Article
Agricultural Engineering
Forough Momayez, Mattias Hedenstrom, Stefan Stagge, Leif J. Jonsson, Carlos Martin
Summary: In this study, hydrolysis lignin was extracted using the green solvent gamma-valerolactone (GVL), and it was found that mixtures containing sulfuric acid resulted in higher solubilization and regeneration rates. Characterization of the regenerated lignins revealed that treatment temperature had a significant impact on molecular weight, with SA-GVL lignins exhibiting higher and broader distribution of molecular weight.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Jiming Yang, Shulin Wang, Fudong Bai, Xingmei Lu, Wei He, Zheng Fang, Ning Zhu, Kai Guo
Summary: Pretreatment of lignocellulose with a binary system consisting of 1-n-butyl-3-methylimidazole chloride (BMIMCl) and arginine (Arg) at temperatures higher than the glass transition temperature of lignin (Tg-lignin) can effectively reduce cellulose crystallinity and lignin content, improving enzymatic hydrolysis efficiency and reducing enzyme dosage.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Biochemistry & Molecular Biology
Ahmed Salama
Summary: The synthesis and characterization of a novel cellulose derivative as a sustainable adsorbent for cationic and anionic dyes are described. The cellulose derivative demonstrated efficient adsorption for methylene blue and methyl orange removal.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Green & Sustainable Science & Technology
Wei Liu, Shuya Zhang, Kun Liu, Hongbin Yang, Qingyi Lin, Ting Xu, Xueping Song, Haishun Du, Long Bai, Shuangquan Yao, Chuanling Si
Summary: Lignocellulosic nanofibrils (LCNFs) were isolated from poplar sawdust using a sustainable preparation approach. The LCNFs showed a network structure with high crystallinity, good thermal stability, and fine dispersibility in water. Lignocellulose nanopapers (LCNP) prepared using the LCNFs exhibited superior mechanical performance and excellent UV-blocking function. This work offers an optimized strategy for valorization and full utilization of low-value poplar sawdust into value-added LCNFs and LCNP.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Biotechnology & Applied Microbiology
Preethi, M. Gunasekaran, Gopalakrishnan Kumar, Obulisamy Parthiba Karthikeyan, Sunita Varjani, Rajesh J. Banu
Summary: Lignocellulose biomass is a prevalent and economic substrate for biofuel production, but the presence of refractory components in biomass poses obstacles in enzymatic hydrolysis, which can be improved through advanced pretreatment technology. Suitable pretreatment enhances hydrolysis by converting polymeric substances into monomers, making biomass more accessible for enzymes and enhancing fermentation. Optimization of integrated pretreatment for biofuel production is necessary in terms of economic and environmental aspects to replace fossil fuels.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Environmental
Zhimin Wang, Fengjiao Zhang, Dongcan Lv, Guangce Jiang, Hongsen Zhang, Guangqin Gao, Aimin Ning, Su Shiung Lam, Andong Song
Summary: In this study, an Iron Oxychloride (FeOCl)-based heterogeneous Fenton method was proposed as a promising approach for lignocellulose pretreatment, showing higher reducing sugars yield and easier catalyst recovery compared to the traditional Fe2+/H2O2 homogeneous Fenton reaction.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Agricultural Engineering
Zhao Qin, Dan Wang, Tinglan Li, Ruoshi Luo, Dan Zhou, Xiaochao Xiong
Summary: A dual-phase enzyme-shuttling compartment system was successfully constructed in this study, where the inclusion of Tween 80 in isooctane-IL phase maintained the active conformation of cellulase. The bamboo biomass was enzymatically hydrolyzed in this system at 50℃, resulting in a high yield of reducing sugars and maintaining a high enzymatic activity.
BIORESOURCE TECHNOLOGY
(2022)
Article
Biochemistry & Molecular Biology
Wei-dong Zhang, Yan Li, Ke Wang, Ye Yue, Mei Tie, Xue-jun Gu, You-lin Xue
Summary: This study used ionic liquids to extract cellulose-protein complexes (CPCs) from Se-enriched peanut leaf residue and compared the effects of different ionic liquids and organic solvents on the properties of CPCs.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Biotechnology & Applied Microbiology
Waseem Ayoub Malik, Saleem Javed
Summary: The study reported the partial purification and characterization of cellulase from Bacillus subtilis CD001 and its application in biomass saccharification, demonstrating the enzyme's potential for efficient hydrolysis of cellulosic materials.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Guilherme L. P. Aydos, Graciane Marin, Guenter Ebeling, Francisco P. dos Santos, Barbara C. Leal, Rafael D. Zink, Brenda A. Vargas, Pedro Migowski, Rafael Stieler, Bruno B. de Araujo, Paulo Goncalves, Hubert K. Stassen, Leonardo dos Santos Pereira, Ana Paula Musse, Jairton Dupont
Summary: The covalent attachment of 3- or 4-hydroxy benzene to the 1,3-dimethylimidazolium cation results in zwitterions, which can chemisorb and physisorb carbon dioxide in aqueous solutions. These zwitterionic solutions have low enthalpy of absorption, high adsorption capacity, and can be recycled multiple times.
Article
Biotechnology & Applied Microbiology
Jie Gao, Mohamed Jebrane, Nasko Terziev, Geoffrey Daniel
Summary: Willow species, like many hardwoods, produce tension wood with special fibres that can enhance the release of cellulose and d-glucose for biofuel production. A method utilizing stem sections and enzymes was developed to compare different varieties' ability to produce tension wood and release d-glucose, highlighting the importance of tension wood cellulose as a marker for enhanced d-glucose production in Salix varieties.
BIOTECHNOLOGY FOR BIOFUELS
(2021)
Review
Materials Science, Paper & Wood
Mohsin Raza, Basim Abu-Jdayil
Summary: This article evaluates the feasibility of large-scale production of nanocrystalline cellulose and provides a review of the isolation methods and surface modification techniques.
Article
Biochemistry & Molecular Biology
Thalita J. J. Bondancia, Camila Florencio, Graziela S. S. Baccarin, Cristiane S. S. Farinas
Summary: Cellulose nanostructures obtained from lignocellulosic biomass by the enzymatic route can offer advantages in terms of material properties and processing sustainability. The presence of auxiliary enzymes can promote the production of nanocellulose with improved properties.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2022)
Article
Agronomy
Viviane Fatima de Oliveira, Lucas Figueiredo, Gabriel de Oliveira Correia, Maria de Fatima Pires da Silva Machado, Hugo Zeni Neto, Wanderley Dantas dos Santos, Claudete Aparecida Mangolin
Summary: This study demonstrates that the application of natural inhibitors can increase the production of fermentable sugars in energy crops without the need for additional lignin-removal pretreatments. The most successful results soften the most recalcitrant lignocellulose to the level of other biomasses and make it more susceptible to saccharification.
GLOBAL CHANGE BIOLOGY BIOENERGY
(2023)
Article
Green & Sustainable Science & Technology
J. Y. Zhu, Xuejun Pan
Summary: Lignocellulosic plant biomass is a sustainable alternative resource for the production of fuels and chemicals. The sugar platform is a promising approach for converting cellulose and hemicelluloses in plant biomass into targeted products. However, the natural recalcitrance of lignocellulose makes efficient and sustainable sugar production a challenge.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Chemistry, Physical
Pablo Juarez, Clara Lopez-Aguado, Marta Paniagua, Juan A. Melero, Rafael Mariscal, Gabriel Morales
Summary: This study presents the production of jet-fuel precursors from the aldol-dimerization of levulinic acid using acid zeolites. The research shows high conversion and selectivity under solventless conditions. The cooperative effect between strong Bronsted and strong Lewis acid sites favors the selective formation of dimers. H-Beta 19 exhibits the best catalytic performance in terms of activity and selectivity, attributed to its optimum Bronsted to Lewis acid sites ratio and balance of acid sites.
APPLIED CATALYSIS A-GENERAL
(2022)
Article
Biotechnology & Applied Microbiology
Luis D. Allegue, Daniel Puyol, Juan Antonio Melero
Summary: The study showed that thermophilic co-fermentation of pruning lignocellulosic and food wastes can effectively produce hydrogen and carboxylic acids. Steam explosion pretreatment significantly enhances the process, leading to higher hydrogen and carboxylic acid yields. However, an increased lignocellulosic fraction in the feed can reduce the hydrogen production.
BIOFUELS BIOPRODUCTS & BIOREFINING-BIOFPR
(2022)
Article
Environmental Sciences
S. Jerez, M. Ventura, R. Molina, F. Martinez, M. I. Pariente, J. A. Melero
Summary: The study explored the feasibility of using a Fenton-type process for the pretreatment of oily refinery sludge, finding that adjusting temperature and hydrogen peroxide concentration can effectively decrease TPHs content and increase organic carbon concentration in the liquid phase. The treated aqueous phase showed increased biodegradability, making it suitable for further biological processing in the refinery scheme.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Chemistry, Physical
M. Munoz-Olasagasti, I Martinez-Salazar, M. Lopez Granados, C. Lopez-Aguado, J. Iglesias, G. Morales, R. Mariscal
Summary: This study investigated the effects of the nature and strength of surface acid sites on the properties of the catalyst used for the conversion of levulinic acid to valeric biofuels. The presence of strong Bronsted acid sites was critical for achieving high ethyl valerate yields, while three types of Lewis acid sites were also identified. Reutilization tests of the catalyst showed mild deactivation, and simple calcination treatment was adequate for the recovery of surface acidity but affected the reducibility of Pd species.
SUSTAINABLE ENERGY & FUELS
(2022)
Article
Engineering, Chemical
Clara Lopez-Aguado, Daniel Martinez del Monte, Marta Paniagua, Gabriel Morales, Juan A. Melero
Summary: This work presents a conceptual design and techno-economic analysis of a process for the production of gamma-valerolactone (GVL) from levulinic acid. The process utilizes catalytic transfer hydrogenation with a bifunctional Zr-Al-Beta catalyst and an excess of isopropyl alcohol (IPA) as both hydrogen donor and solvent. The liquid-phase process operates under moderate conditions, eliminating the need for high-pressure hydrogen. The techno-economic analysis considers the reaction unit and downstream purification section, revealing an investment of 6.4 million euros and an annual operational cost of 7.5 million euros. The Minimum Selling Price for GVL is estimated to be 3076 euros/ton. Cost sensitivity analyses highlight the high IPA purchasing price and losses in side reactions as the main obstacles for achieving a competitive market price for GVL using this approach.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Agricultural Engineering
Y. Segura, R. Molina, I. Rodriguez, T. Hulsen, D. Batstone, V. Monsalvo, F. Martinez, J. A. Melero, D. Puyol
Summary: Purple phototrophic bacteria (PPB) are used to recover organics and nutrients from wastewater through assimilative growth. Thermal hydrolysis (TH) as a pretreatment method before anaerobic digestion (AD) improves digestibility and recovery potentials. The study found that continuous TH pretreatment resulted in enhanced recovery potentials, with methane production reaching up to 380 LCH4/kgVS and 73% nitrogen release over 165 days. Although TH pretreatment is energy-intensive, a combined configuration with heat recovery and increased methane production in AD can make it energy positive.
BIORESOURCE TECHNOLOGY
(2023)
Article
Chemistry, Physical
Andrea Merenda, Samantha A. Orr, Yang Liu, Blanca Hernandez Garcia, Amin Osatiashtiani, Gabriel Morales, Marta Paniagua, Juan A. Melero, Adam F. Lee, Karen Wilson
Summary: In this study, a dual-catalyst bed configuration was developed to achieve efficient conversion of levulinic acid into gamma-Valerolactone (GVL). By utilizing sulfated zirconia (SZ) and ZrO2/SBA-15 as the Bronsted and Lewis acid catalysts, respectively, high conversion and selectivity were achieved in the esterification and hydrogenation reactions. The dual-bed system showed significantly higher productivity compared to the individual catalysts or their physical mixture.
Article
Engineering, Environmental
C. Gonzalez, M. I. Pariente, R. Molina, L. G. Espina, M. O. Masa, V. Bernal, J. A. Melero, F. Martinez
Summary: Different operating conditions of wet air oxidation and catalytic wet air oxidation were studied for the treatment of highly concentrated methyldiethanolamine wastewater streams. Wet air oxidation achieved remarkable removals of methyldiethanolamine, sulfides, chemical oxygen demand and total organic carbon. Catalytic wet air oxidation using activated petroleum coke showed similar performance to non-catalytic experiments in terms of wastewater treatment and significantly increased the biodegradability of the treated effluents.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Energy & Fuels
Pratiksha Srivastava, John A. A. Villamil, Juan A. A. Melero, Fernando Martinez, Daniel Puyol
Summary: This study identified cost-effective inorganic acids as an effective method to inactivate purple phototrophic bacteria (PPB) and achieve higher polyhydroxyalkanoate (PHA) recovery. Compared to traditional formaldehyde inactivation, inorganic acid inactivation resulted in significantly higher PHA recovery (33% vs 20%). The samples treated with inorganic acid remained stable even after 14 days, with the same PHA recovery as on day 0. This pioneering research demonstrates that inorganic acid inactivation can be economically advantageous for large-scale PHA production.
BIOMASS CONVERSION AND BIOREFINERY
(2023)
Article
Energy & Fuels
Gabriel Morales, Marta Paniagua, Daniel de la Flor, Maria Sanz, Pedro Leo, Clara Lopez-Aguado, Hector Hernando, Samantha A. Orr, Karen Wilson, Adam F. Lee, Juan A. Melero
Summary: Mesoporous silica-supported Zr-MOF-808 catalysts were synthesized and tested for the aldol condensation of furfural and methyl isobutyl ketone to bio-jet fuel precursors. The addition of Zr-MOF-808 nano-crystals to silica scaffolds resulted in well-dispersed Zr species with strong Lewis acidity. The Zr-MOF-808/silica hybrid materials exhibited higher condensation activity compared to unsupported Zr-MOF-808, and the textural properties of the silica support played a significant role in the catalytic performance.
Article
Green & Sustainable Science & Technology
Mario Martin-Gamboa, Luis D. Allegue, Daniel Puyol, Juan Antonio Melero, Javier Dufour
Summary: Bioplastics, including polyhydroxyalkanoates (PHA), offer a promising sustainable alternative to petroleum-based plastics. This study used a lifecycle assessment (LCA) approach to quantitatively evaluate the environmental implications of PHA production using purple phototrophic bacteria (PPB) and low-value substrates. The research found that the photobiorefinery stage had the greatest environmental impact, but compared to conventional plastics, PHA production resulted in reduced carbon footprint and fossil resource usage. However, the situation was less favorable in terms of other impact categories.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Miriam El Tawil-Lucas, Maia Montana, Miguel Macias-Villasevil, Jovita Moreno, Jose Iglesias
Summary: In this study, the selective isomerization of aldoses into ketoses using different commercial Bronsted basic anion resins at low temperature conditions was investigated. Strong basic resins, especially IRA-900, showed the best performance, yielding fructose with high selectivity.
Article
Microbiology
Sandra Chacon-Aparicio, John Alexander Villamil, Fernando Martinez, Juan Antonio Melero, Raul Molina, Daniel Puyol
Summary: This work demonstrates a new method for the co-treatment of domestic wastewater and organic solid waste hydrolysate using a mixed culture of purple phototrophic bacteria. The results show that under controlled conditions, this method can achieve high removal efficiencies of COD, nitrogen, and phosphorus in a single step.
Article
Engineering, Environmental
S. Jerez, J. San Martin, M. Ventura, M. I. Pariente, Y. Segura, D. Puyol, R. Molina, J. A. Melero, F. Martinez
Summary: Oil refineries produce large amounts of refinery wastewater and oily sludge. Conventional treatments handle these effluents separately without considering resource recovery potential. Thermal hydrolysis of oily sludge at different temperatures and times reduces the solid fraction and releases soluble substrates. These hydrolyzed fractions can be used as substrates for the biological treatment of refinery wastewater.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2023)
Article
Chemistry, Physical
Ana Orozco-Saumell, R. Mariscal, J. Iglesias, P. Maireles-Torres, M. Lopez Granados
Summary: Long-term studies on the activity of the formic acid-mediated hydrogenation of MAc to SAc revealed that deactivation occurs when the catalyst is subjected to a high WHSV of MAc. However, the loss of activity can be compensated for by adjusting the reaction conditions.
SUSTAINABLE ENERGY & FUELS
(2022)
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)