51
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Zheng Y, Shi J, Tu M, Cheng YS. Principles and Development of Lignocellulosic Biomass Pretreatment for Biofuels. ADVANCES IN BIOENERGY 2017. [DOI: 10.1016/bs.aibe.2017.03.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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52
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Barisik G, Isci A, Kutlu N, Bagder Elmaci S, Akay B. Optimization of organic acid pretreatment of wheat straw. Biotechnol Prog 2016; 32:1487-1493. [DOI: 10.1002/btpr.2347] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 07/25/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Gizem Barisik
- Faculty of Engineering, Food Engineering Dept.; Ankara University; Diskapi Ankara Turkey
| | - Asli Isci
- Faculty of Engineering, Food Engineering Dept.; Ankara University; Diskapi Ankara Turkey
| | - Naciye Kutlu
- Faculty of Engineering, Food Engineering Dept.; Ankara University; Diskapi Ankara Turkey
| | - Simel Bagder Elmaci
- Faculty of Engineering, Food Engineering Dept.; Ankara University; Diskapi Ankara Turkey
| | - Bulent Akay
- Faculty of Engineering, Chemical Engineering Dept.; Ankara University; Tandogan Ankara Turkey
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53
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Kim JE, Lee JW. Improved Ethanol Production from Deacetylated Yellow Poplar (Liriodendron tulipifera) by Detoxification of Hydrolysate and Semi-SSF. KOREAN CHEMICAL ENGINEERING RESEARCH 2016. [DOI: 10.9713/kcer.2016.54.4.494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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54
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Cam Y, Alkim C, Trichez D, Trebosc V, Vax A, Bartolo F, Besse P, François JM, Walther T. Engineering of a Synthetic Metabolic Pathway for the Assimilation of (d)-Xylose into Value-Added Chemicals. ACS Synth Biol 2016; 5:607-18. [PMID: 26186096 DOI: 10.1021/acssynbio.5b00103] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
A synthetic pathway for (d)-xylose assimilation was stoichiometrically evaluated and implemented in Escherichia coli strains. The pathway proceeds via isomerization of (d)-xylose to (d)-xylulose, phosphorylation of (d)-xylulose to obtain (d)-xylulose-1-phosphate (X1P), and aldolytic cleavage of the latter to yield glycolaldehyde and DHAP. Stoichiometric analyses showed that this pathway provides access to ethylene glycol with a theoretical molar yield of 1. Alternatively, both glycolaldehyde and DHAP can be converted to glycolic acid with a theoretical yield that is 20% higher than for the exclusive production of this acid via the glyoxylate shunt. Simultaneous expression of xylulose-1 kinase and X1P aldolase activities, provided by human ketohexokinase-C and human aldolase-B, respectively, restored growth of a (d)-xylulose-5-kinase mutant on xylose. This strain produced ethylene glycol as the major metabolic endproduct. Metabolic engineering provided strains that assimilated the entire C2 fraction into the central metabolism or that produced 4.3 g/L glycolic acid at a molar yield of 0.9 in shake flasks.
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Affiliation(s)
- Yvan Cam
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP),, 31077 Toulouse, France
- UMR5504, CNRS, 31077 Toulouse, France
- TWB, 3 rue des Satellites, Canal Biotech Building 2, 31400 Toulouse, France
| | - Ceren Alkim
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP),, 31077 Toulouse, France
- UMR5504, CNRS, 31077 Toulouse, France
- TWB, 3 rue des Satellites, Canal Biotech Building 2, 31400 Toulouse, France
| | - Debora Trichez
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP),, 31077 Toulouse, France
- UMR5504, CNRS, 31077 Toulouse, France
- TWB, 3 rue des Satellites, Canal Biotech Building 2, 31400 Toulouse, France
| | - Vincent Trebosc
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP),, 31077 Toulouse, France
- UMR5504, CNRS, 31077 Toulouse, France
- TWB, 3 rue des Satellites, Canal Biotech Building 2, 31400 Toulouse, France
| | - Amélie Vax
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP),, 31077 Toulouse, France
- UMR5504, CNRS, 31077 Toulouse, France
- TWB, 3 rue des Satellites, Canal Biotech Building 2, 31400 Toulouse, France
| | - François Bartolo
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- Département Génie Mathématiques et Modélisation (GMM), 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Philippe Besse
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- Département Génie Mathématiques et Modélisation (GMM), 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Jean Marie François
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP),, 31077 Toulouse, France
- UMR5504, CNRS, 31077 Toulouse, France
- TWB, 3 rue des Satellites, Canal Biotech Building 2, 31400 Toulouse, France
| | - Thomas Walther
- INSA, UPS, INP, LISBP, Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
- INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés (LISBP),, 31077 Toulouse, France
- UMR5504, CNRS, 31077 Toulouse, France
- TWB, 3 rue des Satellites, Canal Biotech Building 2, 31400 Toulouse, France
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55
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Neves PV, Pitarelo AP, Ramos LP. Production of cellulosic ethanol from sugarcane bagasse by steam explosion: Effect of extractives content, acid catalysis and different fermentation technologies. BIORESOURCE TECHNOLOGY 2016; 208:184-194. [PMID: 26943936 DOI: 10.1016/j.biortech.2016.02.085] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 02/17/2016] [Accepted: 02/18/2016] [Indexed: 06/05/2023]
Abstract
The production of cellulosic ethanol was carried out using samples of native (NCB) and ethanol-extracted (EECB) sugarcane bagasse. Autohydrolysis (AH) exhibited the best glucose recovery from both samples, compared to the use of both H3PO4 and H2SO4 catalysis at the same pretreatment time and temperature. All water-insoluble steam-exploded materials (SEB-WI) resulted in high glucose yields by enzymatic hydrolysis. SHF (separate hydrolysis and fermentation) gave ethanol yields higher than those obtained by SSF (simultaneous hydrolysis and fermentation) and pSSF (pre-hydrolysis followed by SSF). For instance, AH gave 25, 18 and 16 g L(-1) of ethanol by SHF, SSF and pSSF, respectively. However, when the total processing time was taken into account, pSSF provided the best overall ethanol volumetric productivity of 0.58 g L(-1) h(-1). Also, the removal of ethanol-extractable materials from cane bagasse had no influence on the cellulosic ethanol production of SEB-WI, regardless of the fermentation strategy used for conversion.
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Affiliation(s)
- P V Neves
- Research Center in Applied Chemistry (CEPESQ), Department of Chemistry, Federal University of Paraná, Curitiba, PR, Brazil
| | - A P Pitarelo
- Research Center in Applied Chemistry (CEPESQ), Department of Chemistry, Federal University of Paraná, Curitiba, PR, Brazil; Sugarcane Technology Center (CTC), Piracicaba, SP, Brazil
| | - L P Ramos
- Research Center in Applied Chemistry (CEPESQ), Department of Chemistry, Federal University of Paraná, Curitiba, PR, Brazil.
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56
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Kundu C, Jeong SY, Lee JW. Bioethanol production from deacetylated yellow poplar pretreated with oxalic acid recovered through electrodialysis. BIORESOURCE TECHNOLOGY 2016; 208:170-177. [PMID: 26943934 DOI: 10.1016/j.biortech.2016.02.100] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 02/20/2016] [Accepted: 02/22/2016] [Indexed: 06/05/2023]
Abstract
Electrodialysis (ED) was used to develop a multistage oxalic acid recovery and pretreatment system to produce ethanol from deacetylated yellow poplar. Pretreatment of the biomass was performed at 150°C for 42 min using 0.16 M oxalic acid. The efficiency of oxalic acid recovery from the hydrolysate reached up to 92.32% in all the stages. Ethanol production and ethanol yield of ED-treated hydrolysate in each stage showed a uniform pattern ranging from 6.81 g/L to 7.21 g/L and 0.40 g/g to 0.43 g/g, respectively. The results showed that efficiency of ethanol production increased when deacetylated biomass and ED process was used. Ethanol yield from the pretreated biomass using simultaneous saccharification and fermentation (SSF) was in the range of 80.59-83.36% in all the stages. The structural characterization of the pretreated biomass at each stage was investigated and structural changes were not significantly different among the various pretreated biomass.
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Affiliation(s)
- Chandan Kundu
- Department of Forest Products and Technology, College of Agriculture and Life Sciences, Chonnam National University, Gwang-ju 500-757, Republic of Korea
| | - So-Yeon Jeong
- Department of Forest Products and Technology, College of Agriculture and Life Sciences, Chonnam National University, Gwang-ju 500-757, Republic of Korea
| | - Jae-Won Lee
- Department of Forest Products and Technology, College of Agriculture and Life Sciences, Chonnam National University, Gwang-ju 500-757, Republic of Korea.
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57
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Schneider L, Haverinen J, Jaakkola M, Lassi U. Solid acid-catalyzed depolymerization of barley straw driven by ball milling. BIORESOURCE TECHNOLOGY 2016; 206:204-210. [PMID: 26859328 DOI: 10.1016/j.biortech.2016.01.095] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 01/22/2016] [Accepted: 01/25/2016] [Indexed: 06/05/2023]
Abstract
This study describes a time and energy saving, solvent-free procedure for the conversion of lignocellulosic barley straw into reducing sugars by mechanocatalytical pretreatment. The catalytic conversion efficiency of several solid acids was tested which revealed oxalic acid dihydrate as a potential catalyst with high conversion rate. Samples were mechanically treated by ball milling and subsequently hydrolyzed at different temperatures. The parameters of the mechanical treatment were optimized in order to obtain sufficient amount of total reducing sugar (TRS) which was determined following the DNS assay. Additionally, capillary electrophoresis (CE) and Fourier transform infrared spectrometry (FT-IR) were carried out. Under optimal conditions TRS 42% was released using oxalic acid dihydrate as a catalyst. This study revealed that the acid strength plays an important role in the depolymerization of barley straw and in addition, showed, that the oxalic acid-catalyzed reaction generates low level of the degradation product 5-hydroxymethylfurfural (HMF).
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Affiliation(s)
- Laura Schneider
- University of Oulu, Research Unit of Sustainable Chemistry, P.O. Box 3000, FIN-90014 Oulu, Finland; University of Jyvaskyla, Kokkola University Consortium Chydenius, FI-67100 Kokkola, Finland
| | - Jasmiina Haverinen
- University of Oulu, Kajaani University Consortium, CEMIS-Oulu, FI-87400 Kajaani, Finland
| | - Mari Jaakkola
- University of Oulu, Kajaani University Consortium, CEMIS-Oulu, FI-87400 Kajaani, Finland
| | - Ulla Lassi
- University of Oulu, Research Unit of Sustainable Chemistry, P.O. Box 3000, FIN-90014 Oulu, Finland; University of Jyvaskyla, Kokkola University Consortium Chydenius, FI-67100 Kokkola, Finland.
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58
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Rabemanolontsoa H, Saka S. Various pretreatments of lignocellulosics. BIORESOURCE TECHNOLOGY 2016; 199:83-91. [PMID: 26316403 DOI: 10.1016/j.biortech.2015.08.029] [Citation(s) in RCA: 127] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Revised: 08/09/2015] [Accepted: 08/10/2015] [Indexed: 05/09/2023]
Abstract
Biomass pretreatment for depolymerizing lignocellulosics to fermentable sugars has been studied for nearly 200 years. Researches have aimed at high sugar production with minimal degradation to inhibitory compounds. Chemical, physico-chemical and biochemical conversions are the most promising technologies. This article reviews the advances and current trends in the pretreatment of lignocellulosics for a prosperous biorefinery.
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Affiliation(s)
- Harifara Rabemanolontsoa
- Department of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan
| | - Shiro Saka
- Department of Socio-Environmental Energy Science, Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan.
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59
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Jeong SY, Lee JW. Sequential Fenton oxidation and hydrothermal treatment to improve the effect of pretreatment and enzymatic hydrolysis on mixed hardwood. BIORESOURCE TECHNOLOGY 2016; 200:121-127. [PMID: 26476172 DOI: 10.1016/j.biortech.2015.10.015] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 10/06/2015] [Accepted: 10/07/2015] [Indexed: 06/05/2023]
Abstract
Sequential Fenton oxidation (FO) and hydrothermal treatment were performed to improve the effect of pretreatment and enzymatic hydrolysis of mixed hardwood. The molar ratio of the Fenton reagent (FeSO4·7H2O and H2O2) was 1:25, and the reaction time was 96h. During the reaction, little or no weight loss of biomass was observed. The concentration of Fe(2+) was determined and was found to increase continuously during FO. Hydrothermal treatment at 190-210°C for 10-80min was performed following FO. Sequential FO and hydrothermal treatment showed positive effects on pretreatment and enzymatic hydrolysis. Xylose concentration in the hydrolysate was as high as 14.16g/L when FO-treated biomass was treated at 190°C, while its concentration in the raw material was 3.72g/L. After 96h of enzymatic hydrolysis, cellulose conversion in the biomass obtained following sequential treatment was 69.58-79.54%. In contrast, the conversion in the raw material (without FO) was 64.41-67.92%.
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Affiliation(s)
- So-Yeon Jeong
- Department of Forest Products and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Jae-Won Lee
- Department of Forest Products and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea.
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60
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Kundu C, Lee JW. Optimization conditions for oxalic acid pretreatment of deacetylated yellow poplar for ethanol production. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2015.09.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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61
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Affiliation(s)
- Shimin Kang
- Hawaii Natural
Energy Institute, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
| | - Jian Yu
- Hawaii Natural
Energy Institute, University of Hawaii at Manoa, Honolulu, Hawaii 96822, United States
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62
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Maurya DP, Singla A, Negi S. An overview of key pretreatment processes for biological conversion of lignocellulosic biomass to bioethanol. 3 Biotech 2015; 5:597-609. [PMID: 28324530 PMCID: PMC4569620 DOI: 10.1007/s13205-015-0279-4] [Citation(s) in RCA: 116] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Accepted: 01/21/2015] [Indexed: 11/29/2022] Open
Abstract
Second-generation bioethanol can be produced from various lignocellulosic biomasses such as wood, agricultural or forest residues. Lignocellulosic biomass is inexpensive, renewable and abundant source for bioethanol production. The conversion of lignocellulosic biomass to bioethanol could be a promising technology though the process has several challenges and limitations such as biomass transport and handling, and efficient pretreatment methods for total delignification of lignocellulosics. Proper pretreatment methods can increase concentrations of fermentable sugars after enzymatic saccharification, thereby improving the efficiency of the whole process. Conversion of glucose as well as xylose to bioethanol needs some new fermentation technologies to make the whole process inexpensive. The main goal of pretreatment is to increase the digestibility of maximum available sugars. Each pretreatment process has a specific effect on the cellulose, hemicellulose and lignin fraction; thus, different pretreatment methods and conditions should be chosen according to the process configuration selected for the subsequent hydrolysis and fermentation steps. The cost of ethanol production from lignocellulosic biomass in current technologies is relatively high. Additionally, low yield still remains as one of the main challenges. This paper reviews the various technologies for maximum conversion of cellulose and hemicelluloses fraction to ethanol, and it point outs several key properties that should be targeted for low cost and maximum yield.
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Affiliation(s)
- Devendra Prasad Maurya
- Department of Biochemistry and Biochemical Engineering, Sam Higginbottom Institute of Agriculture, Technology and Sciences, Allahabad, 211-007, Uttar Pradesh, India
| | - Ankit Singla
- Department of Microbiology and Fermentation Technology, Sam Higginbottom Institute of Agriculture, Technology and Sciences, Allahabad, 211-007, Uttar Pradesh, India.
| | - Sangeeta Negi
- Department of Biotechnology, Motilal Nehru National Institute of Technology, Allahabad, 211-004, Uttar Pradesh, India
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63
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Olsen C, Arantes V, Saddler J. Optimization of chip size and moisture content to obtain high, combined sugar recovery after sulfur dioxide-catalyzed steam pretreatment of softwood and enzymatic hydrolysis of the cellulosic component. BIORESOURCE TECHNOLOGY 2015; 187:288-298. [PMID: 25863206 DOI: 10.1016/j.biortech.2015.03.084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 03/18/2015] [Accepted: 03/19/2015] [Indexed: 06/04/2023]
Abstract
The influence of chip size and moisture content on the combined sugar recovery after steam pretreatment of lodgepole pine and subsequent enzymatic hydrolysis of the cellulosic component were investigated using response surface methodology. Chip size had little influence on sugar recovery after both steam pretreatment and enzymatic hydrolysis. In contrast, the moisture of the chips greatly influenced the relative severity of steam pretreatment and, as a result, the combined sugar recovery from the hemicellulosic and cellulosic fractions. Irrespective of chip size and the pretreatment temperature, time, and SO2 loading that were used, the relative severity of pretreatment was highest at a moisture of 30-40w/w%. However, the predictive model indicated that an elevated moisture content of roughly 50w/w% (about the moisture content of a standard softwood mill chip) would result in the highest, combined sugar recovery (80%) over the widest range of steam pretreatment conditions.
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Affiliation(s)
- Colin Olsen
- Neucel Specialty Cellulose Ltd, PO Box 2000, 300 Marine Drive, Port Alice, BC V0N 2N0, Canada.
| | - Valdeir Arantes
- Lorena School of Engineering, University of São Paulo Estrada Municipal do Campinho s/n, CP 116, 12602-810 Lorena, SP, Brazil.
| | - Jack Saddler
- Forestry Products Biotechnology/Bioenergy Group, Faculty of Forestry, University of British Columbia, 2424 Main Mall, Vancouver, BC V6T 1Z4, Canada.
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64
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Goswami M, Meena S, Navatha S, Prasanna Rani KN, Pandey A, Sukumaran RK, Prasad RBN, Prabhavathi Devi BLA. Hydrolysis of biomass using a reusable solid carbon acid catalyst and fermentation of the catalytic hydrolysate to ethanol. BIORESOURCE TECHNOLOGY 2015; 188:99-102. [PMID: 25777067 DOI: 10.1016/j.biortech.2015.03.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 02/28/2015] [Accepted: 03/02/2015] [Indexed: 06/04/2023]
Abstract
Solid acid catalysts can hydrolyze cellulose with lower reaction times and are easy to recover and reuse. A glycerol based carbon acid catalyst developed at CSIR-IICT performed well in acid catalysis reactions and hence this study was undertaken to evaluate the catalyst for hydrolysis of biomass (alkali pretreated or native rice straw). The catalyst could release 262 mg/g total reducing sugars (TRS) in 4h at 140 °C from alkali pretreated rice straw, and more importantly it released 147 mg/g TRS from native biomass. Reusability of the catalyst was also demonstrated. Catalytic hydrolysate was used as sugar source for fermentation to produce ethanol. Results indicate the solid acid catalyst as an interesting option for biomass hydrolysis.
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Affiliation(s)
- Mandavi Goswami
- Centre for Biofuels, Biotechnology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019, India
| | - S Meena
- Centre for Biofuels, Biotechnology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019, India
| | - S Navatha
- Centre for Lipid Research, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - K N Prasanna Rani
- Centre for Lipid Research, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Ashok Pandey
- Centre for Biofuels, Biotechnology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019, India
| | - Rajeev Kumar Sukumaran
- Centre for Biofuels, Biotechnology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram 695 019, India
| | - R B N Prasad
- Centre for Lipid Research, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - B L A Prabhavathi Devi
- Centre for Lipid Research, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India.
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65
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da Silva Lacerda V, López-Sotelo JB, Correa-Guimarães A, Hernández-Navarro S, Sánchez-Bascones M, Navas-Gracia LM, Martín-Ramos P, Pérez-Lebeña E, Martín-Gil J. A kinetic study on microwave-assisted conversion of cellulose and lignocellulosic waste into hydroxymethylfurfural/furfural. BIORESOURCE TECHNOLOGY 2015; 180:88-96. [PMID: 25590423 DOI: 10.1016/j.biortech.2014.12.089] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 12/23/2014] [Accepted: 12/24/2014] [Indexed: 06/04/2023]
Abstract
Native cellulose, lignocellulosic materials from Brazil (carnauba palm leaves and macauba pulp and shell) and pine nut shell from Spain have been studied as substrates for the production of HMF and furfural in a conventional microwave oven. In order to promote the dissolution of native cellulose, several ionic liquids, catalysts, organic solvents and water doses have been assessed. The most suitable mixture (5mL of choline chloride/oxalic acid, 2mL of sulfolane, 2mL of water, 0.02g of TiO2 and 0.1g of substrate) has been chosen to conduct kinetic studies at different reaction times (5-60min) and various temperatures (120-200°C) and to evaluate the best conditions for HMF+furfural production according to Seaman's model. The best production yields of HMF+furfural have been attained for native cellulose, with a yield of 53.24% when an ultrasonic pretreatment was used prior to a microwave treatment with stirring.
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Affiliation(s)
- Viviane da Silva Lacerda
- Department of Agricultural and Forestry Engineering, Higher Technical School of Agricultural Engineering, University of Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain
| | - Juan Benito López-Sotelo
- Department of Agricultural and Forestry Engineering, Higher Technical School of Agricultural Engineering, University of Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain
| | - Adriana Correa-Guimarães
- Department of Agricultural and Forestry Engineering, Higher Technical School of Agricultural Engineering, University of Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain
| | - Salvador Hernández-Navarro
- Department of Agricultural and Forestry Engineering, Higher Technical School of Agricultural Engineering, University of Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain
| | - Mercedes Sánchez-Bascones
- Department of Agricultural and Forestry Engineering, Higher Technical School of Agricultural Engineering, University of Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain
| | - Luis M Navas-Gracia
- Department of Agricultural and Forestry Engineering, Higher Technical School of Agricultural Engineering, University of Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain
| | - Pablo Martín-Ramos
- Department of Agricultural and Forestry Engineering, Higher Technical School of Agricultural Engineering, University of Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain
| | - Eduardo Pérez-Lebeña
- Department of Agricultural and Forestry Engineering, Higher Technical School of Agricultural Engineering, University of Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain
| | - Jesús Martín-Gil
- Department of Agricultural and Forestry Engineering, Higher Technical School of Agricultural Engineering, University of Valladolid, Avenida de Madrid 44, 34004 Palencia, Spain.
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66
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Kundu C, Lee HJ, Lee JW. Enhanced bioethanol production from yellow poplar by deacetylation and oxalic acid pretreatment without detoxification. BIORESOURCE TECHNOLOGY 2015; 178:28-35. [PMID: 25205056 DOI: 10.1016/j.biortech.2014.08.082] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 08/13/2014] [Accepted: 08/14/2014] [Indexed: 06/03/2023]
Abstract
In order to produce ethanol from yellow poplar, deacetylation was performed using sodium hydroxide (NaOH). Optimal deacetylation conditions were determined by a response surface methodology. The highest acetic acid concentration obtained was 7.06 g/L when deacetylation was performed at 60 °C for 80 min with 0.8% NaOH. Acetic acid was recovered by electrodialysis from the deacetylated hydrolysate. The oxalic acid pretreatment of deacetylated biomass was carried out and the hydrolysate directly used for ethanol production without detoxification. Ethanol yields ranged from 0.34 to 0.47 g/g and the highest ethanol yield was obtained when pretreatment was carried out at 150 °C with 50 mM oxalic acid. The highest ethanol concentration obtained from pretreated biomass was 27.21 g/L at 170 °C, using a 50 mM of oxalic acid for the simultaneous saccharification and fermentation (SSF). Overall, 20.31 g of ethanol was obtained by hydrolysate and SSF from 100 g of deacetylated yellow poplar.
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Affiliation(s)
- Chandan Kundu
- Department of Forest Products and Technology, College of Agriculture and Life Sciences, Chonnam National University, Gwang-ju 500-757, Republic of Korea
| | - Hong-Joo Lee
- Department of Bioenergy Science and Technology, College of Agriculture and Life Sciences, Chonnam National University, Gwang-ju 500-757, Republic of Korea
| | - Jae-Won Lee
- Department of Forest Products and Technology, College of Agriculture and Life Sciences, Chonnam National University, Gwang-ju 500-757, Republic of Korea.
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Deng A, Ren J, Li H, Peng F, Sun R. Corncob lignocellulose for the production of furfural by hydrothermal pretreatment and heterogeneous catalytic process. RSC Adv 2015. [DOI: 10.1039/c5ra10472f] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this paper, an environmentally-friendly two-step process for furfural production was developed by the hydrothermal pretreatment of corncob and the heterogeneous catalysis of the hydrolysate using a solid acid catalyst.
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Affiliation(s)
- Aojie Deng
- State Key Laboratory of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou
- China
| | - Junli Ren
- State Key Laboratory of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou
- China
| | - Huiling Li
- State Key Laboratory of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou
- China
| | - Feng Peng
- Institute of Biomass Chemistry and Technology
- College of Materials Science and Technology
- Beijing Forestry University
- Beijing
- China
| | - Runcang Sun
- State Key Laboratory of Pulp and Paper Engineering
- South China University of Technology
- Guangzhou
- China
- Institute of Biomass Chemistry and Technology
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68
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Imman S, Arnthong J, Burapatana V, Champreda V, Laosiripojana N. Effects of acid and alkali promoters on compressed liquid hot water pretreatment of rice straw. BIORESOURCE TECHNOLOGY 2014; 171:29-36. [PMID: 25181697 DOI: 10.1016/j.biortech.2014.08.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2014] [Revised: 08/03/2014] [Accepted: 08/04/2014] [Indexed: 06/03/2023]
Abstract
In this study, effects of homogeneous acid and alkali promoters on efficiency and selectivity of LHW pretreatment of rice straw were studied. The presences of acid (0.25%v/v H2SO4, HCl, H3PO4, and oxalic acid) and alkali (0.25 w/v NaOH) efficiently promoted hydrolysis of hemicellulose, improved enzymatic digestibility of the solids, and lower the required LHW temperature. Oxalic acid was a superior promoter under the optimal LHW conditions at 160 °C, leading to the highest glucose yield from enzymatic hydrolysis (84.2%) and the lowest formation of furans. Combined with hydrolyzed glucose in the liquid, this resulted in the maximal 91.6% glucose recovery from the native rice straw. This was related to changes in surface area and crystallinity of pretreated biomass. The results showed efficiency of external promoters on increasing sugar recovery and saving energy in LHW pretreatment.
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Affiliation(s)
- Saksit Imman
- The Joint Graduate School for Energy and Environment (JGSEE), King Mongkut's University of Technology Thonburi, Prachauthit Road, Bangmod, Bangkok 10140, Thailand
| | - Jantima Arnthong
- Enzyme Technology Laboratory, National Center for Genetic Engineering and Biotechnology, 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand
| | - Vorakan Burapatana
- PTT Research and Technology Institute, Phahonyothin Road KM. 78, Wang Noi, Phra Nakhon Si Ayutthaya 13170, Thailand
| | - Verawat Champreda
- Enzyme Technology Laboratory, National Center for Genetic Engineering and Biotechnology, 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani 12120, Thailand.
| | - Navadol Laosiripojana
- The Joint Graduate School for Energy and Environment (JGSEE), King Mongkut's University of Technology Thonburi, Prachauthit Road, Bangmod, Bangkok 10140, Thailand
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69
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Conversion of lignocellulosic biomass to nanocellulose: structure and chemical process. ScientificWorldJournal 2014; 2014:631013. [PMID: 25247208 PMCID: PMC4163452 DOI: 10.1155/2014/631013] [Citation(s) in RCA: 141] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 07/17/2014] [Indexed: 11/20/2022] Open
Abstract
Lignocellulosic biomass is a complex biopolymer that is primary composed of cellulose, hemicellulose, and lignin. The presence of cellulose in biomass is able to depolymerise into nanodimension biomaterial, with exceptional mechanical properties for biocomposites, pharmaceutical carriers, and electronic substrate's application. However, the entangled biomass ultrastructure consists of inherent properties, such as strong lignin layers, low cellulose accessibility to chemicals, and high cellulose crystallinity, which inhibit the digestibility of the biomass for cellulose extraction. This situation offers both challenges and promises for the biomass biorefinery development to utilize the cellulose from lignocellulosic biomass. Thus, multistep biorefinery processes are necessary to ensure the deconstruction of noncellulosic content in lignocellulosic biomass, while maintaining cellulose product for further hydrolysis into nanocellulose material. In this review, we discuss the molecular structure basis for biomass recalcitrance, reengineering process of lignocellulosic biomass into nanocellulose via chemical, and novel catalytic approaches. Furthermore, review on catalyst design to overcome key barriers regarding the natural resistance of biomass will be presented herein.
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Trinh LTP, Kundu C, Lee JW, Lee HJ. An integrated detoxification process with electrodialysis and adsorption from the hemicellulose hydrolysates of yellow poplars. BIORESOURCE TECHNOLOGY 2014; 161:280-287. [PMID: 24713602 DOI: 10.1016/j.biortech.2014.03.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 03/08/2014] [Accepted: 03/12/2014] [Indexed: 06/03/2023]
Abstract
An integrated detoxification process with electrodialysis (ED) followed by adsorption was performed to remove fermentation inhibitors from hemicellulose hydrolysates. The hydrolysates were prepared by oxalic acid pretreatment of yellow poplars at different temperatures. Of fermentation inhibitors, acetic acid showed high removal efficiency of about 90% and high transport rate during the ED process without membrane fouling. The integration of the detoxification processes increased up to the ethanol yield of 0.33g/g sugar, the ethanol production of about 9g/L, and the productivity of 0.12g/Lh, while the fermentation of non-detoxified hydrolysates did not produce bioethanol. The influence of inhibitor concentration on the fermentability showed that HMF had the highest inhibition effect. The results clearly showed that an integrated detoxification process with ED followed by adsorption removed fermentation inhibitors with high efficiency and increased the fermentability of the oxalic acid pretreated hemicellulose hydrolysates.
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Affiliation(s)
- Ly Thi Phi Trinh
- Department of Bioenergy Science and Technology, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea; Research Institute for Biotechnology and Environment, Nong Lam University, Hochiminh City, Viet Nam
| | - Chandan Kundu
- Department of Forest Products and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Jae-Won Lee
- Department of Forest Products and Technology, Chonnam National University, Gwangju 500-757, Republic of Korea; Bioenergy Research Center, Chonnam National University, Gwangju 500-757, Republic of Korea
| | - Hong-Joo Lee
- Department of Bioenergy Science and Technology, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea.
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71
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Na BI, Lee JW. Study on the Hydrolysis Kinetics of Xylan on Different Acid Catalysts. KOREAN CHEMICAL ENGINEERING RESEARCH 2014. [DOI: 10.9713/kcer.2014.52.2.226] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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72
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Asgher M, Shahid M, Kamal S, Iqbal HMN. Recent trends and valorization of immobilization strategies and ligninolytic enzymes by industrial biotechnology. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.molcatb.2013.12.016] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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73
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Lee JW, Trinh LTP, Lee HJ. Removal of inhibitors from a hydrolysate of lignocellulosic biomass using electrodialysis. Sep Purif Technol 2014. [DOI: 10.1016/j.seppur.2013.11.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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74
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Jeong SY, Trinh LTP, Lee HJ, Lee JW. Improvement of the fermentability of oxalic acid hydrolysates by detoxification using electrodialysis and adsorption. BIORESOURCE TECHNOLOGY 2013; 152:444-449. [PMID: 24321607 DOI: 10.1016/j.biortech.2013.11.029] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2013] [Revised: 11/05/2013] [Accepted: 11/11/2013] [Indexed: 06/03/2023]
Abstract
A two-step detoxification process consisting of electrodialysis and adsorption was performed to improve the fermentability of oxalic acid hydrolysates. The constituents of the hydrolysate differed significantly between mixed hardwood and softwood. Acetic acid and furfural concentrations were high in the mixed hardwood, whereas 5-hydroxymethylfurfural (HMF) concentration was relatively low compared with that of the mixed softwood. The removal efficiency of acetic acid reached 100% by electrodialysis (ED) process in both hydrolysates, while those of furfural and HMF showed very low, due to non-ionizable properties. Most of the remaining inhibitors were removed by XAD-4 resin. In the mixed hardwood hydrolysate without removal of the inhibitors, ethanol fermentation was not completed. Meanwhile, both ED-treated hydrolysates successfully produced ethanol with 0.08 and 0.15 g/Lh ethanol productivity, respectively. The maximum ethanol productivity was attained after fermentation with 0.27 and 0.35 g/Lh of detoxified hydrolysates, which were treated by ED, followed by XAD-4 resin.
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Affiliation(s)
- So-Yeon Jeong
- Department of Forest Products and Technology, College of Agriculture & Life Sciences, Chonnam National University, Gwang-ju 500-757, South Korea
| | - Ly Thi Phi Trinh
- Department of Bioenergy Science and Technology, College of Agriculture & Life Sciences, Chonnam National University, Gwang-ju 500-757, South Korea
| | - Hong-Joo Lee
- Department of Bioenergy Science and Technology, College of Agriculture & Life Sciences, Chonnam National University, Gwang-ju 500-757, South Korea
| | - Jae-Won Lee
- Department of Forest Products and Technology, College of Agriculture & Life Sciences, Chonnam National University, Gwang-ju 500-757, South Korea; Bioenergy Research Center, Chonnam National University, Gwang-ju 500-757, South Korea.
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75
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Wolfrum EJ, Ness RM, Nagle NJ, Peterson DJ, Scarlata CJ. A laboratory-scale pretreatment and hydrolysis assay for determination of reactivity in cellulosic biomass feedstocks. BIOTECHNOLOGY FOR BIOFUELS 2013; 6:162. [PMID: 24229321 PMCID: PMC4176505 DOI: 10.1186/1754-6834-6-162] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 10/28/2013] [Indexed: 05/18/2023]
Abstract
BACKGROUND The rapid determination of the release of structural sugars from biomass feedstocks is an important enabling technology for the development of cellulosic biofuels. An assay that is used to determine sugar release for large numbers of samples must be robust, rapid, and easy to perform, and must use modest amounts of the samples to be tested.In this work we present a laboratory-scale combined pretreatment and saccharification assay that can be used as a biomass feedstock screening tool. The assay uses a commercially available automated solvent extraction system for pretreatment followed by a small-scale enzymatic hydrolysis step. The assay allows multiple samples to be screened simultaneously, and uses only ~3 g of biomass per sample. If the composition of the biomass sample is known, the results of the assay can be expressed as reactivity (fraction of structural carbohydrate present in the biomass sample released as monomeric sugars). RESULTS We first present pretreatment and enzymatic hydrolysis experiments on a set of representative biomass feedstock samples (corn stover, poplar, sorghum, switchgrass) in order to put the assay in context, and then show the results of the assay applied to approximately 150 different feedstock samples covering 5 different materials. From the compositional analysis data we identify a positive correlation between lignin and structural carbohydrates, and from the reactivity data we identify a negative correlation between both carbohydrate and lignin content and total reactivity. The negative correlation between lignin content and total reactivity suggests that lignin may interfere with sugar release, or that more mature samples (with higher structural sugars) may have more recalcitrant lignin. CONCLUSIONS The assay presented in this work provides a robust and straightforward method to measure the sugar release after pretreatment and saccharification that can be used as a biomass feedstock screening tool. We demonstrated the utility of the assay by identifying correlations between feedstock composition and reactivity in a population of 150 samples.
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Affiliation(s)
- Edward J Wolfrum
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA
| | - Ryan M Ness
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA
| | - Nicholas J Nagle
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA
| | - Darren J Peterson
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA
| | - Christopher J Scarlata
- National Bioenergy Center, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO 80401, USA
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76
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Lee HJ, Lim WS, Lee JW. Improvement of ethanol fermentation from lignocellulosic hydrolysates by the removal of inhibitors. J IND ENG CHEM 2013. [DOI: 10.1016/j.jiec.2013.03.014] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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77
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Chaturvedi V, Verma P. An overview of key pretreatment processes employed for bioconversion of lignocellulosic biomass into biofuels and value added products. 3 Biotech 2013; 3:415-431. [PMID: 28324338 PMCID: PMC3781263 DOI: 10.1007/s13205-013-0167-8] [Citation(s) in RCA: 167] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Accepted: 08/13/2013] [Indexed: 11/29/2022] Open
Abstract
The hunt for alternative sources of energy generation that are inexpensive, ecofriendly, renewable and can replace fossil fuels is on, owing to the increasing demands of energy. One approach in this direction is the conversion of plant residues into biofuels wherein lignocellulose, which forms the structural framework of plants consisting of cellulose, hemicellulose and lignin, is first broken down and hydrolyzed into simple fermentable sugars, which upon fermentation form biofuels such as ethanol. A major bottleneck is to disarray lignin which is present as a protective covering and makes cellulose and hemicellulose recalcitrant to enzymatic hydrolysis. A number of biomass deconstruction or pretreatment processes (physical, chemical and biological) have been used to break the structural framework of plants and depolymerize lignin. This review surveys and discusses some major pretreatment processes pertaining to the pretreatment of plant biomass, which are used for the production of biofuels and other value added products. The emphasis is given on processes that provide maximum amount of sugars, which are subsequently used for the production of biofuels.
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Affiliation(s)
- Venkatesh Chaturvedi
- School of Biotechnology, Banaras Hindu University, Varanasi, Uttar Pradesh India
| | - Pradeep Verma
- Department of Biotechnology, Guru Ghasidas Vishwavidyalaya, Bilaspur, Chhattisgarh India
- Present Address: Department of Microbiology, Central University of Rajasthan, N.H. 8 Bandarsindri, Kishangarh, Ajmer, Rajasthan India
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78
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de Vries S, Pustjens AM, Kabel MA, Salazar-Villanea S, Hendriks WH, Gerrits WJJ. Processing technologies and cell wall degrading enzymes to improve nutritional value of dried distillers grain with solubles for animal feed: an in vitro digestion study. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:8821-8. [PMID: 23964718 DOI: 10.1021/jf4019855] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Currently, the use of maize dried distillers grain with solubles (DDGS) as protein source in animal feed is limited by the inferior protein quality and high levels of non-starch polysaccharides (NSP). Processing technologies and enzymes that increase NSP degradability might improve digestive utilization of DDGS, enhancing its potential as a source of nutrients for animals. The effects of various combinations of processing technologies and commercial enzyme mixtures on in vitro digestion and subsequent fermentation of DDGS were tested. Wet-milling, extrusion, and mild hydrothermal acid treatment increased in vitro protein digestion but had no effect on NSP. Severe hydrothermal acid treatments, however, effectively solubilized NSP (48-78%). Addition of enzymes did not affect NSP solubilization in unprocessed or processed DDGS. Although the cell wall structure of DDGS seems to be resistant to most milder processing technologies, in vitro digestion of DDGS can be effectively increased by severe hydrothermal acid treatments.
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Affiliation(s)
- Sonja de Vries
- Animal Nutrition Group, Wageningen University , P.O. Box 338, 6700 AH Wageningen, The Netherlands
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79
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Seo YJ, Oh DS, Lee JW. Study on the possibility of waste mushroom medium as a biomass resource for biorefinery. J IND ENG CHEM 2013. [DOI: 10.1016/j.jiec.2013.01.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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80
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Tunc MS, Chheda J, van der Heide E, Morris J, van Heiningen A. Two-Stage Fractionation and Fiber Production of Lignocellulosic Biomass for Liquid Fuels and Chemicals. Ind Eng Chem Res 2013. [DOI: 10.1021/ie4016528] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Sefik Tunc
- Department of Chemical and Biological Engineering, University of Maine, Orono, Maine 04469, United States
- American Process Inc., Atlanta, Georgia 30308, United States
| | - Juben Chheda
- Shell Global Solutions (US) Inc., Houston, Texas 77082, United States
| | - Evert van der Heide
- Shell Global Solutions International B.V., Amsterdam, North Holland, The Netherlands
| | - Jerry Morris
- Shell Global Solutions (US) Inc., Houston, Texas 77082, United States
| | - Adriaan van Heiningen
- Department of Chemical and Biological Engineering, University of Maine, Orono, Maine 04469, United States
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81
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Duan X, Zhang C, Ju X, Li Q, Chen S, Wang J, Liu Z. Effect of lignocellulosic composition and structure on the bioethanol production from different poplar lines. BIORESOURCE TECHNOLOGY 2013; 140:363-7. [PMID: 23708852 DOI: 10.1016/j.biortech.2013.04.101] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 04/24/2013] [Accepted: 04/25/2013] [Indexed: 05/16/2023]
Abstract
Branches from three transgenic poplar lines and their wild type line 107 were used to study the effect of lignocellulosic composition and structure on the production of glucose and ethanol. Experimental results showed that the transgenic line 18-1 had the high cellulose content and amorphous fibril structure. After poplar meals were pretreated with 10% NaOH and a mixture of hydrogen peroxide and acetic acid, their lateral order index decreased significantly. The highest glucose yield in enzymatic hydrolysis and ethanol yield from the substrate of 18-1 was much higher than that from feedstock of 107 by 192.7% and 108.7%, respectively. Scanning electron microscopy images confirmed that lignocellulose from the 18-1 could be destroyed by chemicals more easily than those from other lines. These results demonstrated that changing lignocellulose structure could be more effective on improving the digestibility and enzymatic hydrolysis of poplar biomass than increasing the cellulose content in biomass.
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Affiliation(s)
- Xiaojian Duan
- Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, PR China
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82
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Lim WS, Lee JW. Influence of pretreatment condition on the fermentable sugar production and enzymatic hydrolysis of dilute acid-pretreated mixed softwood. BIORESOURCE TECHNOLOGY 2013; 140:306-311. [PMID: 23708848 DOI: 10.1016/j.biortech.2013.04.103] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2013] [Revised: 04/25/2013] [Accepted: 04/26/2013] [Indexed: 06/02/2023]
Abstract
In this study, the effects of different acid catalysts and pretreatment factors on the hydrolysis of mixed softwood were investigated over a range of thermochemical pretreatments. Maleic, oxalic, and sulfuric acids were each used, under different pretreatment conditions. The most influential factor for fermentable sugar production in the dicarboxylic acid pretreatment of softwood was the pH. Reaction temperature was the next significant factor. However, during sulfuric acid pretreatment, fermentable sugar production was more dependent on reaction temperature, than time or pH. Enzymatic hydrolysis yields differed, depending on acid catalyst and pretreatment factor, regardless of lignin content in pretreated biomass. The highest enzymatic hydrolysis yield was found following maleic acid pretreatment, which reached 61.23%. The trend in enzymatic hydrolysis yields that were detected concomitantly with pretreatment condition or type of acid catalyst was closely related to the fermentable sugar production in the hydrolysate.
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Affiliation(s)
- Woo-Seok Lim
- Department of Forest Products and Technology, BK21 Program, Chonnam National University, Gwangju 500-757, Republic of Korea
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83
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Lim WS, Kim JY, Kim HY, Choi JW, Choi IG, Lee JW. Structural properties of pretreated biomass from different acid pretreatments and their effects on simultaneous saccharification and ethanol fermentation. BIORESOURCE TECHNOLOGY 2013; 139:214-219. [PMID: 23665216 DOI: 10.1016/j.biortech.2013.04.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Revised: 04/03/2013] [Accepted: 04/03/2013] [Indexed: 06/02/2023]
Abstract
The aim of this study was to investigate the effects of different acid pretreatments on the hydrolysis of biomass and ethanol production. Maleic, oxalic, and sulfuric acids were used individually as catalysts. The fermentable sugar concentration in hydrolysate was high at more than 30 g/L, which obtained at the dicarboxylic acid pretreatment. On the structural change of pretreated biomass, the S/G ratio ranged from 1.7 to 2.0, which was lower than that of raw material. The amount of phenolic OH group was significantly increased by acid pretreatment, which ranged 17.5-32.8%, compared to 4.7% of the raw material. The amounts of phenolic OH group in lignin sensitively affected simultaneous saccharification and fermentation. The maleic acid pretreated biomass, which included 17.5% of the phenolic OH group, was very effective for attaining high glucose yields and ethanol yield, after simultaneous saccharification and fermentation. At the same time, the highest ethanol yield was 0.48.
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Affiliation(s)
- Woo-Seok Lim
- Department of Forest Products and Technology, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, Republic of Korea
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84
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Imman S, Arnthong J, Burapatana V, Laosiripojana N, Champreda V. Autohydrolysis of Tropical Agricultural Residues by Compressed Liquid Hot Water Pretreatment. Appl Biochem Biotechnol 2013; 170:1982-95. [DOI: 10.1007/s12010-013-0320-1] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 05/31/2013] [Indexed: 10/26/2022]
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85
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Mateo S, Puentes JG, Sánchez S, Moya AJ. Oligosaccharides and monomeric carbohydrates production from olive tree pruning biomass. Carbohydr Polym 2013; 93:416-23. [DOI: 10.1016/j.carbpol.2012.12.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 12/12/2012] [Accepted: 12/16/2012] [Indexed: 10/27/2022]
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86
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Lee JY, Ryu HJ, Oh KK. Acid-catalyzed hydrothermal severity on the fractionation of agricultural residues for xylose-rich hydrolyzates. BIORESOURCE TECHNOLOGY 2013; 132:84-90. [PMID: 23395759 DOI: 10.1016/j.biortech.2013.01.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2012] [Revised: 12/31/2012] [Accepted: 01/04/2013] [Indexed: 06/01/2023]
Abstract
The objective of this work was to investigate the feasibility of acid-catalyzed hydrothermal fractionation for maximum solubilization of the hemicellulosic portion of three agricultural residues. The fractionation conditions converted into combined severity factor (CS) in the range of 1.2-2.9. The highest hemicellulose yield of 87.88% was achieved when barley straw was fractionated at a CS of 2.19. However, the maximum glucose release of 15.29% was achieved for the case of rice straw. The maximum productions of various by-products were observed with the fractionation of rape straw: 0.88 g/L of 5-hydroxymethylfurfural (5-HMF), 2.16 g/L of furfural, 0.44 g/L of levulinic acid, 1.59 g/L of formic acid, and 3.06 g/L of acetic acid. The highest selectivities, a criterion for evaluating the fractionation of 21.55 for fractionated solid and 7.48 for liquid hydrolyzate were obtained from barley straw.
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Affiliation(s)
- Ji Ye Lee
- Department of Applied Chemical Engineering, Dankook University, Cheonan, Chungnam 330-714, Republic of Korea
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87
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Lim WS, Lee JW. Effects of pretreatment factors on fermentable sugar production and enzymatic hydrolysis of mixed hardwood. BIORESOURCE TECHNOLOGY 2013; 130:97-101. [PMID: 23306116 DOI: 10.1016/j.biortech.2012.11.122] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2012] [Revised: 11/29/2012] [Accepted: 11/30/2012] [Indexed: 05/25/2023]
Abstract
The aim of this study was to investigate the effects of different acid catalysts and pretreatment factors on the hydrolysis of biomass compounds over a range of thermochemical pretreatments; maleic, oxalic, and sulfuric acids were each used under different pretreatment conditions. The most influential factor for fermentable sugar production in the dicarboxylic acid-pretreated mixed hardwood was pH. Reaction time was the next significant factor followed by reaction temperature. However, fermentable sugar production was more dependent on reaction temperature than time during sulfuric acid pretreatment, whereas the effect of acid concentration was considerably lower. Maleic acid pretreatment was very effective for attaining high glucose yields after enzymatic hydrolysis. The highest enzymatic hydrolysis yield was found following maleic acid pretreatment, which reached 95.56%. The trend in enzymatic hydrolysis yields that were detected concomitantly with pretreatment condition or type of acid catalyst was closely related to xylose production in the hydrolysate.
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Affiliation(s)
- Woo-Seok Lim
- Department of Forest Products and Technology (BK21 Program), Chonnam National University, Gwangju 500-757, Republic of Korea
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88
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Lee HJ, Ahn SJ, Seo YJ, Lee JW. A feasibility study on the multistage process for the oxalic acid pretreatment of a lignocellulosic biomass using electrodialysis. BIORESOURCE TECHNOLOGY 2013; 130:211-217. [PMID: 23306131 DOI: 10.1016/j.biortech.2012.12.061] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Revised: 12/07/2012] [Accepted: 12/09/2012] [Indexed: 06/01/2023]
Abstract
The present study investigated the feasibility of the recovery and reuse oxalic acid in a multistage process for the pretreatment of a lignocellulosic biomass. Electrodialysis (ED), an electrochemical process using ion exchange membranes, was used to recover and reuse oxalic acid in the multistage process. The ED optimal condition for recover oxalic acid was potential of 10V and pH 2.2 in synthetic solutions. The recovery efficiency of oxalic acid from hydrolysates reached 100% at potential of 10V. The power consumption to treat 1mol of oxalic acid was estimated to be 41.0wh. At the same time, ethanol production increased up to 19g/L in the ED-treated hydrolysate, corresponding to ethanol productivity of 0.27g/L/h. It was clearly shown that bioethanol fermentation efficiency increased using the ED process, due to a small loss of fermentable sugar and a significantly high removal of inhibitory chemicals.
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Affiliation(s)
- Hong-Joo Lee
- Department of Bioenergy Science and Technology, Chonnam National University, 77 Yongbong-ro, Buk-gu, Gwangju 500-757, South Korea
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89
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Avci A, Saha BC, Dien BS, Kennedy GJ, Cotta MA. Response surface optimization of corn stover pretreatment using dilute phosphoric acid for enzymatic hydrolysis and ethanol production. BIORESOURCE TECHNOLOGY 2013; 130:603-12. [PMID: 23334017 DOI: 10.1016/j.biortech.2012.12.104] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 10/02/2012] [Accepted: 12/14/2012] [Indexed: 05/02/2023]
Abstract
Dilute H(3)PO(4) (0.0-2.0%, v/v) was used to pretreat corn stover (10%, w/w) for conversion to ethanol. Pretreatment conditions were optimized for temperature, acid loading, and time using central composite design. Optimal pretreatment conditions were chosen to promote sugar yields following enzymatic digestion while minimizing formation of furans, which are potent inhibitors of fermentation. The maximum glucose yield (85%) was obtained after enzymatic hydrolysis of corn stover pretreated with 0.5% (v/v) acid at 180°C for 15min while highest yield for xylose (91.4%) was observed from corn stover pretreated with 1% (v/v) acid at 160°C for 10min. About 26.4±0.1g ethanol was produced per L by recombinant Escherichia coli strain FBR5 from 55.1±1.0g sugars generated from enzymatically hydrolyzed corn stover (10%, w/w) pretreated under a balanced optimized condition (161.81°C, 0.78% acid, 9.78min) where only 0.4±0.0g furfural and 0.1±0.0 hydroxylmethyl furfural were produced.
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Affiliation(s)
- Ayse Avci
- Bioenergy Research Unit, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture(1), 1815 N. University Street, Peoria, IL 61604, USA.
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90
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Chemical Pretreatment Methods for the Production of Cellulosic Ethanol: Technologies and Innovations. INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING 2013. [DOI: 10.1155/2013/719607] [Citation(s) in RCA: 198] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Pretreatment of lignocellulose has received considerable research globally due to its influence on the technical, economic and environmental sustainability of cellulosic ethanol production. Some of the most promising pretreatment methods require the application of chemicals such as acids, alkali, salts, oxidants, and solvents. Thus, advances in research have enabled the development and integration of chemical-based pretreatment into proprietary ethanol production technologies in several pilot and demonstration plants globally, with potential to scale-up to commercial levels. This paper reviews known and emerging chemical pretreatment methods, highlighting recent findings and process innovations developed to offset inherent challenges via a range of interventions, notably, the combination of chemical pretreatment with other methods to improve carbohydrate preservation, reduce formation of degradation products, achieve high sugar yields at mild reaction conditions, reduce solvent loads and enzyme dose, reduce waste generation, and improve recovery of biomass components in pure forms. The use of chemicals such as ionic liquids, NMMO, and sulphite are promising once challenges in solvent recovery are overcome. For developing countries, alkali-based methods are relatively easy to deploy in decentralized, low-tech systems owing to advantages such as the requirement of simple reactors and the ease of operation.
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91
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Kayser H, Rodríguez-Ropero F, Leitner W, Fioroni M, María PDD. Mechanistic comparison of saccharide depolymerization catalyzed by dicarboxylic acids and glycosidases. RSC Adv 2013. [DOI: 10.1039/c3ra41307a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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92
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Amarasekara AS, Wiredu B. A comparison of dilute aqueous p-toluenesulfonic and sulfuric acid pretreatments and saccharification of corn stover at moderate temperatures and pressures. BIORESOURCE TECHNOLOGY 2012; 125:114-118. [PMID: 23026322 DOI: 10.1016/j.biortech.2012.08.112] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2012] [Revised: 07/21/2012] [Accepted: 08/24/2012] [Indexed: 06/01/2023]
Abstract
Single step pretreatment-saccharification of corn stover was investigated in aqueous p-toluenesulfonic and sulfuric acid media. Dilute aqueous solution of p-toluenesulfonic acid was a better catalyst than aqueous sulfuric acid of the same H(+) ion concentration for single step pretreatment-saccharification of corn stover at moderate temperatures and pressures. For example, 100mg corn stover heated at 150°C for 1h in 0.100 M H(+) aqueous sulfuric acid produced 64 μmol of total reducing sugars (TRS), whereas the sample heated in 0.100 M H(+)p-toluenesulfonic acid produced 165 μmol of TRS under identical conditions. Glucose yield showed a similar trend, as aq. sulfuric acid and p-toluene sulfonic acid media produced 29 and 35 μmol of glucose respectively after 2.5h. Higher catalytic activity of p-toluenesulfonic acid may be due to an interaction with biomass, supported by repulsion of hydrophobic tolyl group by the aqueous phase.
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Affiliation(s)
- Ananda S Amarasekara
- Department of Chemistry, Prairie View A&M University, Prairie View, TX 77446, USA.
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93
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Changes in the material characteristics of maize straw during the pretreatment process of methanation. J Biomed Biotechnol 2012; 2012:325426. [PMID: 23118505 PMCID: PMC3480280 DOI: 10.1155/2012/325426] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Revised: 07/30/2012] [Accepted: 07/30/2012] [Indexed: 11/18/2022] Open
Abstract
Pretreatment technology is important to the direct methanation of straw. This study used fresh water, four bacterium agents (stem rot agent, “result” microbe decomposition agent, straw pretreatment composite bacterium agent, and complex microorganism agent), biogas slurry, and two chemical reagents (sodium hydroxide and urea) as pretreatment promoters. Different treatments were performed, and the changes in the straw pH value, temperature, total solid (TS), volatile solid (VS), and carbon-nitrogen ratio (C/N ratio) under different pretreatment conditions were analyzed. The results showed that chemical promoters were more efficient than biological promoters in straw maturity. Pretreatment using sodium hydroxide induced the highest degree of straw maturity. However, its C/N ratio had to be reduced during fermentation. In contrast, the C/N ratio of the urea-pretreated straw was low and was easy to regulate when used as anaerobic digestion material. The biogas slurry pretreatment was followed by pretreatments using four different bacterium agents, among which the effect of the complex microorganism agent (BA4) was more efficient than the others. The current study is significant to the direct and efficient methanation of straw.
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94
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Pustjens AM, de Vries S, Gerrits WJJ, Kabel MA, Schols HA, Gruppen H. Residual carbohydrates from in vitro digested processed rapeseed ( Brassica napus ) meal. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2012; 60:8257-63. [PMID: 22800181 DOI: 10.1021/jf301160m] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Rapeseed meal (RSM) was subjected to different physical or chemical pretreatments to decrease residual, hard to degrade carbohydrates and to improve fermentability of RSM polysaccharides. Next, these pretreated samples were in vitro digested and fermented, with or without the addition of commercial pectinolytic enzymes. Remaining carbohydrates were quantified, and two physical characteristics were analyzed: (1) water-binding capacity (WBC) of the insoluble residue and (2) viscosity of the soluble fraction. Mild acid pretreatment in combination with commercial pectinolytic enzyme mixtures showed best digestion of RSM carbohydrates; only 32% of the total carbohydrate content remained. For most pretreatments, addition of commercial pectinolytic enzymes had the strongest effect on lowering the WBC of the in vitro incubated RSM. In the cases that less carbohydrate remained after in vitro digestion, the WBC of the residue decreased, and less gas seems to be produced during fermentation.
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Affiliation(s)
- Annemieke M Pustjens
- Laboratory of Food Chemistry, Wageningen University , Bomenweg 2, 6703 HD Wageningen, The Netherlands
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95
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96
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Jeong TS, Choi CH, Lee JY, Oh KK. Behaviors of glucose decomposition during acid-catalyzed hydrothermal hydrolysis of pretreated Gelidium amansii. BIORESOURCE TECHNOLOGY 2012; 116:435-440. [PMID: 22522017 DOI: 10.1016/j.biortech.2012.03.104] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2012] [Revised: 03/28/2012] [Accepted: 03/29/2012] [Indexed: 05/31/2023]
Abstract
Acid-catalyzed hydrothermal hydrolysis is one path to cellulosic glucose and subsequently to its dehydration end products such as hydroxymethyl furfural (HMF), formic acid and levulinic acid. The effect of sugar decomposition not only lowers the yield of fermentable sugars but also forms decomposition products that inhibit subsequent fermentation. The present experiments were conducted with four different acid catalysts (H(2)SO(4), HNO(3), HCl, and H(3)PO(4)) at various acid normalities (0.5-2.1N) in batch reactors at 180-210 °C. From the results, H(2)SO(4) was the most suitable catalyst for glucose production, but glucose decomposition occurred during the hydrolysis. The glucose production was maximized at 160.7 °C, 2.0% (w/v) H(2)SO(4), and 40 min, but resulted in a low glucan yield of 33.05% due to the decomposition reactions, which generated formic acid and levulinic acid. The highest concentration of levulinic acid, 7.82 g/L, was obtained at 181.2 °C, 2.0% (w/v) H(2)SO(4), and 40 min.
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Affiliation(s)
- Tae Su Jeong
- Department of Applied Chemical Engineering, Dankook University, Cheonan, Chungnam 330-714, Republic of Korea
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97
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Reaction mechanisms and kinetics of xylo-oligosaccharide hydrolysis by dicarboxylic acids. AIChE J 2012. [DOI: 10.1002/aic.13807] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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98
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Gütsch JS, Nousiainen T, Sixta H. Comparative evaluation of autohydrolysis and acid-catalyzed hydrolysis of Eucalyptus globulus wood. BIORESOURCE TECHNOLOGY 2012; 109:77-85. [PMID: 22297049 DOI: 10.1016/j.biortech.2012.01.018] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2011] [Revised: 01/05/2012] [Accepted: 01/06/2012] [Indexed: 05/31/2023]
Abstract
Three different acids (acetic, oxalic and sulfuric acid) were tested for their catalytic activity during the pretreatment of Eucalyptus globulus wood comparatively to autohydrolysis in order to extract valuable products prior to kraft pulping and to reduce lignin precipitation in the pretreatment step. The utilization of oxalic and sulfuric acid reduces treatment temperatures at a given wood yield as compared to autohydrolysis and acetic acid addition and thus decreases the insoluble lignin content in the hydrolyzates. Due to the high temperatures of autohydrolysis xylose dehydration to furfural occurs at high wood yield losses, while during acid catalyzed hydrolysis degradation of cellulose to glucose is more pronounced. The main difference between the acid catalyzed and non-catalyzed reaction constitutes the ratio of monomeric xylose and xylooligosaccharides in solution.
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99
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Sidiras D, Batzias F, Ranjan R, Tsapatsis M. Simulation and optimization of batch autohydrolysis of wheat straw to monosaccharides and oligosaccharides. BIORESOURCE TECHNOLOGY 2011; 102:10486-10492. [PMID: 21924605 DOI: 10.1016/j.biortech.2011.08.059] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2011] [Revised: 08/08/2011] [Accepted: 08/12/2011] [Indexed: 05/31/2023]
Abstract
Twenty-four non-isothermal wheat straw autohydrolysis experiments were performed in a batch reactor in order to support the development of a new kinetic model. An optimum of 76% w/w total xylose was obtained due to 5% w/w xylose degradation at 180 °C for 70 min. An optimum of 31% w/w total glucose was obtained due to 22% w/w glucose degradation at 240 °C for 82 min. The autohydrolysis of cellulose and hemicelluloses was simulated using a new kinetic model, in which a new phenomenological first-order reaction was introduced to take into account the increasing concentration of acids that are produced during the complex cascade of reactions. The new model simulated experimental results more accurately than the severity factor (R0) model.
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Affiliation(s)
- Dimitris Sidiras
- Laboratory of Simulation of Industrial Processes, Department of Industrial Management and Technology, University of Piraeus, 80 Karaoli & Dimitriou, GR 18534 Piraeus, Greece.
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100
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Zhou N, Zhang Y, Wu X, Gong X, Wang Q. Hydrolysis of Chlorella biomass for fermentable sugars in the presence of HCl and MgCl2. BIORESOURCE TECHNOLOGY 2011; 102:10158-61. [PMID: 21906940 DOI: 10.1016/j.biortech.2011.08.051] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2011] [Revised: 08/05/2011] [Accepted: 08/11/2011] [Indexed: 05/04/2023]
Abstract
When Chlorella biomass was hydrolyzed in the presence of 2% HCl and 2.5% MgCl(2), a sugar concentration of nearly 12%, and a sugar recovery of about 83% was obtained. Fermentation experiments demonstrated that glucose in the Chlorella biomass hydrolysates was converted into ethanol by Saccharomyces cerevisiae with a yield of 0.47 g g(-1), which is 91% of the theoretical yield. This chemical hydrolysis approach is thus a novel route for the hydrolysis of biomass to generate fermentable sugars.
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Affiliation(s)
- Na Zhou
- Key Laboratory for Green Chemical Technology of State Education Ministry, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
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