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Sainte-Marie J, Barrandon M, Saint-André L, Gelhaye E, Martin F, Derrien D. C-STABILITY an innovative modeling framework to leverage the continuous representation of organic matter. Nat Commun 2021; 12:810. [PMID: 33547289 PMCID: PMC7864906 DOI: 10.1038/s41467-021-21079-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 01/11/2021] [Indexed: 01/30/2023] Open
Abstract
The understanding of soil organic matter (SOM) dynamics has considerably advanced in recent years. It was previously assumed that most SOM consisted of recalcitrant compounds, whereas the emerging view considers SOM as a range of polymers continuously processed into smaller molecules by decomposer enzymes. Mainstreaming this new paradigm in current models is challenging because of their ill-adapted framework. We propose the C-STABILITY model to resolve this issue. Its innovative framework combines compartmental and continuous modeling approaches to accurately reproduce SOM cycling processes. C-STABILITY emphasizes the influence of substrate accessibility on SOM turnover and makes enzymatic and microbial biotransformations of substrate explicit. Theoretical simulations provide new insights on how depolymerization and decomposers ecology impact organic matter chemistry and amount during decomposition and at steady state. The flexible mathematical structure of C-STABILITY offers a promising foundation for exploring new mechanistic hypotheses and supporting the design of future experiments.
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Affiliation(s)
- Julien Sainte-Marie
- grid.503480.aUniversité de Lorraine, AgroParisTech, INRAE, SILVA, F-54000 Nancy, France ,INRAE, BEF, F-54000 Nancy, France
| | - Matthieu Barrandon
- grid.29172.3f0000 0001 2194 6418Université de Lorraine, CNRS, IECL, F-54000 Nancy, France
| | | | - Eric Gelhaye
- grid.503276.50000 0004 1763 486XUniversité de Lorraine, INRAE, IAM, F-54000 Nancy, France
| | - Francis Martin
- grid.503276.50000 0004 1763 486XUniversité de Lorraine, INRAE, IAM, F-54000 Nancy, France ,grid.66741.320000 0001 1456 856XBeijing Advanced Innovation Center for Tree Breeding by Molecular Design, Beijing Forestry University, Beijing, China
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Abdou Alio M, Tugui OC, Rusu L, Pons A, Vial C. Hydrolysis and fermentation steps of a pretreated sawmill mixed feedstock for bioethanol production in a wood biorefinery. BIORESOURCE TECHNOLOGY 2020; 310:123412. [PMID: 32361645 DOI: 10.1016/j.biortech.2020.123412] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/15/2020] [Accepted: 04/16/2020] [Indexed: 06/11/2023]
Abstract
The aim of this work was to demonstrate the feasibility of second-generation bioethanol production using for the first time a sawmill mixed feedstock comprising four softwood species, representative of biomass resource in Auvergne-Rhône-Alpes region (France). The feedstock was subjected to a microwave-assisted water/ethanol Organosolv pretreatment. The investigation focused on enzymatic hydrolysis of this pretreated sawmill feedstock (PSF) using Cellic® Ctec2 as the enzyme, followed by fermentation of the resulting sugar solution using Saccharomyces cerevisiae strain. The cellulose-rich PSF with 71% w/w cellulose content presented high saccharification yields (up to 80%), which made it perfect for subsequent fermentation; this yield was predicted vs. time up to 5.2% w/v PSF loading using a mathematical model fitted only on data at 1.5%. Finally, high PSF loading (7.5%) and scaleup were shown to impair the saccharification yield, but alcoholic fermentation could still be carried out up to 80% of the theoretical glucose-to-ethanol conversion yield.
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Affiliation(s)
- Maarouf Abdou Alio
- Université Clermont Auvergne, CNRS, Sigma Clermont, Institut Pascal, F-63000 Clermont-Ferrand, France
| | - Oana-Cristina Tugui
- University "Vasile Alecsandri" of Bacău, Faculty of Engineering, Chemical and Food Engineering Department, Bacău, Romania
| | - Lacramioara Rusu
- University "Vasile Alecsandri" of Bacău, Faculty of Engineering, Chemical and Food Engineering Department, Bacău, Romania
| | - Agnès Pons
- Université Clermont Auvergne, CNRS, Sigma Clermont, Institut Pascal, F-63000 Clermont-Ferrand, France
| | - Christophe Vial
- Université Clermont Auvergne, CNRS, Sigma Clermont, Institut Pascal, F-63000 Clermont-Ferrand, France.
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Ahamed F, Song HS, Ooi CW, Ho YK. Modelling heterogeneity in cellulose properties predicts the slowdown phenomenon during enzymatic hydrolysis. Chem Eng Sci 2019. [DOI: 10.1016/j.ces.2019.05.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Towards improved predictions for the enzymatic chain-end scission of natural polymers by population balances: The need for a non-classical rate kernel. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2017.10.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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5
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Gaikwad A. Interactions of mixing and reaction kinetics of depolymerization of cellulose to renewable fuels. CHEM ENG COMMUN 2017. [DOI: 10.1080/00986445.2017.1371015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Ashwin Gaikwad
- Department of Chemical Engineering, Visvesvaraya National Institute of Technology, Nagpur, India
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Ho YK, Doshi P, Yeoh HK. Modelling simultaneous chain-end and random scissions using the fixed pivot technique. CAN J CHEM ENG 2017. [DOI: 10.1002/cjce.22957] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yong Kuen Ho
- Chemical Engineering Discipline, School of Engineering; Monash University Malaysia; Jalan Lagoon Selatan, Bandar Sunway, 47500 Selangor Malaysia
- Monash-Industry Palm Oil Education and Research Hub; Monash University Malaysia; Jalan Lagoon Selatan, Bandar Sunway, 47500 Selangor Malaysia
| | - Pankaj Doshi
- Pfizer, Inc.; Eastern Point Road, Groton, Connecticut 06340 USA
| | - Hak Koon Yeoh
- Seri Kembangan Engineering Sdn. Bhd., 26-28, Jalan Anggerik Vanilla W; Kota Kemuning, 40460 Shah Alam, Selangor Malaysia
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Jeoh T, Cardona MJ, Karuna N, Mudinoor AR, Nill J. Mechanistic kinetic models of enzymatic cellulose hydrolysis-A review. Biotechnol Bioeng 2017; 114:1369-1385. [PMID: 28244589 DOI: 10.1002/bit.26277] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 02/10/2017] [Accepted: 02/22/2017] [Indexed: 01/05/2023]
Abstract
Bioconversion of lignocellulose forms the basis for renewable, advanced biofuels, and bioproducts. Mechanisms of hydrolysis of cellulose by cellulases have been actively studied for nearly 70 years with significant gains in understanding of the cellulolytic enzymes. Yet, a full mechanistic understanding of the hydrolysis reaction has been elusive. We present a review to highlight new insights gained since the most recent comprehensive review of cellulose hydrolysis kinetic models by Bansal et al. (2009) Biotechnol Adv 27:833-848. Recent models have taken a two-pronged approach to tackle the challenge of modeling the complex heterogeneous reaction-an enzyme-centric modeling approach centered on the molecularity of the cellulase-cellulose interactions to examine rate limiting elementary steps and a substrate-centric modeling approach aimed at capturing the limiting property of the insoluble cellulose substrate. Collectively, modeling results suggest that at the molecular-scale, how rapidly cellulases can bind productively (complexation) and release from cellulose (decomplexation) is limiting, while the overall hydrolysis rate is largely insensitive to the catalytic rate constant. The surface area of the insoluble substrate and the degrees of polymerization of the cellulose molecules in the reaction both limit initial hydrolysis rates only. Neither enzyme-centric models nor substrate-centric models can consistently capture hydrolysis time course at extended reaction times. Thus, questions of the true reaction limiting factors at extended reaction times and the role of complexation and decomplexation in rate limitation remain unresolved. Biotechnol. Bioeng. 2017;114: 1369-1385. © 2017 Wiley Periodicals, Inc.
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Affiliation(s)
- Tina Jeoh
- Biological and Agricultural Engineering, University of California, Davis, California
| | - Maria J Cardona
- Chemical Engineering, University of California, Davis, California.,Intel Corporation, Hillsboro, Oregon
| | - Nardrapee Karuna
- Biological and Agricultural Engineering, University of California, Davis, California.,Department of Biotechnology, Faculty of Engineering and Industrial Technology, Silpakorn University, Nakhon Pathom, Thailand
| | - Akshata R Mudinoor
- Biological and Agricultural Engineering, University of California, Davis, California
| | - Jennifer Nill
- Chemical Engineering, University of California, Davis, California
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Tervasmäki P, Sotaniemi V, Kangas J, Taskila S, Ojamo H, Tanskanen J. A discretized model for enzymatic hydrolysis of cellulose in a fed-batch process. BIORESOURCE TECHNOLOGY 2017; 227:112-124. [PMID: 28013127 DOI: 10.1016/j.biortech.2016.12.054] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2016] [Revised: 12/12/2016] [Accepted: 12/14/2016] [Indexed: 05/24/2023]
Abstract
In the enzymatic hydrolysis of cellulose, several phenomena have been proposed to cause a decrease in the reaction rate with increasing conversion. The importance of each phenomenon is difficult to distinguish from batch hydrolysis data. Thus, kinetic models for the enzymatic hydrolysis of cellulose often suffer from poor parameter identifiability. This work presents a model that is applicable to fed-batch hydrolysis by discretizing the substrate based on the feeding time. Different scenarios are tested to explain the observed decrease in reaction rate with increasing conversion, and comprehensive assessment of the parameter sensitivities is carried out. The proposed model performed well in the broad range of experimental conditions used in this study and when compared to literature data. Furthermore, the use of data from fed-batch experiments and discretization of the model substrate to populations was found to be very informative when assessing the importance of the rate-decreasing phenomena in the model.
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Affiliation(s)
- Petri Tervasmäki
- Chemical Process Engineering, Faculty of Technology, University of Oulu, P.O. Box 4300, FI-90014 Oulun yliopisto, Finland.
| | - Ville Sotaniemi
- Chemical Process Engineering, Faculty of Technology, University of Oulu, P.O. Box 4300, FI-90014 Oulun yliopisto, Finland
| | - Jani Kangas
- Chemical Process Engineering, Faculty of Technology, University of Oulu, P.O. Box 4300, FI-90014 Oulun yliopisto, Finland
| | - Sanna Taskila
- Chemical Process Engineering, Faculty of Technology, University of Oulu, P.O. Box 4300, FI-90014 Oulun yliopisto, Finland
| | - Heikki Ojamo
- Department of Biotechnology and Chemical Technology, School of Chemical Technology, Aalto University, P.O. Box 16100, 00076, Aalto, Finland
| | - Juha Tanskanen
- Chemical Process Engineering, Faculty of Technology, University of Oulu, P.O. Box 4300, FI-90014 Oulun yliopisto, Finland
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Lebaz N, Cockx A, Spérandio M, Liné A, Morchain J. Application of the Direct Quadrature Method of Moments for the modelling of the enzymatic hydrolysis of cellulose: I. Case of soluble substrate. Chem Eng Sci 2016. [DOI: 10.1016/j.ces.2016.04.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Reconstruction of a distribution from a finite number of its moments: A comparative study in the case of depolymerization process. Comput Chem Eng 2016. [DOI: 10.1016/j.compchemeng.2015.09.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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