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Michelin M, Ximenes E, M Polizeli MDLT, Ladisch MR. Inhibition of enzyme hydrolysis of cellulose by phenols from hydrothermally pretreated sugarcane straw. Enzyme Microb Technol 2023; 166:110227. [PMID: 36931149 DOI: 10.1016/j.enzmictec.2023.110227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/22/2023] [Accepted: 03/07/2023] [Indexed: 03/11/2023]
Abstract
Relatively few studies have addressed the characterization of sugarcane straw (SCS) for production of fermentable sugars through enzyme hydrolysis. Straw is a major co-product of the sugarcane harvest in Brazil that has potential to sustainably increase cellulosic feedstocks in Brazil by 50%. Pretreatment of 10% w/v straw with liquid hot water (LHW) at 180 °C for 50 min (severity, So, of 4.05), solubilizes hemicellulose, preserves glucan, and generates 4.49 g/L soluble phenolic compounds in the resulting liquid. Extracts from washing pretreated solids with excess hot water followed by acetone resulted in 1.10 and 0.83 g/L phenolics, respectively. Acetone-derived extracts were more inhibitory and decreased glucose yield for enzyme hydrolysis of Solka Floc (a lignin-free cellulose) by 42%. In comparison, pretreated straw washed with hot water or acetone was readily hydrolyzed to 92% and 97% by cellulase enzyme. Hydrothermally treated SCS has the potential to provide a valuable and added source of fermentable sugars suitable for bioprocessing into biofuels and bioproducts when cellulase enzyme inhibitors are removed after pretreatment.
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Affiliation(s)
- Michele Michelin
- Laboratory of Renewable Resources Engineering, Department of Agricultural and Biological Engineering, Purdue University, West Lafayette, IN 47907-2032, USA; Departamento de Biologia, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-901, Brazil; Centre of Biological Engineering, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal
| | - Eduardo Ximenes
- Department of Environment and Occupational Health, School of Public Health, Innovation Center, Indiana University, Bloomington, IN 47408, USA
| | - Maria de Lourdes T M Polizeli
- Departamento de Biologia, Faculdade de Filosofia Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP 14040-901, Brazil
| | - Michael R Ladisch
- Laboratory of Renewable Resources Engineering, Department of Agricultural and Biological Engineering, Purdue University, West Lafayette, IN 47907-2032, USA.
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2
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Vilms Pedersen S, Brewer JR, Hedegaard MAB, Arnspang Christensen E. Spectral Unmixing for Label-Free, In-Liquid Characterization of Biomass Microstructure and Biopolymer Content by Coherent Raman Imaging. Anal Chem 2023; 95:2168-2175. [PMID: 36638088 DOI: 10.1021/acs.analchem.2c02349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Characterization of lignocellulosic biomass microstructure with chemical specificity and under physiological conditions could provide invaluable insights to our understanding of plant tissue development, microstructure, origins of recalcitrance, degradation, and solubilization. However, most methods currently available are either destructive, are not compatible with hosting a physiological environment, or introduces exogenous probes, complicating their use for studying changes in microstructure and mechanisms of plant development, recalcitrance, or degradation in situ. To address these challenges, we here present a multi-modal chemically specific imaging technique based on coherent anti-Stokes Raman scattering (CARS) microspectroscopy with simplex maximization and entropy-based spectral unmixing enabling label-free, chemically specific characterization of plant microstructure in liquid. We describe how spatial drift of samples suspended in liquid can introduce artifacts in spectral unmixing procedures for single-frequency CARS and propose a mitigative strategy toward these effects using simultaneously acquired forward-scattered CARS signals and epi-detected autofluorescence. We further apply the technique for chemical and microstructural characterization of untreated and liquid hot water pretreated rapeseed straw by CARS and show how the framework can be extended for 3D imaging with chemical specificity. Finally, we provide examples of the intricate chemical and microstructural details recovered by this hybrid imaging technique, including discerning between primary and secondary cell walls, localization of aqueous components to cell lumina, and the presence of funnel-type pits in samples ofBrassica napus.
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Affiliation(s)
- Simon Vilms Pedersen
- Department of Green Technology, SDU Biotechnology, University of Southern Denmark, Odense 5230, Denmark
| | - Jonathan R Brewer
- Department of Biochemistry and Molecular Biology, University of Southern Denmark, Odense 5230, Denmark
| | - Martin A B Hedegaard
- Department of Green Technology, SDU Biotechnology, University of Southern Denmark, Odense 5230, Denmark
| | - Eva Arnspang Christensen
- Department of Green Technology, SDU Biotechnology, University of Southern Denmark, Odense 5230, Denmark
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3
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Honarmandrad Z, Kucharska K, Gębicki J. Processing of Biomass Prior to Hydrogen Fermentation and Post-Fermentative Broth Management. Molecules 2022; 27:7658. [PMID: 36364485 PMCID: PMC9658980 DOI: 10.3390/molecules27217658] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/02/2022] [Accepted: 11/04/2022] [Indexed: 09/10/2023] Open
Abstract
Using bioconversion and simultaneous value-added product generation requires purification of the gaseous and the liquid streams before, during, and after the bioconversion process. The effect of diversified process parameters on the efficiency of biohydrogen generation via biological processes is a broad object of research. Biomass-based raw materials are often applied in investigations regarding biohydrogen generation using dark fermentation and photo fermentation microorganisms. The literature lacks information regarding model mixtures of lignocellulose and starch-based biomass, while the research is carried out based on a single type of raw material. The utilization of lignocellulosic and starch biomasses as the substrates for bioconversion processes requires the decomposition of lignocellulosic polymers into hexoses and pentoses. Among the components of lignocelluloses, mainly lignin is responsible for biomass recalcitrance. The natural carbohydrate-lignin shields must be disrupted to enable lignin removal before biomass hydrolysis and fermentation. The matrix of chemical compounds resulting from this kind of pretreatment may significantly affect the efficiency of biotransformation processes. Therefore, the actual state of knowledge on the factors affecting the culture of dark fermentation and photo fermentation microorganisms and their adaptation to fermentation of hydrolysates obtained from biomass requires to be monitored and a state of the art regarding this topic shall become a contribution to the field of bioconversion processes and the management of liquid streams after fermentation. The future research direction should be recognized as striving to simplification of the procedure, applying the assumptions of the circular economy and the responsible generation of liquid and gas streams that can be used and purified without large energy expenditure. The optimization of pre-treatment steps is crucial for the latter stages of the procedure.
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Affiliation(s)
| | - Karolina Kucharska
- Department of Process Engineering and Chemical Technology, Faculty of Chemistry, Gdansk University of Technology, 11/12 Gabriela Narutowicza Street, 80-233 Gdansk, Poland
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4
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Bhar R, Tiwari BR, Sarmah AK, Brar SK, Dubey BK. A comparative life cycle assessment of different pyrolysis-pretreatment pathways of wood biomass for levoglucosan production. BIORESOURCE TECHNOLOGY 2022; 356:127305. [PMID: 35562026 DOI: 10.1016/j.biortech.2022.127305] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 05/08/2022] [Accepted: 05/09/2022] [Indexed: 06/15/2023]
Abstract
In order to identify the most environmental-friendly pretreatment for pyrolsis of wood residue to levoglucosan (LG), for the first time a comparative life cycle assessment (LCA) was carried out for hot water treatment (HWT), torrefaction, acid pretreatment (AP) and salt pretreatment (SP) pathways. Since LG production can facilitate both resource recovery (RR) and wood residue handling (WRH), two different functional units (FUs), i.e., 1 kg LG production and 1 kg wood residue handling were considered. AP was found to generate the least global warming potential of 134.60 kg CO2-eq and human carcinogenic toxicity of 0.59 kg 1,4-dichlorobenzene-eq. for RR perspective. However, for WRH perspective, HWT was found to be the best pretreatment (6.39 kg CO2-eq; 0.03 kg 1,4-dichlorobenzene-eq.). Sensitivity analysis revealed that a reduction in electricity consumption by 15% could reduce the overall impacts by 14.00-14.82 %. This study also highlights the impact of goal and FU selection on LCA.
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Affiliation(s)
- Rajarshi Bhar
- Department of Civil Engineering, Indian Institute of Technology Kharagpur, West Bengal 721302, India
| | - Bikash R Tiwari
- Institut national de la recherche scientifique - Centre Eau Terre Environnement, Université du Québec, Quebec City G1K9A9, Canada
| | - Ajit K Sarmah
- Department of Civil and Environmental Engineering, University of Auckland, Auckland 1142, New Zealand
| | - Satinder K Brar
- Department of Civil Engineering, Lassonde School of Engineering, York University, North York, Toronto M3J1P3, Canada
| | - Brajesh K Dubey
- Department of Civil Engineering, Indian Institute of Technology Kharagpur, West Bengal 721302, India.
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5
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Koul B, Yakoob M, Shah MP. Agricultural waste management strategies for environmental sustainability. ENVIRONMENTAL RESEARCH 2022; 206:112285. [PMID: 34710442 DOI: 10.1016/j.envres.2021.112285] [Citation(s) in RCA: 83] [Impact Index Per Article: 41.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 09/09/2021] [Accepted: 10/18/2021] [Indexed: 05/27/2023]
Abstract
Globally, abundant agricultural wastes (AWs) are being generated each day to fulfil the increasing demands of the fast-growing population. The limited and/or improper management of the same has created an urgent need to devise strategies for their timely utilization and valorisation, for agricultural sustainability and human-food and health security. The AWs are generated from different sources including crop residue, agro-industries, livestock, and aquaculture. The main component of the crop residue and agro-industrial waste is cellulose, (the most abundant biopolymer), followed by lignin and hemicellulose (lignocellulosic biomass). The AWs and their processing are a global issue since its vast majority is currently burned or buried in soil, causing pollution of air, water and global warming. Traditionally, some crop residues have been used in combustion, animal fodder, roof thatching, composting, soil mulching, matchsticks and paper production. But, lignocellulosic biomass can also serve as a sustainable source of biofuel (biodiesel, bioethanol, biogas, biohydrogen) and bioenergy in order to mitigate the fossil fuel shortage and climate change issues. Thus, valorisation of lignocellulosic residues has the potential to influence the bioeconomy by producing value-added products including biofertilizers, bio-bricks, bio-coal, bio-plastics, paper, biofuels, industrial enzymes, organic acids etc. This review encompasses circular bioeconomy based various AW management strategies, which involve 'reduction', 'reusing' and 'recycling' of AWs to boost sustainable agriculture and minimise environmental pollution.
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Affiliation(s)
- Bhupendra Koul
- School of Bioengineering and Biosciences, Department of Biotechnology, Lovely Professional University, Phagwara, 144411, Punjab, India.
| | - Mohammad Yakoob
- School of Bioengineering and Biosciences, Department of Biotechnology, Lovely Professional University, Phagwara, 144411, Punjab, India
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6
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Coprocessing Corn Germ Meal for Oil Recovery and Ethanol Production: A Process Model for Lipid-Producing Energy Crops. Processes (Basel) 2022. [DOI: 10.3390/pr10040661] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Efforts to engineer high-productivity crops to accumulate oils in their vegetative tissue present the possibility of expanding biodiesel production. However, processing the new crops for lipid recovery and ethanol production from cell wall saccharides is challenging and expensive. In a previous study using corn germ meal as a model substrate, we reported that liquid hot water (LHW) pretreatment enriched the lipid concentration by 2.2 to 4.2 fold. This study investigated combining oil recovery with ethanol production by extracting oil following LHW and simultaneous saccharification and co-fermentation (SSCF) of the biomass. Corn germ meal was again used to model the oil-bearing energy crops. Pretreated germ meal hydrolysate or solids (160 and 180 °C for 10 min) were fermented, and lipids were extracted from both the spent fermentation whole broth and fermentation solids, which were recovered by centrifugation and convective drying. Lipid contents in spent fermentation solids increased 3.7 to 5.7 fold compared to the beginning germ meal. The highest lipid yield achieved after fermentation was 36.0 mg lipid g−1 raw biomass; the maximum relative amount of triacylglycerol (TAG) was 50.9% of extracted oil. Although the fermentation step increased the lipid concentration of the recovered solids, it did not improve the lipid yields of pretreated biomass and detrimentally affected oil compositions by increasing the relative concentrations of free fatty acids.
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Chen WH, Nižetić S, Sirohi R, Huang Z, Luque R, M Papadopoulos A, Sakthivel R, Phuong Nguyen X, Tuan Hoang A. Liquid hot water as sustainable biomass pretreatment technique for bioenergy production: A review. BIORESOURCE TECHNOLOGY 2022; 344:126207. [PMID: 34715344 DOI: 10.1016/j.biortech.2021.126207] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 10/20/2021] [Accepted: 10/20/2021] [Indexed: 06/13/2023]
Abstract
In recent years, lignocellulosic biomass has emerged as one of the most versatile energy sources among the research community for the production of biofuels and value-added chemicals. However, biomass pretreatment plays an important role in reducing the recalcitrant properties of lignocellulose, leading to superior quality of target products in bioenergy production. Among existing pretreatment techniques, liquid hot water (LHW) pretreatment has several outstanding advantages compared to others including minimum formation of monomeric sugars, significant removal of hemicellulose, and positive environmental impacts; however, several constraints of LHW pretreatment should be clarified. This contribution aims to provide a comprehensive analysis of reaction mechanism, reactor characteristics, influencing factors, techno-economic aspects, challenges, and prospects for LHW-based biomass pretreatment. Generally, LHW pretreatment could be widely employed in bioenergy processing from biomass, but circular economy-based advanced pretreatment techniques should be further studied in the future to achieve maximum efficiency, and minimum cost and drawbacks.
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Affiliation(s)
- Wei-Hsin Chen
- Department of Aeronautics and Astronautics, National Cheng Kung University, Tainan 701, Taiwan; Research Center for Smart Sustainable Circular Economy, Tunghai University, Taichung 407, Taiwan
| | - Sandro Nižetić
- University of Split, FESB, Rudjera Boskovica 32, 21000 Split, Croatia
| | - Ranjna Sirohi
- Centre for Energy and Environmental Sustainability, Lucknow-226 029, Uttar Pradesh, India; Department of Chemical and Biological Engineering, Korea University, Seoul, Republic of Korea
| | - Zuohua Huang
- State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
| | - Rafael Luque
- Departamento de Química Orgánica, Universidad de Cordoba, Campus de Rabanales, Edificio Marie Curie, Ctra. Nnal. IV-A, Km. 396, E-14014 Cordoba, Spain; Peoples Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya Str., 117198 Moscow, Russia
| | - Agis M Papadopoulos
- Department of Mechanical Engineering, Aristotle University Thessaloniki, Greece
| | - R Sakthivel
- Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham, Coimbatore, India
| | - Xuan Phuong Nguyen
- PATET Research Group, Ho Chi Minh City University of Transport, Ho Chi Minh city, Vietnam
| | - Anh Tuan Hoang
- Institute of Engineering, Ho Chi Minh city University of Technology (HUTECH), Ho Chi Minh city, Vietnam.
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8
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Zhang F, Lan W, Zhang A, Liu C. Green approach to produce xylo-oligosaccharides and glucose by mechanical-hydrothermal pretreatment. BIORESOURCE TECHNOLOGY 2022; 344:126298. [PMID: 34748982 DOI: 10.1016/j.biortech.2021.126298] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/02/2021] [Accepted: 11/02/2021] [Indexed: 06/13/2023]
Abstract
A pretreatment method combining ball-milling, ultrasound, and hydrothermal treatment was developed to produce xylooligosaccharides (XOS) and glucose with a high yield from corn stover. Under optimal conditions, the yield of XOS reached 80.40%, and the functional XOS (X2-X4) took up to 26.97%. Small amount of inhibitors were formed during the hydrothermal process. Enzymatic hydrolysis of the hydrothermally pretreated residue gave 92.60% yield of glucose, leaving lignin as the final residue which accounted for 66.82% of native lignin. The correlations between the yield of glucose and the physio-chemical properties of corn stover, such as crystalline index, particle size, and the removal of xylan, were established to understand the recalcitrance removal during the pretreatment process. Results demonstrate that this combined pretreatment method is a green and effective process to selectively separate the hemicellulose fractions and improve both production of XOS and glucose yield.
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Affiliation(s)
- Fulong Zhang
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Wu Lan
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China
| | - Aiping Zhang
- College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
| | - Chuanfu Liu
- State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
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9
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Ruiz HA, Galbe M, Garrote G, Ramirez-Gutierrez DM, Ximenes E, Sun SN, Lachos-Perez D, Rodríguez-Jasso RM, Sun RC, Yang B, Ladisch MR. Severity factor kinetic model as a strategic parameter of hydrothermal processing (steam explosion and liquid hot water) for biomass fractionation under biorefinery concept. BIORESOURCE TECHNOLOGY 2021; 342:125961. [PMID: 34852440 DOI: 10.1016/j.biortech.2021.125961] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 09/12/2021] [Accepted: 09/14/2021] [Indexed: 06/13/2023]
Abstract
Hydrothermal processes are an attractive clean technology and cost-effective engineering platform for biorefineries based in the conversion of biomass to biofuels and high-value bioproducts under the basis of sustainability and circular bioeconomy. The deep and detailed knowledge of the structural changes by the severity of biomasses hydrothermal fractionation is scientifically and technological needed in order to improve processes effectiveness, reactors designs, and industrial application of the multi-scale target compounds obtained by steam explosion and liquid hot water systems. The concept of the severity factor [log10 (Ro)] established>30 years ago, continues to be a useful index that can provide a simple descriptor of the relationship between the operational conditions for biomass fractionation in second generation of biorefineries. This review develops a deep explanation of the hydrothermal severity factor based in lignocellulosic biomass fractionation with emphasis in research advances, pretreatment operations and the applications of severity factor kinetic model.
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Affiliation(s)
- Héctor A Ruiz
- Biorefinery Group, Food Research Department, Faculty of Chemistry Sciences, Autonomous University of Coahuila, Saltillo, Coahuila 25280, Mexico.
| | - Mats Galbe
- Department of Chemical Engineering, Lund University, P.O. Box 124, SE-22100 Lund, Sweden
| | - Gil Garrote
- Department of Chemical Engineering, Faculty of Science, Universidade de Vigo (Campus Ourense), As Lagoas, 32004 Ourense, Spain
| | - Diana M Ramirez-Gutierrez
- Laboratory of Renewable Resources Engineering, Purdue University, West Lafayette, IN 47907-2022, USA; Department of Agricultural and Biological Engineering, Purdue University, West Lafayette, IN 47907-2022, USA
| | - Eduardo Ximenes
- Laboratory of Renewable Resources Engineering, Purdue University, West Lafayette, IN 47907-2022, USA; Department of Agricultural and Biological Engineering, Purdue University, West Lafayette, IN 47907-2022, USA
| | - Shao-Ni Sun
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, Beijing 100083, PR China
| | - Daniel Lachos-Perez
- Department of Chemical Engineering, Federal University of Santa Maria, 1000, Roraima Avenue, Santa Maria, RS 97105-900, Brazil
| | - Rosa M Rodríguez-Jasso
- Biorefinery Group, Food Research Department, Faculty of Chemistry Sciences, Autonomous University of Coahuila, Saltillo, Coahuila 25280, Mexico
| | - Run-Cang Sun
- Liaoning Key Laboratory of Lignocellulose Chemistry and Biomaterials, College of Light Industry and Chemical Engineering, Dalian Polytechnic University, Dalian 116034, PR China
| | - Bin Yang
- Bioproducts Sciences and Engineering Laboratory, Department of Biological Systems Engineering, Washington State University, Richland, WA 99354, USA
| | - Michael R Ladisch
- Laboratory of Renewable Resources Engineering, Purdue University, West Lafayette, IN 47907-2022, USA; Department of Agricultural and Biological Engineering, Purdue University, West Lafayette, IN 47907-2022, USA
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Sun Q, Chen WJ, Pang B, Sun Z, Lam SS, Sonne C, Yuan TQ. Ultrastructural change in lignocellulosic biomass during hydrothermal pretreatment. BIORESOURCE TECHNOLOGY 2021; 341:125807. [PMID: 34474237 DOI: 10.1016/j.biortech.2021.125807] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Revised: 08/13/2021] [Accepted: 08/15/2021] [Indexed: 06/13/2023]
Abstract
In recent years, visualization and characterization of lignocellulose at different scales elucidate the modifications of its ultrastructural and chemical features during hydrothermal pretreatment which include degradation and dissolving of hemicelluloses, swelling and partial hydrolysis of cellulose, melting and redepositing a part of lignin in the surface. As a result, cell walls are swollen, deformed and de-laminated from the adjacent layer, lead to a range of revealed droplets that appear on and within cell walls. Moreover, the certain extent morphological changes significantly promote the downstream processing steps, especially for enzymatic hydrolysis and anaerobic fermentation to bioethanol by increasing the contact area with enzymes. However, the formation of pseudo-lignin hinders the accessibility of cellulase to cellulose, which decreases the efficiency of enzymatic hydrolysis. This review is intended to bridge the gap between the microstructure studies and value-added applications of lignocellulose while inspiring more research prospects to enhance the hydrothermal pretreatment process.
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Affiliation(s)
- Qian Sun
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, No.35 Tsinghua East Road, Beijing 100083, PR China
| | - Wei-Jing Chen
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, No.35 Tsinghua East Road, Beijing 100083, PR China
| | - Bo Pang
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, No.35 Tsinghua East Road, Beijing 100083, PR China
| | - Zhuohua Sun
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, No.35 Tsinghua East Road, Beijing 100083, PR China
| | - Su Shiung Lam
- Pyrolysis Technology Research Group, Institute of Tropical Aquaculture and Fisheries (Akuatrop), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Christian Sonne
- Department of Bioscience, Arctic Research Centre (ARC), Aarhus University, Frederiksborgvej 399, PO Box 358, DK-4000, Roskilde, Denmark
| | - Tong-Qi Yuan
- Beijing Key Laboratory of Lignocellulosic Chemistry, Beijing Forestry University, No.35 Tsinghua East Road, Beijing 100083, PR China.
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Ahmed B, Tyagi VK, Aboudi K, Naseem A, Álvarez-Gallego CJ, Fernández-Güelfo LA, Kazmi AA, Romero-García LI. Thermally enhanced solubilization and anaerobic digestion of organic fraction of municipal solid waste. CHEMOSPHERE 2021; 282:131136. [PMID: 34470172 DOI: 10.1016/j.chemosphere.2021.131136] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 06/02/2021] [Accepted: 06/03/2021] [Indexed: 06/13/2023]
Abstract
Organic fraction of municipal solid waste (OFMSW) is an ideal substrate for biogas production; however, complex chemical structure and being heterogeneous obstruct its biotransformation in anaerobic digestion (AD) process. Thermal pre-treatment of OFMSW has been suggested to enhance the solubilization and improve the anaerobic digestibility of OFMSW. This paper critically and comprehensively reviews the characterization of OFMSW (physical, chemical, bromatological) and enlightens the valuable properties of OFMSW for waste valorization. In following sections, the advantages and limitations of AD of OFMSW are discussed, followed by the application of temperature phased AD, and various thermal pre-treatments, i.e., conventional thermal, microwave, and thermo-chemical for high rate bioenergy transformation. Effects of pre-treatment on COD, proteins, sugars and VS solubilization, and biogas yield are discussed. Formation of recalcitrant during thermal pre-treatment and the effect on anaerobic digestibility are considered. Full scale application, and techno-economic and environmental feasibility of thermal pre-treatment methods are also revealed. This review concluded that thermophilic (55 °C) and temperature phased anaerobic digestion, temperature phased anaerobic digestion, TPAD (55 + 37 °C) processes shows effective and stable performance at low HRTs and high OLRs and achieved higher methane yield than mesophilic digestion. The thermal pre-treatment at a lower temperature (120 °C) improves the net energy yield. However, high-temperature pre-treatment (>150 °C) result in decreased biogas yield and even lower than the non-pre-treated OFMSW, although a high degree of COD solubilization. The OFMSW solubilization in terms of COD, proteins, and sugars cannot accurately reflect thermal/hybrid pre-treatments' potential. Thus, substrate pre-treatment followed by anaerobic digestibility of pretreated substrate together can evaluate the actual effectiveness of thermal pre-treatment of OFMSW.
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Affiliation(s)
- Banafsha Ahmed
- Environmental BioTechnology Group (EBiTG), Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
| | - Vinay Kumar Tyagi
- Environmental BioTechnology Group (EBiTG), Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India.
| | - Kaoutar Aboudi
- Department of Chemical Engineering and Food Technology, Institute of Vitivinicultural and Agri-food Research (IVAGRO), University of Cadiz, 11510, Puerto Real, Cadiz, Spain
| | - Azmat Naseem
- Environmental BioTechnology Group (EBiTG), Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
| | - Carlos José Álvarez-Gallego
- Department of Chemical Engineering and Food Technology, Institute of Vitivinicultural and Agri-food Research (IVAGRO), University of Cadiz, 11510, Puerto Real, Cadiz, Spain
| | - Luis Alberto Fernández-Güelfo
- Department of Environmental Technologies, Faculty of Marine and Environmental Sciences, International Campus of Excellence (ceiA3), University of Cadiz, 11510, Puerto Real, Cadiz, Spain
| | - A A Kazmi
- Environmental BioTechnology Group (EBiTG), Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
| | - Luis Isidoro Romero-García
- Department of Chemical Engineering and Food Technology, Institute of Vitivinicultural and Agri-food Research (IVAGRO), University of Cadiz, 11510, Puerto Real, Cadiz, Spain
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12
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Chemical composition and porcine in vitro digestibility of corn whole stillage pretreated with heat at various temperatures and times. Anim Feed Sci Technol 2021. [DOI: 10.1016/j.anifeedsci.2021.115041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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13
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Ghimire N, Bakke R, Bergland WH. Liquefaction of lignocellulosic biomass for methane production: A review. BIORESOURCE TECHNOLOGY 2021; 332:125068. [PMID: 33849751 DOI: 10.1016/j.biortech.2021.125068] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 03/21/2021] [Accepted: 03/23/2021] [Indexed: 06/12/2023]
Abstract
Hydrothermal pretreatment (HTP) (Hot water extraction (HWE) and steam pretreatment) and pyrolysis have the potential to liquefy lignocellulosic biomass. HTP produces hydrolysate, consisting mainly of solubilized hemicellulose, while pyrolysis produces aqueous pyrolysis liquid (APL). The liquid products, either as main products or by-product, can be used as anaerobic digestion (AD) feeds, overcoming shortcomings of solid-state AD (SS-AD). This paper reviews HWE, steam pretreatment, and pyrolysis pretreatment methods used to liquefy lignocellulosic biomass, AD of liquefied products, effects of inhibition from intermediate by-products such as furan and phenolic compounds, and pretreatment tuning to increase methane yield. HTP, focusing on methane production, produces less inhibitory compounds when carried out at moderate temperatures. APL is a challenging feed for AD due to its complexity, including various inhibitory substances. Pre-treatment of biomass before pyrolysis, adaptation of microorganism to inhibitors, and additives, such as biochar, may help the AD cultures cope with inhibitors in APL.
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Affiliation(s)
- Nirmal Ghimire
- Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, Kjølnes Ring 56, NO-3918 Porsgrunn, Norway.
| | - Rune Bakke
- Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, Kjølnes Ring 56, NO-3918 Porsgrunn, Norway
| | - Wenche Hennie Bergland
- Department of Process, Energy and Environmental Technology, University of South-Eastern Norway, Kjølnes Ring 56, NO-3918 Porsgrunn, Norway
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Li J, Liu F, Yu H, Li Y, Zhou S, Ai Y, Zhou X, Wang Y, Wang L, Peng L, Wang Y. Diverse Banana Pseudostems and Rachis Are Distinctive for Edible Carbohydrates and Lignocellulose Saccharification towards High Bioethanol Production under Chemical and Liquid Hot Water Pretreatments. Molecules 2021; 26:molecules26133870. [PMID: 34202856 PMCID: PMC8270323 DOI: 10.3390/molecules26133870] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 05/31/2021] [Accepted: 06/15/2021] [Indexed: 11/20/2022] Open
Abstract
Banana is a major fruit crop throughout the world with abundant lignocellulose in the pseudostem and rachis residues for biofuel production. In this study, we collected a total of 11 pseudostems and rachis samples that were originally derived from different genetic types and ecological locations of banana crops and then examined largely varied edible carbohydrates (soluble sugars, starch) and lignocellulose compositions. By performing chemical (H2SO4, NaOH) and liquid hot water (LHW) pretreatments, we also found a remarkable variation in biomass enzymatic saccharification and bioethanol production among all banana samples examined. Consequently, this study identified a desirable banana (Refen1, subgroup Pisang Awak) crop containing large amounts of edible carbohydrates and completely digestible lignocellulose, which could be combined to achieve the highest bioethanol yields of 31–38% (% dry matter), compared with previously reported ones in other bioenergy crops. Chemical analysis further indicated that the cellulose CrI and lignin G-monomer should be two major recalcitrant factors affecting biomass enzymatic saccharification in banana pseudostems and rachis. Therefore, this study not only examined rich edible carbohydrates for food in the banana pseudostems but also detected digestible lignocellulose for bioethanol production in rachis tissue, providing a strategy applicable for genetic breeding and biomass processing in banana crops.
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Affiliation(s)
- Jingyang Li
- Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (F.L.); (H.Y.); (S.Z.); (Y.A.); (X.Z.); (Y.W.); (L.W.); (L.P.)
- Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, China;
- Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou 570102, China
| | - Fei Liu
- Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (F.L.); (H.Y.); (S.Z.); (Y.A.); (X.Z.); (Y.W.); (L.W.); (L.P.)
- Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, China;
| | - Hua Yu
- Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (F.L.); (H.Y.); (S.Z.); (Y.A.); (X.Z.); (Y.W.); (L.W.); (L.P.)
- Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, China;
| | - Yuqi Li
- Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, China;
| | - Shiguang Zhou
- Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (F.L.); (H.Y.); (S.Z.); (Y.A.); (X.Z.); (Y.W.); (L.W.); (L.P.)
- Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, China;
| | - Yuanhang Ai
- Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (F.L.); (H.Y.); (S.Z.); (Y.A.); (X.Z.); (Y.W.); (L.W.); (L.P.)
- Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, China;
| | - Xinyu Zhou
- Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (F.L.); (H.Y.); (S.Z.); (Y.A.); (X.Z.); (Y.W.); (L.W.); (L.P.)
- Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, China;
| | - Youmei Wang
- Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (F.L.); (H.Y.); (S.Z.); (Y.A.); (X.Z.); (Y.W.); (L.W.); (L.P.)
- Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, China;
| | - Lingqiang Wang
- Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (F.L.); (H.Y.); (S.Z.); (Y.A.); (X.Z.); (Y.W.); (L.W.); (L.P.)
- State Key Laboratory for Conservation & Utilization of Subtropical Agro-Bioresources, College of Agriculture, Guangxi University, Nanning 530000, China
| | - Liangcai Peng
- Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (F.L.); (H.Y.); (S.Z.); (Y.A.); (X.Z.); (Y.W.); (L.W.); (L.P.)
- Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, China;
| | - Yanting Wang
- Biomass & Bioenergy Research Centre, College of Plant Science & Technology, Huazhong Agricultural University, Wuhan 430070, China; (J.L.); (F.L.); (H.Y.); (S.Z.); (Y.A.); (X.Z.); (Y.W.); (L.W.); (L.P.)
- Laboratory of Biomass Engineering & Nanomaterial Application in Automobiles, College of Food Science & Chemical Engineering, Hubei University of Arts and Science, Xiangyang 441053, China;
- Correspondence:
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Shen X, Sun R. Recent advances in lignocellulose prior-fractionation for biomaterials, biochemicals, and bioenergy. Carbohydr Polym 2021; 261:117884. [PMID: 33766371 DOI: 10.1016/j.carbpol.2021.117884] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Revised: 01/25/2021] [Accepted: 02/26/2021] [Indexed: 12/20/2022]
Abstract
Due to over-consumption of fossil resources and environmental problems, lignocellulosic biomass as the most abundant and renewable materials is considered as the best candidate to produce biomaterials, biochemicals, and bioenergy, which is of strategic significance and meets the theme of Green Chemistry. Highly efficient and green fractionation of lignocellulose components significantly boosts the high-value utilization of lignocellulose and the biorefinery development. However, heterogeneity of lignocellulosic structure severely limited the lignocellulose fractionation. This paper offers the summary and perspective of the extensive investigation that aims to give insight into the lignocellulose prior-fractionation. Based on the role and structure of lignocellulose component in the plant cell wall, lignocellulose prior-fractionation can be divided into cellulose-first strategy, hemicelluloses-first strategy, and lignin-first strategy, which realizes the selective dissociation and transformation of a component in lignocellulose. Ultimately, the challenges and opportunities of lignocellulose prior-fractionation are proposed on account of the existing problems in the biorefining valorization.
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Affiliation(s)
- Xiaojun Shen
- Liaoning Key Laboratory of Lignocellulose Chemistry and BioMaterials, Dalian Polytechnic University, Dalian, 116034, China; State Key Laboratory of Catalysis (SKLC), Dalian National Laboratory for Clean Energy (DNL), Dalian, China
| | - Runcang Sun
- Liaoning Key Laboratory of Lignocellulose Chemistry and BioMaterials, Dalian Polytechnic University, Dalian, 116034, China.
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16
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Kang X, Wang YY, Wang S, Song X. Xylan and xylose decomposition during hot water pre-extraction: A pH-regulated hydrolysis. Carbohydr Polym 2021; 255:117391. [PMID: 33436220 DOI: 10.1016/j.carbpol.2020.117391] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 11/04/2020] [Accepted: 11/05/2020] [Indexed: 11/19/2022]
Abstract
One of the key issues in the development of biofuels using lignocellulosic feedstocks is to increase the yield of fermented sugar, and simultaneously decrease the generation of fermentation inhibitors. Therefore, it is essential to understand the degradation mechanism of xylan during hot-water pretreatment. We analyzed the hydrothermal degradation products of xylan and xylose under different conditions. Results showed that furfural and formic acid formed from xylose reached a maximum value of 32.56 % and 35.14 %, respectively. By increasing the initial pH of the xylan solution, the furfural concentration can be reduced effectively to 2% and the formation of formic acid was preferred under alkaline conditions. On this basis, we proposed a new hydrothermal degradation pathway of xylan in alkaline solution. The in-depth understanding of xlyan degradation during hot water pre-treatment will be beneficial for improving the efficiency of biofuel production.
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Affiliation(s)
- Xiheng Kang
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China
| | - Yun-Yan Wang
- Center for Renewable Carbon, Department of Forestry, Wildlife and Fisheries, University of Tennessee, Knoxville, TN, 37996, USA
| | - Shuangfei Wang
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China
| | - Xueping Song
- School of Light Industry and Food Engineering, Guangxi University, Nanning 530004, PR China; Guangxi Key Laboratory of Clean Pulp & Papermaking and Pollution Control, Nanning 530004, PR China; Center for Renewable Carbon, Department of Forestry, Wildlife and Fisheries, University of Tennessee, Knoxville, TN, 37996, USA.
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17
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Effect of microaeration on cell growth and glucose/xylose fermentation of Kluyveromyces marxianus from the imitate lignocellulosic-derived hydrolysate. Process Biochem 2021. [DOI: 10.1016/j.procbio.2020.11.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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18
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Adegboye MF, Ojuederie OB, Talia PM, Babalola OO. Bioprospecting of microbial strains for biofuel production: metabolic engineering, applications, and challenges. BIOTECHNOLOGY FOR BIOFUELS 2021; 14:5. [PMID: 33407786 PMCID: PMC7788794 DOI: 10.1186/s13068-020-01853-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 12/09/2020] [Indexed: 05/17/2023]
Abstract
The issues of global warming, coupled with fossil fuel depletion, have undoubtedly led to renewed interest in other sources of commercial fuels. The search for renewable fuels has motivated research into the biological degradation of lignocellulosic biomass feedstock to produce biofuels such as bioethanol, biodiesel, and biohydrogen. The model strain for biofuel production needs the capability to utilize a high amount of substrate, transportation of sugar through fast and deregulated pathways, ability to tolerate inhibitory compounds and end products, and increased metabolic fluxes to produce an improved fermentation product. Engineering microbes might be a great approach to produce biofuel from lignocellulosic biomass by exploiting metabolic pathways economically. Metabolic engineering is an advanced technology for the construction of highly effective microbial cell factories and a key component for the next-generation bioeconomy. It has been extensively used to redirect the biosynthetic pathway to produce desired products in several native or engineered hosts. A wide range of novel compounds has been manufactured through engineering metabolic pathways or endogenous metabolism optimizations by metabolic engineers. This review is focused on the potential utilization of engineered strains to produce biofuel and gives prospects for improvement in metabolic engineering for new strain development using advanced technologies.
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Affiliation(s)
- Mobolaji Felicia Adegboye
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, Private Bag X2046, 2735, South Africa
| | - Omena Bernard Ojuederie
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, Private Bag X2046, 2735, South Africa
- Department of Biological Sciences, Faculty of Science, Kings University, Ode-Omu, PMB 555, Osun State, Nigeria
| | - Paola M Talia
- Instituto de Agrobiotecnología y Biología Molecular (IABIMO), Instituto Nacional de Tecnología Agropecuaria (INTA CICVyA, CNIA, INTA Castelar, Dr. N. Repetto y Los Reseros s/n, (1686) Hurlingham, 1686) Hurlingham, Provincia de Buenos Aires, Argentina
- Consejo Nacional de Investigaciones Científicas Y Tecnológicas (CONICET), Buenos Aires, Provincia de Buenos Aires, Argentina
| | - Olubukola Oluranti Babalola
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho, Private Bag X2046, 2735, South Africa.
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19
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Juneja A, Noordam B, Pel H, Basu R, Appeldoorn M, Singh V. Optimization of two-stage pretreatment for maximizing ethanol production in 1.5G technology. BIORESOURCE TECHNOLOGY 2021; 320:124380. [PMID: 33217695 DOI: 10.1016/j.biortech.2020.124380] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 11/02/2020] [Accepted: 11/03/2020] [Indexed: 06/11/2023]
Abstract
Two-stage pretreatment conditions were optimized to convert corn fiber, separated from whole stillage in a corn dry grind ethanol plant, to fermentable sugars via hydrolysis. Liquid hot water pretreatment (25% solids) at 180 °C for 10 min, followed by three cycles of disk milling, provided maximum glucose, xylose, and arabinose yields of 88.5%, 41.0%, and 30.4% respectively after hydrolysis with Cellulase I. The glucose, xylose, and arabinose yields with Cellulase II at optimum conditions were 94.9%, 74.2%, and 66.3%, respectively. SSF of corn fiber using engineered yeast, with both Cellulase I and II, provided maximum ethanol concentrations of 2.13% and 2.73% (v/v). The protein content in the residual solid after fermentation was 47.95% and 52.05% for Cellulase I and II, respectively. This technology provides additional ethanol in a dry grind plant by converting corn fiber into ethanol and increases the protein content of DDGS, thereby improving the quality.
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Affiliation(s)
- Ankita Juneja
- Agricultural and Biological Engineering Department, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | | | - Herman Pel
- DSM Food Specialties, Delft, The Netherlands
| | - Rahul Basu
- DSM Bio-based Products & Services, Elgin, IL, USA
| | | | - Vijay Singh
- Agricultural and Biological Engineering Department, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
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20
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Chemical Free Two-Step Hydrothermal Pretreatment to Improve Sugar Yields from Energy Cane. ENERGIES 2020. [DOI: 10.3390/en13215805] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Energy cane is an attractive lignocellulosic feedstock for processing into biofuels and bioproducts. A low-severity two-step hydrothermal pretreatment was investigated on energy cane for the production of monomeric sugar. Pretreatment temperature and time, in addition to the effect of disk milling, were observed for the glucose and xylose yields during hydrolysis. At residence times above 5 min in case of pretreatment at 200 °C, all of the hemicellulose was observed to be solubilized. The pretreatment condition of 200 °C for 10 min with disk milling was observed to provide the highest glucose concentration of 5.4%, and 200 °C for 5 min with disk milling provided the highest xylose concentration of 2.15%. The effect of disk milling in improving the sugar concentrations during hydrolysis was significant, especially at lower pretreatment temperatures and times. Low xylose yields at higher temperatures were attributed to the formation of degradation products at increased severity.
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21
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High solids all-inclusive polysaccharide hydrolysis of steam-exploded corn pericarp by periodic peristalsis. Carbohydr Polym 2020; 246:116483. [PMID: 32747226 DOI: 10.1016/j.carbpol.2020.116483] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2020] [Revised: 05/19/2020] [Accepted: 05/19/2020] [Indexed: 11/20/2022]
Abstract
A new sequence of steam explosion (SE) with periodic peristalsis (PP) exploited to fractionate corn pericarp (CP), and its high solid cellulosic hydrolysis to increase sugar yield. In this investigation, the optimum SE-condition was 0.8 MPa/5 min., recovered around 12.62 % total sugars than untreated CP, whereas glucan and xylan digestibility reached around 97 % and 87 %, respectively. Besides that, the unground SECP conversion increased by 27.10 % glucan and 34.18 % xylan than the ground one. FE-SEM, FTIR, XRD results confirmed that SE significantly fractionated the amorphous substances that driven the increment of the crystallinity index. SE changed the functional groups without altering the lignin, and also the formation of degradations products was negligible and not detrimental to sugars conversion. An unpolluted SEPP enzymatic hydrolysis system at high solid loading (25 %) with compatible low cellulase dose (15 FPU g-1 solids) was beneficial to intensified sugars conversion.
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22
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Nagle NJ, Donohoe BS, Wolfrum EJ, Kuhn EM, Haas TJ, Ray AE, Wendt LM, Delwiche ME, Weiss ND, Radtke C. Chemical and Structural Changes in Corn Stover After Ensiling: Influence on Bioconversion. Front Bioeng Biotechnol 2020; 8:739. [PMID: 32923429 PMCID: PMC7457055 DOI: 10.3389/fbioe.2020.00739] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Accepted: 06/10/2020] [Indexed: 11/23/2022] Open
Abstract
Production of biofuels, bioproducts, and bioenergy requires a well-characterized, stable, and reasonably uniform biomass supply and well-established supply chains for shipping biomass from farm fields to biorefineries, while achieving year-round production targets. Preserving and stabilizing biomass feedstock during storage is a necessity for cost-effective and sustainable biofuel production. Ensiling is a common storage method used to preserve and even improve forage quality; however, the impact of ensiling on biomass physical and chemical properties that influence bioconversion processes has been variable. Our objective in this work was to determine the effects of ensiling on lignocellulosic feedstock physicochemical properties and how that influences bioconversion requirements. We observed statistically significant decreases (p < 0.05) in the content of two major structural carbohydrates (glucan and xylan) of 5 and 8%, respectively, between the ensiled and non-ensiled materials. We were unable to detect differences in sugar yields from structural carbohydrates after pretreatment and enzymatic hydrolysis of the ensiled materials compared to non-ensiled controls. Based on this work, we conclude that ensiling the corn stover did not change the bioconversion requirements compared to the control samples and incurred losses of structural carbohydrates. At the light microscopy level, ensiled corn stover exhibited little structural change or relocation of cell wall components as detected by immunocytochemistry. However, more subtle structural changes were revealed by electron microscopy, as ensiled cell walls exhibit ultrastructural characteristics such as wall delimitation intermediate between non-ensiled and dilute-acid-pretreated cell walls. These findings suggest that alternative methods of conversion, such as deacetylation and mechanical refining, could take advantage of lamellar defects and may be more effective than dilute acid or hot water pretreatment for biomass conversion of ensiled materials.
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Affiliation(s)
- Nick J Nagle
- National Renewable Energy Laboratory, Golden, CO, United States
| | - Bryon S Donohoe
- National Renewable Energy Laboratory, Golden, CO, United States
| | | | - Erik M Kuhn
- National Renewable Energy Laboratory, Golden, CO, United States
| | - Thomas J Haas
- National Renewable Energy Laboratory, Golden, CO, United States
| | - Allison E Ray
- Idaho National Laboratory, Idaho Falls, ID, United States
| | - Lynn M Wendt
- Idaho National Laboratory, Idaho Falls, ID, United States
| | | | - Noah D Weiss
- Department of Chemical Engineering, Lund University, Lund, Sweden
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Novel Routes in Transformation of Lignocellulosic Biomass to Furan Platform Chemicals: From Pretreatment to Enzyme Catalysis. Catalysts 2020. [DOI: 10.3390/catal10070743] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The constant depletion of fossil fuels along with the increasing need for novel materials, necessitate the development of alternative routes for polymer synthesis. Lignocellulosic biomass, the most abundant carbon source on the planet, can serve as a renewable starting material for the design of environmentally-friendly processes for the synthesis of polyesters, polyamides and other polymers with significant value. The present review provides an overview of the main processes that have been reported throughout the literature for the production of bio-based monomers from lignocellulose, focusing on physicochemical procedures and biocatalysis. An extensive description of all different stages for the production of furans is presented, starting from physicochemical pretreatment of biomass and biocatalytic decomposition to monomeric sugars, coupled with isomerization by enzymes prior to chemical dehydration by acid Lewis catalysts. A summary of all biotransformations of furans carried out by enzymes is also described, focusing on galactose, glyoxal and aryl-alcohol oxidases, monooxygenases and transaminases for the production of oxidized derivatives and amines. The increased interest in these products in polymer chemistry can lead to a redirection of biomass valorization from second generation biofuels to chemical synthesis, by creating novel pathways to produce bio-based polymers.
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24
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Investigating the Effect of Processing Parameters on the Products of Hydrothermal Carbonization of Corn Stover. SUSTAINABILITY 2020. [DOI: 10.3390/su12125100] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Corn stover is an abundant and underused source of lignocellulose waste biomass that can be transformed into a high-quality energy resource using hydrothermal carbonization (HTC). This investigation has focused on the effect of processing parameters on the products of HTC—namely solid fuel or hydrochar and liquid and gas fractions. HTC was conducted in a temperature-controlled small batch reactor with corn stover and deionized water under oxygen-free conditions obtained by pressurizing the reactor headspace with nitrogen gas. The properties of the hydrochar and liquid and gas fractions were evaluated as a function of the process temperature (250–350 °C), residence time (30–60 min) and biomass/water ratio (0.09–0.14). Central composite design modules in a response surface methodology were used to optimize processing parameters. The maximum mass yield, energy yield and high heating value (HHV) of the hydrochar produced were 29.91% dry weight (dw), 42.38% dw and 26.03 MJ/kg, respectively. Concentrations of acetic acid and hydrogen gas were 6.93 g/L and 0.25 v/v%, respectively. Experimental results after process optimization were in satisfactory agreement with the predicted HHV. The optimal HTC process parameters were determined to be 305 °C with a 60 min residence time and a biomass/water ratio of 0.114, yielding hydrochar with a HHV of 25.42 MJ/kg. The results confirm the feasibility of an alternative corn stover management system.
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26
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Consolidated bio-saccharification: Leading lignocellulose bioconversion into the real world. Biotechnol Adv 2020; 40:107535. [DOI: 10.1016/j.biotechadv.2020.107535] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 02/03/2020] [Accepted: 02/12/2020] [Indexed: 11/22/2022]
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Abstract
The development of biorefinery processes to platform chemicals for most lignocellulosic substrates, results in side processes to intermediates such as oligosaccharides. Agrofood wastes are most amenable to produce such intermediates, in particular, cellooligo-saccharides (COS), pectooligosaccharides (POS), xylooligosaccharides (XOS) and other less abundant oligomers containing mannose, arabinose, galactose and several sugar acids. These compounds show a remarkable bioactivity as prebiotics, elicitors in plants, food complements, healthy coadyuvants in certain therapies and more. They are medium to high added-value compounds with an increasing impact in the pharmaceutical, nutraceutical, cosmetic and food industries. This review is focused on the main production processes: autohydrolysis, acid and basic catalysis and enzymatic saccharification. Autohydrolysis of food residues at 160–190 °C leads to oligomer yields in the 0.06–0.3 g/g dry solid range, while acid hydrolysis of pectin (80–120 °C) or cellulose (45–180 °C) yields up to 0.7 g/g dry polymer. Enzymatic hydrolysis at 40–50 °C of pure polysaccharides results in 0.06–0.35 g/g dry solid (DS), with values in the range 0.08–0.2 g/g DS for original food residues.
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28
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Ladeira Ázar RIS, Bordignon-Junior SE, Laufer C, Specht J, Ferrier D, Kim D. Effect of Lignin Content on Cellulolytic Saccharification of Liquid Hot Water Pretreated Sugarcane Bagasse. Molecules 2020; 25:molecules25030623. [PMID: 32023910 PMCID: PMC7037451 DOI: 10.3390/molecules25030623] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Revised: 01/22/2020] [Accepted: 01/28/2020] [Indexed: 11/16/2022] Open
Abstract
Lignin contributes to the rigid structure of the plant cell wall and is partially responsible for the recalcitrance of lignocellulosic materials to enzymatic digestion. Overcoming this recalcitrance is one the most critical issues in a sugar-flat form process. This study addresses the effect of low lignin sugarcane bagasse on enzymatic hydrolysis after liquid hot water pretreatment at 190 °C and 20 min (severity factor: 3.95). The hydrolysis of bagasse from a sugarcane line selected for a relatively low lignin content, gave an 89.7% yield of cellulose conversion to glucose at 40 FPU/g glucan versus a 68.3% yield from a comparably treated bagasse from the high lignin bred line. A lower enzyme loading of 5 FPU/g glucan (equivalent to 3.2 FPU/g total solids) resulted in 31.4% and 21.9% conversion yields, respectively, for low and high lignin samples, suggesting the significance of lignin content in the saccharification process. Further increases in the enzymatic conversion of cellulose to glucose were achieved when the bagasse sample was pre-incubated with a lignin blocking agent, e.g., bovine serum albumin (50 mg BSA/g glucan) at 50 °C for 1 h prior to an actual saccharification. In this work, we have demonstrated that even relatively small differences in lignin content can result in considerably increased sugar production, which supports the dissimilarity of bagasse lignin content and its effects on cellulose digestibility. The increased glucose yields with the addition of BSA helped to decrease the inhibition of non-productive absorption of cellulose enzymes onto lignin and solid residual lignin fractions.
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Affiliation(s)
- Rafaela I. S. Ladeira Ázar
- Department of Biochemistry and Molecular Biology, BIOAGRO, Federal University of Viçosa, Viçosa, Minas Gerais 36570-000, Brazil;
| | - Sidnei Emilio Bordignon-Junior
- Laboratory of Biochemistry and Applied Microbiology, São Paulo State University (UNESP), IBILCE, 2265 Cristóvão Colombo, São José do Rio Preto 15054-000, São Paulo, Brazil;
| | - Craig Laufer
- Department of Biology, Hood College, 401 Rosemont Avenue, Frederick, MD 21701, USA; (C.L.); (J.S.); (D.F.)
| | - Jordan Specht
- Department of Biology, Hood College, 401 Rosemont Avenue, Frederick, MD 21701, USA; (C.L.); (J.S.); (D.F.)
| | - Drew Ferrier
- Department of Biology, Hood College, 401 Rosemont Avenue, Frederick, MD 21701, USA; (C.L.); (J.S.); (D.F.)
| | - Daehwan Kim
- Department of Biology, Hood College, 401 Rosemont Avenue, Frederick, MD 21701, USA; (C.L.); (J.S.); (D.F.)
- Correspondence: ; Tel.: +1-765-637-8603; Fax: +1-301-696-3667
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Cheng MH, Dien BS, Lee DK, Singh V. Sugar production from bioenergy sorghum by using pilot scale continuous hydrothermal pretreatment combined with disk refining. BIORESOURCE TECHNOLOGY 2019; 289:121663. [PMID: 31234074 DOI: 10.1016/j.biortech.2019.121663] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 06/14/2019] [Accepted: 06/15/2019] [Indexed: 06/09/2023]
Abstract
Chemical-free pretreatments are attracting increased interest because they generate less inhibitor in hydrolysates. In this study, pilot-scaled continuous hydrothermal (PCH) pretreatment followed by disk refining was evaluated and compared to laboratory-scale batch hot water (LHW) pretreatment. Bioenergy sorghum bagasse (BSB) was pretreated at 160-190 °C for 10 min with and without subsequent disk milling. Hydrothermal pretreatment and disk milling synergistically improved glucose and xylose release by 10-20% compared to hydrothermal pretreatment alone. Maximum yields of glucose and xylose of 82.55% and 70.78%, respectively were achieved, when BSB was pretreated at 190 °C and 180 °C followed by disk milling. LHW pretreated BSB had 5-15% higher sugar yields compared to PCH for all pretreatment conditions. The surface area improvement was also performed. PCH pretreatment combined with disk milling increased BSB surface area by 31.80-106.93%, which was greater than observed using LHW pretreatment.
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Affiliation(s)
- Ming-Hsun Cheng
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Bruce S Dien
- Bioenergy Research Unit, National Center for Agricultural Utilization Research, USDA-ARS, Peoria, IL 61604, USA
| | - D K Lee
- Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Vijay Singh
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
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Ding C, Wang X, Li M. Evaluation of six white-rot fungal pretreatments on corn stover for the production of cellulolytic and ligninolytic enzymes, reducing sugars, and ethanol. Appl Microbiol Biotechnol 2019; 103:5641-5652. [DOI: 10.1007/s00253-019-09884-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/12/2019] [Accepted: 04/29/2019] [Indexed: 11/24/2022]
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Huang M, Cheng J, Chen P, Zheng G, Wang D, Hu Y. Efficient production of succinic acid in engineered Escherichia coli strains controlled by anaerobically-induced nirB promoter using sweet potato waste hydrolysate. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 237:147-154. [PMID: 30784862 DOI: 10.1016/j.jenvman.2019.02.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 12/30/2018] [Accepted: 02/07/2019] [Indexed: 06/09/2023]
Abstract
Succinic acid has attracted interest worldwide as a precursor of many industrially crucial chemicals. Biosynthesis of succinic acid from biomass is developing as an environmentally friendly strategy now. Conversion of sweet potato waste (SPW) to succinic acid could implement high-value utilization of biomass, cut cost of the fermentation process and reduce the pollution of environment. Engineered Escherichia coli (E. coli) strain HD134 under the control of anaerobically-induced nirB promoter from Salmonella enterica (PSnirB) could produce about 16.30 g/L succinic acid with a yield of 0.83 g/g after 48 h on glucose. With SPW hydrolysate as the substrate, 18.65 g/L succinic acid with a yield of 0.94 g/g after 48 h fermentation achieved. Compared to SD134 under Trc control induced with Isopropyl β-D-Thiogalactoside (IPTG), this concentration and yield represented an 8.56% and 6.82% increase, respectively. The use of anaerobically-induced PSnirB not only could attain higher production of succinic acid than IPTG-induced Trc promoter, but omit cost of expensive exogenous inducers. The efficient production of succinic acid from SPW was firstly studied by anaerobically-induced PSnirB control, which achieved relative lower cost compared to glucose as substrate and IPTG as the inducer. This novel fermentation process conduces to the cosmically industrial succinic acid bioproduction.
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Affiliation(s)
- Meihua Huang
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China; State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, PR China
| | - Jie Cheng
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China; State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, PR China
| | - Peng Chen
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China
| | - Gaowei Zheng
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, PR China
| | - Dan Wang
- Department of Chemical Engineering, School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 401331, PR China; State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, PR China.
| | - Yuanliang Hu
- Hubei Key Laboratory of Edible Wild Plants Conservation & Utilization, College of Life Sciences, Hubei Normal University, Huangshi 435002, PR China.
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Abo BO, Gao M, Wang Y, Wu C, Ma H, Wang Q. Lignocellulosic biomass for bioethanol: an overview on pretreatment, hydrolysis and fermentation processes. REVIEWS ON ENVIRONMENTAL HEALTH 2019; 34:57-68. [PMID: 30685745 DOI: 10.1515/reveh-2018-0054] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 12/17/2018] [Indexed: 05/14/2023]
Abstract
Bioethanol is currently the only alternative to gasoline that can be used immediately without having to make any significant changes in the way fuel is distributed. In addition, the carbon dioxide (CO2) released during the combustion of bioethanol is the same as that used by the plant in the atmosphere for its growth, so it does not participate in the increase of the greenhouse effect. Bioethanol can be obtained by fermentation of plants containing sucrose (beet, sugar cane…) or starch (wheat, corn…). However, large-scale use of bioethanol implies the use of very large agricultural surfaces for maize or sugarcane production. Lignocellulosic biomass (LCB) such as agricultural residues for the production of bioethanol seems to be a solution to this problem due to its high availability and low cost even if its growth still faces technological difficulties. In this review, we present an overview of lignocellulosic biomass, the different methods of pre-treatment of LCB and the various fermentation processes that can be used to produce bioethanol from LCB.
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Affiliation(s)
- Bodjui Olivier Abo
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
| | - Ming Gao
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
- Beijing Key Laboratory on Disposal and Resource Recovery of Industry Typical Pollutants, University of Science and Technology Beijing, Beijing, China
| | - Yonglin Wang
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
| | - Chuanfu Wu
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
- Beijing Key Laboratory on Disposal and Resource Recovery of Industry Typical Pollutants, University of Science and Technology Beijing, Beijing, China
| | - Hongzhi Ma
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
- Beijing Key Laboratory on Disposal and Resource Recovery of Industry Typical Pollutants, University of Science and Technology Beijing, Beijing, China
| | - Qunhui Wang
- Department of Environmental Engineering, School of Energy and Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China
- Beijing Key Laboratory on Disposal and Resource Recovery of Industry Typical Pollutants, University of Science and Technology Beijing, Beijing, China
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Yue X, He J, Xu Y, Yang M, Xu Y. A novel method for preparing microcrystalline cellulose from bleached chemical pulp using transition metal ions enhanced high temperature liquid water process. Carbohydr Polym 2019; 208:115-123. [DOI: 10.1016/j.carbpol.2018.12.072] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 12/14/2018] [Accepted: 12/21/2018] [Indexed: 10/27/2022]
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Li M, Sun L, Song X. Adding maize cobs to vertical subsurface flow constructed wetlands treating marine recirculating aquaculture system effluents: Carbon releasing kinetics and intensified nitrogen removal. BIORESOURCE TECHNOLOGY 2019; 274:267-271. [PMID: 30529331 DOI: 10.1016/j.biortech.2018.09.054] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 09/08/2018] [Accepted: 09/10/2018] [Indexed: 06/09/2023]
Abstract
This study aims to investigate the releasing behaviors of maize cobs with or without alkali (i.e. NaOH) pretreatment in seawater and distilled water, and to evaluate the effects of maize cobs addition (solid biomass and lixivium) on nitrogen removal in saline constructed wetland (CW) treating marine recirculating aquaculture system (RAS) effluents. Results revealed NaOH-treated maize cobs released carbon more efficiently, whether in seawater or in distilled water. Compared to distilled water, seawater conditions promoted carbon releasing. CW with maize cobs biomass and lixivium addition had high NO3-N removal efficiencies without significant difference, i.e. 94.9 ± 6.0% and 87.1 ± 13.2%, respectively. While CW with maize cobs biomass addition had higher effluent COD concentrations (16.3 ± 3.6 mg L-1) compared with those adding lixivium (2.1 ± 0.4 mg L-1). The study suggested adding maize cobs lixivium to be feasible and effective way to enhance nitrogen removal in saline CW.
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Affiliation(s)
- Meng Li
- Fisheries College, Ocean University of China, Qingdao 266001, China
| | - Linlin Sun
- Fisheries College, Ocean University of China, Qingdao 266001, China
| | - Xiefa Song
- Fisheries College, Ocean University of China, Qingdao 266001, China.
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Essien D, Richard TL. Ensiled Wet Storage Accelerates Pretreatment for Bioconversion of Corn Stover. Front Bioeng Biotechnol 2018; 6:195. [PMID: 30619843 PMCID: PMC6302026 DOI: 10.3389/fbioe.2018.00195] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 11/27/2018] [Indexed: 01/31/2023] Open
Abstract
Organic acids produced during ensiled wet storage are beneficial during the storage process, both for biomass preservation, and to aid in mild in-situ pretreatment. However, there is concern these acids could later have negative impacts on downstream processes, especially microbial fermentation. Organic acids can inhibit microbial metabolism or growth, which in turn could affect biofuel productivity or yield. This study investigated the interaction of organic acids produced during ensiled storage with subsequent pretreatment of the resulting corn stover silage, as well as the potential for interference with downstream ethanol fermentation. Interaction with pretreatment was observed by measuring xylan and glucan removal and the formation of inhibitors. The results indicated that organic acids generally do not impede downstream processes and in fact can be beneficial. The levels of organic acids produced during 220 days of storage jar tests at 23°C or 37°C, and their transformation during pretreatment, remained below inhibitory levels. Concentrations of individual acids did not exceed 6 g per liter of the pretreated volume, and < 5% on a dry matter basis. Whereas, unensiled corn stover required 15 min of 190°C pretreatment to optimize sugar release, ensiled corn stover could be treated equally effectively at a lower pretreatment duration of 10 min. Furthermore, the different organic acid profiles that accumulate at various storage moisture levels (35-65%) do not differ significantly in their impact on downstream ethanol fermentation. These results indicate biorefineries using ensiled corn stover feedstock at 35-65% moisture levels can expect as good or better biofuel yields as with unensiled stover, while reducing pretreatment costs.
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Affiliation(s)
- Dzidzor Essien
- Department of Agricultural and Biological Engineering, Pennsylvania State University, University Park, PA, United States
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Multicriteria Decision Model and Thermal Pretreatment of Hotel Food Waste for Robust Output to Biogas: Case Study from City of Jaipur, India. BIOMED RESEARCH INTERNATIONAL 2018; 2018:9416249. [PMID: 30306090 PMCID: PMC6165605 DOI: 10.1155/2018/9416249] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 04/20/2018] [Accepted: 08/07/2018] [Indexed: 11/18/2022]
Abstract
The anaerobic batch test (45 days at 37°C) was performed to describe the effect of thermal pretreatment at moderate temperatures (60, 80, and 100°C) over durations of 10 and 20 minutes on the enhancement of biogas production using hotel food waste from city of Jaipur, India. The results showed that the total cumulative biogas production with thermal pretreatment (100°C, 10 minutes) was 41% higher than the control. Also, this alternative gets first rank using multicriteria decision making model, VIKOR. This outcome was obtained due to the enhancement of degradation of organic compounds such as protein and volatile solids that occurred in the linear trend. Modified Gompertz and Logistic models were used to study the effect of different pretreatment parameters on lag time and biogas yield. Scanning electron microscopy and Fourier transform infrared spectroscopy were also employed to investigate the effect of thermal pretreatment on the physiochemical properties of food waste.
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Chemically crosslinked hydrogel and its driving force towards superabsorbent behaviour. Int J Biol Macromol 2018; 118:1422-1430. [DOI: 10.1016/j.ijbiomac.2018.06.159] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 06/03/2018] [Accepted: 06/27/2018] [Indexed: 02/05/2023]
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Mahmoodi P, Karimi K, Taherzadeh MJ. Hydrothermal processing as pretreatment for efficient production of ethanol and biogas from municipal solid waste. BIORESOURCE TECHNOLOGY 2018; 261:166-175. [PMID: 29660657 DOI: 10.1016/j.biortech.2018.03.115] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 03/25/2018] [Accepted: 03/26/2018] [Indexed: 06/08/2023]
Abstract
Organic fraction of municipal solid waste (OFMSW) is dominated by carbohydrates, including starch-based and lignocellulosic materials. The OFMSW was hydrothermally pretreated at 100-160 °C for 0-60 min, and then assessed for enzymatic ethanol production, followed by biogas production from the stillage. The highest glucose yield of 520 g/Kg of dry OFMSW, corresponding to 131% increase compared to that of the untreated OFMSW, was obtained after the pretreatment and enzymatic hydrolysis. Through ethanolic fermentation by an inhibitory tolerant fungus, Mucor indicus, 191.10 g ethanol/Kg of dry OFMSW was obtained, which was a 140.9% improvement in the ethanol yield compared to that from the untreated one. Methane production from the stillage (waste residues) resulted in 156 L/Kg OFMSW. In other words, a total of 10,774 KJ energy/Kg of dry OFMSW was generated at the best conditions.
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Affiliation(s)
- Peyman Mahmoodi
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran
| | - Keikhosro Karimi
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan 84156-83111, Iran; Industrial Biotechnology Group, Research Institute of Biotechnology and Bioengineering, Isfahan University of Technology, Isfahan 84156-83111, Iran.
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Wang Z, Dien BS, Rausch KD, Tumbleson ME, Singh V. Fermentation of undetoxified sugarcane bagasse hydrolyzates using a two stage hydrothermal and mechanical refining pretreatment. BIORESOURCE TECHNOLOGY 2018; 261:313-321. [PMID: 29677659 DOI: 10.1016/j.biortech.2018.04.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 04/02/2018] [Accepted: 04/04/2018] [Indexed: 06/08/2023]
Abstract
In this study, liquid hot water pretreatment was combined with disk milling for pretreatment of sugarcane bagasse. Sugarcane bagasse was pretreated using liquid hot water (LHW) at 140-180 °C for 10 min (20% w/w solids content) and then disk milled. Disk milling improved glucose release 41-177% and ethanol production from glucose/xylose cofermentation by 80% compared to only using LHW pretreatment. The highest ethanol conversion efficiency achieved was 94%, which was observed when bagasse was treated at 180 °C with LHW and disk milled. However, a small amount of residual xylose (3 g/L) was indicative that further improvement could be achieved to increase ethanol production.
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Affiliation(s)
- Zhaoqin Wang
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Bruce S Dien
- National Center for Agricultural Utilization Research, US Department of Agriculture, Peoria, IL, USA
| | - Kent D Rausch
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - M E Tumbleson
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Vijay Singh
- Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, USA.
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Mokomele T, da Costa Sousa L, Balan V, van Rensburg E, Dale BE, Görgens JF. Ethanol production potential from AFEX™ and steam-exploded sugarcane residues for sugarcane biorefineries. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:127. [PMID: 29755586 PMCID: PMC5934847 DOI: 10.1186/s13068-018-1130-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 04/25/2018] [Indexed: 05/05/2023]
Abstract
BACKGROUND Expanding biofuel markets are challenged by the need to meet future biofuel demands and mitigate greenhouse gas emissions, while using domestically available feedstock sustainably. In the context of the sugar industry, exploiting under-utilized cane leaf matter (CLM) in addition to surplus sugarcane bagasse as supplementary feedstock for second-generation ethanol production has the potential to improve bioenergy yields per unit land. In this study, the ethanol yields and processing bottlenecks of ammonia fibre expansion (AFEX™) and steam explosion (StEx) as adopted technologies for pretreating sugarcane bagasse and CLM were experimentally measured and compared for the first time. RESULTS Ethanol yields between 249 and 256 kg Mg-1 raw dry biomass (RDM) were obtained with AFEX™-pretreated sugarcane bagasse and CLM after high solids loading enzymatic hydrolysis and fermentation. In contrast, StEx-pretreated sugarcane bagasse and CLM resulted in substantially lower ethanol yields that ranged between 162 and 203 kg Mg-1 RDM. The ethanol yields from StEx-treated sugarcane residues were limited by the aggregated effect of sugar degradation during pretreatment, enzyme inhibition during enzymatic hydrolysis and microbial inhibition of S. cerevisiae 424A (LNH-ST) during fermentation. However, relatively high enzyme dosages (> 20 mg g-1 glucan) were required irrespective of pretreatment method to reach 75% carbohydrate conversion, even when optimal combinations of Cellic® CTec3, Cellic® HTec3 and Pectinex Ultra-SP were used. Ethanol yields per hectare sugarcane cultivation area were estimated at 4496 and 3416 L ha-1 for biorefineries using AFEX™- or StEx-treated sugarcane residues, respectively. CONCLUSIONS AFEX™ proved to be a more effective pretreatment method for sugarcane residues relative to StEx due to the higher fermentable sugar recovery and enzymatic hydrolysate fermentability after high solids loading enzymatic hydrolysis and fermentation by S. cerevisiae 424A (LNH-ST). The identification of auxiliary enzyme activities, adequate process integration and the use of robust xylose-fermenting ethanologens were identified as opportunities to further improve ethanol yields from AFEX™- and StEx-treated sugarcane residues.
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Affiliation(s)
- Thapelo Mokomele
- Department of Process Engineering, Stellenbosch University, Private Bag X1 Matieland, Stellenbosch, South Africa
- Biomass Conversion Research Laboratory, Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, USA
| | - Leonardo da Costa Sousa
- Biomass Conversion Research Laboratory, Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, USA
- Great Lakes Bioenergy Research Center (GLBRC), Michigan State University, East Lansing, MI USA
| | - Venkatesh Balan
- Biomass Conversion Research Laboratory, Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, USA
- Department of Engineering Technology, Biotechnology Program, School of Technology, University of Houston, 4800 Calhoun, Road, Houston, TX 77004 USA
| | - Eugéne van Rensburg
- Department of Process Engineering, Stellenbosch University, Private Bag X1 Matieland, Stellenbosch, South Africa
| | - Bruce E. Dale
- Biomass Conversion Research Laboratory, Department of Chemical Engineering and Materials Science, Michigan State University, East Lansing, USA
- Great Lakes Bioenergy Research Center (GLBRC), Michigan State University, East Lansing, MI USA
| | - Johann F. Görgens
- Department of Process Engineering, Stellenbosch University, Private Bag X1 Matieland, Stellenbosch, South Africa
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Wendt LM, Murphy JA, Smith WA, Robb T, Reed DW, Ray AE, Liang L, He Q, Sun N, Hoover AN, Nguyen QA. Compatibility of High-Moisture Storage for Biochemical Conversion of Corn Stover: Storage Performance at Laboratory and Field Scales. Front Bioeng Biotechnol 2018; 6:30. [PMID: 29632861 PMCID: PMC5879930 DOI: 10.3389/fbioe.2018.00030] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 03/09/2018] [Indexed: 11/13/2022] Open
Abstract
Wet anaerobic storage of corn stover can provide a year-round supply of feedstock to biorefineries meanwhile serving an active management approach to reduce the risks associated with fire loss and microbial degradation. Wet logistics systems employ particle size reduction early in the supply chain through field-chopping which removes the dependency on drying corn stover prior to baling, expands the harvest window, and diminishes the biorefinery size reduction requirements. Over two harvest years, in-field forage chopping was capable of reducing over 60% of the corn stover to a particle size of 6 mm or less. Aerobic and anaerobic storage methods were evaluated for wet corn stover in 100 L laboratory reactors. Of the methods evaluated, traditional ensiling resulted in <6% total solid dry matter loss (DML), about five times less than the aerobic storage process and slightly less than half that of the anaerobic modified-Ritter pile method. To further demonstrate the effectiveness of the anaerobic storage, a field demonstration was completed with 272 dry tonnes of corn stover; DML averaged <5% after 6 months. Assessment of sugar release as a result of dilute acid or dilute alkaline pretreatment and subsequent enzymatic hydrolysis suggested that when anaerobic conditions were maintained in storage, sugar release was either similar to or greater than as-harvested material depending on the pretreatment chemistry used. This study demonstrates that wet logistics systems offer practical benefits for commercial corn stover supply, including particle size reduction during harvest, stability in storage, and compatibility with biochemical conversion of carbohydrates for biofuel production. Evaluation of the operational efficiencies and costs is suggested to quantify the potential benefits of a fully-wet biomass supply system to a commercial biorefinery.
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Affiliation(s)
- Lynn M Wendt
- Idaho National Laboratory, Idaho Falls, ID, United States
| | | | | | - Thomas Robb
- Independent Researcher, Olathe, KS, United States
| | - David W Reed
- Idaho National Laboratory, Idaho Falls, ID, United States
| | - Allison E Ray
- Idaho National Laboratory, Idaho Falls, ID, United States
| | - Ling Liang
- Advanced Biofuels Process Development Unit, Lawrence Berkeley National Laboratory, Emeryville, CA, United States
| | - Qian He
- Advanced Biofuels Process Development Unit, Lawrence Berkeley National Laboratory, Emeryville, CA, United States
| | - Ning Sun
- Advanced Biofuels Process Development Unit, Lawrence Berkeley National Laboratory, Emeryville, CA, United States
| | - Amber N Hoover
- Idaho National Laboratory, Idaho Falls, ID, United States
| | - Quang A Nguyen
- Idaho National Laboratory, Idaho Falls, ID, United States
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Yao K, Wu Q, An R, Meng W, Ding M, Li B, Yuan Y. Hydrothermal pretreatment for deconstruction of plant cell wall: Part I. Effect on lignin-carbohydrate complex. AIChE J 2018. [DOI: 10.1002/aic.16114] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Kun Yao
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering, Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Qinfeng Wu
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering, Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Ran An
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering, Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Wei Meng
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering, Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Mingzhu Ding
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering, Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Bingzhi Li
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering, Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Yingjin Yuan
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering, Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
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Yao K, Wu Q, An R, Meng W, Ding M, Li B, Yuan Y. Hydrothermal pretreatment for deconstruction of plant cell wall: Part II. Effect on cellulose structure and bioconversion. AIChE J 2018. [DOI: 10.1002/aic.16106] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kun Yao
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Qinfeng Wu
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Ran An
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Wei Meng
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Mingzhu Ding
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Bingzhi Li
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
| | - Yingjin Yuan
- School of Chemical Engineering and Technology; Tianjin University; Tianjin 300072 China
- Key Laboratory of Systems Bioengineering; Ministry of Education; Tianjin 300072 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
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Physico-Chemical Conversion of Lignocellulose: Inhibitor Effects and Detoxification Strategies: A Mini Review. Molecules 2018; 23:molecules23020309. [PMID: 29389875 PMCID: PMC6017906 DOI: 10.3390/molecules23020309] [Citation(s) in RCA: 157] [Impact Index Per Article: 26.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2017] [Revised: 01/18/2018] [Accepted: 01/30/2018] [Indexed: 11/20/2022] Open
Abstract
A pretreatment of lignocellulosic biomass to produce biofuels, polymers, and other chemicals plays a vital role in the biochemical conversion process toward disrupting the closely associated structures of the cellulose-hemicellulose-lignin molecules. Various pretreatment steps alter the chemical/physical structure of lignocellulosic materials by solubilizing hemicellulose and/or lignin, decreasing the particle sizes of substrate and the crystalline portions of cellulose, and increasing the surface area of biomass. These modifications enhance the hydrolysis of cellulose by increasing accessibilities of acids or enzymes onto the surface of cellulose. However, lignocellulose-derived byproducts, which can inhibit and/or deactivate enzyme and microbial biocatalysts, are formed, including furan derivatives, lignin-derived phenolics, and carboxylic acids. These generation of compounds during pretreatment with inhibitory effects can lead to negative effects on subsequent steps in sugar flat-form processes. A number of physico-chemical pretreatment methods such as steam explosion, ammonia fiber explosion (AFEX), and liquid hot water (LHW) have been suggested and developed for minimizing formation of inhibitory compounds and alleviating their effects on ethanol production processes. This work reviews the physico-chemical pretreatment methods used for various biomass sources, formation of lignocellulose-derived inhibitors, and their contributions to enzymatic hydrolysis and microbial activities. Furthermore, we provide an overview of the current strategies to alleviate inhibitory compounds present in the hydrolysates or slurries.
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Lan W, Amiri MT, Hunston CM, Luterbacher JS. Protection Group Effects During α,γ-Diol Lignin Stabilization Promote High-Selectivity Monomer Production. Angew Chem Int Ed Engl 2018; 57:1356-1360. [PMID: 29210487 DOI: 10.1002/anie.201710838] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2017] [Indexed: 11/06/2022]
Abstract
Protection groups were introduced during biomass pretreatment to stabilize lignin's α,γ-diol group during its extraction and prevent its condensation. Acetaldehyde and propionaldehyde stabilized the α,γ-diol without any aromatic ring alkylation, which significantly increased final product selectivity. The subsequent hydrogenolysis catalyzed by Pd/C generated lignin monomers at near-theoretical yields based on Klason lignin (48 % from birch, 20 % from spruce, 70 % from high-syringyl transgenic poplar), and with high selectivity to a single 4-n-propanolsyringol product (80 %) in the case of the poplar. Unlike direct hydrogenation of native wood, hydrogenolysis of protected lignin with Ni/C also led to high selectivity to this single product (78 %), paving the way to high-selectivity lignin upgrading with base metal catalysts. The use of extracted lignin facilitated valorization of polysaccharides, leading to high yields of all three major biomass polymers to a single major product.
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Affiliation(s)
- Wu Lan
- Laboratory of Sustainable and Catalytic Processing, Institute of Chemical Sciences and Engineering, École polytechnique fédérale de Lausanne, EPFL, 1015, Lausanne, Switzerland
| | - Masoud Talebi Amiri
- Laboratory of Sustainable and Catalytic Processing, Institute of Chemical Sciences and Engineering, École polytechnique fédérale de Lausanne, EPFL, 1015, Lausanne, Switzerland
| | - Christopher M Hunston
- Laboratory of Sustainable and Catalytic Processing, Institute of Chemical Sciences and Engineering, École polytechnique fédérale de Lausanne, EPFL, 1015, Lausanne, Switzerland
| | - Jeremy S Luterbacher
- Laboratory of Sustainable and Catalytic Processing, Institute of Chemical Sciences and Engineering, École polytechnique fédérale de Lausanne, EPFL, 1015, Lausanne, Switzerland
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Lan W, Amiri MT, Hunston CM, Luterbacher JS. Protection Group Effects During α,γ-Diol Lignin Stabilization Promote High-Selectivity Monomer Production. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201710838] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Wu Lan
- Laboratory of Sustainable and Catalytic Processing; Institute of Chemical Sciences and Engineering; École polytechnique fédérale de Lausanne, EPFL; 1015 Lausanne Switzerland
| | - Masoud Talebi Amiri
- Laboratory of Sustainable and Catalytic Processing; Institute of Chemical Sciences and Engineering; École polytechnique fédérale de Lausanne, EPFL; 1015 Lausanne Switzerland
| | - Christopher M. Hunston
- Laboratory of Sustainable and Catalytic Processing; Institute of Chemical Sciences and Engineering; École polytechnique fédérale de Lausanne, EPFL; 1015 Lausanne Switzerland
| | - Jeremy S. Luterbacher
- Laboratory of Sustainable and Catalytic Processing; Institute of Chemical Sciences and Engineering; École polytechnique fédérale de Lausanne, EPFL; 1015 Lausanne Switzerland
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Khatri V, Meddeb-Mouelhi F, Adjallé K, Barnabé S, Beauregard M. Determination of optimal biomass pretreatment strategies for biofuel production: investigation of relationships between surface-exposed polysaccharides and their enzymatic conversion using carbohydrate-binding modules. BIOTECHNOLOGY FOR BIOFUELS 2018; 11:144. [PMID: 29796085 PMCID: PMC5960114 DOI: 10.1186/s13068-018-1145-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 05/09/2018] [Indexed: 05/03/2023]
Abstract
BACKGROUND Pretreatment of lignocellulosic biomass (LCB) is a key step for its efficient bioconversion into ethanol. Determining the best pretreatment and its parameters requires monitoring its impacts on the biomass material. Here, we used fluorescent protein-tagged carbohydrate-binding modules method (FTCM)-depletion assay to study the relationship between surface-exposed polysaccharides and enzymatic hydrolysis of LCB. RESULTS Our results indicated that alkali extrusion pretreatment led to the highest hydrolysis rates for alfalfa stover, cattail stems and flax shives, despite its lower lignin removal efficiency compared to alkali pretreatment. Corn crop residues were more sensitive to alkali pretreatments, leading to higher hydrolysis rates. A clear relationship was consistently observed between total surface-exposed cellulose detected by the FTCM-depletion assay and biomass enzymatic hydrolysis. Comparison of bioconversion yield and total composition analysis (by NREL/TP-510-42618) of LCB prior to or after pretreatments did not show any close relationship. Lignin removal efficiency and total cellulose content (by NREL/TP-510-42618) led to an unreliable prediction of enzymatic polysaccharide hydrolysis. CONCLUSIONS Fluorescent protein-tagged carbohydrate-binding modules method (FTCM)-depletion assay provided direct evidence that cellulose exposure is the key determinant of hydrolysis yield. The clear and robust relationships that were observed between the cellulose accessibility by FTCM probes and enzymatic hydrolysis rates change could be evolved into a powerful prediction tool that might help develop optimal biomass pretreatment strategies for biofuel production.
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Affiliation(s)
- Vinay Khatri
- Centre de recherche sur les matériaux lignocellulosiques, Université du Québec à Trois-Rivières, C.P. 500, Trois-Rivières, QC G9A 5H7 Canada
- PROTEO, Université Laval, Québec, QC G1V 4G2 Canada
| | - Fatma Meddeb-Mouelhi
- Centre de recherche sur les matériaux lignocellulosiques, Université du Québec à Trois-Rivières, C.P. 500, Trois-Rivières, QC G9A 5H7 Canada
- PROTEO, Université Laval, Québec, QC G1V 4G2 Canada
| | - Kokou Adjallé
- Centre de recherche sur les matériaux lignocellulosiques, Université du Québec à Trois-Rivières, C.P. 500, Trois-Rivières, QC G9A 5H7 Canada
| | - Simon Barnabé
- Centre de recherche sur les matériaux lignocellulosiques, Université du Québec à Trois-Rivières, C.P. 500, Trois-Rivières, QC G9A 5H7 Canada
| | - Marc Beauregard
- Centre de recherche sur les matériaux lignocellulosiques, Université du Québec à Trois-Rivières, C.P. 500, Trois-Rivières, QC G9A 5H7 Canada
- PROTEO, Université Laval, Québec, QC G1V 4G2 Canada
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Michelin M, Ruiz HA, Polizeli MDLTM, Teixeira JA. Multi-step approach to add value to corncob: Production of biomass-degrading enzymes, lignin and fermentable sugars. BIORESOURCE TECHNOLOGY 2018; 247:582-590. [PMID: 28982088 DOI: 10.1016/j.biortech.2017.09.128] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 09/16/2017] [Accepted: 09/18/2017] [Indexed: 06/07/2023]
Abstract
This work presents an integrated and multi-step approach for the recovery and/or application of the lignocellulosic fractions from corncob in the production of high value added compounds as xylo-oligosaccharides, enzymes, fermentable sugars, and lignin in terms of biorefinery concept. For that, liquid hot water followed by enzymatic hydrolysis were used. Liquid hot water was performed using different residence times (10-50min) and holding temperature (180-200°C), corresponding to severities (log(R0)) of 3.36-4.64. The most severe conditions showed higher xylo-oligosaccharides extraction (maximum of 93%) into the hydrolysates and higher recovery of cellulose on pretreated solids (maximum of 65%). Subsequently, hydrolysates and solids were used in the production of xylanases and cellulases, respectively, as well as, pretreated solids were also subjected to enzymatic hydrolysis for the recovery of lignin and fermentable sugars from cellulose. Maximum glucose yield (100%) was achieved for solids pretreated at log(R0) of 4.42 and 5% solid loading.
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Affiliation(s)
- Michele Michelin
- CEB - Centre of Biological Engineering, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal.
| | - Héctor A Ruiz
- Biorefinery Group, Food Research Department, Faculty of Chemistry Sciences, Autonomous University of Coahuila, 25280 Saltillo, Coahuila, Mexico; Cluster of Bioalcohols, Mexican Centre for Innovation in Bioenergy (Cemie-Bio), Mexico
| | - Maria de Lourdes T M Polizeli
- Department of Biology, School of Philosophy, Sciences and Literature of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP 14040-901, Brazil
| | - José A Teixeira
- CEB - Centre of Biological Engineering, University of Minho, Campus Gualtar, 4710-057 Braga, Portugal
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