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de Sousa Nascimento L, Melo Nascimento RJ, da Mata AKA, Felipe VTA, Araújo RF, Bezerra LCA, Almeida JS, Mattos ALA, Uchoa DEA, de Novais LMR, D'Oca CDRM, Avelino F. Development of a phosphorous-based biorefinery process for producing lignocellulosic functional materials from coconut wastes. Int J Biol Macromol 2023; 239:124300. [PMID: 37011748 DOI: 10.1016/j.ijbiomac.2023.124300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2022] [Revised: 03/15/2023] [Accepted: 03/29/2023] [Indexed: 04/03/2023]
Abstract
This work aimed to develop a phosphorous-based biorefinery process for obtaining phosphorylated lignocellulosic fractions in a one-pot protocol from coconut fiber. Natural coconut fiber (NCF) was mixed with 85 % m/m H3PO4 at 70 °C for 1 h to yield the modified coconut fiber (MCF), aqueous phase (AP), and coconut fiber lignin (CFL). MCF was characterized by its TAPPI, FTIR, SEM, EDX, TGA, WCA, and P content. AP was characterized regarding its pH, conductivity, glucose, furfural, HMF, total sugars and ASL contents. CFL structure was evaluated by FTIR, 1H, 31P and 1H-13C HSQC NMR, TGA and P content and was compared to that of milled wood lignin (MWL). It was observed that MCF and CFL were phosphorylated during the pulping (0.54 and 0.23 % wt., respectively), while AP has shown high sugar levels, low inhibitor content, and some remaining phosphorous. The phosphorylation of MCF and CFL also showed an enhancement of their thermal and thermo-oxidative properties. The results show that a platform of functional materials such as biosorbents, biofuels, flame retardants, and biocomposites can be created through an eco-friendly, simple, fast, and novel biorefinery process.
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Li C, Du X, Liu ZH, Li BZ, Meng X, Zhao J, Zhao ZM, Ragauskas AJ. Steam explosion pretreatment coupling high-temperature short-time sterilization facilitating cellulose degradation and sporulation-regulatory gene expression in high-solid fermentation. Int J Biol Macromol 2023; 232:123475. [PMID: 36720325 DOI: 10.1016/j.ijbiomac.2023.123475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 01/21/2023] [Accepted: 01/25/2023] [Indexed: 01/29/2023]
Abstract
Steam explosion coupling high-temperature short-time sterilization (SE-HTST) was exploited to modify cellulosic biomass medium properties and promote high-solid fermentation (HSF). Biomass characterization analysis showed that SE-HTST enlarged microstructural pores and cavities in solid media, providing more effective space for microbial growth. Meanwhile, SE-HTST helped to release glucose from the cellulose with 35.8 ± 4.5, 20.0 ± 2.3, and 12.3 ± 5.7 mg glucose/g dry medium at 24, 48, and 72 h of fermentation, which were 3.1, 2.3, and 1.5 times higher than that in medium from conventional thermal sterilization (CTS), respectively. SE-HTST increased the viable cell and spore number of Bacillus subtilis by 1.8 and 1.6 times at 72 h of fermentation compared to CTS. Moreover, the expressions of master transcriptional gene spo0A and the early sigma factors of sigF and sigE genes gradually increased in the SE-HTST medium, showing enhanced sporulation in HSF. Therefore, SE-HTST is an effective strategy for facilitating cellulose degradation, improving glucose nutrients in biomass medium, and promoting sporulation-regulatory gene expression during high-solid fermentation, which enhances the production of microbial ecological agents using B. subtilis significantly.
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Affiliation(s)
- Chonglei Li
- School of Ecology and Environment, Inner Mongolia Key Laboratory of Environmental Pollution Control & Wastes Reuse, Inner Mongolia University, Hohhot 010021, China
| | - Xiaoyu Du
- School of Ecology and Environment, Inner Mongolia Key Laboratory of Environmental Pollution Control & Wastes Reuse, Inner Mongolia University, Hohhot 010021, China
| | - Zhi-Hua Liu
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering, Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Bing-Zhi Li
- Frontiers Science Center for Synthetic Biology and Key Laboratory of Systems Bioengineering, Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
| | - Xianzhi Meng
- Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, United States
| | - Ji Zhao
- School of Ecology and Environment, Inner Mongolia Key Laboratory of Environmental Pollution Control & Wastes Reuse, Inner Mongolia University, Hohhot 010021, China
| | - Zhi-Min Zhao
- School of Ecology and Environment, Inner Mongolia Key Laboratory of Environmental Pollution Control & Wastes Reuse, Inner Mongolia University, Hohhot 010021, China; Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, United States; Joint Institute of Biological Sciences, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States.
| | - Arthur J Ragauskas
- Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN 37996, United States; Joint Institute of Biological Sciences, Biosciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, United States; Center for Renewable Carbon, Department of Forestry, Wildlife, and Fisheries, University of Tennessee Institute of Agriculture, Knoxville, TN 37996, United States.
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Álvarez C, González A, Ballesteros I, Gullón B, Negro MJ. In Vitro Assessment of the Prebiotic Potential of Xylooligosaccharides from Barley Straw. Foods 2022; 12:foods12010083. [PMID: 36613299 PMCID: PMC9818743 DOI: 10.3390/foods12010083] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/12/2022] [Accepted: 12/19/2022] [Indexed: 12/29/2022] Open
Abstract
Barley straw was subjected to hydrothermal pretreatment (steam explosion) processing to evaluate its potential as a raw material to produce xylooligosaccharides (XOS) suitable for use as a prebiotic. The steam explosion pretreatment generated a liquid fraction containing solubilised hemicellulose. This fraction was purified using gel permeation chromatography to obtain a fraction rich in XOS DP2-DP6. The sample was characterised through analytical techniques such as HPAEC-PAD, FTIR and MALDI-TOF-MS. The prebiotic activity was evaluated using in vitro fermentation in human faecal cultures through the quantification of short-chain fatty acid (SCFA) and lactate production, the evolution of the pH and the consumption of carbon sources. The total SCFA production at the end of fermentation (30 h) was 90.1 mM. Positive significant differences between the amount of XOS from barley straw and fructooligosaccharides after incubation were observed.
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Affiliation(s)
- Cristina Álvarez
- Advanced Biofuels and Bioproducts Unit, Department of Energy, Research Centre for Energy, Environment and Technology (CIEMAT), 28040 Madrid, Spain
- Correspondence: ; Tel.: +34-91-346-60-57
| | - Alberto González
- Advanced Biofuels and Bioproducts Unit, Department of Energy, Research Centre for Energy, Environment and Technology (CIEMAT), 28040 Madrid, Spain
| | - Ignacio Ballesteros
- Advanced Biofuels and Bioproducts Unit, Department of Energy, Research Centre for Energy, Environment and Technology (CIEMAT), 28040 Madrid, Spain
| | - Beatriz Gullón
- Department of Chemical Engineering, Faculty of Science, University of Vigo (Campus Ourense), As Lagoas, 32004 Ourense, Spain
| | - María José Negro
- Advanced Biofuels and Bioproducts Unit, Department of Energy, Research Centre for Energy, Environment and Technology (CIEMAT), 28040 Madrid, Spain
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Tong D, Zhan P, Zhang W, Zhou Y, Huang Y, Qing Y, Chen J. Surfactant‐Assisted Dilute Phosphoric Acid Plus Steam Explosion of Poplar for Fermentable Sugar Production. ChemistrySelect 2022. [DOI: 10.1002/slct.202200423] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Denghui Tong
- Ministry of Forestry Bioethanol Research Center Central South University of Forestry and Technology Changsha 410004 China
- Hunan Engineering Research Center for Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- Hunan International Joint Laboratory of Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- School of Materials Science and Engineering Central South University of Forestry and Technology Changsha 410004, China
| | - Peng Zhan
- Ministry of Forestry Bioethanol Research Center Central South University of Forestry and Technology Changsha 410004 China
- Hunan Engineering Research Center for Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- Hunan International Joint Laboratory of Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- School of Materials Science and Engineering Central South University of Forestry and Technology Changsha 410004, China
| | - Weifeng Zhang
- Ministry of Forestry Bioethanol Research Center Central South University of Forestry and Technology Changsha 410004 China
- Hunan Engineering Research Center for Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- Hunan International Joint Laboratory of Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- School of Materials Science and Engineering Central South University of Forestry and Technology Changsha 410004, China
| | - Yongcai Zhou
- Ministry of Forestry Bioethanol Research Center Central South University of Forestry and Technology Changsha 410004 China
- Hunan Engineering Research Center for Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- Hunan International Joint Laboratory of Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- School of Materials Science and Engineering Central South University of Forestry and Technology Changsha 410004, China
| | - Yilei Huang
- Ministry of Forestry Bioethanol Research Center Central South University of Forestry and Technology Changsha 410004 China
- Hunan Engineering Research Center for Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- Hunan International Joint Laboratory of Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- School of Materials Science and Engineering Central South University of Forestry and Technology Changsha 410004, China
| | - Yan Qing
- Ministry of Forestry Bioethanol Research Center Central South University of Forestry and Technology Changsha 410004 China
- Hunan Engineering Research Center for Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- Hunan International Joint Laboratory of Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- School of Materials Science and Engineering Central South University of Forestry and Technology Changsha 410004, China
| | - Jienan Chen
- Ministry of Forestry Bioethanol Research Center Central South University of Forestry and Technology Changsha 410004 China
- Hunan Engineering Research Center for Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- Hunan International Joint Laboratory of Woody Biomass Conversion Central South University of Forestry and Technology Changsha 410004 China
- School of Materials Science and Engineering Central South University of Forestry and Technology Changsha 410004, China
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Servian-Rivas LD, Pachón ER, Rodríguez M, González-Miquel M, González EJ, Díaz I. Techno-economic and environmental impact assessment of an olive tree pruning waste multiproduct biorefinery. FOOD AND BIOPRODUCTS PROCESSING 2022. [DOI: 10.1016/j.fbp.2022.05.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Álvarez C, González A, Ballesteros I, Negro MJ. Production of xylooligosaccharides, bioethanol, and lignin from structural components of barley straw pretreated with a steam explosion. BIORESOURCE TECHNOLOGY 2021; 342:125953. [PMID: 34555750 DOI: 10.1016/j.biortech.2021.125953] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 09/10/2021] [Accepted: 09/12/2021] [Indexed: 06/13/2023]
Abstract
Barley straw (BS) is a potential source to obtain bioethanol and value-added products such as xylooligosaccharides (XOS) and lignin for application in diverse industries. In this study, BS was submitted to steam explosion pretreatment to valorize the main components of this lignocellulose biomass. For hemicellulose fraction valorization, different combinations of endo-β-(1,4)-D-xylanase enzyme with accessory enzymes (α-L-arabinofuranosidase, feruloy -esterase and acetylxylan-esterase) have been studied to produce XOS with a low degree of polymerization. The application of accessory enzymes combined with endo-β-(1,4)-D-xylanase enzymes turned out to be the most effective strategy for the formation of XOS. The solid fraction obtained after the pretreatment was submitted to presacharification and simultaneous saccharification and fermentation process for bioethanol production. The resulting lignin-rich residue was characterized. In this integrated process, 13.0 g XOS (DP2-DP6), 12.6 g ethanol and 16.6 g lignin were obtained from 100 g of BS, achieving the goal of valorizing this agricultural residue.
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Affiliation(s)
- Cristina Álvarez
- Advanced Biofuels and Bioproducts Unit, Renewable Energies Department, CIEMAT, Madrid 28040, Spain.
| | - Alberto González
- Advanced Biofuels and Bioproducts Unit, Renewable Energies Department, CIEMAT, Madrid 28040, Spain.
| | - Ignacio Ballesteros
- Advanced Biofuels and Bioproducts Unit, Renewable Energies Department, CIEMAT, Madrid 28040, Spain.
| | - María José Negro
- Advanced Biofuels and Bioproducts Unit, Renewable Energies Department, CIEMAT, Madrid 28040, Spain.
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Espeso J, Isaza A, Lee JY, Sörensen PM, Jurado P, Avena-Bustillos RDJ, Olaizola M, Arboleya JC. Olive Leaf Waste Management. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2021. [DOI: 10.3389/fsufs.2021.660582] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Olive trees are the oldest known cultivated trees in the world and present-day cultivation is widespread, with an estimated magnitude of 9 million hectares worldwide. As the olive oil industry has continued to grow, so has the environmental impact of olive oil production, such as the energy and water consumption, gas emissions and waste generation. The largest contributor to waste generation are the olive leaves, an abundant and unavoidable byproduct of olive-oil production due to the necessity of tree-pruning. It is estimated that an annual 1.25 million tons of olive leaf waste are generated in Spain alone, around 50% of the total world production. The leaves are currently used for biomass production or animal feed. However, because of their polyphenolic composition, olive leaves have potential in numerous other applications. In this review we analyze the chemical composition of olive leaves, and discuss current processing methods of the olive leaf waste, including thermochemical, biochemical, drying, extraction and condensation methods. We also examine current applications of the treated olive leaves in sectors relating to cattle feed, fertilizers, novel materials, energy generation, and food and pharmaceutical products. The aim of this review is to provide a resource for producers, policy makers, innovators and industry in shaping environmentally sustainable decisions for how olive leaf waste can be utilized and optimized.
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Álvarez C, González A, Alonso JL, Sáez F, Negro MJ, Gullón B. Xylooligosaccharides from steam-exploded barley straw: Structural features and assessment of bifidogenic properties. FOOD AND BIOPRODUCTS PROCESSING 2020. [DOI: 10.1016/j.fbp.2020.08.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Candida intermedia CBS 141442: A Novel Glucose/Xylose Co-Fermenting Isolate for Lignocellulosic Bioethanol Production. ENERGIES 2020. [DOI: 10.3390/en13205363] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The present study describes the isolation of the novel strain Candida intermedia CBS 141442 and investigates the potential of this microorganism for the conversion of lignocellulosic streams. Different C. intermedia clones were isolated during an adaptive laboratory evolution experiment under the selection pressure of lignocellulosic hydrolysate and in strong competition with industrial, xylose-fermenting Saccharomyces cerevisiae cells. Isolates showed different but stable colony and cell morphologies when growing in a solid agar medium (smooth, intermediate and complex morphology) and liquid medium (unicellular, aggregates and pseudohyphal morphology). Clones of the same morphology showed similar fermentation patterns, and the C. intermedia clone I5 (CBS 141442) was selected for further testing due to its superior capacity for xylose consumption (90% of the initial xylose concentration within 72 h) and the highest ethanol yields (0.25 ± 0.02 g ethanol/g sugars consumed). Compared to the well-known yeast Scheffersomyces stipitis, the selected strain showed slightly higher tolerance to the lignocellulosic-derived inhibitors when fermenting a wheat straw hydrolysate. Furthermore, its higher glucose consumption rates (compared to S. stipitis) and its capacity for glucose and xylose co-fermentation makes C. intermedia CBS 141442 an attractive microorganism for the conversion of lignocellulosic substrates, as demonstrated in simultaneous saccharification and fermentation processes.
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Biorefinery of the Olive Tree—Production of Sugars from Enzymatic Hydrolysis of Olive Stone Pretreated by Alkaline Extrusion. ENERGIES 2020. [DOI: 10.3390/en13174517] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This work addresses for the first time the study of olive stone (OS) biomass pretreatment by reactive extrusion technology using NaOH as the chemical agent. It is considered as a first step in the biological conversion process of the carbohydrates contained in the material into bio-based products. OS is a sub-product of the olive oil extraction process that could be used in a context of a multi-feedstock and multi-product biorefinery encompassing all residues generated around the olive oil production sector. OS biomass is pretreated in a twin-screw extruder at varying temperatures—100, 125 and 150 °C and NaOH/biomass ratios of 5% and 15% (dry weight basis), in order to estimate the effectiveness of the process to favour the release of sugars by enzymatic hydrolysis. The results show that alkaline extrusion is effective in increasing the sugar release from OS biomass compared to the raw material, being necessary to apply conditions of 15% NaOH/biomass ratio and 125 °C to attain the best carbohydrate conversion rates of 55.5% for cellulose and 57.7% for xylan in relation to the maximum theoretical achievable. Under these optimal conditions, 31.57 g of total sugars are obtained from 100 g of raw OS.
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11
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Energetic Valorisation of Olive Biomass: Olive-Tree Pruning, Olive Stones and Pomaces. Processes (Basel) 2020. [DOI: 10.3390/pr8050511] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Olive oil industry is one of the most important industries in the world. Currently, the land devoted to olive-tree cultivation around the world is ca. 11 × 106 ha, which produces more than 20 × 106 t olives per year. Most of these olives are destined to the production of olive oils. The main by-products of the olive oil industry are olive-pruning debris, olive stones and different pomaces. In cultures with traditional and intensive typologies, one single ha of olive grove annually generates more than 5 t of these by-products. The disposal of these by-products in the field can led to environmental problems. Notwithstanding, these by-products (biomasses) have a huge potential as source of energy. The objective of this paper is to comprehensively review the latest advances focused on energy production from olive-pruning debris, olive stones and pomaces, including processes such as combustion, gasification and pyrolysis, and the production of biofuels such as bioethanol and biodiesel. Future research efforts required for biofuel production are also discussed. The future of the olive oil industry must move towards a greater interrelation between olive oil production, conservation of the environment and energy generation.
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Tobin T, Gustafson R, Bura R, Gough HL. Integration of wastewater treatment into process design of lignocellulosic biorefineries for improved economic viability. BIOTECHNOLOGY FOR BIOFUELS 2020; 13:24. [PMID: 32025241 PMCID: PMC6998191 DOI: 10.1186/s13068-020-1657-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 01/16/2020] [Indexed: 06/02/2023]
Abstract
BACKGROUND Production and use of bio-based products offer advantages over conventional petrochemicals, yet the relatively high cost of production has restricted their mainstream adoption. Optimization of wastewater treatment processes could reduce capital expenditures, lowering the barrier to market entry for lignocellulosic biorefineries. This paper characterizes wastewater associated with lignocellulosic ethanol production and evaluates potential wastewater treatment operations. RESULTS It is found that organic material is intrinsic to bioconversion wastewater, representing up to 260 kg of biological oxygen demand per tonne of feedstock processed. Inorganics in the wastewater largely originate from additions during pretreatment and pH adjustments, which increase the inorganic loading by 44 kg per tonne of feedstock processed. Adjusting the ethanol production process to decrease addition of inorganic material could reduce the demands and therefore cost of waste treatment. Various waste treatment technologies-including those that take advantage of ecosystem services provided by feedstock production-were compared in terms of capital and operating costs, as well as technical feasibility. CONCLUSIONS It is concluded that wastewater treatment technologies should be better integrated with conversion process design and feedstock production. Efforts to recycle resources throughout the biofuel supply chain through application of ecosystem services provided by adjacent feedstock plantations and recovery of resources from the waste stream to reduce overall capital and operating costs of bioconversion facilities.
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Affiliation(s)
- Tyler Tobin
- The School of Environmental and Forest Sciences, University of Washington, 4000 15th Avenue NE, Seattle, WA 98195-2100 USA
| | - Rick Gustafson
- The School of Environmental and Forest Sciences, University of Washington, 4000 15th Avenue NE, Seattle, WA 98195-2100 USA
| | - Renata Bura
- The School of Environmental and Forest Sciences, University of Washington, 4000 15th Avenue NE, Seattle, WA 98195-2100 USA
| | - Heidi L. Gough
- The School of Environmental and Forest Sciences, University of Washington, 4000 15th Avenue NE, Seattle, WA 98195-2100 USA
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Determination of the Lignocellulosic Components of Olive Tree Pruning Biomass by Near Infrared Spectroscopy. ENERGIES 2019. [DOI: 10.3390/en12132497] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The determination of chemical composition of lignocellulose biomass by wet chemistry analysis is labor-intensive, expensive, and time consuming. Near infrared (NIR) spectroscopy coupled with multivariate calibration offers a rapid and no-destructive alternative method. The objective of this work is to develop a NIR calibration model for olive tree lignocellulosic biomass as a rapid tool and alternative method for chemical characterization of olive tree pruning over current wet methods. In this study, 79 milled olive tree pruning samples were analyzed for extractives, lignin, cellulose, hemicellulose, and ash content. These samples were scanned by reflectance diffuse near infrared techniques and a predictive model based on partial least squares (PLS) multivariate calibration method was developed. Five parameters were calibrated: Lignin, cellulose, hemicellulose, ash, and extractives. NIR models obtained were able to predict main components composition with R2cv values over 0.5, except for lignin which showed lowest prediction accuracy.
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Estrada-Martínez R, Favela-Torres E, Soto-Cruz NO, Escalona-Buendía HB, Saucedo-Castañeda G. A Mild Thermal Pre-treatment of the Organic Fraction of Municipal Wastes Allows High Ethanol Production by Direct Solid-state Fermentation. BIOTECHNOL BIOPROC E 2019. [DOI: 10.1007/s12257-019-0032-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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15
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Martínez-Patiño JC, Ruiz E, Cara C, Romero I, Castro E. Advanced bioethanol production from olive tree biomass using different bioconversion schemes. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2018.06.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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16
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Endophytic Fungi as Pretreatment to Enhance Enzymatic Hydrolysis of Olive Tree Pruning. BIOMED RESEARCH INTERNATIONAL 2017; 2017:9727581. [PMID: 29250553 PMCID: PMC5698607 DOI: 10.1155/2017/9727581] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 09/28/2017] [Accepted: 10/18/2017] [Indexed: 11/17/2022]
Abstract
Olive tree pruning, as one of the most abundant lignocellulosic residues in Mediterranean countries, has been evaluated as a source of sugars for fuel and chemicals production. A mild acid pretreatment has been combined with a fungal pretreatment using either two endophytes (Ulocladium sp. and Hormonema sp.) or a saprophyte (Trametes sp. I-62). The use of endophytes is based on the important role that some of them play during the initial stages of wood decomposition. Without acid treatment, fungal pretreatment with Ulocladium sp. provided a nonsignificant enhancement of 4.6% in glucose digestibility, compared to control. When a mild acid hydrolysis was carried out after fungal pretreatments, significant increases in glucose digestibility from 4.9% to 12.0% (compared to control without fungi) were observed for all fungal pretreatments, with maximum values yielded by Hormonema sp. However, despite the observed digestibility boost, the total sugar yields (taking into account solid yield) were not significantly increased by the pretreatments. Nevertheless, based on these preliminary improvements in digestibility, this work proves the potential of endophytic fungi to boost the production of sugar from olive tree pruning, which would add an extra value to the bioeconomy of olive crops.
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Martínez-Patiño JC, Ruiz E, Romero I, Cara C, López-Linares JC, Castro E. Combined acid/alkaline-peroxide pretreatment of olive tree biomass for bioethanol production. BIORESOURCE TECHNOLOGY 2017; 239:326-335. [PMID: 28531858 DOI: 10.1016/j.biortech.2017.04.102] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 04/24/2017] [Accepted: 04/25/2017] [Indexed: 06/07/2023]
Abstract
Olive tree biomass (OTB) can be used for producing second generation bioethanol. In this work, extracted OTB was subjected to fractionation using a sequential acid/alkaline oxidative pretreatment. In the first acid stage, the effects of sulfuric acid concentration and reaction times at 130°C were investigated. Up to 71% solubilization of hemicellulosic sugars was achieved under optimized conditions (2.4% H2SO4, 84min). In the second stage, the influence of hydrogen peroxide concentration and process time were evaluated at 80°C. Approximately 80% delignification was achieved under the best operational conditions (7% H2O2, 90min) within the experimental range studied. This pretreatment produced a substrate with 72% cellulose that was highly accessible to enzymatic attack, yielding 82g glucose/100g glucose in delignified OTB. Ethanol production from both hemicellulosic sugars solubilized in the acid pretreatment and glucose from enzymatic hydrolysis of delignified OTB yielded 15g ethanol/100g OTB.
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Affiliation(s)
- José Carlos Martínez-Patiño
- Centre for Advanced Studies in Energy and Environment, University of Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
| | - Encarnación Ruiz
- Centre for Advanced Studies in Energy and Environment, University of Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
| | - Inmaculada Romero
- Centre for Advanced Studies in Energy and Environment, University of Jaén, Campus Las Lagunillas, 23071 Jaén, Spain.
| | - Cristóbal Cara
- Centre for Advanced Studies in Energy and Environment, University of Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
| | - Juan Carlos López-Linares
- Centre for Advanced Studies in Energy and Environment, University of Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
| | - Eulogio Castro
- Centre for Advanced Studies in Energy and Environment, University of Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
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Evaluation of lignins from side-streams generated in an olive tree pruning-based biorefinery: Bioethanol production and alkaline pulping. Int J Biol Macromol 2017; 105:238-251. [PMID: 28690167 DOI: 10.1016/j.ijbiomac.2017.07.030] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Revised: 06/30/2017] [Accepted: 07/05/2017] [Indexed: 11/22/2022]
Abstract
In modern lignocellulosic-based biorefineries, carbohydrates can be transformed into biofuels and pulp and paper, whereas lignin is burned to obtain energy. However, a part of lignin could be converted into value-added products including bio-based aromatic chemicals, as well as building blocks for materials. Then, a good knowledge of lignin is necessary to define its valorisation procedure. This study characterized different lignins from side-streams produced from olive tree pruning bioethanol production (lignins collected from steam explosion pretreatment with water or phosphoric acid as catalysts, followed by simultaneous saccharification and fermentation process) and alkaline pulping (lignins recovered from kraft and soda-AQ black liquors). Together with the chemical composition, the structure of lignins was investigated by FTIR, 13C NMR, and 2D NMR. Bioethanol lignins had clearly distinct characteristics compared to pulping lignins; a certain number of side-chain linkages (mostly alkyl-aryl ether and resinol) accompanied with lower phenolic hydroxyls content. Bioethanol lignins also showed a significant amount of carbohydrates, mainly glucose and protein impurities. By contrast, pulping lignins revealed xylose together with a dramatical reduction of side-chains (some resinol linkages survive) and thereby higher phenol content, indicating rather severe lignin degradation during alkaline pulping processes. All lignins showed a predominance of syringyl units.
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Nakanishi SC, Soares LB, Biazi LE, Nascimento VM, Costa AC, Rocha GJM, Ienczak JL. Fermentation strategy for second generation ethanol production from sugarcane bagasse hydrolyzate bySpathaspora passalidarumandScheffersomyces stipitis. Biotechnol Bioeng 2017. [DOI: 10.1002/bit.26357] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Simone C. Nakanishi
- Departamento de Biotecnologia, Escola de Engenharia de Lorena-USP; Estrada Municipal do Campinho; s/n, Lorena, SP CEP: 12602-810 Lorena SP Brasil
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE); Centro Nacional de Pesquisa em Energia e Materiais (CNPEM); Campinas SP Brasil
| | - Lauren B. Soares
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE); Centro Nacional de Pesquisa em Energia e Materiais (CNPEM); Campinas SP Brasil
| | - Luiz Eduardo Biazi
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE); Centro Nacional de Pesquisa em Energia e Materiais (CNPEM); Campinas SP Brasil
- Faculdade de Engenharia Química, UNICAMP; Cidade Universitária Zeferino Vaz Av. Albert Einstein; Campinas SP Brasil
| | - Viviane M. Nascimento
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE); Centro Nacional de Pesquisa em Energia e Materiais (CNPEM); Campinas SP Brasil
| | - Aline C. Costa
- Faculdade de Engenharia Química, UNICAMP; Cidade Universitária Zeferino Vaz Av. Albert Einstein; Campinas SP Brasil
| | - George Jackson M. Rocha
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE); Centro Nacional de Pesquisa em Energia e Materiais (CNPEM); Campinas SP Brasil
| | - Jaciane L. Ienczak
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE); Centro Nacional de Pesquisa em Energia e Materiais (CNPEM); Campinas SP Brasil
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Li QM, Shi Z, Xiong XY, Wen Q, Hu QL, Su XJ. Ethanol production from xylose by Fusarium oxysporum and the optimization of culture conditions. BIOCATAL BIOTRANSFOR 2016. [DOI: 10.1080/10242422.2016.1212848] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Qing-ming Li
- College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan, PR China,
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha, Hunan, PR China,
| | - Zhuo Shi
- College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan, PR China,
| | - Xing-yao Xiong
- The Institute of Vegetables and Flowers, Chinese Academy of Agriculture Sciences, Beijing, PR China, and
| | - Qian Wen
- College of Food Science and Technology, Hunan Agricultural University, Changsha, Hunan, PR China,
| | - Qiu-long Hu
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha, Hunan, PR China,
| | - Xiao-jun Su
- Hunan Provincial Key Laboratory of Crop Germplasm Innovation and Utilization, Hunan Agricultural University, Changsha, Hunan, PR China,
- Hunan Collaborative Innovation for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, Hunan, PR China
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Evaluation of Mediterranean Agricultural Residues as a Potential Feedstock for the Production of Biogas via Anaerobic Fermentation. BIOMED RESEARCH INTERNATIONAL 2015; 2015:171635. [PMID: 26609521 PMCID: PMC4644818 DOI: 10.1155/2015/171635] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 09/20/2015] [Accepted: 10/18/2015] [Indexed: 11/17/2022]
Abstract
Hydrothermal, dilute acid, and steam explosion pretreatment methods, were evaluated for their efficiency to improve the methane production yield of three Mediterranean agricultural lignocellulosic residues such as olive tree pruning, grapevine pruning, and almond shells. Hydrothermal and dilute acid pretreatments provided low to moderate increase in the digestibility of the biomass samples, whereas steam explosion enabled the highest methane yields to be achieved for almond shells at 232.2 ± 13.0 mL CH4/gVS and olive pruning at 315.4 ± 0.0 mL CH4/gVS. Introduction of an enzymatic prehydrolysis step moderately improved methane yields for hydrothermal and dilute acid pretreated samples but not for the steam exploded ones.
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Zhao ZM, Wang L, Chen HZ. A novel steam explosion sterilization improving solid-state fermentation performance. BIORESOURCE TECHNOLOGY 2015; 192:547-555. [PMID: 26092067 DOI: 10.1016/j.biortech.2015.05.099] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 05/29/2015] [Accepted: 05/30/2015] [Indexed: 06/04/2023]
Abstract
Traditional sterilization of solid medium (SM) requires lengthy time, degrades nutrients, and even sterilizes inadequately compared with that of liquid medium due to its low thermal conductivity. A novel sterilization strategy, high-temperature and short-time steam explosion (SE), was exploited for SM sterilization in this study. Results showed that SE conditions for complete sterilization were 172 °C for 2 min and 128 °C for 5 min. Glucose and xylose contents in medium after SE sterilization increased by 157% and 93% respectively compared with those after conventional sterilization (121 °C, 20 min) while fermentation inhibitors were not detected. FTIR spectra revealed that the mild SE conditions helped to release monosaccharides from the polysaccharides. Bacillus subtilis fermentation productivity on medium after SE sterilization was 3.83 times of that after conventional sterilization. Therefore, SE shortened sterilization time and improved SM nutrition, which facilitated fermentability of SM and should promote economy of solid-state fermentation.
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Affiliation(s)
- Zhi-Min Zhao
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
| | - Lan Wang
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China.
| | - Hong-Zhang Chen
- State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
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Silva-Fernandes T, Duarte LC, Carvalheiro F, Loureiro-Dias MC, Fonseca C, Gírio F. Hydrothermal pretreatment of several lignocellulosic mixtures containing wheat straw and two hardwood residues available in Southern Europe. BIORESOURCE TECHNOLOGY 2015; 183:213-220. [PMID: 25742753 DOI: 10.1016/j.biortech.2015.01.059] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 01/13/2015] [Accepted: 01/14/2015] [Indexed: 06/04/2023]
Abstract
This work studied the processing of biomass mixtures containing three lignocellulosic materials largely available in Southern Europe, eucalyptus residues (ER), wheat straw (WS) and olive tree pruning (OP). The mixtures were chemically characterized, and their pretreatment, by autohydrolysis, evaluated within a severity factor (logR0) ranging from 1.73 up to 4.24. A simple modeling strategy was used to optimize the autohydrolysis conditions based on the chemical characterization of the liquid fraction. The solid fraction was characterized to quantify the polysaccharide and lignin content. The pretreatment conditions for maximal saccharides recovery in the liquid fraction were at a severity range (logR0) of 3.65-3.72, independently of the mixture tested, which suggests that autohydrolysis can effectively process mixtures of lignocellulosic materials for further biochemical conversion processes.
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Affiliation(s)
- Talita Silva-Fernandes
- Laboratório Nacional de Energia e Geologia, I.P. (LNEG), Unidade de Bioenergia, Estrada do Paço do Lumiar 22, 1649-038 Lisboa, Portugal; Instituto Superior de Agronomia (ISA), Universidade de Lisboa, Linking Landscape, Environment, Agriculture and Food (LEAF), Tapada da Ajuda, 1349-017 Lisboa, Portugal
| | - Luís Chorão Duarte
- Laboratório Nacional de Energia e Geologia, I.P. (LNEG), Unidade de Bioenergia, Estrada do Paço do Lumiar 22, 1649-038 Lisboa, Portugal
| | - Florbela Carvalheiro
- Laboratório Nacional de Energia e Geologia, I.P. (LNEG), Unidade de Bioenergia, Estrada do Paço do Lumiar 22, 1649-038 Lisboa, Portugal
| | - Maria Conceição Loureiro-Dias
- Instituto Superior de Agronomia (ISA), Universidade de Lisboa, Linking Landscape, Environment, Agriculture and Food (LEAF), Tapada da Ajuda, 1349-017 Lisboa, Portugal
| | - César Fonseca
- Laboratório Nacional de Energia e Geologia, I.P. (LNEG), Unidade de Bioenergia, Estrada do Paço do Lumiar 22, 1649-038 Lisboa, Portugal.
| | - Francisco Gírio
- Laboratório Nacional de Energia e Geologia, I.P. (LNEG), Unidade de Bioenergia, Estrada do Paço do Lumiar 22, 1649-038 Lisboa, Portugal
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Optimizing Ethanol and Methane Production from Steam-pretreated, Phosphoric Acid-impregnated Corn Stover. Appl Biochem Biotechnol 2014; 175:1371-88. [DOI: 10.1007/s12010-014-1358-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2014] [Accepted: 11/07/2014] [Indexed: 10/24/2022]
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Romero-García JM, Niño L, Martínez-Patiño C, Álvarez C, Castro E, Negro MJ. Biorefinery based on olive biomass. State of the art and future trends. BIORESOURCE TECHNOLOGY 2014; 159:421-32. [PMID: 24713236 DOI: 10.1016/j.biortech.2014.03.062] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 03/11/2014] [Accepted: 03/14/2014] [Indexed: 05/08/2023]
Abstract
With currently more than nine million hectares, olive tree cultivation has spread worldwide, table olives and olive oil as the main products. Moreover, a number of by-products and residues derived from both tree cultivation and the process of industrial olive oil production, most having no practical applications, are obtained yearly. This paper reviews the research regarding these by-products, namely biomass from olive tree pruning, olive stones, olive pomace and wastewaters obtained from the process of olive oil production. Furthermore, a wide range of compounds has been identified and can be produced using a broad definition of the term biorefinery based on olive tree biomass. As an example, this paper reviews ethanol production as one of the main proposed applications, as well as research on other value-added products. Finally, this paper also assesses recent technological advances, future perspectives and challenges in each stage of the process.
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Affiliation(s)
- J M Romero-García
- Dept. Chemical, Environmental and Materials Engineering, Agrifood Campus of International Excellence, ceiA3, University of Jaén, 23071 Jaén, Spain
| | - L Niño
- Dept. Chemical, Environmental and Materials Engineering, Agrifood Campus of International Excellence, ceiA3, University of Jaén, 23071 Jaén, Spain
| | - C Martínez-Patiño
- Dept. Chemical, Environmental and Materials Engineering, Agrifood Campus of International Excellence, ceiA3, University of Jaén, 23071 Jaén, Spain
| | - C Álvarez
- Biofuels Unit, Energy Department-CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain
| | - E Castro
- Dept. Chemical, Environmental and Materials Engineering, Agrifood Campus of International Excellence, ceiA3, University of Jaén, 23071 Jaén, Spain
| | - M J Negro
- Biofuels Unit, Energy Department-CIEMAT, Avda. Complutense 40, 28040 Madrid, Spain.
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