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Yang Y, Ma X, Wang M, Ji X, Li L, Liu Z, Wang J, Ren Y, Jia L. Mild γ-Butyrolactone/Water Pretreatment for Highly Efficient Sugar Production from Corn Stover. Appl Biochem Biotechnol 2024:10.1007/s12010-024-04922-6. [PMID: 38589715 DOI: 10.1007/s12010-024-04922-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/18/2024] [Indexed: 04/10/2024]
Abstract
In this study, γ-butyrolactone/water (GBL/H2O) was explored as a mild, efficient, and cost-effective binary solvent pretreatment to enhance hydrolyzability of corn stover (CS). Key pretreatment parameters-reaction time, temperature, and H2SO4 concentration-were systematically investigated for their effects on the physicochemical properties of CS. Specifically, increased temperature and acid concentration significantly decreased cellulose crystallinity (from 1.39 for untreated CS to 1.04 for CS pretreated by GBL/H2O with 100 mM H2SO4 at 120 °C for 1 h) and promoted lignin removal (47.3% for CS pretreated by GBL/H2O with 150 mM H2SO4 at 120 °C for 1 h). Acknowledging the cellulase's limited hydrolysis efficiency, a dual-enzyme scheme using a low cellulase dosage (10 FPU/g) supplemented with β-glucosidase or xylanase was tested, enhancing hydrolysis of CS pretreated under low temperature-long duration and high temperature-short duration conditions, respectively. Optimum sugar release was obtained from CS pretreated with GBL/H2O and 150 mM H2SO4 at 120 °C for 1 h, achieving 98% glucan and 82.3% xylan conversion, compared with 53.9% and 17% of glucan and xylan conversion from untreated CS. GBL/H2O pretreatment outperformed other binary systems in literature, achieving the highest sugar conversions with lower enzyme loading. These results highlight the potential of GBL/H2O pretreatment for efficient biomass conversion, contributing to the goals of the green economy.
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Affiliation(s)
- Yu Yang
- College of Forestry, Northwest A&F University, No.3 Taicheng Road, Yangling, Shaanxi, 712100, China
| | - Xueliang Ma
- College of Forestry, Northwest A&F University, No.3 Taicheng Road, Yangling, Shaanxi, 712100, China
| | - Manzhu Wang
- College of Forestry, Northwest A&F University, No.3 Taicheng Road, Yangling, Shaanxi, 712100, China
| | - Xinyi Ji
- College of Forestry, Northwest A&F University, No.3 Taicheng Road, Yangling, Shaanxi, 712100, China
| | - Long Li
- Co-Innovation Center for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, 210037, China
- Bamboo Research Institute, Nanjing Forestry University, Nanjing, 210037, China
| | - Ziyu Liu
- College of Forestry, Northwest A&F University, No.3 Taicheng Road, Yangling, Shaanxi, 712100, China
| | - Jiangyao Wang
- College of Forestry, Northwest A&F University, No.3 Taicheng Road, Yangling, Shaanxi, 712100, China
| | - Yujin Ren
- College of Forestry, Northwest A&F University, No.3 Taicheng Road, Yangling, Shaanxi, 712100, China
| | - Lili Jia
- College of Forestry, Northwest A&F University, No.3 Taicheng Road, Yangling, Shaanxi, 712100, China.
- Shaanxi Key Laboratory of Economic Plant Resources Development and Utilization, Yangling, Shaanxi, 712100, China.
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Xu X, Liang B, Zhu Y, Chen J, Gan T, Hu H, Zhang Y, Huang Z, Qin Y. Direct and efficient conversion of cellulose to levulinic acid catalyzed by carbon foam-supported heteropolyacid with Brønsted-Lewis dual-acidic sites. BIORESOURCE TECHNOLOGY 2023; 387:129600. [PMID: 37532058 DOI: 10.1016/j.biortech.2023.129600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 07/26/2023] [Accepted: 07/30/2023] [Indexed: 08/04/2023]
Abstract
This study aimed to produce bio-based levulinic acid (LA) via direct and efficient conversion of cellulose catalyzed by a sustainable solid acid. A carbon foam (CF)-supported aluminotungstic acid (HAlW/CF) catalyst with Brønsted-Lewis dual-acidic sites was creatively engineered by a hydrothermal impregnation method. The activity of the HAlW/CF catalyst was determined via the hydrolysis and conversion of cellulose to prepare LA in aqueous system. The cooperative effect of Brønsted and Lewis acids in HAlW/CF resulted in high cellulose conversion (89.4%) and LA yield (60.9%) at 180 °C for 4 h, which were greater than the combined catalytic efficiencies of single HAlW and CF under the same conditions. The HAlW/CF catalyst in block form exhibited superior catalytic activity, facile separation from reaction system, and favorable reusability. This work offers novel perspectives for the development of recyclable dual-acidic catalysts to achieve one-pot catalytic conversion of biomass to value-added chemicals.
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Affiliation(s)
- Xiaofen Xu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Beiling Liang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Ying Zhu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Jiashuo Chen
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
| | - Tao Gan
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Huayu Hu
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Yanjuan Zhang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China.
| | - Zuqiang Huang
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China; Key Laboratory of New Low-carbon Green Chemical Technology, Education Department of Guangxi Zhuang Autonomous Region, Nanning 530004, China
| | - Yuben Qin
- School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
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Yin FW, Sun XL, Zheng WL, Yin LF, Luo X, Zhang YY, Wang YF, Fu YQ. Development of a Strategy for L-Lactic Acid Production by Rhizopus oryzae Using Zizania latifolia Waste and Cane Molasses as Carbon Sources. Molecules 2023; 28:6234. [PMID: 37687063 PMCID: PMC10488812 DOI: 10.3390/molecules28176234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 08/21/2023] [Accepted: 08/24/2023] [Indexed: 09/10/2023] Open
Abstract
As a biodegradable and renewable material, polylactic acid is considered a major environmentally friendly alternative to petrochemical plastics. Microbial fermentation is the traditional method for lactic acid production, but it is still too expensive to compete with the petrochemical industry. Agro-industrial wastes are generated from the food and agricultural industries and agricultural practices. The utilization of agro-industrial wastes is an important way to reduce costs, save energy and achieve sustainable development. The present study aimed to develop a method for the valorization of Zizania latifolia waste and cane molasses as carbon sources for L-lactic acid fermentation using Rhizopus oryzae LA-UN-1. The results showed that xylose derived from the acid hydrolysis of Z. latifolia waste was beneficial for cell growth, while glucose from the acid hydrolysis of Z. latifolia waste and mixed sugars (glucose and fructose) from the acid hydrolysis of cane molasses were suitable for the accumulation of lactic acid. Thus, a three-stage carbon source utilization strategy was developed, which markedly improved lactic acid production and productivity, respectively reaching 129.47 g/L and 1.51 g/L·h after 86 h of fermentation. This work demonstrates that inexpensive Z. latifolia waste and cane molasses can be suitable carbon sources for lactic acid production, offering an efficient utilization strategy for agro-industrial wastes.
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Affiliation(s)
- Feng-Wei Yin
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Taizhou 318000, China
| | - Xiao-Long Sun
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Taizhou 318000, China
| | - Wei-Long Zheng
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Taizhou 318000, China
| | - Long-Fei Yin
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Taizhou 318000, China
| | - Xi Luo
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Taizhou 318000, China
| | - Ying-Ying Zhang
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Taizhou 318000, China
| | - Yan-Fei Wang
- Taizhou Institute of Product Quality and Safety Inspection, Taizhou 318000, China
| | - Yong-Qian Fu
- Taizhou Key Laboratory of Biomass Functional Materials Development and Application, Taizhou University, Taizhou 318000, China
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Tang ZY, Li L, Tang W, Shen JW, Yang QZ, Ma C, He YC. Significantly enhanced enzymatic hydrolysis of waste rice hull through a novel surfactant-based deep eutectic solvent pretreatment. BIORESOURCE TECHNOLOGY 2023; 381:129106. [PMID: 37127172 DOI: 10.1016/j.biortech.2023.129106] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/20/2023] [Accepted: 04/25/2023] [Indexed: 05/03/2023]
Abstract
The potential of green solvents, specifically deep eutectic solvents (DESs), has piqued the interest of researchers in the field of lignocellulose pretreatment. To enhance the enzymatic digestion efficiency of waste rice hull (RCH), an effective pretreatment approach was developed using the DES [AA][CATB], which was made with acetic acid (AA) and cetyltrimethylammonium bromide (CTAB). The results showed that [AA][CATB] improved enzymatic saccharification by 3.7 times compared to raw RCH and efficiently eliminated lignin (38.7%) and removed xylan (42.9%). The improvement in enzymatic hydrolysis efficiency was then interpreted by a series of characterizations that showed a great morphological changed RCH with an obvious accessibility increase and a lignin surface area and hydrophobicity reduction. This work demonstrates that functional, and easily recoverable DESs have potential for improving the efficiency of lignocellulose pretreatment in biorefineries, providing a promising approach for developing green solvents and achieving more sustainable and efficient biorefinery processes.
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Affiliation(s)
- Zheng-Yu Tang
- School of Pharmacy, Changzhou University, Changzhou 213164, P.R. China
| | - Lei Li
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan 430062, P.R. China
| | - Wei Tang
- School of Pharmacy, Changzhou University, Changzhou 213164, P.R. China
| | - Jia-Wei Shen
- School of Pharmacy, Changzhou University, Changzhou 213164, P.R. China
| | - Qi-Zhen Yang
- School of Pharmacy, Changzhou University, Changzhou 213164, P.R. China
| | - Cuiluan Ma
- State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan 430062, P.R. China
| | - Yu-Cai He
- School of Pharmacy, Changzhou University, Changzhou 213164, P.R. China; State Key Laboratory of Biocatalysis and Enzyme Engineering, Hubei University, Wuhan 430062, P.R. China.
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Sun C, Song G, Pan Z, Tu M, Kharaziha M, Zhang X, Show PL, Sun F. Advances in organosolv modified components occurring during the organosolv pretreatment of lignocellulosic biomass. BIORESOURCE TECHNOLOGY 2023; 368:128356. [PMID: 36414144 DOI: 10.1016/j.biortech.2022.128356] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 11/14/2022] [Accepted: 11/16/2022] [Indexed: 06/16/2023]
Abstract
The valorization of organosolv pretreatment (OP) is a required approach to the industrialization of the current enzyme-mediated lignocellulosic biorefinery. Recent literature has demonstrated that the solvolysis happening in the OP can modify the soluble components into value-added active compounds, namely organosolv modified lignin (OML) and organosolv modified sugars (OMSs), in addition to protecting them against excessive degradation. Among them, the OML is coincidental with the "lignin-first" strategy that should render a highly reactive lignin enriched with β-O-4 linkages and less condensed structure by organosolv grafting, which is desirable for the transformation into phenolic compounds. The OMSs are valuable glycosidic compounds mainly synthesized by trans-glycosylation, which can find potential applications in cosmetics, foods, and healthcare. Therefore, a state-of-the-art OP holds a big promise of lowering the process cost by the valorization of these active compounds. Recent advances in organosolv modified components are reviewed, and perspectives are made for addressing future challenges.
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Affiliation(s)
- Chihe Sun
- Key Laboratory of Industrial Biotechnology of MOE, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Guojie Song
- Key Laboratory of Industrial Biotechnology of MOE, School of Biotechnology, Jiangnan University, Wuxi 214122, China
| | - Zhenying Pan
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
| | - Maobing Tu
- Department of Biomedical, Chemical and Environmental Engineering, University of Cincinnati, Cincinnati, OH 45221, USA
| | - Mahshid Kharaziha
- Department of Materials Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Xueming Zhang
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, China
| | - Pau-Loke Show
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia, 43500 Semenyih, Malaysia
| | - Fubao Sun
- Key Laboratory of Industrial Biotechnology of MOE, School of Biotechnology, Jiangnan University, Wuxi 214122, China.
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