Fermentation-Basel
·
2023
·Vol. 9
·期 9
·789
·
IF 3.7
William Rodrigues Alves,Thiago Alessandre da Silva,Arion Zandoná Filho,Luiz Pereira Ramos
This work aimed at producing lactic acid (LA) from sugarcane bagasse after steam explosion at 195 °C for 7.5 and 15 min. Enzymatic hydrolysis was carried out with Cellic CTec3 and Cellic HTec3 (Novozymes), whereas fermentation was performed withBacillus coagulansDSM2314. Water washing of pretreated solids before enzymatic hydrolysis improved both hydrolysis and fermentation yields. The presence of xylo-oligosaccharides (XOS) in substrate hydrolysates reduced hydrolysis efficiency, but their effect on fermentation was negligible. The presence of fermentation inhibitors in C5 streams was circumvented by adsorption on activated carbon powder with no detectable sugar losses. High carbohydrates-to-LA conversions (Yp/s) of 0.88 g·g−1were obtained from enzymatic hydrolysates of water-washed steam-exploded materials that were produced at 195 °C, in 7.5 min, and the use of centrifuged-but-never-washed pretreated solids decreased Yp/sby 16%. However, when the detoxified C5 stream was added at a 10% ratio, Yp/swas raised to 0.93 g·g−1for an LA productivity of 2.55 g·L−1·h−1. Doubling the pretreatment time caused a decrease in Yp/sto 0.78 g·g−1, but LA productivity was the highest (3.20 g·L−1·h−1). For pretreatment at 195 °C for 7.5 min, the elimination of water washing seemed feasible, but the use of longer pretreatment times made it mandatory to eliminate fermentation inhibitors.Keywords:sugarcane bagasse;steam explosion;enzymatic hydrolysis;fermentation;lactic acid
研究领域:
生物技术
·
化学工程
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DOI
高影响因子
Processes
·
2022
·Vol. 10
·期 4
·778
·
IF 3.352
Yuanxing Yang,Lihong Zhao,Junli Ren,Beihai He
Deep eutectic solvents (DESs) have been used for the pretreatment of lignocellulose and showed selective dissolution for different lignocellulosic components. In this study, six new ternary DESs were synthesized on the basis of anhydrous oxalic acid DES by adding alcohol, acid, and deionized water, respectively, including choline chloride/anhydrous oxalic acid/ethylene glycol (ChCl-OA-EG), choline chloride/anhydrous oxalic acid/glycerol (ChCl-OA-G), choline chloride/anhydrous oxalic acid/lactic acid (ChCl-OA-LA), choline chloride/anhydrous oxalic acid/malonic acid (ChCl-OA-MA), choline chloride/anhydrous oxalic acid/10% H2O (v/v) (ChCl-OA + 10% H2O), and choline chloride/anhydrous oxalic acid/20% H2O (v/v) (ChCl-OA + 20% H2O). The lignin in bagasse was extracted and separated with these ternary DESs, and Fourier Transform Infrared (FTIR), Scanning electron microscope (SEM), X-ray diffraction (XRD), Two-dimensional Heteronuclear Single Quantum Coherence (2D HSQC), and Thermogravimetric analysis (TG) were used to characterize the molecular structures of lignin and cellulose. The results showed that under the mild reaction condition of cooking at 90 °C for 4 h, all six ternary DESs effectively dissolved hemicellulose in bagasse, the DES ChCl-OA-MA prepared with malonic acid significantly increased the removal of lignin (71.64%) by breaking the β-O-4′ ether bond of lignin molecules, and the crystallinity of cellulose was also significantly improved (67.65%).Keywords:ternary deep eutectic solvents;bagasse;lignin;structure
研究领域:
生物化学
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材料科学
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DOI
高影响因子
Polymers
·
2018
·Vol. 10
·期 3
·282
·
IF 2.935
Qiang Zhang,Xueqin Zhang,Ziyan Zhu,Aiping Zhang,Chunhui Zhang,Xiaoying Wang,Chuanfu Liu
Esterification is a versatile way to produce the derivatives of lignocellulose with developed properties. However, the traditional heterogeneous esterification of lignocellulose suffered from the drawbacks of low efficiency, additional reaction medium and heating. In the present study, an efficient method was developed to produce the functionalized sugarcane bagasse (SCB) by ball milling without any additional solvents and heating. The effects of pulverization time, rotation speed, the kind of linear chain anhydrides, the ratio of anhydrides to SCB, with or without pyridine catalyst and the dosage of catalyst were investigated on weight percent gain (WPG) of SCB esters. The results indicated that the high efficiency of this mechanocatalystic esterification was probably due to the destroyed crystalline structure and the promoted penetration of the esterifying reagent onto SCB bulk caused by ball milling. The maximumWPGof SCB acetate, propionate and butyrate reached 33.3%, 33.6% and 32.4%, respectively. The physicochemical structure of the esterified SCB was characterized with Fourier transform infrared spectra (FT-IR), solid state cross-polarized magic angle spinning13C nuclear magnetic resonance (CP/MAS13C-NMR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The direct evidence of the esterification occurrence was provided with FT-IR and solid-state CP/MAS13C-NMR. The thermal stability of SCB increased upon the mechanocatalytic esterification. The results implied that the relatively homogeneous modification was achieved with this semi-homogeneous esterification method by ball milling.Keywords:sugarcane bagasse;esterification;ball milling;bio-based materials
研究领域:
生物质化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2025
·
IF 5.2
Zi-Quan Wang,Ya-Peng Du,Xiao-Ping Zheng,Yu Chai,Yu-Cang Zhang,Yan-Zhen Zheng
The direct conversion of raw lignocellulosic waste into specialty chemicals such as levulinic acid (LA) has the potential to significantly enhance biorefinery profitability. Here, we demonstrated that incorporating γ-valerolactone (GVL) as a co-solvent during the SO 3 H-functionalized ionic liquid-catalyzed conversion of bagasse in water markedly enhanced reaction rates and catalytic activity, achieving a LA yield as high as 76.1 % with a 1:1 vol ratio of GVL to water. This catalytic system also effectively converted other lignocellulosic waste to LA. Reaction constants and activation energies for the bagasse dehydration process to LA were obtained. Comprehensive characterization via Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD) elucidated significant changes in functional groups, surface morphology, and crystallinity index of solid residues over extended reaction times. Notably, hemicellulose and cellulose were converted within 4 h, with lignin remaining in the solid residues and forming by-products after prolonged reaction times. This efficient one-pot conversion method showed promise as a sustainable approach to transform agricultural waste into LA, offering new opportunities for eco-friendly resource utilization.
研究领域:
生物化学
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可再生能源
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2011
·
IF 4.365
Xian-wei Sui,Zhi Wang,Bing Liao,Ying Zhang,Qing-xiang Guo
Fast pyrolysis of bagasse pretreated by sulfuric acid was conducted in a fixed bed reactor to prepare levoglucosenone (LGO), a very important anhydrosugar for organic synthesis. The liquid yield and LGO yield were studied at temperatures from 240 to 350 °C and sulfuric acid loadings from 0.92 to 7.10 wt.%. An optimal LGO yield of 7.58 wt.% was obtained at 270 °C with a sulfuric acid pretreatment concentration of 0.05 M (corresponding to 4.28 wt.% sulfuric acid loading). For comparison, microcrystalline cellulose pretreated by 0.05 M sulfuric acid solution was pyrolyzed at temperature from 270 °C to 320 °C, and bagasse loaded with 3–5 wt.% phosphoric acid was pyrolyzed at temperature from 270 °C to 350 °C. The highest yield of LGO from bagasse was 30% higher than that from microcrystalline cellulose, and treatment with sulfuric acid allowed a 21% higher yield than treatment with phosphoric acid.
研究领域:
生物化学工程
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可再生资源利用
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2022
·
IF 8.91
Jiequan Liu,Ruyi Zhou,Junxia Yu,Li Guo,Xiaodi Li,Chunqiao Xiao,Haobo Hou,Ruan Chi,Guoqing Feng
Potentially toxic elements including lead (Pb), manganese (Mn), and copper (Cu) released from copper tailings would cause severe long-term environmental risks and potential threats to human health. To prevent these negative effects caused by the release of the metals, a novel magnetic carboxyl groups modified bagasse with high adsorption affinity and strong magnetism was synthesized through an in-situ precipitation method and used to simultaneously remove Pb, Mn, and Cu from the eluate of copper tailings. Results showed that release of Pb, Mn, and Cu from the copper tailings was pH, time, and particle size dependent, and maximum concentrations of them released in the eluate was 1.7, 1.9, and 4.1 mg L −1 under weak acid conditions. Batch adsorption experiment showed that the as-synthesized magnetic modified bagasse could selectively absorb Pb, Mn, and Cu from a complex solution with adsorption capacity of 137.3, 13.1, and 90.0 mg g −1 , respectively. X-ray photoelectron spectroscopy (XPS) and energy dispersive spectroscopy-mapping (EDS-mapping) demonstrated that Pb, Mn, and Cu interacted with the magnetic modified biosorbent mainly through coordination and ion exchange. Column experiments showed that higher than 99.5% of the released Pb, Mn, and Cu could be simultaneously removed by the magnetic modified bagasse, and the maximum concentrations of them released in the eluate of the copper tailings were all decreased to lower than 0.01 mg L −1 , which reached the discharge standards. After recycled by a magnet, the magnetic modified bagasse could be collected easily and used repeatedly. Because of the high efficiency and easy recovery, the used method had great practical application value in removal of potentially toxic elements released from metallic tailings.
研究领域:
环境科学
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生物技术
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产品关联
DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2017
·
IF 5.651
Hongdan Zhang,Shuaishuai Zhang,Hongyou Yuan,Gaojin Lyu,Jun Xie
An organosolv pretreatment system consisting of 60% ethanol and 0.025 mol·L −1 FeCl 3 under various temperatures was developed in this study. During the pretreatment, the highest xylose yield was 11.4 g/100 g raw material, representing 49.8% of xylose in sugarcane bagasse. Structural features of raw material and pretreated substrates were characterized to better understand how hemicellulose removal and delignification affected subsequent enzymatic hydrolysis. The 160 °C pretreated solid presented a remarkable glucose yield of 93.8% for 72 h. Furthermore, the influence of different additives on the enzymatic hydrolysis of pretreated solid was investigated. The results indicated that the addition of Tween 80 shortened hydrolysis time to 6 h and allowed a 50% reduction of enzyme loading to achieve the same level of glucose yield. This work suggested that FeCl 3 -catalyzed organosolv pretreatment could improve the enzymatic hydrolysis significantly and reduce the hydrolysis time and enzyme dosage with the addition of Tween 80.
研究领域:
生物技术
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Haohe Huang,Chaojian Zheng,Zhijun Zhang,Chongxing Huang
The enhancement of cellulose utilization in agricultural by-products, such as bagasse, holds significant importance in augmenting the value of secondary agricultural products. However, cellulose-based materials have limited application potential owing to their low strengths under wet and wet-low-temperature conditions. Improved mechanical properties of cellulose-based materials at wet and low temperatures can significantly enhance their suitability for application in cold chain processes. Furthermore, the effects of wet cryogenic conditions on cellulose-based materials are not well understood. In this study, composite films composed entirely of biomass are prepared via the co-solubilization of lignin and bagasse cellulose and then cured via hot pressing, which increases the wet and wet low-temperature strengths of the films. Furthermore, the mechanism by which cellulose/ lignin content influences the wet-low-temperature defects of films was investigated. Lignin self-polymerizes and hot pressing causes cross-linking in the cellulose-based films, which improves their performance in wet low-temperature environments. Furthermore, the micromorphologies, specific surface areas, and moisture distribution patterns of the cellulose films after wet -low-temperature treatment were investigated. The results indicate that cross-linking prevents large amounts of micro-nano scale free-water from entering the cellulose-based material, thereby preventing the formation of ice crystals at low temperatures, which can damage the microstructure. The results of this study can be used to develop bagasse cellulose/cellulose-based materials for applications in humid and low-temperature environments.
研究领域:
材料科学
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生物质工程
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产品关联
DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·Vol. 49
·期 9
·3783-3794
·
IF 2.5
Yan He,Tong Liu,Yuehua Deng
In this study, sugarcane bagasse biochar (SBBC) and its MgFe2O4 modified composites with different MgFe2O4/SBBC mass ratios were fabricated to remove norfloxacin (NOR) from aqueous solutions. The results showed that MgFe2O4@SBBC (1 : 2) prepared via impregnation coprecipitation exhibited excellent adsorption performance and environmental friendliness. The increased surface area, improved pore structure, abundant surface functional groups, and decreased pHpzc endowed MgFe2O4@SBBC (1 : 2) with a higher adsorption efficiency (16.9 mg g−1, 84.3%) than that of SBBC (9.76 mg g−1, 48.8%). The pseudo-second-order model better described the kinetic process, indicating that chemisorption mainly occurred on both biochars. Isotherm fitting results indicated that NOR was adsorbed on SBBC primarily by multilayer adsorption, whereas monolayer adsorption was observed for MgFe2O4@SBBC (1 : 2). The adsorption of NOR onto both biochars was spontaneous, endothermic, and highly pH-dependent. Combined with BET, FTIR and XPS results, NOR adsorption by SBBC was controlled by pore filling, hydrogen bonds, and π–π electron donor acceptor interactions. In addition to these mechanisms, electrostatic attraction and surface complexation jointly strengthened the adsorption capacity of MgFe2O4@SBBC (1 : 2).
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2021
·
IF 5.645
Manman Xu,Anqi Wang,Ying Xiang,Ahsan Ejaz,Junfeng Niu
Developing the unique structure of biomass as a template is beneficial for promoting the commercial application of template-based hierarchical porous carbon materials. Herein, self-template bagasse-based porous carbons with high capacitance performance are successfully synthesized though low-temperature carbonization to fix the original vascular bundle structure of the bagasse and high-temperature activated carbonization to obtain hierarchical porous structures in the tube wall. As electrode materials for supercapacitors, the as-fabricated self-template porous carbons display a high specific surface of 1351.7 m 2 g −1 , abundant oxygen functional groups of 17.33%, an ultrahigh specific capacitance of 418.5 F g −1 at 0.5 A g −1 and a good rate performance of 63.1% at a current density ranging from 0.5 to 10 A g −1 , which is mainly attributed to both natural and synthetic hierarchical porous structures in the obtained samples. Moreover, the self-template bagasse-based porous carbon devices also possess a remarkable energy density of 14.5 Wh kg −1 at 125 W kg −1 and good cycling stability of up to 98.9% after 10,000 cycles at 2 A g −1 . The design strategy described in this work offers a method to further simplify the template synthesis steps, while improving the performance, of biomass-based hierarchical porous carbons. Therefore, these materials can be developed as high capacitance electrodes for energy storage applications.
研究领域:
材料科学
·
能源存储
·
生物质利用
✓ 已验证
产品关联
DOI
高影响因子
Processes
·
2021
·Vol. 9
·期 2
·384
·
IF 2.847
Cuicui Li,Chongxing Huang,Yuan Zhao,Chaojian Zheng,Hongxia Su,Lanyu Zhang,Wanru Luo,Hui Zhao,Shuangfei Wang,Li-Jie Huang
Deep eutectic solvents (DESs) is a newly developed green solvent with low cost, easy preparation and regeneration. Because of its excellent solubility and swelling effect in lignocellulose, it has received widespread attention and recognition. In this study, choline-based deep eutectic solvents (DESs)—choline chloride-urea (CC-U), choline chloride-ethylene glycol (CC-EG), choline chloride-glycerol (CC-G), choline chloride-lactic acid (CC-LA), and choline chloride-oxalic acid (CC-OA)—were used to extract and separate bagasse. The effects of hydrogen bond donors on lignin separation and the fiber and lignin structure were investigated. All five DESs could dissolve lignin from bagasse; acidic DESs exhibited higher solubility than basic DESs. CC-OA effectively separated lignin and hemicellulose. CC-LA showed weaker lignin separation ability than CC-OA. CC-G, CC-EG, and CC-U were more inclined to selectively separate lignin than hemicellulose. The crystalline cellulose II structure was retained after DES pretreatment. Acidic DESs effectively improved the crystallinity of bagasse fiber; the crystallinities for CC-OA and CC-LA pretreatment were 62.26% and 61.65%, respectively. The lignin dissolved in DES was mainly syringyl lignin. The lignin dissolved in CC-U, CC-LA, and CC-OA contained a small amount of guaiacyl lignin.Keywords:deep eutectic solvent;bagasse;lignin;cellulose;chemical structure
研究领域:
生物化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POLYMERS AND THE ENVIRONMENT
·
2017
·Vol. 26
·期 2
·765-777
·
IF 1.877
Sun Lei,Chen Dongmei,Wan Shungang,Yu Zebin
Biochar derived from sugarcane bagasse was prepared at different pyrolysis temperatures and holding times for adsorption of dimetridazole and metronidazole from aqueous solution. The optimal pyrolysis temperature and holding time were 500 °C and 120 min, respectively. The removal efficiencies of dimetridazole and metronidazole were 98.0% and 88.8%, respectively, at biochar dosage of 4.0 g L −1 and solution temperature of 30 °C. Kinetics data were fitted by four kinetics models, and results indicated that adsorption was governed by pseudo-second-order kinetics. Adsorption is a multi-step process that involves film diffusion and pore filling. In addition, five isotherm models were employed to describe the adsorption equilibrium. Brunauer–Emmett–Teller model presented better fitting for the adsorption equilibrium, and the maximum adsorption capacities were 72.17 and 23.61 mg g − 1 for dimetridazole and metronidazole, respectively. The calculated values of ΔG 0 and ΔH 0 indicated the non-spontaneous and exothermic nature of the adsorption process at the range of temperature studied. Thermodynamic studies also revealed that physical and chemical adsorptions were co-action. The adsorption mechanisms of dimetridazole and metronidazole onto biochar were mainly hydrogen bonding and π–π interaction. All the results revealed that sugarcane bagasse biochar can be used as alternative to costly adsorbents for the removal of dimetridazole and metronidazole from aqueous solution.
研究领域:
环境科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）