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Chen S, Davaritouchaee M. Nature-inspired pretreatment of lignocellulose - Perspective and development. BIORESOURCE TECHNOLOGY 2023; 369:128456. [PMID: 36503090 DOI: 10.1016/j.biortech.2022.128456] [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: 09/30/2022] [Revised: 12/02/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
As sustainability gains increasing importance in addition to cost-effectiveness as a criterion for evaluating engineering systems and practices, biological processes for lignocellulose pretreatment have attracted growing attention. Biological systems such as white and brown rot fungi and wood-consuming insects offer fascinating examples of processes and systems built by nature to effectively deconstruct plant cell walls under environmentally benign and energy-conservative environments. Research in the last decade has resulted in new knowledge that advanced the understanding of these systems, provided additional insights into these systems' functional mechanisms, and demonstrated various applications of these processes. The new knowledge and insights enable the adoption of a nature-inspired strategy aiming at developing technologies that are informed by the biological systems but superior to them by overcoming the inherent weakness of the natural systems. This review discusses the nature-inspired perspective and summarizes related advancements, including the evolution from biological systems to nature-inspired processes, the features of biological pretreatment mechanisms, the development of nature-inspired pretreatment processes, and future perspective. This work aims to highlight a different strategy in the research and development of novel lignocellulose pretreatment processes and offer some food for thought.
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Affiliation(s)
- Shulin Chen
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164, USA.
| | - Maryam Davaritouchaee
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164, USA
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2
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Wittner N, Slezsák J, Broos W, Geerts J, Gergely S, Vlaeminck SE, Cornet I. Rapid lignin quantification for fungal wood pretreatment by ATR-FTIR spectroscopy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 285:121912. [PMID: 36174400 DOI: 10.1016/j.saa.2022.121912] [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: 05/18/2022] [Revised: 09/16/2022] [Accepted: 09/18/2022] [Indexed: 06/16/2023]
Abstract
Lignin determination in lignocellulose with the conventional two-step acid hydrolysis method is highly laborious and time-consuming. However, its quantification is crucial to monitor fungal pretreatment of wood, as the increase of acid-insoluble lignin (AIL) degradation linearly correlates with the achievable enzymatic saccharification yield. Therefore, in this study, a new attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy method was developed to track fungal delignification in an easy and rapid manner. Partial least square regression (PLSR) with cross-validation (CV) was applied to correlate the ATR-FTIR spectra with the AIL content (19.9 %-27.1 %). After variable selection and normalization, a PLSR model with a high coefficient of determination (RCV2 = 0.87) and a low root mean square (RMSECV = 0.60 %) were obtained despite the heterogeneous nature of the fungal solid-state fermentation. These results show that ATR-FTIR can reliably predict the AIL content in fungus-treated wood while being a high-throughput method. This novel method can facilitate the transition to the wood-based economy.
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Affiliation(s)
- Nikolett Wittner
- Research Group of Biochemical Wastewater Valorization and Engineering, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - János Slezsák
- Department of Applied Biotechnology and Food Science, Budapest University of Technology and Economics, Szent Gellért tér 4, 1111 Budapest, Hungary
| | - Waut Broos
- Research Group of Biochemical Wastewater Valorization and Engineering, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Jordi Geerts
- Research Group of Biochemical Wastewater Valorization and Engineering, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Szilveszter Gergely
- Department of Applied Biotechnology and Food Science, Budapest University of Technology and Economics, Szent Gellért tér 4, 1111 Budapest, Hungary
| | - Siegfried E Vlaeminck
- Research Group of Sustainable Energy, Air and Water Technology, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium
| | - Iris Cornet
- Research Group of Biochemical Wastewater Valorization and Engineering, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerpen, Belgium.
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Do TTH, Ly TBT, Hoang NT, Tran VT. A new integrated circular economy index and a combined method for optimization of wood production chain considering carbon neutrality. CHEMOSPHERE 2023; 311:137029. [PMID: 36323387 DOI: 10.1016/j.chemosphere.2022.137029] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 08/02/2022] [Accepted: 10/24/2022] [Indexed: 06/16/2023]
Abstract
The wood industry is potentially advantageous to applying the concepts of circular economy for sustainable development and can contribute to the commitment of carbon neutrality. This study developed an integrated circular economy index based on five different quantitative indicators for assessment of the wood production chain: heat recovery rate, CO2 sequestration rate, fossil fuel substitution rate, renewable electricity usage rate, and revenue increase from the by-products. A combination of best-worst method (BWM) and linear goal programming (LGP) techniques was investigated to develop an optimal circular economy model of wood processing chain for reduction in CO2 emission. The integrated circular economy index and the combined method were tested in a case-study of a rubberwood processing chain in Vietnam. The proposed model suggests that the woodchips and biomass from the harvesting and processing of rubberwood could be collected and treated using microwave thermolysis techniques; the enzyme hydrolysis technique is appropriate for bioethanol and biomethane recovery from the sawdust; and the hot air technique is preferable in the drying process. The proposed model could result in a significant reduction of the total net carbon emission from +552,750 tons CO2eq to -1,145,940 tons CO2eq per year. This could support the achievement of Vietnam's zero CO2 emission goal and hopefully contribute to the country's commitment to carbon emission neutrality by the year 2050.
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Affiliation(s)
- Thi Thu Huyen Do
- Institute for Environment and Resources, Vietnam National University Ho Chi Minh City, Viet Nam.
| | - Thi Bich Tram Ly
- Institute for Environment and Resources, Vietnam National University Ho Chi Minh City, Viet Nam
| | - Nhat Truong Hoang
- International University, Vietnam National University Ho Chi Minh City, Viet Nam
| | - Van Thanh Tran
- Institute for Environment and Resources, Vietnam National University Ho Chi Minh City, Viet Nam
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Liu Y, Yan Z, He Q, Deng W, Zhou M, Chen Y. Bacterial delignification promotes the pretreatment of rice straw by ionic liquid at high biomass loading. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.08.026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Terasawat A, Phoolphundh S. Simultaneous Biological Pretreatment and Saccharification of Rice Straw by Ligninolytic Enzymes from Panus neostrigosus I9 and Commercial Cellulase. J Fungi (Basel) 2021; 7:853. [PMID: 34682275 PMCID: PMC8537424 DOI: 10.3390/jof7100853] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 10/05/2021] [Accepted: 10/05/2021] [Indexed: 11/17/2022] Open
Abstract
The utilization of rice straw for biofuel production is limited by its composition. The pretreatment process is required to improve the enzymatic accessibility of polysaccharides in the biomass prior to enzymatic saccharification. In this study, simultaneous biological pretreatment and saccharification (SPS) of rice straw starting from laccase production by Panus neostrigosus I9 was operated in a 2-L fermenter. It was found that fungal physiology was strongly influenced by the agitation, and that the highest laccase production was obtained at an agitation speed of 750 rpm (209.96 ± 0.34 U/L). The dilution rate of 0.05 h-1 was set in continuous fermentation which resulted in laccase activity of 678.49 ± 20.39 U/L, approximately three times higher than that in batch culture. Response surface methodology (RSM) was applied to achieve the condition for maximum percentage of delignification. The maximum percentage of delignification of 45.55% was accomplished after pretreatment of rice straw with laccase enzyme 39.40 U/g rice straw at 43.70 °C for 11.19 h. Reducing sugar of 3.85 ± 0.15 g/L was obtained from the digested rice straw in a SPS reactor, while non-pretreated rice straw gave only 1.13 ± 0.10 g/L within 12 h of incubation. The results indicated that simultaneous biological pretreatment and saccharification (SPS) of rice straw by laccase helped to improve the accessibility of cellulose by cellulolytic enzymes.
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Affiliation(s)
| | - Sivawan Phoolphundh
- Department of Microbiology, Faculty of Science, King Mongkut’s University of Technology Thonburi, 126 Pracha-Uthid Road, Bang Mod, Thungkru, Bangkok 10140, Thailand;
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Enhanced fungal delignification and enzymatic digestibility of poplar wood by combined CuSO4 and MnSO4 supplementation. Process Biochem 2021. [DOI: 10.1016/j.procbio.2021.06.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Ma J, Yue H, Li H, Zhang J, Zhang Y, Wang X, Gong S, Liu GQ. Selective delignification of poplar wood with a newly isolated white-rot basidiomycete Peniophora incarnata T-7 by submerged fermentation to enhance saccharification. BIOTECHNOLOGY FOR BIOFUELS 2021; 14:135. [PMID: 34118970 PMCID: PMC8199694 DOI: 10.1186/s13068-021-01986-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 06/05/2021] [Indexed: 05/08/2023]
Abstract
BACKGROUND Pretreatment is a critical step required for efficient conversion of woody biomass into biofuels and platform chemicals. Fungal pretreatment is regarded as one of the most promising technology for woody biomass conversion but remains challenging for industrial application. The exploration of potential fungus strain with high efficient delignification and less processing time for woody biomass pretreatment will be valuable for development of biorefinery industry. Here, a newly isolated white-rot basidiomycete Peniophora incarnate T-7 was employed for poplar wood pretreatment. RESULTS The chemical component analysis showed that cellulose, hemicellulose and lignin from poplar wood declined by 16%, 48% and 70%, respectively, after 7 days submerged fermentation by P. incarnate T-7. Enzymatic saccharification analysis revealed that the maximum yields of glucose and xylose from 7 days of P. incarnate T-7 treated poplar wood reached 33.4% and 27.6%, respectively, both of which were enhanced by sevenfold relative to the untreated group. Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), X-ray diffraction (XRD) and pyrolysis gas chromatography-mass spectrometry (Py-GC/MS) characterization confirmed that lignocellulosic structure of poplar wood was largely broken by P. incarnate T-7, including delignification and de-crystalline of cellulose. Meanwhile, lignin component of poplar wood was selectively degraded by P. incarnate T-7, and G-type unit of lignin was preferentially attacked by the strain. Furthermore, quantitative proteomic analysis revealed that a considerable amount of lignocellulolytic enzymes were detected in the secretory proteins of P. incarnate T-7, especially with high abundance of lignin-degrading enzymes and hemicellulases. Combination of quantitative proteomic with transcriptomic analysis results showed that most of those lignocellulolytic enzymes were highly upregulated on poplar wood substrate compared to glucose substrate. CONCLUSIONS This study showed that P. incarnate T-7 could selectively delignify poplar wood by submerged fermentation with short time of 7 days, which greatly improved its enzymatic saccharification efficiency. Our results suggested that P. incarnate T-7 might be a promising candidate for industrial woody biomass pretreatment.
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Affiliation(s)
- Jiangshan Ma
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
| | - Huimin Yue
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
| | - Hongqian Li
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
| | - Jing Zhang
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
| | - Yanghong Zhang
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
| | - Xiaoling Wang
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
| | - Si Gong
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
| | - Gao-Qiang Liu
- Hunan Provincial Key Laboratory of Forestry Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
- International Cooperation Base of Science and Technology Innovation on Forest Resource Biotechnology, Central South University of Forestry and Technology, Changsha, 410004 Hunan P.R. China
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Halophilic Fungal Communities: Current Research and Future Challenges. Fungal Biol 2021. [DOI: 10.1007/978-3-030-60659-6_9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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9
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Davaritouchaee M, Chen S, Mancini RJ. Delignification and Enzyme-Diffusion Kinetics of Radical Systems Treating Wheat Straw. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c04107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maryam Davaritouchaee
- The Gene & Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, 1505 NE Stadium Way, Pullman, Washington 99164, United States
- Department of Chemistry, Washington State University, 1470 NE College Avenue, Pullman, Washington 99164, United States
| | - Shulin Chen
- The Gene & Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, 1505 NE Stadium Way, Pullman, Washington 99164, United States
- Department of Biological Systems Engineering, Washington State University, 1935 E. Grimes Way, Pullman, Washington 99164, United States
| | - Rock J. Mancini
- The Gene & Linda Voiland School of Chemical Engineering and Bioengineering, Washington State University, 1505 NE Stadium Way, Pullman, Washington 99164, United States
- Department of Chemistry, Washington State University, 1470 NE College Avenue, Pullman, Washington 99164, United States
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Huang W, Wachemo AC, Yuan H, Li X. Modification of corn stover for improving biodegradability and anaerobic digestion performance by Ceriporiopsis subvermispora. BIORESOURCE TECHNOLOGY 2019; 283:76-85. [PMID: 30901591 DOI: 10.1016/j.biortech.2019.02.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 02/03/2019] [Accepted: 02/06/2019] [Indexed: 06/09/2023]
Abstract
Ceriporiopsis subvermispora was used to modify corn stover for improving the biodegradability and biomethane yield. Corn stover was incubated with C. subvermispora for 5-90 days then anaerobically digested. It was found that the corn stover modified for 15 days achieved the highest biomethane yield of 235 mL·g-1 VS, which was an increase of 15.2% over that of the non-modified one. The mechanism analyses indicated that the improvement resulted from the combined roles of degradation selectivity, destruction of lignocellulosic structures, and linkages. The analyses showed that C. subvermispora has a high relative selectivity of lignin degradation. The structure of the lignin and the linkages among lignin and hemicellulose and cellulose were broken obviously by acetyl group removal, and the enzymatic hydrolysis of cellulose was increased by 35.61%. The finding indicated that C. subvermispora modification is one of the effective methods for enhancing biomethane yield of corn stover.
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Affiliation(s)
- WenBo Huang
- Department of Environmental Science and Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China
| | - Akiber Chufo Wachemo
- Department of Environmental Science and Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China; Faculty of Water Supply and Environmental Engineering, Arba Minch University, P.O.Box 21, Arba Minch, Ethiopia
| | - HaiRong Yuan
- Department of Environmental Science and Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China
| | - XiuJin Li
- Department of Environmental Science and Engineering, Beijing University of Chemical Technology, 15 Beisanhuan East Road, Chaoyang District, Beijing 100029, PR China.
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Alkali and glycerol pretreatment of West African biomass for production of sugars and ethanol. ACTA ACUST UNITED AC 2019. [DOI: 10.1016/j.biteb.2019.02.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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Abstract
Fungal pretreatment is a biological process that uses rotting fungi to reduce the recalcitrance and enhance the enzymatic digestibility of lignocellulosic feedstocks at low temperature, without added chemicals and wastewater generation. Thus, it has been presumed to be low cost. However, fungal pretreatment requires longer incubation times and generates lower yields than traditional pretreatments. Thus, this study assesses the techno-economic feasibility of a fungal pretreatment facility for the production of fermentable sugars for a 75,700 m3 (20 million gallons) per year cellulosic bioethanol plant. Four feedstocks were evaluated: perennial grasses, corn stover, agricultural residues other than corn stover, and hardwood. The lowest estimated sugars production cost ($1.6/kg) was obtained from corn stover, and was 4–15 times as much as previous estimates for conventional pretreatment technologies. The facility-related cost was the major contributor (46–51%) to the sugar production cost, mainly because of the requirement of large equipment in high quantities, due to process bottlenecks such as low sugar yields, low feedstock bulk density, long fungal pretreatment times, and sterilization requirements. At the current state of the technology, fungal pretreatment at biorefinery scale does not appear to be economically feasible, and considerable process improvements are still required to achieve product cost targets.
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13
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Understanding of the contribution of the fungal treatment conditions in a wheat straw biorefinery that produces enzymes and biogas. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2018.09.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Pandey RK, Chand K, Tewari L. Solid state fermentation and crude cellulase based bioconversion of potential bamboo biomass to reducing sugar for bioenergy production. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:4411-4419. [PMID: 29435990 DOI: 10.1002/jsfa.8963] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 02/04/2018] [Accepted: 02/08/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND Lignocellulosic biomass from bamboo is an attractive feedstock for the bioethanol industry owing to its high cellulosic content and fast growth rate. In this study, powdery biomass was first enzymatically delignified and then saccharified using crude enzymes. RESULTS The biological pretreatment decreased the lignin content of the biomass from an initial value of 295 to 137.7 g kg-1 , with a simultaneous increase in exposed cellulose content from 379.3 to 615.9 g kg-1 . For optimization of the saccharification, response surface methodology was adopted using a three-factor/three-level Box-Behnken design with crude fungal cellulase loading (FPU g-1 substrate), substrate concentration (% w/v) and saccharification temperature (°C) as the main process parameters. A maximum saccharification yield of 47.19% was achieved under the optimized conditions (cellulase enzyme 18.4 FPU g-1 substrate, substrate concentration 1.0% w/v, temperature 39.49 °C). Biological delignification and saccharification of the biomass were further confirmed through scanning electron microscopy analysis. CONCLUSION It is evident from the study that bamboo, as a renewable energy bioresource, can be hydrolysed to reducing sugars by using crude laccase/cellulase enzymes of fungal origin with good saccharification yield. Thus crude enzyme preparations could be utilized efficiently for eco-friendly and cost-effective bioethanol production. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Raj Kumar Pandey
- Department of Microbiology, College of Basic Sciences and Humanities, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India
| | - Khan Chand
- Department of Post Harvest Process and Food Engineering, College of Technology, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India
| | - Lakshmi Tewari
- Department of Microbiology, College of Basic Sciences and Humanities, G.B. Pant University of Agriculture and Technology, Pantnagar, Uttarakhand, India
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Naresh Kumar M, Ravikumar R, Thenmozhi S, Kirupa Sankar M. Development of natural cellulase inhibitor mediated intensified biological pretreatment technology using Pleurotus florida for maximum recovery of cellulose from paddy straw under solid state condition. BIORESOURCE TECHNOLOGY 2017; 244:353-361. [PMID: 28780270 DOI: 10.1016/j.biortech.2017.07.105] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 07/19/2017] [Accepted: 07/20/2017] [Indexed: 05/28/2023]
Abstract
Inhibitor mediated intensified bio-pretreatment (IMBP) technology using natural cellulase inhibitor (NCI) for maximum cellulose recovery from paddy straw was studied. Pretreatment was carried out under solid state condition. Supplementation of 8% NCI in pretreatment medium improves cellulose recovery and delignification by 1.2 and 1.5-fold respectively, compared to conventional bio-pretreatment due to inhibition of 61% of cellulase activity in IMBP. Further increase in NCI concentration showed negative effect on Pleurotus florida growth and suppress the laccase productivity by 1.1-fold. Laccase activity in IMBP was found to be 2.0U/mL on 19thday, which is higher than (1.5U/mL) conventional bio-pretreatment. Physico-chemical modifications in paddy straw before and after pretreatment were analysed by SEM, ATR-FTIR, XRD and TGA. According to these findings, the IMBP technology can be a viable eco-friendly technology for sustainable production of bioethanol with maximum cellulose recovery.
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Affiliation(s)
- Manickam Naresh Kumar
- Bioenergy Research Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Erode 638401, TN, India
| | - Rajarathinam Ravikumar
- Bioenergy Research Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Erode 638401, TN, India.
| | - Senniyappan Thenmozhi
- Bioenergy Research Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Erode 638401, TN, India
| | - Muthuvelu Kirupa Sankar
- Bioenergy Research Laboratory, Department of Biotechnology, Bannari Amman Institute of Technology, Sathyamangalam, Erode 638401, TN, India
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Dal Picolli T, Regalin Aver K, Claudete Fontana R, Camassola M. High-performance of Agaricus blazei fungus for the biological pretreatment of elephant grass. Biotechnol Prog 2017; 34:42-50. [PMID: 28726354 DOI: 10.1002/btpr.2529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 06/21/2017] [Indexed: 11/09/2022]
Abstract
Biological pre-treatment seems to be promising being an eco-friendly process, with no inhibitor generated during the process. The potential for elephant grass pre-treatment with white degradation fungi Pleurotus ostreatus, Agaricus blazei, Lentinula edodes, Pleurotus citrinopileatus, and Pleurotus djamor, in isolated or mixed cultures of these strains, was evaluated. The highest activities of enzymes involved in the degradation of lignocellulosic biomass (laccases, endoglucanases, xylanases, and β-glucosidases) were observed for A. blazei, L. edodes and the combination of P. ostreatus and A. blazei. In the enzymatic hydrolysis, there was greater release of reducing sugars in the pre-treated elephant grass samples by A. blazei during 10 days (338.91 ± 7.39 mg g-1 of biomass). For this sample, higher lignin reductions, 24.81 and 57.45%, after 15 and 35 days of incubation, respectively, were also verified. These data indicate the potential of macromycetes such as A. blazei to perform biological pre-treatments. © 2017 American Institute of Chemical Engineers Biotechnol. Prog., 34:42-50, 2018.
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Affiliation(s)
- Thais Dal Picolli
- Enzymes and Biomass Laboratory, Institute of Biotechnology, University of Caxias do Sul, RS, Brazil
| | - Kaliane Regalin Aver
- Enzymes and Biomass Laboratory, Institute of Biotechnology, University of Caxias do Sul, RS, Brazil
| | - Roselei Claudete Fontana
- Enzymes and Biomass Laboratory, Institute of Biotechnology, University of Caxias do Sul, RS, Brazil
| | - Marli Camassola
- Enzymes and Biomass Laboratory, Institute of Biotechnology, University of Caxias do Sul, RS, Brazil
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17
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Chemical and Biological Pretreatments on Sugarcane Bagasse to Enhance its Enzymatic Hydrolysis. ChemistrySelect 2017. [DOI: 10.1002/slct.201700425] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Bilal M, Asgher M, Iqbal HMN, Ramzan M. Enhanced Bio-ethanol Production from Old Newspapers Waste Through Alkali and Enzymatic Delignification. WASTE AND BIOMASS VALORIZATION 2017. [DOI: 10.1007/s12649-017-9871-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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Kandhola G, Rajan K, Labbé N, Chmely S, Heringer N, Kim JW, Hood EE, Carrier DJ. Beneficial effects of Trametes versicolor pretreatment on saccharification and lignin enrichment of organosolv-pretreated pinewood. RSC Adv 2017. [DOI: 10.1039/c7ra09188e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Fungi-treated pinewood yields more organosolv lignin rich in p-hydroxyphenyl (H) subunits.
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Affiliation(s)
- Gurshagan Kandhola
- Department of Biological and Agricultural Engineering
- Institute for Nanoscience and Engineering
- University of Arkansas
- Fayetteville
- USA
| | - Kalavathy Rajan
- Department of Biosystems Engineering and Soil Science
- The University of Tennessee
- Knoxville
- USA
- Center for Renewable Carbon
| | - Nicole Labbé
- Center for Renewable Carbon
- The University of Tennessee Institute of Agriculture
- Knoxville
- USA
| | - Stephen Chmely
- Center for Renewable Carbon
- The University of Tennessee Institute of Agriculture
- Knoxville
- USA
| | - Nelson Heringer
- Department of Biological and Agricultural Engineering
- Institute for Nanoscience and Engineering
- University of Arkansas
- Fayetteville
- USA
| | - Jin-Woo Kim
- Department of Biological and Agricultural Engineering
- Institute for Nanoscience and Engineering
- University of Arkansas
- Fayetteville
- USA
| | | | - Danielle Julie Carrier
- Department of Biological and Agricultural Engineering
- Institute for Nanoscience and Engineering
- University of Arkansas
- Fayetteville
- USA
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20
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Kumari S, Das D. Biologically pretreated sugarcane top as a potential raw material for the enhancement of gaseous energy recovery by two stage biohythane process. BIORESOURCE TECHNOLOGY 2016; 218:1090-1097. [PMID: 27469089 DOI: 10.1016/j.biortech.2016.07.070] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2016] [Revised: 07/16/2016] [Accepted: 07/18/2016] [Indexed: 06/06/2023]
Abstract
The aim of the present study was to develop a suitable pretreatment method to enhance the microbial degradation of lignocellulosic biomass and to maximize the overall energy recovery by using biohythane process. An efficient and eco-friendly biological pretreatment was used. Maximum lignin removal using biological pretreatment of sugarcane top was 60.4% w/w after 21d incubation at 28°C in static condition. Confocal microscopy observation and FTIR analysis confirmed the removal of lignin from sugarcane top. The maximum hydrogen production rate (Rm), hydrogen production potential (P) and lag time (λ) using pretreated sugarcane top were 16.76mL/g-VS/h, 87.40mL/g-VS and 3.38h respectively. The maximum methane production potential using spent medium of dark fermentation was 180.86mL/g-VS with the lag time of 2.9d. The overall gaseous energy recovery was 37.7% which is 54% higher than that of the untreated one.
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Affiliation(s)
- Sinu Kumari
- Advanced Technology Development Center, Indian Institute of Technology, Kharagpur 721302, India
| | - Debabrata Das
- Department of Biotechnology, Indian Institute of Technology, Kharagpur 721302, India.
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21
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Bahmani MA, Shafiei M, Karimi K. Anaerobic digestion as a pretreatment to enhance ethanol yield from lignocelluloses. Process Biochem 2016. [DOI: 10.1016/j.procbio.2016.05.012] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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22
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Masran R, Zanirun Z, Bahrin EK, Ibrahim MF, Lai Yee P, Abd-Aziz S. Harnessing the potential of ligninolytic enzymes for lignocellulosic biomass pretreatment. Appl Microbiol Biotechnol 2016; 100:5231-46. [DOI: 10.1007/s00253-016-7545-1] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2016] [Revised: 04/07/2016] [Accepted: 04/12/2016] [Indexed: 01/15/2023]
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23
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Lalak J, Kasprzycka A, Martyniak D, Tys J. Effect of biological pretreatment of Agropyron elongatum 'BAMAR' on biogas production by anaerobic digestion. BIORESOURCE TECHNOLOGY 2016; 200:194-200. [PMID: 26492171 DOI: 10.1016/j.biortech.2015.10.022] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Revised: 10/08/2015] [Accepted: 10/10/2015] [Indexed: 06/05/2023]
Abstract
The aim of this work was to analyze the impact of three different moisture contents (MC), at 45% MC, 65% MC, 75% MC, on the degradation of cellulose, hemicellulose, and lignin during fungi treatment by Flammulina velutipes of Agropyron elongatum 'BAMAR' and on biogas production. The analysis of chemical composition shown that F. velutipes had greater selectivity for lignin biodegradation with the highest hemicellulose and lignin removal at 29.1% and 35.4%, respectively, and lowest cellulose removal (20.48%) at 65% MC. F. velutipes cultivated at 65% MC increased biogas production of 398.07Ndm(3)kg(-1)VS(-1), which was 120% higher than the untreated sample. These treatment conditions resulted in 134% more methane yield compared with untreated sample. The results of this study suggested that A. elongatum is a potential biomass for biogas production in agriculture biogas plant and white-rot fungus F. velutipes provides an effective methods for improve biodegradation of A. elongatum.
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Affiliation(s)
- Justyna Lalak
- Institute of Agrophysics Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland.
| | - Agnieszka Kasprzycka
- Institute of Agrophysics Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
| | - Danuta Martyniak
- The Plant Breeding and Acclimatization Institute (IHAR) - National Research Institute, Radzików, 05-870 Błonie, Poland
| | - Jerzy Tys
- Institute of Agrophysics Polish Academy of Sciences, Doświadczalna 4, 20-290 Lublin, Poland
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24
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Thomsen ST, Londoño JEG, Ambye-Jensen M, Heiske S, Kádár Z, Meyer AS. Combination of ensiling and fungal delignification as effective wheat straw pretreatment. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:16. [PMID: 26819628 PMCID: PMC4728756 DOI: 10.1186/s13068-016-0437-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2015] [Accepted: 01/08/2016] [Indexed: 05/14/2023]
Abstract
BACKGROUND Utilization of lignocellulosic feedstocks for bioenergy production in developing countries demands competitive but low-tech conversion routes. White-rot fungi (WRF) inoculation and ensiling are two methods previously investigated for low-tech pretreatment of biomasses such as wheat straw (WS). This study was undertaken to assess whether a combination of forced ensiling with Lactobacillus buchneri and WRF treatment using a low cellulase fungus, Ceriporiopsis subvermispora, could produce a relevant pretreatment effect on WS for bioethanol and biogas production. RESULTS A combination of the ensiling and WRF treatment induced efficient pretreatment of WS by reducing lignin content and increasing enzymatic sugar release, thereby enabling an ethanol yield of 66 % of the theoretical max on the WS glucan, i.e. a yield comparable to yields obtained with high-tech, large-scale pretreatment methods. The pretreatment effect was reached with only a minor total solids loss of 5 % by weight mainly caused by the fungal metabolism. The combination of the biopretreatments did not improve the methane potential of the WS, but improved the initial biogas production rate significantly. CONCLUSION The combination of the L. buchneri ensiling and C. subvermispora WRF treatment provided a significant improvement in the pretreatment effect on WS. This combined biopretreatment produced particularly promising results for ethanol production.
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Affiliation(s)
- Sune T. Thomsen
- />Department of Chemical and Biochemical Engineering, Center for BioProcess Engineering, Technical University of Denmark, DK-2800 Kgs, Lyngby, Denmark
| | - Jorge E. G. Londoño
- />Department of Chemical and Biochemical Engineering, Center for BioProcess Engineering, Technical University of Denmark, DK-2800 Kgs, Lyngby, Denmark
| | - Morten Ambye-Jensen
- />Department of Chemical and Biochemical Engineering, Center for BioProcess Engineering, Technical University of Denmark, DK-2800 Kgs, Lyngby, Denmark
- />Department of Engineering, Biological and Chemical Engineering Section, Aarhus University, Aarhus, Denmark
| | - Stefan Heiske
- />Department of Chemical and Biochemical Engineering, Center for BioProcess Engineering, Technical University of Denmark, DK-2800 Kgs, Lyngby, Denmark
| | - Zsofia Kádár
- />Department of Chemical and Biochemical Engineering, Center for BioProcess Engineering, Technical University of Denmark, DK-2800 Kgs, Lyngby, Denmark
| | - Anne S. Meyer
- />Department of Chemical and Biochemical Engineering, Center for BioProcess Engineering, Technical University of Denmark, DK-2800 Kgs, Lyngby, Denmark
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25
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Silveira MHL, Morais ARC, da Costa Lopes AM, Olekszyszen DN, Bogel-Łukasik R, Andreaus J, Pereira Ramos L. Current Pretreatment Technologies for the Development of Cellulosic Ethanol and Biorefineries. CHEMSUSCHEM 2015; 8:3366-90. [PMID: 26365899 DOI: 10.1002/cssc.201500282] [Citation(s) in RCA: 148] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 06/03/2015] [Indexed: 05/08/2023]
Abstract
Lignocellulosic materials, such as forest, agriculture, and agroindustrial residues, are among the most important resources for biorefineries to provide fuels, chemicals, and materials in such a way to substitute for, at least in part, the role of petrochemistry in modern society. Most of these sustainable biorefinery products can be produced from plant polysaccharides (glucans, hemicelluloses, starch, and pectic materials) and lignin. In this scenario, cellulosic ethanol has been considered for decades as one of the most promising alternatives to mitigate fossil fuel dependence and carbon dioxide accumulation in the atmosphere. However, a pretreatment method is required to overcome the physical and chemical barriers that exist in the lignin-carbohydrate composite and to render most, if not all, of the plant cell wall components easily available for conversion into valuable products, including the fuel ethanol. Hence, pretreatment is a key step for an economically viable biorefinery. Successful pretreatment method must lead to partial or total separation of the lignocellulosic components, increasing the accessibility of holocellulose to enzymatic hydrolysis with the least inhibitory compounds being released for subsequent steps of enzymatic hydrolysis and fermentation. Each pretreatment technology has a different specificity against both carbohydrates and lignin and may or may not be efficient for different types of biomasses. Furthermore, it is also desirable to develop pretreatment methods with chemicals that are greener and effluent streams that have a lower impact on the environment. This paper provides an overview of the most important pretreatment methods available, including those that are based on the use of green solvents (supercritical fluids and ionic liquids).
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Affiliation(s)
- Marcos Henrique Luciano Silveira
- CEPESQ, Research Center in Applied Chemistry, Department of Chemistry, Federal University of Paraná, Curitiba, PR, 81531-970, Brazil
| | - Ana Rita C Morais
- Unit of Bioenergy, National Laboratory of Energy and Geology, 1649-038, Lisbon, Portugal
- LAQV/REQUIMTE, Department of Chemistry, Faculty of Science and Technology, New University of Lisbon, 2829-516, Caparica, Portugal
| | - Andre M da Costa Lopes
- Unit of Bioenergy, National Laboratory of Energy and Geology, 1649-038, Lisbon, Portugal
- LAQV/REQUIMTE, Department of Chemistry, Faculty of Science and Technology, New University of Lisbon, 2829-516, Caparica, Portugal
| | | | - Rafał Bogel-Łukasik
- Unit of Bioenergy, National Laboratory of Energy and Geology, 1649-038, Lisbon, Portugal.
| | - Jürgen Andreaus
- Department of Chemistry, Regional University of Blumenau, Blumenau, SC, 89012 900, Brazil.
| | - Luiz Pereira Ramos
- CEPESQ, Research Center in Applied Chemistry, Department of Chemistry, Federal University of Paraná, Curitiba, PR, 81531-970, Brazil.
- INCT Energy and Environment (INCT E&A), Department of Chemistry, Federal University of Paraná.
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26
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Metabolite secretion, Fe3+-reducing activity and wood degradation by the white-rot fungus Trametes versicolor ATCC 20869. Fungal Biol 2014; 118:935-42. [DOI: 10.1016/j.funbio.2014.08.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 08/21/2014] [Accepted: 08/22/2014] [Indexed: 11/24/2022]
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27
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Zhao J, Ge X, Vasco-Correa J, Li Y. Fungal pretreatment of unsterilized yard trimmings for enhanced methane production by solid-state anaerobic digestion. BIORESOURCE TECHNOLOGY 2014; 158:248-52. [PMID: 24607461 DOI: 10.1016/j.biortech.2014.02.029] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2013] [Revised: 02/06/2014] [Accepted: 02/08/2014] [Indexed: 05/25/2023]
Abstract
Fungal pretreatment is an environmentally friendly process that has been widely studied to improve the digestibility of lignocellulosic biomass. However, sterilization of feedstocks, a costly process, is generally required prior to the fungal pretreatment. In this study, fungal pretreatment of unsterilized yard trimmings using yard trimmings pre-colonized with Ceriporiopsis subvermispora as an inoculum was investigated. Degradation of lignin, cellulose, hemicellulose, and dry matter in yard trimmings during 30 days of fungal pretreatment using different inoculum/substrate ratios (1:19, 1:9 and 1:4) was 14.8-20.2%, 8.1-15.4%, 20.7-27.8%, and 9.8-16.2%, respectively. Methane yields of 34.9-44.6L/kg volatile solids were achieved during solid-state anaerobic digestion (SS-AD) of the pretreated yard trimmings, which were comparable to those obtained by using the traditional method requiring feedstock sterilization. The technology developed in this study can save about 501-789 kJ/kg of dry yard trimmings processed, which is about half of the total biogas energy produced by SS-AD.
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Affiliation(s)
- Jia Zhao
- Department of Food, Agricultural and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA
| | - Xumeng Ge
- Department of Food, Agricultural and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA
| | - Juliana Vasco-Correa
- Department of Food, Agricultural and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA
| | - Yebo Li
- Department of Food, Agricultural and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA.
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28
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Maki M, Iskhakova S, Zhang T, Qin W. Bacterial consortia constructed for the decomposition of Agave biomass. Bioengineered 2014; 5:165-72. [PMID: 24637707 DOI: 10.4161/bioe.28431] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Research has shown that a greater variety of enzymes, as well as variety of microorganisms producing enzymes, can have an overall synergistic effect on the decomposition of lignocellulosic biomass for the production of value-added bio-products. Here, 8 cellulase-degrading bacterial isolates were selected to develop co-, tri-, and tetra-cultures for the decomposition of lignocellulosic biomass. Glucose and xylose equivalents released from imitation biomass media containing 0.5% (w/v) beechwood xylan and 0.5% (w/v) Avicel was measured using di-nitrosalicylic acid for all consortia, along with cell growth and survival. Thereafter, 6 co- and 2 tri-cultures with greatest decomposition were examined for ability to degrade Agave americana fiber. Interestingly, when strains were paired up in co-culture, four pairs: G+5, G+A, C+A1, and G+A1 produced high reducing sugars in 24 h: 6 µM, 8 µM, 8 µM, and finally, 6 µM, respectively. From 4 co-cultures with highest reducing sugar equivalents, tri- and tetra-cultures were produced. The bacterial consortia which had the highest reducing sugars detected were 2 tri-cultures: G + A1 + A4 and G + A1 + 5, displaying levels as high as 9 µM and 5 µM in day 1, respectively. All co- and tri-cultures maintained high cell survival for 14 days with 0.5 g ground Agave. Upon evaluating Agave dry weight after treatment, it was evident that almost half the biomass could be decomposed in 14 days. Scanning electron microscopy of treated Agave supported decomposition when compared with the control. These bacterial consortia have potential for further study of value-added by-product production during metabolism of lignocellulosic biomasses.
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Affiliation(s)
- Miranda Maki
- Department of Biology; Lakehead University; Thunder Bay, ON Canada
| | | | - Tingzhou Zhang
- Department of Environmental Engineering; Zhejiang Gongshang University; Hangzhou, China
| | - Wensheng Qin
- Department of Biology; Lakehead University; Thunder Bay, ON Canada
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29
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Zhao J, Zheng Y, Li Y. Fungal pretreatment of yard trimmings for enhancement of methane yield from solid-state anaerobic digestion. BIORESOURCE TECHNOLOGY 2014; 156:176-81. [PMID: 24502916 DOI: 10.1016/j.biortech.2014.01.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2013] [Revised: 01/01/2014] [Accepted: 01/04/2014] [Indexed: 05/27/2023]
Abstract
Yard trimmings were pretreated by Ceriporiopsis subvermispora, a white-rot fungus that selectively degrades lignin, to enhance methane production via solid-state anaerobic digestion. Effects of moisture content (MC), at 45%, 60%, and 75%, on the degradation of holocellulose and lignin in the fungal pretreatment step and on methane production in the digestion step were studied with comparison to the control group (autoclaved without inoculation) and raw yard trimmings. It was found that C. subvermispora had a high lignin degradation of 20.9% but limited cellulose degradation of 7.4% at 60% MC. Consequently, samples pretreated at 60% MC achieved the highest methane yield of 44.6L/kg volatile solid (VS) in the digestion step, which was 106% and 154% higher than the control group (21.6L/kg VS) and the raw yard trimmings (17.6L/kg VS), respectively. The increase in methane production was probably caused by the degradation of lignin during the pretreatment.
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Affiliation(s)
- Jia Zhao
- Department of Food, Agricultural, and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA
| | - Yi Zheng
- Department of Food, Agricultural, and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA
| | - Yebo Li
- Department of Food, Agricultural, and Biological Engineering, The Ohio State University/Ohio Agricultural Research and Development Center, 1680 Madison Ave., Wooster, OH 44691-4096, USA.
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30
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Nazarpour F, Abdullah DK, Abdullah N, Motedayen N, Zamiri R. Biological pretreatment of rubberwood with Ceriporiopsis subvermispora for enzymatic hydrolysis and bioethanol production. BIOMED RESEARCH INTERNATIONAL 2013; 2013:268349. [PMID: 24167813 PMCID: PMC3792517 DOI: 10.1155/2013/268349] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Revised: 07/16/2013] [Accepted: 08/23/2013] [Indexed: 11/18/2022]
Abstract
Rubberwood (Hevea brasiliensis), a potential raw material for bioethanol production due to its high cellulose content, was used as a novel feedstock for enzymatic hydrolysis and bioethanol production using biological pretreatment. To improve ethanol production, rubberwood was pretreated with white rot fungus Ceriporiopsis subvermispora to increase fermentation efficiency. The effects of particle size of rubberwood (1 mm, 0.5 mm, and 0.25 mm) and pretreatment time on the biological pretreatment were first determined by chemical analysis and X-ray diffraction and their best condition obtained with 1 mm particle size and 90 days pretreatment. Further morphological study on rubberwood with 1 mm particle size pretreated by fungus was performed by FT-IR spectra analysis and SEM observation and the result indicated the ability of this fungus for pretreatment. A study on enzymatic hydrolysis resulted in an increased sugar yield of 27.67% as compared with untreated rubberwood (2.88%). The maximum ethanol concentration and yield were 17.9 g/L and 53% yield, respectively, after 120 hours. The results obtained demonstrate that rubberwood pretreated by C. subvermispora can be used as an alternative material for the enzymatic hydrolysis and bioethanol production.
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Affiliation(s)
- Forough Nazarpour
- Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Dzulkefly Kuang Abdullah
- Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Norhafizah Abdullah
- Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
- Department of Chemical and Environmental Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Nazila Motedayen
- Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
| | - Reza Zamiri
- Department of Materials Engineering and Ceramic, CICECO, University of Aveiro, Campus Santiago, 3810-193 Aveiro, Portugal
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