decomposition of cork materials with and without silica aerogel filler. The results show that the decomposition is inhibited and the pyrolysis is significantly reduced with the addition of silica aerogel. This finding suggests that silica aerogel-infused cork may be a promising raw material for biofuel production with reduced environmental pollution.
BIOMASS & BIOENERGY
(2024)