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Bertran-Llorens S, Zhou W, Palazzolo MA, Colpa DL, Euverink GJW, Krooneman J, Deuss PJ. ALACEN: A Holistic Herbaceous Biomass Fractionation Process Attaining a Xylose-Rich Stream for Direct Microbial Conversion to Bioplastics. ACS SUSTAINABLE CHEMISTRY & ENGINEERING 2024; 12:7724-7738. [PMID: 38783842 PMCID: PMC11110678 DOI: 10.1021/acssuschemeng.3c08414] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 04/17/2024] [Accepted: 04/18/2024] [Indexed: 05/25/2024]
Abstract
Lignocellulose biorefining is a promising technology for the sustainable production of chemicals and biopolymers. Usually, when one component is focused on, the chemical nature and yield of the others are compromised. Thus, one of the bottlenecks in biomass biorefining is harnessing the maximum value from all of the lignocellulosic components. Here, we describe a mild stepwise process in a flow-through setup leading to separate flow-out streams containing cinnamic acid derivatives, glucose, xylose, and lignin as the main components from different herbaceous sources. The proposed process shows that minimal degradation of the individual components and conservation of their natural structure are possible. Under optimized conditions, the following fractions are produced from wheat straw based on their respective contents in the feed by the ALkaline ACid ENzyme process: (i) 78% ferulic acid from a mild ALkali step, (ii) 51% monomeric xylose free of fermentation inhibitors by mild ACidic treatment, (iii) 82% glucose from ENzymatic degradation of cellulose, and (iv) 55% native-like lignin. The benefits of using the flow-through setup are demonstrated. The retention of the lignin aryl ether structure was confirmed by HSQC NMR, and this allowed monomers to form from hydrogenolysis. More importantly, the crude xylose-rich fraction was shown to be suitable for producing polyhydroxybutyrate bioplastics. The direct use of the xylose-rich fraction by means of the thermophilic bacteria Schlegelella thermodepolymerans matched 91% of the PHA produced with commercial pure xylose, achieving 138.6 mgPHA/gxylose. Overall, the ALACEN fractionation method allows for a holistic valorization of the principal components of herbaceous biomasses.
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Affiliation(s)
- Salvador Bertran-Llorens
- Green
Chemical Reaction Engineering, Engineering and Technology Institute
Groningen (ENTEG), University of Groningen, Nijenborgh 4, Groningen 9747 AG, The Netherlands
| | - Wen Zhou
- Products
and Processes for Biotechnology, Engineering and Technology Institute
Groningen (ENTEG), Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, Groningen 9747 AG, The Netherlands
| | - Martín A. Palazzolo
- Green
Chemical Reaction Engineering, Engineering and Technology Institute
Groningen (ENTEG), University of Groningen, Nijenborgh 4, Groningen 9747 AG, The Netherlands
- Instituto
Interdisciplinario de Ciencias Básicas (ICB, UNCuyo-CONICET), Padre Jorge Contreras 1300, Mendoza 5500, Argentina
- Instituto
de Investigaciones en Tecnología Química (INTEQUI),
FQByF, Universidad Nacional de San Luis,
CONICET, Almirante Brown
1455, San Luis 5700, Argentina
| | - Dana l. Colpa
- Products
and Processes for Biotechnology, Engineering and Technology Institute
Groningen (ENTEG), Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, Groningen 9747 AG, The Netherlands
| | - Gert-Jan W. Euverink
- Products
and Processes for Biotechnology, Engineering and Technology Institute
Groningen (ENTEG), Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, Groningen 9747 AG, The Netherlands
| | - Janneke Krooneman
- Products
and Processes for Biotechnology, Engineering and Technology Institute
Groningen (ENTEG), Faculty of Science and Engineering, University of Groningen, Nijenborgh 4, Groningen 9747 AG, The Netherlands
- Bioconversion
and Fermentation Technology, Research Centre Biobased Economy, Hanze University of Applied Sciences, Zernikeplein 11, Groningen 9747 AS, The Netherlands
| | - Peter J. Deuss
- Green
Chemical Reaction Engineering, Engineering and Technology Institute
Groningen (ENTEG), University of Groningen, Nijenborgh 4, Groningen 9747 AG, The Netherlands
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2
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Li L, Sun S, Wang M, Xiang J, Shao Y, Wu G, Zhou J, khan U, Xin Z. Improving the hydrolysis and acyltransferase activity of bifunctional feruloyl esterases DLFae4 by multiple rational predictions and directed evolution. FOOD BIOSCI 2023; 56:103140. [DOI: 10.1016/j.fbio.2023.103140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/15/2024]
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3
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Wang Z, Deuss PJ. The isolation of lignin with native-like structure. Biotechnol Adv 2023; 68:108230. [PMID: 37558187 DOI: 10.1016/j.biotechadv.2023.108230] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 08/03/2023] [Accepted: 08/04/2023] [Indexed: 08/11/2023]
Abstract
Searching for renewable alternatives for fossil carbon resources to produce chemicals, fuels and materials is essential for the development of a sustainable society. Lignin, a major component of lignocellulosic biomass, is an abundant renewable source of aromatics and is currently underutilized as it is often burned as an undesired side stream in the production of paper and bioethanol. This lignin harbors great potential as source of high value aromatic chemicals and materials. Biorefinery schemes focused on lignin are currently under development with aim of acquiring added value from lignin. However, the performance of these novel lignin-focused biorefineries is closely linked with the quality of extracted lignin in terms of the level of degradation and modification. Thus, the reactivity including the degradation pathways of the native lignin contained in the plant material needs to be understood in detail to potentially achieve higher value from lignin. Undegraded native-like lignin with an as close as possible structure to native lignin contained in the lignocellulosic plant material serves as a promising model lignin to support detailed studies on the structure and reactivity of native lignin, yielding key understanding for the development of lignin-focused biorefineries. The aim of this review is to highlight the different methods to attain "native-like" lignins that can be valuable for such studies. This is done by giving a basic introduction on what is known about the native lignin structure and the techniques and methods used to analyze it followed by an overview of the fractionation and isolation methods to isolate native-like lignin. Finally, a perspective on the isolation and use of native-like lignin is provided, showing the great potential that this type of lignin brings for understanding the effect of different biomass treatments on the native lignin structure.
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Affiliation(s)
- Zhiwen Wang
- Department of Chemical Engineering (ENTEG), University of Groningen, Nijenborgh 4, 9747, AG, Groningen, the Netherlands.
| | - Peter J Deuss
- Department of Chemical Engineering (ENTEG), University of Groningen, Nijenborgh 4, 9747, AG, Groningen, the Netherlands.
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4
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Pan N, Jiang B, Hu J, Huang M, He J, Jiang Q, Zhao L, Shen F, Tian D. The coupling effects between acid-catalyzed hydrothermal pretreatment and acidic/alkaline deep eutectic solvent extraction for wheat straw fractionation. BIORESOURCE TECHNOLOGY 2023; 386:129579. [PMID: 37506939 DOI: 10.1016/j.biortech.2023.129579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 07/19/2023] [Accepted: 07/25/2023] [Indexed: 07/30/2023]
Abstract
Mild hydrothermal pretreatment (HP) integrating with solvent extraction is a promising two-step technique to enhance the overall lignin and carbohydrate output for lignocellulose fractionation. This work comparatively assessed the coupling effect between mild HP (the first step) and the emerging acidic choline chloride-natural acid or alkaline choline hydroxide based deep eutectic solvents (DES, the second step) for wheat straw fractionation. It was shown HP with 0.3% p-toluenesulfonic acid (p-TsOH) catalyst achieved a good compromise between complete hemicellulose removal (nearly 100%) and high cellulose recovery (99.2%). While choline hydroxide based DES showed better coupling effect with HP than choline chloride-natural acid DES, corresponding to 75.6 and 31.2% lignin removal respectively. It was proposed that the alkaline DES enhanced lignocellulose swelling the lignin phenolic hydroxyl groups deprotonation and thus facilitating lignin solubilization despite of its condensation at HP. Therefore, the alkaline DES resulting cellulose-rich fraction exhibited higher potential for further processing.
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Affiliation(s)
- Na Pan
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Baiheng Jiang
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Jinguang Hu
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1N4, Canada
| | - Mei Huang
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Jinsong He
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Qin Jiang
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Li Zhao
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Fei Shen
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China
| | - Dong Tian
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan 611130, PR China.
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5
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Cassoni AC, Costa P, Mota I, Vasconcelos MW, Pintado M. Recovery of lignins with antioxidant activity from Brewer’s spent grain and olive tree pruning using deep eutectic solvents. Chem Eng Res Des 2023. [DOI: 10.1016/j.cherd.2023.01.053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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6
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Yue X, Suopajärvi T, Sun S, Mankinen O, Mikkelson A, Huttunen H, Komulainen S, Romakkaniemi I, Ahola J, Telkki VV, Liimatainen H. High-purity lignin fractions and nanospheres rich in phenolic hydroxyl and carboxyl groups isolated with alkaline deep eutectic solvent from wheat straw. BIORESOURCE TECHNOLOGY 2022; 360:127570. [PMID: 35788393 DOI: 10.1016/j.biortech.2022.127570] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/28/2022] [Accepted: 06/29/2022] [Indexed: 06/15/2023]
Abstract
A combined pretreatment based on alkaline deep eutectic solvent (DES) of K2CO3 and glycerol and sequential acid fractionation was developed to extract reactive lignin from wheat straw biomass. This process exhibited excellent purification performance in lignin isolation, and the lignin fractionated at low pH displayed high reactivity, having hydroxyl and carboxyl groups up to 9.60 and 2.52 mmol/g, respectively. Silica was selectively separated and removed during the precipitation stage, avoiding the "silica interference". Moreover, DES-lignin nanospheres created by self-assembly using lignin fractions obtained by acid precipitation possessed a high zeta potential, large particle size and high content of hydrophilic groups. Overall, the findings related to the dissociation mechanism and fractionation of reactive lignin during alkaline DES pretreatment and the acid sequence precipitation are crucial for facilitating lignin valorization in high-added value products.
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Affiliation(s)
- Xin Yue
- Fiber and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
| | - Terhi Suopajärvi
- Fiber and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
| | - Shirong Sun
- School of Chemical Engineering and Light Industry, Guangdong University of Technology, 510006 Guangdong, China
| | - Otto Mankinen
- NMR Research Unit, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland; Department of Diagnostic Radiology, Oulu University Hospital, 90014 Oulu, Finland
| | - Atte Mikkelson
- VTT Technical Research Centre of Finland, Vuorimiehentie 3, 02150 Espoo, Finland
| | - Harri Huttunen
- Unit of Measurement Technology MITY, Teknologiapuisto PL 127, 87400 Oulu, Finland
| | - Sanna Komulainen
- NMR Research Unit, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
| | - Idamaria Romakkaniemi
- Chemical Process Engineering Research Unit, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
| | - Juha Ahola
- Chemical Process Engineering Research Unit, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland
| | | | - Henrikki Liimatainen
- Fiber and Particle Engineering Research Unit, University of Oulu, P.O. Box 4300, 90014 Oulu, Finland.
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7
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Effect of alkaline and deep eutectic solvents pretreatments on the recovery of lignin with antioxidant activity from grape stalks. Int J Biol Macromol 2022; 220:406-414. [PMID: 35931297 DOI: 10.1016/j.ijbiomac.2022.07.233] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 07/18/2022] [Accepted: 07/29/2022] [Indexed: 11/23/2022]
Abstract
Grape stalks are lignocellulosic residues that can be valorized through the extraction of lignin - an underutilized biopolymer with high potential. Two lignin extraction methods, alkaline and deep eutectic solvents (DES), were studied, and experimental designs were carried out to obtain the best extraction conditions. The defined parameters for alkaline extraction allowed the recovery of ~48 % of lignin with low purity that was further improved with an autohydrolysis pretreatment (~79 % purity; ~32 % yield). Optimum parameters of DES method rendered high purity lignin (~90 %) without the need of a pretreatment and with a better yield (50.2 % (±2.3)) than the alkaline method. Both lignin fractions presented high antioxidant activities, being close to the antioxidant capacity of BHT for DPPH scavenging. Structural analysis proved the presence of lignin in both alkaline and DES samples with similar morphology. Overall, DES method was more efficient in the extraction of lignin from grape stalks besides its greener and sustainable nature. This work is uses DES to extract lignin from this biomass while comparing it with a commonly classical method, proving that grape stalks can be used to extract lignin with a sustainable and efficient method rendering a final ingredient with value-added properties.
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8
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Provost V, Dumarcay S, Ziegler-Devin I, Boltoeva M, Trébouet D, Villain-Gambier M. Deep eutectic solvent pretreatment of biomass: Influence of hydrogen bond donor and temperature on lignin extraction with high β-O-4 content. BIORESOURCE TECHNOLOGY 2022; 349:126837. [PMID: 35150854 DOI: 10.1016/j.biortech.2022.126837] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/03/2022] [Accepted: 02/05/2022] [Indexed: 06/14/2023]
Abstract
Recovering lignin with high β-O-4 content is of prime interest for further high yield depolymerization in low molecular weight phenolic compounds. Pretreatment of lignocellulosic biomass with deep eutectic solvents (DES) was studied to extract this type of tailored lignin from softwood and brewer's spent grains. In this work, choline chloride (ChCl) based DES with two different hydrogen bond donors (HBD) (lactic acid (LA) and Glycerol (Gly)), were investigated at mild temperatures (60 and 80 °C). The influence of DES pretreatment on extracted lignin molecular weight and structural characteristics was analysed. The acidity and density of DES were proved to affect lignin extraction yield and its features. The lignin characteristics (type of interunits, accessibility) were shown to impact their ability to be recovered. Acidic-DES ChCl:LA at 80 °C with woody biomass gave promising results with 78% of lignin extracted exclusively composed of G units with 61% of β-O-4 linkages with narrow molecular weights distribution.
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Affiliation(s)
- V Provost
- Université de Strasbourg, CNRS, IPHC, UMR 7178, F-67000 Strasbourg, France
| | - S Dumarcay
- Université de Lorraine, Faculté des Sciences et Techniques, Laboratoire d'Etude et de Recherche sur le Matériau Bois (LERMAB), Bld des Aiguillettes, F-54500 Vandoeuvre-les-Nancy, France
| | - I Ziegler-Devin
- Université de Lorraine, Faculté des Sciences et Techniques, Laboratoire d'Etude et de Recherche sur le Matériau Bois (LERMAB), Bld des Aiguillettes, F-54500 Vandoeuvre-les-Nancy, France
| | - M Boltoeva
- Université de Strasbourg, CNRS, IPHC, UMR 7178, F-67000 Strasbourg, France
| | - D Trébouet
- Université de Strasbourg, CNRS, IPHC, UMR 7178, F-67000 Strasbourg, France
| | - M Villain-Gambier
- Université de Strasbourg, CNRS, IPHC, UMR 7178, F-67000 Strasbourg, France.
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9
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Wen F, Zhang W, Jian W, He X, Yin J, Shi J, Lin H, Lu K, Qin Y, Qiu X. Sustainable production of lignin-derived porous carbons for high-voltage electrochemical capacitors. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117672] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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10
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Mankar AR, Pandey A, Pant KK. Microwave-assisted extraction of lignin from coconut coir using deep eutectic solvents and its valorization to aromatics. BIORESOURCE TECHNOLOGY 2022; 345:126528. [PMID: 34896526 DOI: 10.1016/j.biortech.2021.126528] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 12/02/2021] [Accepted: 12/04/2021] [Indexed: 06/14/2023]
Abstract
Lignin is a rich renewable source of aromatics present in lignocellulosic biomass (LCB). The extraction of lignin from the intricate LCB network is a challenging task for successful commercialization of sustainable biorefineries. In the present study, a series of choline chloride (ChCl)-carboxylic acid based deep eutectic solvents (DESs) were used for the extraction of lignin from coconut coir under microwave irradiation. Among the synthesized DESs, ChCl: lactic acid (LA) (1:4) gave the highest lignin yield of 82% with >95% purity. Interestingly, the severity factor (H factor) for the pretreatment process was found to be a significantly lower (55.5) as compared to reported studies due to efficient microwave heating. Moreover, the DES showed good recyclability for four recycle runs thus making it a promising candidate for the delignification of LCB. Finally, the extracted lignin was converted to aromatics via catalytic transfer hydrogenation (CTH) using Ru/C and isopropanol as in-situ hydrogen donor.
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Affiliation(s)
- Akshay R Mankar
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Ashish Pandey
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - K K Pant
- Department of Chemical Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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11
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Guo Y, Xu L, Shen F, Hu J, Huang M, He J, Zhang Y, Deng S, Li Q, Tian D. Insights into lignocellulosic waste fractionation for lignin nanospheres fabrication using acidic/alkaline deep eutectic solvents. CHEMOSPHERE 2022; 286:131798. [PMID: 34365175 DOI: 10.1016/j.chemosphere.2021.131798] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Revised: 07/25/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
Facile fractionation of lignocellulosic waste into useable forms is essential to achieve a multi-product treatment process especially when the resulting lignin streams are expected for high-value materials valorization. Despite acidic/alkaline deep eutectic solvents (DESs) are promising solvents for lignocellulosic waste fractionation, there is little information about their differences in the fractionation and lignin extraction profiles. In this work, four DESs that were cataloged to acidic types (formic acid-choline chloride, lactic acid-choline chloride) and alkaline types (monoethanolamine-choline chloride, glycerol-K2CO3) were investigated to compare their abilities of bamboo waste fractionation. Physicochemical properties of these resulting cellulose, lignin and derived lignin nanospheres (LNPs) were also assessed. Results showed that DESs could selectively extract lignin via cleaving lignin-carbohydrate linkages and lignin ether bonds. Acidic DESs pretreatments were more effective in biomass delignification (~95.0 %), while alkaline DESs showed better polysaccharide retention. Glycerol-K2CO3 LNPs exhibited much smaller sphere size (50-100 nm) while acidic DESs LNPs showed higher thermal stability due to higher extent of lignin condensation. In addition, MEA-ChCl could introduce amine groups onto lignin hydroxyl. This work provided insightful information for tailoring technique routes to selective lignocellulosic waste fractionation, while facilitating the downstream applications of the obtained cellulose/lignin.
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Affiliation(s)
- Yujie Guo
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan, 611130, PR China
| | - Lu Xu
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan, 611130, PR China
| | - Fei Shen
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan, 611130, PR China
| | - Jinguang Hu
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB, T2N 1N4, Canada
| | - Mei Huang
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan, 611130, PR China
| | - Jinsong He
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan, 611130, PR China
| | - Yanzong Zhang
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan, 611130, PR China
| | - Shihuai Deng
- College of Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan, 611130, PR China
| | - Qingye Li
- College of Food Science, Sichuan Agricultural University, No.46, Xin Kang Road, Yaan, Sichuan Province, 625014, PR China
| | - Dong Tian
- Institute of Ecological and Environmental Sciences, Sichuan Agricultural University, Chengdu, Sichuan, 611130, PR China.
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12
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Li H, Li X, You T, Li D, Nawaz H, Zhang X, Xu F. Insights into alkaline choline chloride-based deep eutectic solvents pretreatment for Populus deltoides: Lignin structural features and modification mechanism. Int J Biol Macromol 2021; 193:319-327. [PMID: 34699892 DOI: 10.1016/j.ijbiomac.2021.10.134] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Revised: 10/18/2021] [Accepted: 10/18/2021] [Indexed: 11/28/2022]
Abstract
Deep eutectic solvent (DES) is a kind of green solvent for biorefinery, which favors the progress of being more environmentally friendly and effective. A better understanding of structural changes of lignin is necessary to optimize pretreatment conditions and efficient utilization of the resultant lignin. The current study reported the structural features of lignin recovered from alkaline ChCl/imidazole and ChCl/urea DES pretreatment, and the mechanism of lignin modification was revealed. The profiling demonstrated that lignin samples possessed a high purity (>94.4%), low molecular weight ranging from 1544 to 2562 g/mol and an excellent uniformity (PDI < 1.6). Noteworthy, the content of β-O-4' linkages in lignin was over 75% (i.e. 72.2%-77.4% retention); S/G ratio was increased whereas the content of -OCH3 groups were decreased. It was revealed that slight cleavage of β-O-4' linkages, preferential breakdown of G units, and demethylation reaction were occurred during alkaline ChCl-based DES pretreatment. Specifically, cleavage of ester linkages between PB and lignin macromolecule was taking place during ChCl/imidazole pretreatment at a high temperature; whereas oxidation only appeared in ChCl/urea system. Despite the modification, well β-O-4' preserved and less condensed lignin samples were recovered after low-temperature pretreatment. Consequently, high contents of phenol derivatives (26.3-30.6%) were achieved in lignin oil. The present study provides critical information on alkaline ChCl-based DES pretreatment, which will contribute to the valorization of lignin by-products and will be beneficial to the development of biorefineries.
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Affiliation(s)
- Haichao Li
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China
| | - Xin Li
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China
| | - Tingting You
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China.
| | - Deqiang Li
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China; College of Chemical Engineering, Xinjiang Agricultural University, Urumchi, Xinjiang 830052, PR China
| | - Haq Nawaz
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China
| | - Xueming Zhang
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China
| | - Feng Xu
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China.
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13
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Xu J, Zhou P, Liu X, Yuan L, Zhang C, Dai L. Tandem Character of Liquid Hot Water and Deep Eutectic Solvent to Enhance Lignocellulose Deconstruction. CHEMSUSCHEM 2021; 14:2740-2748. [PMID: 33945234 DOI: 10.1002/cssc.202100765] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/03/2021] [Indexed: 06/12/2023]
Abstract
Pretreatment with efficient fractionation, eco-friendliness, and low-cost brings high security to future biorefinery systems. Synergistic pretreatment is a compelling blueprint to tackle the compact structure of lignocellulose towards a high-level valorization. Here, a stepwise approach was designed using hydrothermal and deep eutectic solvent (DES) pretreatments to hierarchically extract hemicelluloses and lignin from poplar, while delivering a cellulose-rich substrate that could easily undergo enzymatic hydrolysis to obtain fermentable glucose and residual lignin. The lifetime of recyclable DES showed that the pretreatment efficiency was still largely maintained after the fourth recycling. An enhancement of enzymatic digestibility from 13.9 to 90.4 % was initiated by the deconstruction of amorphous portions and robust cell wall. 23.7 % Xylooligosaccharides (degree of polymerization 2-6), 47.5 % DES-isolated lignin, and 19.2 % cellulose enzymatic lignin were harvested via this coupled process. This study could promote the precise design of sustainable tandem pretreatment that can boost the frontier of highly available biorefinery.
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Affiliation(s)
- Jikun Xu
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, 430081, Wuhan, P. R. China
| | - Pengfei Zhou
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, 430081, Wuhan, P. R. China
| | - Xinyan Liu
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, 430081, Wuhan, P. R. China
| | - Lan Yuan
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, 430081, Wuhan, P. R. China
| | - Chuntao Zhang
- School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, 430081, Wuhan, P. R. China
- Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials, Wuhan University of Science and Technology, 430081, Wuhan, P. R. China
| | - Lin Dai
- Tianjin Key Laboratory of Pulp and Paper, Tianjin University of Science and Technology, 300457, Tianjin, P. R. China
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Duan X, Dai Y, Zhang T. Characterization of Feruloyl Esterase from Bacillus pumilus SK52.001 and Its Application in Ferulic Acid Production from De-Starched Wheat Bran. Foods 2021; 10:foods10061229. [PMID: 34071417 PMCID: PMC8228269 DOI: 10.3390/foods10061229] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 05/26/2021] [Accepted: 05/27/2021] [Indexed: 01/16/2023] Open
Abstract
Feruloyl esterase (FAE; EC 3.1.1.73) catalyzes the hydrolysis of the 4-hydroxy-3-methoxycinnamoyl group in an esterified sugar to assist in waste biomass degradation or to release ferulic acid (FA). An FAE-producing strain was isolated from humus soil samples and identified as Bacillus pumilus SK52.001. The BpFAE gene from B. pumilus SK52.001 was speculated and heterogeneously expressed in Bacillus subtilis WB800 for the first time. The enzyme exists as a monomer with 303 amino acids and a molecular mass of 33.6 kDa. Its specific activity was 377.9 ± 10.3 U/ (mg protein), using methyl ferulate as a substrate. It displays an optimal alkaline pH of 9.0, an optimal temperature of 50 °C, and half-lives of 1434, 327, 235, and 68 min at 50, 55, 60, and 65 °C, respectively. Moreover, the purified BpFAE released 4.98% FA of the alkali-acidic extractable FA from de-starched wheat bran (DSWB). When the DSWB was enzymatically degraded by the synergistic effect of the BpFAE and commercial xylanase, the FA amount reached 49.47%. It suggested that the alkaline BpFAE from B. pumilus SK52.001, which was heterologously expressed in B. subtilis WB800, possesses great potential for biomass degradation and achieving high-added value FA production from food by-products.
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Affiliation(s)
- Xiaoli Duan
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (X.D.); (Y.D.)
| | - Yiwei Dai
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (X.D.); (Y.D.)
| | - Tao Zhang
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi 214122, China; (X.D.); (Y.D.)
- International Joint Laboratory on Food Safety, Jiangnan University, Wuxi 214122, China
- Correspondence:
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Lignin extraction from waste biomass with deep eutectic solvents: Molecular weight and heating value. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2021. [DOI: 10.1016/j.bcab.2021.101949] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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