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Rabi Prasad B, Polaki S, Padhi RK. Isolation of delignifying bacteria and optimization of microbial pretreatment of biomass for bioenergy. Biotechnol Lett 2024; 46:183-199. [PMID: 38252364 DOI: 10.1007/s10529-023-03463-y] [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: 10/30/2023] [Revised: 11/30/2023] [Accepted: 12/17/2023] [Indexed: 01/23/2024]
Abstract
Microbial pretreatment of lignocellulosic biomass holds significant promise for environmentally friendly biofuel production, offering an alternative to fossil fuels. This study focused on the isolation and characterization of two novel delignifying bacteria, GIET1 and GIET2, to enhance cellulose accessibility by lignin degradation. Molecular characterization confirmed their genetic identities, providing valuable microbial resources for biofuel production. Our results revealed distinct preferences for temperature, pH, and incubation period for the two bacteria. Bacillus haynesii exhibited optimal performance under moderate conditions and shorter incubation period, making it suitable for rice straw and sugarcane bagasse pretreatment. In contrast, Paenibacillus alvei thrived at higher temperatures and slightly alkaline pH, requiring a longer incubation period ideal for corn stalk pretreatment. These strain-specific requirements highlight the importance of tailoring pretreatment conditions to specific feedstocks. Structural, chemical, and morphological analyses demonstrated that microbial pretreatment reduced the amorphous lignin, increasing cellulose crystallinity and accessibility. These findings underscore the potential of microbial pretreatment to enhance biofuel production by modifying the lignocellulosic biomass. Such environmentally friendly bioconversion processes offer sustainable and cleaner energy solutions. Further research to optimize these methods for scalability and broader application is necessary in the pursuit for more efficient and greener biofuel production.
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Affiliation(s)
- B Rabi Prasad
- Department of Biotechnology, SoET, GIET University, Gunupur, Odisha, 765022, India.
| | - Suman Polaki
- Department of Biotechnology, SoET, GIET University, Gunupur, Odisha, 765022, India
| | - Radha Krushna Padhi
- Department of Chemical Engineering, SoET, GIET University, Gunupur, Odisha, 765022, India
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2
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Guo J, Li J, Liu D, Xu Y. Insight into key obstacles and technological strategy for enzymatic digestion of full cellulose fraction from poplar sawdust. BIORESOURCE TECHNOLOGY 2024; 391:129994. [PMID: 37944623 DOI: 10.1016/j.biortech.2023.129994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 10/24/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023]
Abstract
Lignocellulosic biomass mainly consists of hemicellulose, lignin, and cellulose, which differently affect the enzymatic digestibility of cellulose. As for the typical representative for inert woody biomass, three components of cellulose were proposed conceptually for poplar sawdust, i.e., active cellulose, inert cellulose, and resistant cellulose. Dilute sulfuric acid pretreatment, hydrogen peroxide-sulfuric acid delignification, and sulfuric acid-assisted glycerol swelling were, respectively, proven to break the three obstacle mechanisms that affect the cellulase of poplar. The removal of key obstacles improved the cellulase digestibility of poplar enzyme-hydrolyzed residues by 188.7 %, and glucose yield increased from 34.6 % to 99.9 %. Therefore, a total of 39.5 g glucose was obtained from 100 g poplar sawdust by integrating the above three technologies. This work presented insight into and removed the key obstacles to enzymatic digestibility of poplar cellulose and developed an integrated technology to effectively convert full cellulose fraction to glucose from woody biomass.
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Affiliation(s)
- Jianming Guo
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China; Jiangsu Province Key Laboratory of Green Biomass-based Fuels and Chemicals, Nanjing 210037, People's Republic of China
| | - Jing Li
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China; Jiangsu Province Key Laboratory of Green Biomass-based Fuels and Chemicals, Nanjing 210037, People's Republic of China
| | - Dylan Liu
- Food Science and Sustainability, Institute of Innovation, Science and Sustainability, Federation University Australia
| | - Yong Xu
- Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, People's Republic of China; Jiangsu Province Key Laboratory of Green Biomass-based Fuels and Chemicals, Nanjing 210037, People's Republic of China.
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3
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Shavyrkina NA, Budaeva VV, Skiba EA, Gismatulina YA, Sakovich GV. Review of Current Prospects for Using Miscanthus-Based Polymers. Polymers (Basel) 2023; 15:3097. [PMID: 37514486 PMCID: PMC10383910 DOI: 10.3390/polym15143097] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 07/10/2023] [Accepted: 07/18/2023] [Indexed: 07/30/2023] Open
Abstract
Carbon neutrality is a requisite for industrial development in modern times. In this paper, we review information on possible applications of polymers from the energy crop Miscanthus in the global industries, and we highlight the life cycle aspects of Miscanthus in detail. We discuss the benefits of Miscanthus cultivation on unoccupied marginal lands as well as the rationale for the capabilities of Miscanthus regarding both soil carbon storage and soil remediation. We also discuss key trends in the processing of Miscanthus biopolymers for applications such as a fuel resources, as part of composite materials, and as feedstock for fractionation in order to extract cellulose, lignin, and other valuable chemicals (hydroxymethylfurfural, furfural, phenols) for the subsequent chemical synthesis of a variety of products. The potentialities of the biotechnological transformation of the Miscanthus biomass into carbohydrate nutrient media and then into the final products of microbiological synthesis are also examined herein.
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Affiliation(s)
- Nadezhda A Shavyrkina
- Laboratory of Bioconversion, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk 659322, Russia
- Department of Biotechnology, Biysk Technological Institute, Polzunov Altai State Technical University, Biysk 659305, Russia
| | - Vera V Budaeva
- Laboratory of Bioconversion, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk 659322, Russia
| | - Ekaterina A Skiba
- Laboratory of Bioconversion, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk 659322, Russia
| | - Yulia A Gismatulina
- Laboratory of Bioconversion, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk 659322, Russia
| | - Gennady V Sakovich
- Laboratory of Bioconversion, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk 659322, Russia
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Deivayanai VC, Yaashikaa PR, Senthil Kumar P, Rangasamy G. A comprehensive review on the biological conversion of lignocellulosic biomass into hydrogen: Pretreatment strategy, technology advances and perspectives. BIORESOURCE TECHNOLOGY 2022; 365:128166. [PMID: 36283663 DOI: 10.1016/j.biortech.2022.128166] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/13/2022] [Accepted: 10/17/2022] [Indexed: 05/16/2023]
Abstract
The globe has dependent on energy generation and utilization for many years; conversely, ecological concerns constrained the world to view hydrogen as an alternative for economic development. Lignocellulosic biomass is broadly accessible as a low-cost renewable feedstock and nonreactive nature; it has received a lot of consideration as a global energy source and the most attractive alternative to replace fossil natural substances for energy production. Pretreatment of lignocellulosic biomass is essential to advance its fragmentation and lower the lignin content for sustainable energy generation. This review's goal is to provide the different pretreatment strategies for enlarging the solubility and surface area of lignocellulosic biomass. The biological conversion of lignocellulosic biomass to hydrogen was reviewed and operational conditions and enhancing methods were discussed. This review summarizes the working conditions, parameters, yield percentages, techno-economic analysis, challenges, and future recommendations on the direct conversion of biomass to hydrogen.
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Affiliation(s)
- V C Deivayanai
- Department of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai 602105, India
| | - P R Yaashikaa
- Department of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai 602105, India
| | - P Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai 603110, India; Centre of Excellence in Water Research (CEWAR), Sri Sivasubramaniya Nadar College of Engineering, Chennai 603110, India; School of Engineering, Lebanese American University, Byblos, Lebanon.
| | - Gayathri Rangasamy
- University Centre for Research and Development & Department of Civil Engineering, Chandigarh University, Gharuan, Mohali, Punjab 140413, India
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Shavyrkina NA, Skiba EA, Kazantseva AE, Gladysheva EK, Budaeva VV, Bychin NV, Gismatulina YA, Kashcheyeva EI, Mironova GF, Korchagina AA, Pavlov IN, Sakovich GV. Static Culture Combined with Aeration in Biosynthesis of Bacterial Cellulose. Polymers (Basel) 2021; 13:4241. [PMID: 34883747 PMCID: PMC8659626 DOI: 10.3390/polym13234241] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Revised: 11/26/2021] [Accepted: 12/02/2021] [Indexed: 11/17/2022] Open
Abstract
One of the ways to enhance the yield of bacterial cellulose (BC) is by using dynamic aeration and different-type bioreactors because the microbial producers are strict aerobes. But in this case, the BC quality tends to worsen. Here we have combined static culture with aeration in the biosynthesis of BC by symbiotic Medusomyces gisevii Sa-12 for the first time. A new aeration method by feeding the air onto the growth medium surface is proposed herein. The culture was performed in a Binder-400 climate chamber. The study found that the air feed at a rate of 6.3 L/min allows a 25% increase in the BC yield. Moreover, this aeration mode resulted in BC samples of stable quality. The thermogravimetric and X-ray structural characteristics were retained: the crystallinity index in reflection and transmission geometries were 89% and 92%, respectively, and the allomorph Iα content was 94%. Slight decreases in the degree of polymerization (by 12.0% compared to the control-no aeration) and elastic modulus (by 12.6%) are not critical. Thus, the simple aeration by feeding the air onto the culture medium surface has turned out to be an excellent alternative to dynamic aeration. Usually, when the cultivation conditions, including the aeration ones, are changed, characteristics of the resultant BC are altered either, due to the sensitivity of individual microbial strains. In our case, the stable parameters of BC samples under variable aeration conditions are explained by the concomitant factors: the new efficient aeration method and the highly adaptive microbial producer-symbiotic Medusomyces gisevii Sa-12.
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Affiliation(s)
- Nadezhda A. Shavyrkina
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (N.A.S.); (E.A.S.); (A.E.K.); (E.K.G.); (N.V.B.); (Y.A.G.); (E.I.K.); (G.F.M.); (A.A.K.); (I.N.P.); (G.V.S.)
- Biysk Technological Institute, Polzunov Altai State Technical University, 659305 Biysk, Russia
| | - Ekaterina A. Skiba
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (N.A.S.); (E.A.S.); (A.E.K.); (E.K.G.); (N.V.B.); (Y.A.G.); (E.I.K.); (G.F.M.); (A.A.K.); (I.N.P.); (G.V.S.)
- Biysk Technological Institute, Polzunov Altai State Technical University, 659305 Biysk, Russia
| | - Anastasia E. Kazantseva
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (N.A.S.); (E.A.S.); (A.E.K.); (E.K.G.); (N.V.B.); (Y.A.G.); (E.I.K.); (G.F.M.); (A.A.K.); (I.N.P.); (G.V.S.)
| | - Evgenia K. Gladysheva
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (N.A.S.); (E.A.S.); (A.E.K.); (E.K.G.); (N.V.B.); (Y.A.G.); (E.I.K.); (G.F.M.); (A.A.K.); (I.N.P.); (G.V.S.)
| | - Vera V. Budaeva
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (N.A.S.); (E.A.S.); (A.E.K.); (E.K.G.); (N.V.B.); (Y.A.G.); (E.I.K.); (G.F.M.); (A.A.K.); (I.N.P.); (G.V.S.)
| | - Nikolay V. Bychin
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (N.A.S.); (E.A.S.); (A.E.K.); (E.K.G.); (N.V.B.); (Y.A.G.); (E.I.K.); (G.F.M.); (A.A.K.); (I.N.P.); (G.V.S.)
| | - Yulia A. Gismatulina
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (N.A.S.); (E.A.S.); (A.E.K.); (E.K.G.); (N.V.B.); (Y.A.G.); (E.I.K.); (G.F.M.); (A.A.K.); (I.N.P.); (G.V.S.)
| | - Ekaterina I. Kashcheyeva
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (N.A.S.); (E.A.S.); (A.E.K.); (E.K.G.); (N.V.B.); (Y.A.G.); (E.I.K.); (G.F.M.); (A.A.K.); (I.N.P.); (G.V.S.)
| | - Galina F. Mironova
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (N.A.S.); (E.A.S.); (A.E.K.); (E.K.G.); (N.V.B.); (Y.A.G.); (E.I.K.); (G.F.M.); (A.A.K.); (I.N.P.); (G.V.S.)
| | - Anna A. Korchagina
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (N.A.S.); (E.A.S.); (A.E.K.); (E.K.G.); (N.V.B.); (Y.A.G.); (E.I.K.); (G.F.M.); (A.A.K.); (I.N.P.); (G.V.S.)
| | - Igor N. Pavlov
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (N.A.S.); (E.A.S.); (A.E.K.); (E.K.G.); (N.V.B.); (Y.A.G.); (E.I.K.); (G.F.M.); (A.A.K.); (I.N.P.); (G.V.S.)
- Biysk Technological Institute, Polzunov Altai State Technical University, 659305 Biysk, Russia
| | - Gennady V. Sakovich
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), 659322 Biysk, Russia; (N.A.S.); (E.A.S.); (A.E.K.); (E.K.G.); (N.V.B.); (Y.A.G.); (E.I.K.); (G.F.M.); (A.A.K.); (I.N.P.); (G.V.S.)
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Olokede O, Hsu SC, Schiele S, Ju H, Holtzapple M. Assessment of shock pretreatment and alkali pretreatment on corn stover using enzymatic hydrolysis. Biotechnol Prog 2021; 38:e3217. [PMID: 34591371 DOI: 10.1002/btpr.3217] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 09/27/2021] [Accepted: 09/29/2021] [Indexed: 11/09/2022]
Abstract
This study investigates digestibility enhancements of lignocellulose from shock pretreatment, alkaline pretreatment, and combination. Shock pretreatment subjects aqueous slurries of lignocellulose to shock waves, which disrupts its structure rendering it more susceptible to hydrolysis. Alkaline pretreatment submerges the biomass in aqueous alkali (NaOH, Ca(OH)2 ), which removes lignin and acetyl groups. As indicators of digestibility, cellulase (CTec3) and hemicellulase (HTec3) were used to saccharify the pretreated corn stover and the resulting filtrate which contains about 10% of the sugars. Shock is most effective when it precedes alkaline pretreatment, presumably because it opens the biomass structure and enhances diffusion of pretreatment chemicals. Lignocellulose digestibility from calcium hydroxide treatment improves significantly with oxygen addition. In contrast, sodium hydroxide is a more potent alkali, and thereby eliminates the need for oxygen to enhance pretreatment. At low hydroxide loadings (<4 g OH- /100 g dry biomass), both NaOH and Ca(OH)2 provide similar increases in digestibility; however, at high hydroxide loadings, NaOH is superior. For animal feed, Ca(OH)2 treatment is recommended, because residual calcium ions are valuable nutrients. In contrast, for methane-arrested anaerobic digestion, NaOH treatment is preferred because NaHCO3 is a stronger buffer. At 50°C, shock pretreatment improves sugar yields at all NaOH loadings. The effect of shock is most pronounced when the no-shock control employed the same soaking-and-drying procedure as the shock treatment. The recommended conditions are shock treatment (5.52 bar [abs] initial H2 /O2 pressure) followed by 50°C alkaline treatment with NaOH loading of 4 g OH- /100 g dry biomass for 1 h.
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Affiliation(s)
- Opeyemi Olokede
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, USA
| | - Shen-Chun Hsu
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, USA
| | - Simon Schiele
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, USA
| | - Huang Ju
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, USA.,School of Material and Chemical Engineering, Xuzhou University of Technology, Xuzhou, Jiangsu, China
| | - Mark Holtzapple
- Artie McFerrin Department of Chemical Engineering, Texas A&M University, College Station, Texas, USA
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Zhang Q, Lu Z, Su C, Feng Z, Wang H, Yu J, Su W. High yielding, one-step mechano-enzymatic hydrolysis of cellulose to cellulose nanocrystals without bulk solvent. BIORESOURCE TECHNOLOGY 2021; 331:125015. [PMID: 33812135 DOI: 10.1016/j.biortech.2021.125015] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/12/2021] [Accepted: 03/13/2021] [Indexed: 06/12/2023]
Abstract
Traditional methods of enzymatic hydrolysis of cellulose to cellulose nanocrystals (CNCs) are limited due to the low enzymatic efficiency and large amount of waste liquid. The purpose of this study is to improve the yield and production efficiency of CNCs by enzymatic hydrolysis. A one-step mechano-enzymatic hydrolysis method was developed by utilizing the synergy of wet grinding and enzymatic hydrolysis reaction to efficiently prepare CNCs. Under the optimal reaction conditions, the maximum CNCs yield of 49.3% was achieved with higher thermal stability and crystallinity index of 76.7%. Mechano-enzymatic hydrolysis followed the first order pseudo-kinetics, and fractal kinetics demonstrated that mechanical force of rotation speed affected the fractal dimensions and binding ability between substrate and enzyme. This study provides an alternative method to prepare CNCs, which can significantly avoid the use of bulk water, improve the production efficiency of CNCs and thus lower the production cost.
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Affiliation(s)
- Qihong Zhang
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Zhaohui Lu
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Chen Su
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Zongmiao Feng
- Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Hui Wang
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Jingbo Yu
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, PR China
| | - Weike Su
- National Engineering Research Center for Process Development of Active Pharmaceutical Ingredients, Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou 310014, PR China; Key Laboratory for Green Pharmaceutical Technologies and Related Equipment of Ministry of Education, College of Pharmaceutical Sciences, Zhejiang University of Technology, Hangzhou 310014, PR China.
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Ahmadi-Asoori S, Tazikeh-Lemeski E, Mirabi A, Babanezhad E, Juybari MH. Preparation of nanocellulose modified with dithizone for separation, extraction and determination of trace amounts of manganese ions in industrial wastewater samples. Microchem J 2021. [DOI: 10.1016/j.microc.2020.105737] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Sorption of Methylene Blue for Studying the Specific Surface Properties of Biomass Carbohydrates. COATINGS 2020. [DOI: 10.3390/coatings10111115] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
The surface area is an important parameter in setting any biorefining technology. The aim of this study was to investigate the applicability of sorption of methylene blue to characterize the surface of the main biomass carbohydrates: α-cellulose, sigmacell cellulose, natural gum, β-glucan, and starch. The morphology of particles of the model objects was studied by scanning electron microscopy. Nitrogen adsorption isotherms demonstrate that the selected carbohydrates are macroporous adsorbents. The monolayer capacities, the energy constants of the Brunauer–Emmett–Teller (BET) equation, and specific surface areas were calculated using the BET theory, the comparative method proposed by Gregg and Sing, and the Harkins–Jura method. The method of methylene blue sorption onto biomass carbohydrates was adapted and mastered. It was demonstrated that sorption of methylene blue proceeds successfully in ethanol, thus facilitating surface characterization for carbohydrates that are either soluble in water or regain water. It was found that the methylene blue sorption values correlate with specific surface area determined by nitrogen adsorption/desorption and calculated from the granulometric data. As a result of electrostatic attraction, the presence of ion-exchanged groups on the analyte surface has a stronger effect on binding of methylene blue than the surface area does. Sorption of methylene blue can be used in addition to gas adsorption/desorption to assess the accessibility of carbohydrate surface for binding large molecules.
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10
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Can M, Demirci S, Sunol AK, Philippidis G, Sahiner N. Natural Celluloses as Catalysts in Dehydrogenation of NaBH 4 in Methanol for H 2 Production. ACS OMEGA 2020; 5:15519-15528. [PMID: 32637827 PMCID: PMC7331048 DOI: 10.1021/acsomega.0c01653] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Accepted: 06/04/2020] [Indexed: 06/11/2023]
Abstract
Cellulose, the most abundant renewable biopolymer, exists in many forms, such as microgranular cellulose (MGCell), sigmacell cellulose (SCell), cellulose fibers (FCell), and α-cellulose (AlfaCell). Several of these cellulose forms were protonated with an amine-containing agent polyethyleneimine (PEI), and the modified celluloses (XCell-PEI+) were studied as catalysts in methanolysis of NaBH4 for hydrogen (H2) generation. It was found that the SCell-PEI+-catalyzed reaction is the fastest one among the modified celluloses with a hydrogen generation rate of 5520 ± 119 mL H2/(g of catalyst × min). The activation energies of MGCell-PEI+, SCell-PEI+, FCell-PEI+, and AlfaCell-PEI+ were determined as +21.7, +23.4, +24.8, and + 21.8 kJ/mol, respectively. Reusability of catalysts was investigated, and regeneration of cellulose based catalysts after the fifth cycle could be readily achieved by HCl treatment to completely recover its activity. Therefore, PEI-modified-protonated cellulose forms constitute sustainable, re-generable, and renewable catalysts for production of H2, an environmentally benign green energy carrier.
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Affiliation(s)
- Mehmet Can
- Department
of Chemistry & Nanoscience and Technology Research and Application
Center, Canakkale Onsekiz Mart University
Terzioglu Campus, 17100 Canakkale, Turkey
| | - Sahin Demirci
- Department
of Chemistry & Nanoscience and Technology Research and Application
Center, Canakkale Onsekiz Mart University
Terzioglu Campus, 17100 Canakkale, Turkey
| | - Aydin K. Sunol
- Department
of Chemical and Biomedical Engineering, University of South Florida, Tampa, Florida 33620, United States
| | - George Philippidis
- Patel
College of Global Sustainability, University
of South Florida, 4202 E. Fowler Avenue, CGS101, Tampa, Florida 33620, United States
| | - Nurettin Sahiner
- Department
of Chemistry & Nanoscience and Technology Research and Application
Center, Canakkale Onsekiz Mart University
Terzioglu Campus, 17100 Canakkale, Turkey
- Department
of Chemical and Biomedical Engineering, University of South Florida, Tampa, Florida 33620, United States
- Department
of Ophthalmology, Morsani College of Medicine, University of South Florida, 12901 Bruce B Downs B. Downs Blv., MDC 21, Tampa, Florida 33612, United States
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Mironova GF, Skiba EA, Kukhlenko AA. Preparing Nutrient Media from Lignocellulose: Optimizing the Composition of a Multienzyme Compound. CATALYSIS IN INDUSTRY 2020. [DOI: 10.1134/s2070050420020063] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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12
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Baig KS. Interaction of enzymes with lignocellulosic materials: causes, mechanism and influencing factors. BIORESOUR BIOPROCESS 2020. [DOI: 10.1186/s40643-020-00310-0] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AbstractFor the production of biofuel (bioethanol), enzymatic adsorption onto a lignocellulosic biomass surface is a prior condition for the enzymatic hydrolysis process to occur. Lignocellulosic substances are mainly composed of cellulose, hemicellulose and lignin. The polysaccharide matrix (cellulose and hemicellulose) is capable of producing bioethanol. Therefore, lignin is removed or its concentration is reduced from the adsorption substrates by pretreatments. Selected enzymes are used for the production of reducing sugars from cellulosic materials, which in turn are converted to bioethanol. Adsorption of enzymes onto the substrate surface is a complicated process. A large number of research have been performed on the adsorption process, but little has been done to understand the mechanism of adsorption process. This article reviews the mechanisms of adsorption of enzymes onto the biomass surfaces. A conceptual adsorption mechanism is presented which will fill the gaps in literature and help researchers and industry to use adsorption more efficiently. The process of enzymatic adsorption starts with the reciprocal interplay of enzymes and substrates and ends with the establishment of molecular and cellular binding. The kinetics of an enzymatic reaction is almost the same as that of a characteristic chemical catalytic reaction. The influencing factors discussed in detail are: surface characteristics of the participating materials, the environmental factors, such as the associated flow conditions, temperature, concentration, etc. Pretreatment of lignocellulosic materials and optimum range of shear force and temperature for getting better results of adsorption are recommended.
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Kashcheyeva EI, Gismatulina YA, Budaeva VV. Pretreatments of Non-Woody Cellulosic Feedstocks for Bacterial Cellulose Synthesis. Polymers (Basel) 2019; 11:polym11101645. [PMID: 31658767 PMCID: PMC6835985 DOI: 10.3390/polym11101645] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/08/2019] [Accepted: 10/08/2019] [Indexed: 11/23/2022] Open
Abstract
Pretreatment of biomass is a key step in the production of valuable products, including high-tech bacterial cellulose. The efficiency of five different pretreatment methods of Miscanthus and oat hulls for enzymatic hydrolysis and subsequent synthesis of bacterial cellulose (BC) was evaluated herein: Hydrothermobaric treatment, single-stage treatments with dilute HNO3 or dilute NaOH solution, and two-stage combined treatment with dilute HNO3 and NaOH solutions in direct and reverse order. The performance of enzymatic hydrolysis of pretreatment products was found to increase by a factor of 4−7. All the resultant hydrolyzates were composed chiefly of glucose, as the xylose percentage in total reducing sugars (RS) was 1−9%. The test synthesis of BC demonstrated good quality of nutrient media prepared from all the enzymatic hydrolyzates, except the hydrothermobaric treatment hydrolyzate. For biosynthesis of BC, single-stage pretreatments with either dilute HNO3 or dilute NaOH are advised due their simplicity and the high performance of enzymatic hydrolysis of pretreatment products (RS yield 79.7−83.4%).
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Affiliation(s)
- Ekaterina I Kashcheyeva
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk 659322, Altai Krai, Russia.
| | - Yulia A Gismatulina
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk 659322, Altai Krai, Russia.
| | - Vera V Budaeva
- Bioconversion Laboratory, Institute for Problems of Chemical and Energetic Technologies, Siberian Branch of the Russian Academy of Sciences (IPCET SB RAS), Biysk 659322, Altai Krai, Russia.
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