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Wu S, Shi S, Liu R, Wang C, Li J, Han L. The transformations of cellulose after concentrated sulfuric acid treatment and its impact on the enzymatic saccharification. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:36. [PMID: 36869393 PMCID: PMC9985267 DOI: 10.1186/s13068-023-02293-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Accepted: 02/28/2023] [Indexed: 03/05/2023]
Abstract
BACKGROUND The dense structure of cellulose lowers its reactivity and hinders its applications. Concentrated sulfuric acid is an ideal solvent to dissolve cellulose and thus has been used widely to treat cellulose. However, the changes of cellulose after reaction with concentrated sulfuric acid at near-limit S/L ratio and its effect on enzymatic saccharification still need further investigation. RESULTS In this study, the interactions between cellulose (Avicel) and 72% sulfuric acid at very low acid loading conditions of 1:2 to 1:3 (S/L ratio) were studied for the enhanced production of glucose. The Avicel gradually transformed from cellulose I structure to cellulose II structure during the sulfuric acid treatment. Other physicochemical characteristics of Avicel also changed dramatically, such as the degree of polymerization, particle size, crystallinity index, and surface morphology. After acid treatment, both the yield and productivity of glucose from cellulose increased significantly under a very low enzyme loading of 5 FPU/g-cellulose. The glucose yields for raw cellulose and acid-treated (30 min) were 57% and 85%, respectively. CONCLUSION Low loadings of concentrated sulfuric acid were proven to be effective to break the recalcitrance of cellulose for enzymatic saccharification. A positive correlation between cellulose CrI and glucose yield was found for concentrated sulfuric acid-treated cellulose, which was opposite to previous reports. Cellulose II content was found to be an important factor that affects the conversion of cellulose to glucose.
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Affiliation(s)
- Shengbo Wu
- Engineering Laboratory for Agro Biomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing, 100083, China
| | - Suan Shi
- Engineering Laboratory for Agro Biomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing, 100083, China.
| | - Ruotong Liu
- Engineering Laboratory for Agro Biomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing, 100083, China
| | - Chun Wang
- Engineering Laboratory for Agro Biomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing, 100083, China
| | - Jing Li
- School of Ecology and Environment, Beijing Technology and Business University, Beijing, 100048, China
| | - Lujia Han
- Engineering Laboratory for Agro Biomass Recycling & Valorizing, College of Engineering, China Agricultural University, Beijing, 100083, China
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Madadi M, Song G, Sun F, Sun C, Xia C, Zhang E, Karimi K, Tu M. Positive role of non-catalytic proteins on mitigating inhibitory effects of lignin and enhancing cellulase activity in enzymatic hydrolysis: Application, mechanism, and prospective. ENVIRONMENTAL RESEARCH 2022; 215:114291. [PMID: 36103929 DOI: 10.1016/j.envres.2022.114291] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 08/18/2022] [Accepted: 09/04/2022] [Indexed: 06/15/2023]
Abstract
Fermentable sugar production from lignocellulosic biomass has received considerable attention and has been dramatic progress recently. However, due to low enzymatic hydrolysis (EH) yields and rates, a high dosage of the costly enzyme is required, which is a bottleneck for commercial applications. Over the last decades, various strategies have been developed to reduce cellulase enzyme costs. The progress of the non-catalytic additive proteins in mitigating inhibition in EH is discussed in detail in this review. The low efficiency of EH is mostly due to soluble lignin compounds, insoluble lignin, and harsh thermal and mechanical conditions of the EH process. Adding non-catalytic proteins into the EH is considered a simple and efficient approach to boost hydrolysis yield. This review discussed the multiple mechanical steps involved in the EH process. The effect of physicochemical properties of modified lignin on EH and its interaction with cellulase and cellulose are identified and discussed, which include hydrogen bonding, hydrophobic, electrostatic, and cation-π interactions, as well as physical barriers. Moreover, the effects of different conditions of EH that lead to cellulase deactivation by thermal and mechanical mechanisms are also explained. Finally, recent advances in the development, potential mechanisms, and economic feasibility of non-catalytic proteins on EH are evaluated and perspectives are presented.
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Affiliation(s)
- Meysam Madadi
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Guojie Song
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Fubao Sun
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.
| | - Chihe Sun
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China
| | - Changlei Xia
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, International Innovation Center for Forest Chemicals and Materials, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing, Jiangsu, 210037, China
| | - Ezhen Zhang
- Institute of Agro-Products Processing Science and Technology, Guangxi Academy of Agricultural Sciences, Nanning, 530007, China
| | - Keikhosro Karimi
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Maobing Tu
- Department of Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH, 45221, United States
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3
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Madadi M, Bakr MM, Abdulkhani A, Zahoor, Asadollahi MA, Sun C, Sun F, Abomohra AEF. Alleviating lignin repolymerization by carbocation scavenger for effective production of fermentable sugars from combined liquid hot water and green-liquor pretreated softwood biomass. ENERGY CONVERSION AND MANAGEMENT 2022; 251:114956. [DOI: 10.1016/j.enconman.2021.114956] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Zhao J, Xu Y, Zhang M, Wang D. Integrating bran starch hydrolysates with alkaline pretreated soft wheat bran to boost sugar concentration. BIORESOURCE TECHNOLOGY 2020; 302:122826. [PMID: 32000133 DOI: 10.1016/j.biortech.2020.122826] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 01/13/2020] [Accepted: 01/14/2020] [Indexed: 05/17/2023]
Abstract
Soft wheat bran (SWB), one of the most abundant byproducts from the wheat milling industry, is a potential candidate for biofuel production. In this study, bran starch hydrolysates were separately integrated with dilute acid pretreated SWB and alkaline pretreated SWB to boost fermentable sugar concentration. Alkaline pretreatment showed higher sugar recoveries than acid pretreatment. Significant sugar degradation for acid pretreatment was observed when pretreatment temperature higher than 170 ℃. The optimal pretreatment condition was 15% solid loading with 0.08 mol/L NaOH at 150 ℃ for 20 min. The neutralization reaction between dilute alkaline and released acids reduced sugar decomposition and inhibitors formation. Integrating bran starch hydrolysates with alkaline pretreated SWB yielded the highest glucose concentration of 50.91 g/L and a total sugar concentration of 101.29 g/L.
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Affiliation(s)
- Jikai Zhao
- Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, KS 66506, United States
| | - Youjie Xu
- Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, KS 66506, United States
| | - Meng Zhang
- Department of Industrial and Manufacturing Systems Engineering, Kansas State University, Manhattan, KS 66506, United States
| | - Donghai Wang
- Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, KS 66506, United States.
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Abstract
Efficient pretreatment is a prerequisite for lignocellulosic biomass biorefinery due to the structure of lignocellulose. This study is a first-time investigation into the structural changes of Miscanthus biomass treated with 60Co γ-ray irradiation in different doses up to 1200 kGy. The structural properties of the treated sample have been systematically characterized by FTIR, thermogravimetric analysis (TGA), XRD, gel permeation chromatography (GPC), a laser particle size analyzer, SEM, an atomic force microscope (AFM), and NMR. The results show that irradiation treatment can partially destroy the intra- or inter-molecular hydrogen bonds of biomass. Irradiation treatment can also reduce particle size, narrow the distribution range, as well as increase the specific surface area of biomasses. Noticeably, the TGA stability of the treated biomass decreases with increasing absorbed doses. To respond to these structural changes, the treated biomass can be easily hydrolyzed by cellulases with a high yield of reducing sugars (557.58 mg/g biomass), much higher than that of the untreated sample. We conclude that irradiation treatment can damage biomass structure, a promising strategy for biomass biorefinery in the future.
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Chu Q, Song K, Wang J, Hu J, Chen X. Improving enzymatic saccharification of hardwood through lignin modification by carbocation scavengers and the underlying mechanisms. BIORESOURCE TECHNOLOGY 2019; 294:122216. [PMID: 31605916 DOI: 10.1016/j.biortech.2019.122216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 09/25/2019] [Accepted: 09/26/2019] [Indexed: 05/20/2023]
Abstract
In this work, the beneficial effect of carbocation scavenger additives on hardwood pretreatment was revealed by significantly improved biomass saccharification: cellulose hydrolysis yield was increased by over 15% after steam pretreatment of poplar, while that was enhanced by more than 48% after dilute acid pretreatment. Besides, the relative contributions of lignin towards enzyme binding and physical barrier effect for proposed mechanisms were quantified. Results indicated that the addition of carbocation scavenger, 2-naphthol-7-sulfonate, resulted in acid groups incorporation of 62.36 mmol/kg to lignin, which mitigated enzyme non-productive binding. Moreover, enlarged biomass porosity and reduced surface lignin coverage were detected through BET and XPS analysis, respectively, which mostly related to the diminished physical barrier effect of lignin. As a result, the lignin inhibitions were significantly suppressed through the addition of carbocation scavenger, giving rise to significantly improved enzymatic hydrolysis of hardwood.
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Affiliation(s)
- Qiulu Chu
- School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Kai Song
- Department of Environmental Engineering, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China.
| | - Jing Wang
- Guangdong Provincial Key Laboratory of Silviculture, Protection and Utilization, Guangdong Academy of Forestry, Guangzhou 510520, China
| | - Jinguang Hu
- Department of Chemical and Petroleum Engineering, University of Calgary, 2500 University Dr. NW, Calgary, AB T2N 1Z4, Canada
| | - Xueyan Chen
- School of Agricultural Equipment Engineering, Jiangsu University, Zhenjiang 212013, China
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Wang Z, Dien BS, Rausch KD, Tumbleson ME, Singh V. Improving ethanol yields with deacetylated and two-stage pretreated corn stover and sugarcane bagasse by blending commercial xylose-fermenting and wild type Saccharomyces yeast. BIORESOURCE TECHNOLOGY 2019; 282:103-109. [PMID: 30852329 DOI: 10.1016/j.biortech.2019.02.123] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 02/27/2019] [Accepted: 02/28/2019] [Indexed: 06/09/2023]
Abstract
Corn stover and sugarcane bagasse are the most widely available agriculture processing biomass and could serve as feedstocks for production of biofuel. In this study, three different technologies are combined to develop a more efficient conversion process for each of these feedstocks. The three technologies are diluted alkaline deacetylation process, combined thermochemical and mechanical shear pretreatment, and fermentation using a combined inoculum of two commercial Saccharomyces yeast strains. The two yeast strains used were a non-GMO and GMO strain engineered for xylose fermentation. The final ethanol concentrations obtained were 35.7 g/L from deacetylated corn stover and 32.9 g/L from sugarcane bagasse. Blending the two yeast reduced residual xylose content from 1.24 g/L to 0.48 g/L and increased ethanol production by 6.5% compared to solely using the C5/C6 yeast. The optimized yeast blend also lowered the amount of C5/C6 yeast required for inoculation by 80%.
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Affiliation(s)
- Zhaoqin Wang
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Bruce S Dien
- National Center for Agricultural Utilization Research, USDA, Peoria, IL, USA
| | - Kent D Rausch
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - M E Tumbleson
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Vijay Singh
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
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8
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Li M, Si B, Zhang Y, Watson J, Aierzhati A. Reduce recalcitrance of cornstalk using post-hydrothermal liquefaction wastewater pretreatment. BIORESOURCE TECHNOLOGY 2019; 279:57-66. [PMID: 30711753 DOI: 10.1016/j.biortech.2019.01.095] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 01/19/2019] [Accepted: 01/22/2019] [Indexed: 06/09/2023]
Abstract
Hydrothermal pretreatment (HTP) using an acidic catalyst is known to be effective for reducing lignocellulosic biomass recalcitrance. Post-hydrothermal liquefaction wastewater (PHW) from hydrothermal liquefaction of swine manure contains a large fraction of organic acids and thus was introduced to improve the HTP of cornstalk in this study. The response surface methodology was performed to optimize operating parameters of HTP for preserving structural polysaccharides while removing the barrier substances. A remarkable co-extraction of cell wall polymers was observed during PHW-catalyzed HTP at 172 °C for 88 min. The analysis of particle size, crystalline cellulose, the degree of polymerization (DP), mole number (MN) and SEM suggested that the co-extraction effect could distinctively alter lignocellulosic structures associated with recalcitrance and thus accelerate biomass saccharification. Additionally, the biodegradability of PHW was improved after HTP as a result of balanced nutrients and increased acids and sugars suitable for biogas production via anaerobic fermentation.
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Affiliation(s)
- Meng Li
- College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; National Energy R&D Center for Non-Food Biomass, China Agricultural University, Beijing 100193, China; Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Buchun Si
- College of Water Resource and Civil Engineering, China Agricultural University, Beijing 100193, China; Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Yuanhui Zhang
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.
| | - Jamison Watson
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Aersi Aierzhati
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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9
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Liu CG, Xiao Y, Xia XX, Zhao XQ, Peng L, Srinophakun P, Bai FW. Cellulosic ethanol production: Progress, challenges and strategies for solutions. Biotechnol Adv 2019; 37:491-504. [DOI: 10.1016/j.biotechadv.2019.03.002] [Citation(s) in RCA: 178] [Impact Index Per Article: 35.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2019] [Revised: 02/18/2019] [Accepted: 03/03/2019] [Indexed: 11/16/2022]
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10
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Zhao Z, Chen X, Ali MF, Abdeltawab AA, Yakout SM, Yu G. Pretreatment of wheat straw using basic ethanolamine-based deep eutectic solvents for improving enzymatic hydrolysis. BIORESOURCE TECHNOLOGY 2018; 263:325-333. [PMID: 29758482 DOI: 10.1016/j.biortech.2018.05.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/02/2018] [Accepted: 05/03/2018] [Indexed: 06/08/2023]
Abstract
A series of ethanolamine based deep eutectic solvents (DESs), which have strong basicity, were firstly applied in wheat straw pretreatment. Typically, choline chloride: monoethanolamine (C:M) as the best solvent among these DESs can remove 71.4% lignin and reserve 93.7% cellulose (70 °C, L/S mass ratio of 20:1, 9 h), and improve the enzymatic hydrolysis of residue, i.e., 89.8% cellulose and 62.0% xylan conversion. The pretreatment capacity of C:M is comparable to other solvents while C:M has several advantages, e.g., lower cost with cheap materials and simpler preparation process, mild conditions and lower polysaccharide loss. The XRD, SEM and FT-IR results verified that the polysaccharide conversion and sugars yield were enhanced by the removal of lignin in the pretreatment process. The basic ethanolamine based DESs are promising solvents for industrial application of wheat straw pretreatment.
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Affiliation(s)
- Zheng Zhao
- Beijing Key Laboratory of Membrane Science and Technology & College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Xiaochun Chen
- Beijing Key Laboratory of Membrane Science and Technology & College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Muhammad Furqan Ali
- Beijing Key Laboratory of Membrane Science and Technology & College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
| | - Ahmed A Abdeltawab
- Department of Chemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Sobhy M Yakout
- Department of Biochemistry, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Guangren Yu
- Beijing Key Laboratory of Membrane Science and Technology & College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China.
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11
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Yang M, Rehman MSU, Yan T, Khan AU, Oleskowicz-Popiel P, Xu X, Cui P, Xu J. Treatment of different parts of corn stover for high yield and lower polydispersity lignin extraction with high-boiling alkaline solvent. BIORESOURCE TECHNOLOGY 2018; 249:737-743. [PMID: 29100188 DOI: 10.1016/j.biortech.2017.10.055] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 10/12/2017] [Accepted: 10/13/2017] [Indexed: 06/07/2023]
Abstract
The influence of different parts of corn stover on lignin extraction was investigated. Five kinds of lignin were isolated by the high boiling point solvent extraction from the whole corn stover and four different parts including leaf, husk, bark and pith. The optimal condition was obtained: 6.25 g/L NaOH, 140 °C, 1 h and 60% (v/v) 1,4-butanediol. The extracted lignins were then characterized. FT-IR analysis revealed that all of the lignins were typically herbaceous. The lignin extracted from husk contained more S unit. Gel permeation chromatography analysis showed that it was necessary to separate corn stover into different parts to obtain low polydispersity lignin. The SEM and FT-IR analysis proved that the lignin dissolution was related to the tightness structure presenting a positive correlation with hydrogen bond index.
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Affiliation(s)
- Mengyao Yang
- University of Chinese Academy of Sciences, Beijing 100049, China; Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Muhammad Saif Ur Rehman
- Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Department of Chemical Engineering, Comsats Institute of Information Technology, Lahore, Pakistan
| | - Tingxuan Yan
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui 243032, China; Biochemical Engineering Research Center, Anhui University of Technology, Ma'anshan, Anhui 243032, China
| | - Asad Ullah Khan
- Department of Chemical Engineering, Comsats Institute of Information Technology, Lahore, Pakistan
| | | | - Xia Xu
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui 243032, China; Biochemical Engineering Research Center, Anhui University of Technology, Ma'anshan, Anhui 243032, China
| | - Ping Cui
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui 243032, China
| | - Jian Xu
- School of Chemistry and Chemical Engineering, Anhui University of Technology, Ma'anshan, Anhui 243032, China; Biochemical Engineering Research Center, Anhui University of Technology, Ma'anshan, Anhui 243032, China.
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12
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Fang C, Thomsen MH, Frankær CG, Bastidas-Oyanedel JR, Brudecki GP, Schmidt JE. Factors affecting seawater-based pretreatment of lignocellulosic date palm residues. BIORESOURCE TECHNOLOGY 2017; 245:540-548. [PMID: 28898854 DOI: 10.1016/j.biortech.2017.08.184] [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: 06/18/2017] [Revised: 08/24/2017] [Accepted: 08/29/2017] [Indexed: 06/07/2023]
Abstract
Seawater-based pretreatment of lignocellulosic biomass is an innovative process at research stage. With respect to process optimization, factors affecting seawater-based pretreatment of lignocellulosic date palm residues were studied for the first time in this paper. Pretreatment temperature (180°C-210°C), salinity of seawater (0ppt-50ppt), and catalysts (H2SO4, Na2CO3, and NaOH) were investigated. The results showed that pretreatment temperature exerted the largest influence on seawater-based pretreatment in terms of the enzymatic digestibility and fermentability of pretreated solids, and the inhibition of pretreatment liquids to Saccharomyces cerevisiae. Salinity showed the least impact to seawater-based pretreatment, which widens the application spectrum of saline water sources such as brines discharged in desalination plant. Sulfuric acid was the most effective catalyst for seawater-based pretreatment compared with Na2CO3 and NaOH.
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Affiliation(s)
- Chuanji Fang
- Department of Chemical and Environmental Engineering, Khalifa University of Science and Technology, Masdar Institute, Masdar City, P.O. Box 54224, Abu Dhabi, United Arab Emirates
| | - Mette Hedegaard Thomsen
- Department of Energy Technology, Aalborg University, Niels Bohrsvej 8, DK-6700 Esbjerg, Denmark
| | | | - Juan-Rodrigo Bastidas-Oyanedel
- Department of Chemical and Environmental Engineering, Khalifa University of Science and Technology, Masdar Institute, Masdar City, P.O. Box 54224, Abu Dhabi, United Arab Emirates.
| | - Grzegorz P Brudecki
- Department of Chemical and Environmental Engineering, Khalifa University of Science and Technology, Masdar Institute, Masdar City, P.O. Box 54224, Abu Dhabi, United Arab Emirates
| | - Jens Ejbye Schmidt
- Department of Chemical and Environmental Engineering, Khalifa University of Science and Technology, Masdar Institute, Masdar City, P.O. Box 54224, Abu Dhabi, United Arab Emirates.
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13
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Narron RH, Han Q, Park S, Chang HM, Jameel H. Lignocentric analysis of a carbohydrate-producing lignocellulosic biorefinery process. BIORESOURCE TECHNOLOGY 2017; 241:857-867. [PMID: 28629103 DOI: 10.1016/j.biortech.2017.05.207] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 05/30/2017] [Accepted: 05/31/2017] [Indexed: 05/27/2023]
Abstract
A biologically-based lignocellulosic biorefinery process for obtaining carbohydrates from raw biomass was investigated across six diverse biomasses (three hardwoods & three nonwoods) for the purpose of decoding lignin's influence on sugar production. Acknowledging that lignin could positively alter the economics of an entire process if valorized appropriately, we sought to correlate the chemical properties of lignin within the process to the traditional metrics associated with carbohydrate production-cellulolytic digestibility and total sugar recovery. Based on raw carbohydrate, enzymatic recovery ranged from 40 to 64% w/w and total recovery ranged from 70 to 87% w/w. Using nitrobenzene oxidation to quantify non-condensed lignin structures, it was found that raw hardwoods bearing increasing non-condensed S/V ratios (2.5-5.1) render increasing total carbohydrate recovery from hardwood biomasses. This finding indicates that the chemical structure of hardwood lignin influences the investigated biorefinery process' ability to generate carbohydrates from a given raw hardwood feedstock.
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Affiliation(s)
- Robert H Narron
- Department of Forest Biomaterials, North Carolina State University, 2820 Faucette Dr, Raleigh 27607, NC, United States
| | - Qiang Han
- Department of Forest Biomaterials, North Carolina State University, 2820 Faucette Dr, Raleigh 27607, NC, United States
| | - Sunkyu Park
- Department of Forest Biomaterials, North Carolina State University, 2820 Faucette Dr, Raleigh 27607, NC, United States
| | - Hou-Min Chang
- Department of Forest Biomaterials, North Carolina State University, 2820 Faucette Dr, Raleigh 27607, NC, United States
| | - Hasan Jameel
- Department of Forest Biomaterials, North Carolina State University, 2820 Faucette Dr, Raleigh 27607, NC, United States.
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