1
|
Tang S, Ma Y, Dong X, Zhou H, He Y, Ren D, Wang Q, Yang H, Liu S, Wu L. Enzyme-assisted extraction of fucoidan from Kjellmaniella crassifolia based on kinetic study of enzymatic hydrolysis of algal cellulose. ALGAL RES 2022. [DOI: 10.1016/j.algal.2022.102795] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
2
|
Recent Advances in the Biosynthesis of Polyhydroxyalkanoates from Lignocellulosic Feedstocks. Life (Basel) 2021; 11:life11080807. [PMID: 34440551 PMCID: PMC8398495 DOI: 10.3390/life11080807] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 07/26/2021] [Accepted: 08/03/2021] [Indexed: 12/20/2022] Open
Abstract
Polyhydroxyalkanoates (PHA) are biodegradable polymers that are considered able to replace synthetic plastic because their biochemical characteristics are in some cases the same as other biodegradable polymers. However, due to the disadvantages of costly and non-renewable carbon sources, the production of PHA has been lower in the industrial sector against conventional plastics. At the same time, first-generation sugar-based cultivated feedstocks as substrates for PHA production threatens food security and considerably require other resources such as land and energy. Therefore, attempts have been made in pursuit of suitable sustainable and affordable sources of carbon to reduce production costs. Thus, in this review, we highlight utilising waste lignocellulosic feedstocks (LF) as a renewable and inexpensive carbon source to produce PHA. These waste feedstocks, second-generation plant lignocellulosic biomass, such as maize stoves, dedicated energy crops, rice straws, wood chips, are commonly available renewable biomass sources with a steady supply of about 150 billion tonnes per year of global yield. The generation of PHA from lignocellulose is still in its infancy, hence more screening of lignocellulosic materials and improvements in downstream processing and substrate pre-treatment are needed in the future to further advance the biopolymer sector.
Collapse
|
3
|
Zhang X, Yuan Q, Cheng G. Deconstruction of corncob by steam explosion pretreatment: Correlations between sugar conversion and recalcitrant structures. Carbohydr Polym 2017; 156:351-356. [DOI: 10.1016/j.carbpol.2016.09.044] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 09/11/2016] [Accepted: 09/14/2016] [Indexed: 11/27/2022]
|
4
|
Wang FL, Li S, Sun YX, Han HY, Zhang BX, Hu BZ, Gao YF, Hu XM. Ionic liquids as efficient pretreatment solvents for lignocellulosic biomass. RSC Adv 2017. [DOI: 10.1039/c7ra08110c] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ionic liquid (IL)-assisted pretreatment of lignocellulosic biomass has been extensively studied.
Collapse
Affiliation(s)
- Fu-Ling Wang
- College of Life Science
- Northeast Agricultural University
- Harbin
- China
| | - Shuang Li
- College of Life Science
- Northeast Agricultural University
- Harbin
- China
| | - Yi-Xin Sun
- College of Life Science
- Northeast Agricultural University
- Harbin
- China
| | - Hui-Ying Han
- College of Life Science
- Northeast Agricultural University
- Harbin
- China
| | - Bi-Xian Zhang
- Heilongjiang Academy of Agricultural Sciences
- Harbin
- China
| | | | - Yun-Fei Gao
- Heilongjiang Academy of Agricultural Sciences
- Harbin
- China
| | - Xiao-Mei Hu
- College of Life Science
- Northeast Agricultural University
- Harbin
- China
| |
Collapse
|
5
|
Wang Y, Fan C, Hu H, Li Y, Sun D, Wang Y, Peng L. Genetic modification of plant cell walls to enhance biomass yield and biofuel production in bioenergy crops. Biotechnol Adv 2016; 34:997-1017. [PMID: 27269671 DOI: 10.1016/j.biotechadv.2016.06.001] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 05/31/2016] [Accepted: 06/01/2016] [Indexed: 02/06/2023]
Abstract
Plant cell walls represent an enormous biomass resource for the generation of biofuels and chemicals. As lignocellulose property principally determines biomass recalcitrance, the genetic modification of plant cell walls has been posed as a powerful solution. Here, we review recent progress in understanding the effects of distinct cell wall polymers (cellulose, hemicelluloses, lignin, pectin, wall proteins) on the enzymatic digestibility of biomass under various physical and chemical pretreatments in herbaceous grasses, major agronomic crops and fast-growing trees. We also compare the main factors of wall polymer features, including cellulose crystallinity (CrI), hemicellulosic Xyl/Ara ratio, monolignol proportion and uronic acid level. Furthermore, the review presents the main gene candidates, such as CesA, GH9, GH10, GT61, GT43 etc., for potential genetic cell wall modification towards enhancing both biomass yield and enzymatic saccharification in genetic mutants and transgenic plants. Regarding cell wall modification, it proposes a novel groove-like cell wall model that highlights to increase amorphous regions (density and depth) of the native cellulose microfibrils, providing a general strategy for bioenergy crop breeding and biofuel processing technology.
Collapse
Affiliation(s)
- Yanting Wang
- Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Chunfen Fan
- Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Huizhen Hu
- Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Ying Li
- Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Dan Sun
- Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; College of Chemistry and Chemical Engineering, Hubei University of Technology, Wuhan, Hubei 430068, China
| | - Youmei Wang
- Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Liangcai Peng
- Biomass and Bioenergy Research Centre, Huazhong Agricultural University, Wuhan 430070, China; National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan 430070, China; College of Plant Science and Technology, Huazhong Agricultural University, Wuhan 430070, China.
| |
Collapse
|
6
|
Viell J, Inouye H, Szekely NK, Frielinghaus H, Marks C, Wang Y, Anders N, Spiess AC, Makowski L. Multi-scale processes of beech wood disintegration and pretreatment with 1-ethyl-3-methylimidazolium acetate/water mixtures. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:7. [PMID: 26752999 PMCID: PMC4706671 DOI: 10.1186/s13068-015-0422-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Accepted: 12/15/2015] [Indexed: 05/31/2023]
Abstract
BACKGROUND The valorization of biomass for chemicals and fuels requires efficient pretreatment. One effective strategy involves the pretreatment with ionic liquids which enables enzymatic saccharification of wood within a few hours under mild conditions. This pretreatment strategy is, however, limited by water and the ionic liquids are rather expensive. The scarce understanding of the involved effects, however, challenges the design of alternative pretreatment concepts. This work investigates the multi length-scale effects of pretreatment of wood in 1-ethyl-3-methylimidazolium acetate (EMIMAc) in mixtures with water using spectroscopy, X-ray and neutron scattering. RESULTS The structure of beech wood is disintegrated in EMIMAc/water mixtures with a water content up to 8.6 wt%. Above 10.7 wt%, the pretreated wood is not disintegrated, but still much better digested enzymatically compared to native wood. In both regimes, component analysis of the solid after pretreatment shows an extraction of few percent of lignin and hemicellulose. In concentrated EMIMAc, xylan is extracted more efficiently and lignin is defunctionalized. Corresponding to the disintegration at macroscopic scale, SANS and XRD show isotropy and a loss of crystallinity in the pretreated wood, but without distinct reflections of type II cellulose. Hence, the microfibril assembly is decrystallized into rather amorphous cellulose within the cell wall. CONCLUSIONS The molecular and structural changes elucidate the processes of wood pretreatment in EMIMAc/water mixtures. In the aqueous regime with >10.7 wt% water in EMIMAc, xyloglucan and lignin moieties are extracted, which leads to coalescence of fibrillary cellulose structures. Dilute EMIMAc/water mixtures thus resemble established aqueous pretreatment concepts. In concentrated EMIMAc, the swelling due to decrystallinization of cellulose, dissolution of cross-linking xylan, and defunctionalization of lignin releases the mechanical stress to result in macroscopic disintegration of cells. The remaining cell wall constituents of lignin and hemicellulose, however, limit a recrystallization of the solvated cellulose. These pretreatment mechanisms are beyond common pretreatment concepts and pave the way for a formulation of mechanistic requirements of pretreatment with simpler pretreatment liquors.
Collapse
Affiliation(s)
- Jörn Viell
- />Aachener Verfahrenstechnik-Process Systems Engineering, RWTH Aachen University, Turmstr. 46, 52064 Aachen, Germany
- />JARA-ENERGY, Jülich, Germany
| | - Hideyo Inouye
- />Department of Electrical and Computer Engineering, College of Engineering, Northeastern University, 360 Huntington Avenue, Boston, MA 02115 USA
| | - Noemi K. Szekely
- />Jülich Centre for Neutron Science, Forschungszentrum Jülich GmbH, Outstation at MLZ, Lichtenbergstraße 1, 85747 Garching, Germany
| | - Henrich Frielinghaus
- />Jülich Centre for Neutron Science, Forschungszentrum Jülich GmbH, Outstation at MLZ, Lichtenbergstraße 1, 85747 Garching, Germany
| | - Caroline Marks
- />Aachener Verfahrenstechnik-Process Systems Engineering, RWTH Aachen University, Turmstr. 46, 52064 Aachen, Germany
| | - Yumei Wang
- />Aachener Verfahrenstechnik-Enzyme Process Technology, RWTH Aachen University, Worringer Weg 1, 52074 Aachen, Germany
| | - Nico Anders
- />Aachener Verfahrenstechnik-Enzyme Process Technology, RWTH Aachen University, Worringer Weg 1, 52074 Aachen, Germany
| | - Antje C. Spiess
- />Aachener Verfahrenstechnik-Enzyme Process Technology, RWTH Aachen University, Worringer Weg 1, 52074 Aachen, Germany
- />DWI-Leibniz Institute für Interactive Materials, Forckenbeckstr. 40, 52072 Aachen, Germany
- />Institute of Biochemical Engineering, Technische Universität Braunschweig, Gaußstr. 17, 38102 Braunschweig, Germany
| | - Lee Makowski
- />Bioengineering Department and Chemistry and Chemical Biology Department, Northeastern University, 360 Huntington Ave., Boston, MA 02115 USA
| |
Collapse
|
7
|
Zhang X, Zhao W, Li Y, Li C, Yuan Q, Cheng G. Synergistic effect of pretreatment with dimethyl sulfoxide and an ionic liquid on enzymatic digestibility of white poplar and pine. RSC Adv 2016. [DOI: 10.1039/c6ra14206k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A systematic study on the interactions between dimethyl sulfoxide (DMSO) and an ionic liquid (IL), 1-ethyl-3-methylimidazolium acetate (EmimAc), during lignocellulosic biomass pretreatment was performed.
Collapse
Affiliation(s)
- Xin Zhang
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- China
| | - Wenwen Zhao
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- China
| | - Yujie Li
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- China
| | - Chi Li
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- China
| | - Qipeng Yuan
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- China
| | - Gang Cheng
- College of Life Science and Technology
- Beijing University of Chemical Technology
- Beijing
- China
| |
Collapse
|
8
|
Gu Y, Zhang Y, Zhou X. Effect of Ca(OH)2 pretreatment on extruded rice straw anaerobic digestion. BIORESOURCE TECHNOLOGY 2015; 196:116-122. [PMID: 26231131 DOI: 10.1016/j.biortech.2015.07.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2015] [Revised: 06/30/2015] [Accepted: 07/01/2015] [Indexed: 06/04/2023]
Abstract
It has been proven that extrusion can change the structure of rice straw and increase biogas production, but the effect of a single pretreatment is limited. Ca(OH)2 pretreatment was used to enhance the enzyme hydrolysis and biogas production of extruded rice straw. After Ca(OH)2 pretreatment, the glucose and xylose conversion rates in enzymatic hydrolysis increased from 36.0% and 22.4% to 66.8% and 50.2%, respectively. The highest biogas production observed in 8% and 10% Ca(OH)2 pretreated rice straw reached 564.7mL/g VS and 574.5mL/g VS, respectively, which are 34.3% and 36.7% higher than the non-Ca(OH)2-loaded sample. The Ca(OH)2 pretreatment can effectively remove the lignin and increase the fermentable sugar content. The structural changes in the extruded rice straw have also been analyzed by XRD, FTIR, and SEM. Considering all of the results, an 8% Ca(OH)2 loading rate is the best option for the pretreatment of extruded rice straw.
Collapse
Affiliation(s)
- Yu Gu
- Key Laboratory of Yangtze Water Environment of Ministry of Education, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Yalei Zhang
- Key Laboratory of Yangtze Water Environment of Ministry of Education, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China
| | - Xuefei Zhou
- Key Laboratory of Yangtze Water Environment of Ministry of Education, State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
| |
Collapse
|