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Article
Agricultural Engineering
Jiao Li et al.
Summary: Organic acid pretreatment is an effective method for separating lignocellulosic biomass, but lignin repolymerization hinders the process. A new organic acid pretreatment using levulinic acid was studied to overcome this issue. Optimal conditions for hemicellulose separation were determined at a levulinic acid concentration of 7.0%, temperature of 170 degrees C, and time of 100 minutes. The use of levulinic acid led to a significant increase in hemicellulose separation compared to acetic acid pretreatment, attributed to the inhibitory effect of gamma-valerolactone on lignin repolymerization.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Bikram Basak et al.
Summary: Emerging physicochemical pretreatment methods play a crucial role in efficient lignocellulose bioconversion and biofuel production by improving biomass accessibility and separating lignocellulosic biocomponents. These methods enable highly efficient lignocellulose bioconversion and contribute to addressing the global energy crisis by simplifying operation, reducing costs, and being environmentally friendly.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Anusuiya Singh et al.
Summary: The world is shifting from petroleum refineries to biorefineries due to fuel depletion and environmental concerns. To achieve sustainable development, eco-friendly and cost-effective approaches are needed in the production process. Lignocellulosic biomass is necessary for biorefineries, but pretreatment is required due to its complex structure. Hydrothermal pretreatment is the leading technology for recovering hemicellulose fraction with low inhibitors and increased cellulose. This article presents a detailed account of microwave-assisted hydrothermal pretreatment technologies, its cost-effectiveness, eco-friendliness, and the challenges for commercialization along with potential solutions.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Lu Liu et al.
Summary: The effect of mannitol was studied on the separation of poplar using mannitol-assisted oxalic acid pretreatment. The optimized conditions for separation efficiency were identified. Hemicellulose separation was achieved at 79.08%, while the separation of cellulose and lignin decreased. Smooth fiber surfaces and changes in lignin structure were observed, indicating lignin prevention. The environmentally friendly separation of hemicellulose provides a practical approach for resolving lignin problems during organic acid pretreatment.
INDUSTRIAL CROPS AND PRODUCTS
(2023)
Article
Agricultural Engineering
Shanshan Wang et al.
Summary: This study analyzed the effectiveness of mandelic acid pretreatment (MAP) for eucalyptus hemicellulose separation. Under optimal conditions (temperature: 150 degrees C; concentration: 6.0 wt%; time: 80 min), 83.66% of xylose was separated. The hemicellulose separation selectivity of MAP was found to be higher than that of acetic acid pretreatment (AAP). Additionally, MAP demonstrated stable and effective separation efficiency even after six reuses of the hydrolysate.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Jiarui Liang et al.
Summary: This study proposes a novel green pyruvic acid (PA) treatment method that significantly improves the separation efficiency of eucalyptus hemicellulose and reduces the treatment time. However, the separation of lignin was not effectively controlled after PA treatment.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Fei Wang et al.
Summary: Aromatic acids are used selectively in the separation of hemicellulose, while phenolic acids inhibit lignin condensation. The current study utilizes vanillic acid (VA), which combines the characteristics of aromatic and phenolic acids, for the separation of eucalyptus. Under specific conditions (170°C, 8.0% VA concentration, and 80 min), efficient and selective separation of hemicellulose is achieved. Compared to acetic acid pretreatment, the yield of xylose increased from 78.80% to 88.59% and the yield of lignin decreased from 19.32% to 11.19%. In addition, there was an increase in the β-O-4 content of lignin by 5.78% after pretreatment. This study provides a new starting point for the development of efficient and sustainable commercial technology through organic acid pretreatment.
BIORESOURCE TECHNOLOGY
(2023)
Article
Agricultural Engineering
Fulong Zhang et al.
Summary: By combining ball-milling, ultrasound, and hydrothermal treatment, a pretreatment method has been developed to produce xylooligosaccharides (XOS) and glucose with high yields from corn stover. This green and effective process selectively separates hemicellulose fractions, improving the production of XOS and glucose.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Denghao Ouyang et al.
Summary: A coupled process of biomass pretreatment using iron ions as electron carriers has been developed to increase cellulose digestibility and convert biomass to electricity. By utilizing different pretreatment methods, a significant amount of fermentable sugars was obtained from sugarcane bagasse while generating electricity.
BIORESOURCE TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ying Qin et al.
Summary: This article introduces a fully flexible self-powered sweat sensor fabricated from a cellulose-based conductive hydrogel. The sweat sensor has high flexibility, stability, and analytical sensitivity, and can analyze perspiration constituents in real time and wirelessly transmit the results to a user interface.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Agricultural Engineering
Huali Zeng et al.
Summary: In this study, lignin separation was improved using freeze-thaw-assisted pTsOH pretreatment, resulting in high separation, high extraction, high purity, and large molecular weight lignin samples.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Weiwei Zhang et al.
Summary: High pretreatment temperature is necessary to obtain xylo-oligosaccharides (XOS) with low degree of polymerization (DP). However, traditional isothermal pretreatment for XOS production may increase the generation of xylose and furfural with the reaction time extending (10-100 min). In this study, non-isothermal subcritical CO2-assisted seawater autohydrolysis (NSCSA) was used for the coproduction of XOS with low DP and glucose, resulting in a significantly higher XOS yield and specific surface area compared to traditional methods.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Bikram Basak et al.
Summary: In this study, an optimized hydrothermal process integrated with a deep eutectic solvent (DES) pretreatment was used to fractionate hemicellulose, cellulose, and lignin in rice straw, resulting in increased biomethane production during anaerobic digestion.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Chengqi Feng et al.
Summary: This study effectively separated and extracted hemicelluloses using p-toluenesulfonic acid treatment. The effects of temperature, p-TsOH concentration, and time were investigated, and optimal conditions were determined. Additionally, the dissolution mechanism of hemicellulose was analyzed.
BIORESOURCE TECHNOLOGY
(2022)
Review
Chemistry, Applied
Dan Sun et al.
Summary: Hydrothermal pretreatment (HTP) is a green and cost-effective technology that can efficiently degrade lignocellulosic biomass by disrupting the stable structure of plant cell walls. This review focuses on the degradation mechanism of hemicelluloses and lignin during HTP and discusses strategies for inhibiting lignin recondensation.
CARBOHYDRATE POLYMERS
(2022)
Article
Agricultural Engineering
So-Yeon Jeong et al.
Summary: This study investigated the structural changes in hemicellulose and lignin of yellow poplar and empty fruit bunch during hydrothermal and oxalic acid pretreatment, as well as their effects on enzymatic hydrolysis. It was found that yellow poplar had a higher weight loss and enzymatic hydrolysis yield compared to empty fruit bunch under the same pretreatment conditions.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Agricultural Engineering
Baojuan Deng et al.
Summary: The study analyzed the effect of salicylic acid treatment on the separation of eucalyptus components and found that it inhibits the separation of cellulose and lignin. It also increases the fiber crystallinity index and thermal stability.
BIORESOURCE TECHNOLOGY
(2022)
Article
Multidisciplinary Sciences
Song Zhang et al.
Summary: The study developed a bioinspired asymmetric amphiphilic surface that incorporates self-driven triboelectric adsorption for obtaining clean water from the atmosphere. By utilizing the spontaneous interfacial triboelectric charge and the droplet triboelectric nanogenerator, mechanical energy is converted into electrical energy, achieving a high efficiency in water collection.
NATURE COMMUNICATIONS
(2022)
Review
Agricultural Engineering
Chyi-How Lay et al.
Summary: This review focuses on novel and advanced techniques for lignocellulosic biomass pretreatment in bio-H2 production, including physical, chemical, physico-chemical, microbiological, and nanotechnology-based methods. The objective is to understand the impact of lignocellulosic biomass pretreatment on bio-H2 production and positive findings. The influence of different pretreatment techniques on biomass structure, particularly cellulose digestibility and the generation of inhibitory compounds, is discussed. The findings suggest that stepwise pretreatment is crucial for successful bio-H2 production, although cost-effective large-scale conversion of lignocellulosic biomass into fermentable sugars with low inhibitory concentration remains a challenge.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Fanyan Zeng et al.
Summary: In this study, the separation of bamboo hemicellulose was successfully achieved via a one-step freeze-thaw-assisted alkali treatment (OFT/AT). The selectivity of hemicellulose separation was improved, leading to a higher separation yield compared to conventional freeze-thaw-assisted alkaline treatment (FT/AT). The inhibition of lignin and cellulose separation was observed as the alkali concentration decreased, while the extraction yield of hemicellulose increased. Structural analysis revealed that the extracted hemicellulose had a relatively complete molecular structure, providing theoretical support for efficient hemicellulose separation by alkali treatment.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Bikram Basak et al.
Summary: Compared to conventional anaerobic digester sludge, a microbial consortium acclimatized to lignocellulose shows higher biogas productivity and methane yield. The dominant members within the Firmicutes, Bacteroidota, and Halobacteriota phyla are responsible for the increased methane production, while the abundance of syntrophic bacteria such as Proteiniphilum, Fermentimonas, Syntrophomonas, and Methanosarcina helps maintain digester stability and improve substrate-to-methane conversion.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Xiaohua Zhang et al.
Summary: In this study, a Choline chloride-formic acid (ChCl-FA) pretreatment process followed by enzymatic hydrolysis and fermentation was developed for co-producing bioethanol, xylose, and lignin from eucalyptus. The results showed high yields of glucose and ethanol, along with significant amounts of xylose and lignin obtained from pretreated eucalyptus.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Ramesh Kumar et al.
Summary: In this study, the use of humic acid for pretreating lignocellulosic biomass in alkaline conditions was successfully applied to separate lignin and hydrolyzable biocomponents. The resulting biomass hydrolysate was then converted into ethanol through enzymatic saccharification and yeast fermentation. The ethanol product was then separated and concentrated using membrane distillation, yielding a high flux of ethanol.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Yuqi Bao et al.
Summary: Organic acid pretreatments can efficiently separate biomass-based hemicellulose and selectively produce hemicellulose-derived sugars. In this study, hemicellulose separation was achieved as xylose and oligosaccharides using palm acid in a hydrothermal pretreatment process for eucalyptus. The results showed higher separation selectivity and yield of hemicellulose-derived sugars compared to glycolic acid pretreatment, leading to residual solids with improved biological stability. This work presents a new method for biomass refining.
BIORESOURCE TECHNOLOGY
(2022)
Article
Agricultural Engineering
Baojie Liu et al.
Summary: This study investigated the separation of eucalyptus components using 1-amino-2-naphthol-4-sulfonic acid (ns-A) pretreatment. The optimum condition for ns-A pretreatment was determined to be an organic acid concentration of 9% at a temperature of 170 degrees C for 80 minutes. Compared with p-toluenesulfonic acid pretreatment, the separation yield of hemicellulose increased while the separation yield and surface coverage of lignin decreased significantly. The ns-A pretreatment process also demonstrated a high recovery yield of organic acids and stable, efficient separation within six reuse cycles. The study discovered that lignin in eucalyptus contains specific structures that help inhibit depolymerization and polycondensation during ns-A pretreatment.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Agricultural Engineering
Haitao Yu et al.
Summary: Deep eutectic solvents (DESs) composed of carboxylic acids and quaternary ammonium salts have been found to efficiently dissolve lignin and play a positive role in lignocellulose pretreatment. The composition of DESs and the solubility of kraft lignin (KL) have been shown to be positively correlated, providing insights for designing stable DESs for lignin dissolution and pretreatment of lignocellulose.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Agricultural Engineering
Zhenju Bi et al.
Summary: This study explored the potential of using heat treated wood sawdust extracts as a natural substitute for wood preservatives, and improved its leaching resistance through a mild enzyme-catalyzed method. The results suggest that laccase-mediated pre-treatment of plant extracts has the potential to increase resistance to leaching.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Review
Energy & Fuels
Jayato Nayak et al.
Summary: This article introduces a novel membrane-integrated photo-microreactor system for converting lignocellulosic biomass to vanillin and downstream purification, which is considered as the most promising bio-chemical route, environmentally friendly, and cost-effective.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Multidisciplinary
Caoxing Huang et al.
Summary: This study proposes a method to improve the enzymatic digestibility of diluted acid pretreated bamboo residues (DAP-BR) by using low-cost milk protein. The effects of milk protein on the interactions between lignin and enzymes were investigated using fluorescence emission spectroscopy and surface plasmon resonance (SPR). The results show that milk protein can decrease the adsorption of lignin on cellulase and intervene in the interaction between DAP-MWL and cellulase.
Article
Chemistry, Multidisciplinary
Chen Huang et al.
Summary: Current studies on liquid hot water pretreatment focus on cellulose and hemicellulose conversion, but neglect the extraction and utilization of LHWP-induced lignin. This research proposes a series of LHWP-based combinatorial pretreatments using advanced solvent systems and investigates the physiochemical properties of the untreated and pretreated substrates to understand the mechanisms of different combinatorial pretreatments for facilitating integrated biomass valorization.
Article
Green & Sustainable Science & Technology
Ramesh Kumar et al.
Summary: Various eco-friendly approaches are crucial for efficient conversion of biomass to ensure high yields of biofuels as a commercial solution. Utilizing a range of microbes and enzymes can effectively convert lignocellulosic biomass into a biodegradable structure, facilitating its subsequent valorization.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Energy & Fuels
Jun Wang et al.
Summary: The study focused on the use of KHSO4 as a catalyst for furfural production, investigating optimal conditions and conducting XRD and TG analyses of raw corncob and reaction residue. Future work was also discussed.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Agricultural Engineering
Yadan Luo et al.
Summary: Glycolic acid pretreatment effectively separates eucalyptus hemicellulose, with optimal conditions of 5.40% acid concentration, 140 degrees C temperature, and 3 hours time. Compared to formic acid, the yield of xylose increased while that of lignin decreased. Glycolic acid shows high selectivity for hemicellulose separation and inhibits lignin repolymerization.
BIORESOURCE TECHNOLOGY
(2021)
Article
Engineering, Chemical
Roy Nitzsche et al.
Summary: This study developed a method to efficiently convert hemicellulose to xylose by hydrothermal pretreatment of hemicellulose hydrolyzates, and investigated the performance of four nanofiltration membranes in xylose separation. The hydrothermal treatment had positive effects on membrane performance and reduced fouling, leading to a higher flux and better separation ability.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Agriculture, Multidisciplinary
Jianhua Wang et al.
Summary: A new method for the qualitative and quantitative detection of crustacean tropomyosin in various food matrices was developed, showing accuracy and reliability.
JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE
(2021)
Article
Agricultural Engineering
Ruizhen Wang et al.
Summary: An environmentally friendly extraction method using hydrothermal-deep eutectic solvents pretreatment was proposed to simultaneously separate hemicelluloses and high purity lignin from moso bamboo. The method showed efficient fractionation of lignocellulose, with most cellulose retained in the residues, providing a potential pathway for comprehensive utilization of lignocellulose.
BIORESOURCE TECHNOLOGY
(2021)
Article
Agricultural Engineering
Jing Li et al.
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)
Article
Biotechnology & Applied Microbiology
Parveen Kumar Deralia et al.
Summary: The analysis of plant cell walls in response to pretreatment revealed varying structural and chemical modifications in lignin and hemicellulose, impacting cellulose conversion. Different species exhibited distinct molecular changes, influencing their recalcitrance to bioconversion processes. This highlights the importance of understanding plant-specific responses for enzyme preparation and pretreatment optimization.
BIOTECHNOLOGY PROGRESS
(2021)
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Huimei Wang et al.
CARBOHYDRATE POLYMERS
(2020)
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Chemistry, Multidisciplinary
Huiyang Bian et al.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2020)
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Milena Galdino Teixeira et al.
INDUSTRIAL CROPS AND PRODUCTS
(2020)
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Ninad Kothari et al.
Article
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(2019)
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(2018)
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(2017)
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(2017)
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Chemistry, Physical
Weimin Chen et al.
APPLIED SURFACE SCIENCE
(2017)
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Lishi Yan et al.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2016)
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Shuangquan Yao et al.
BIORESOURCE TECHNOLOGY
(2015)
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Kyeong Eop Kang et al.
BIORESOURCE TECHNOLOGY
(2013)
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Robert M. Baldwin et al.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2012)
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BIORESOURCE TECHNOLOGY
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