1
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Saroj P, P M, Narasimhulu K. Enhanced reducing sugar production by blending hydrolytic enzymes from Aspergillus fumigatus to improve sugarcane bagasse hydrolysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34246-1. [PMID: 39017871 DOI: 10.1007/s11356-024-34246-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Accepted: 07/02/2024] [Indexed: 07/18/2024]
Abstract
Biomass pretreatment for the production of second-generation (2G) ethanol and biochemical products is a challenging process. The present study investigated the synergistic efficiency of purified carboxymethyl cellulase (CMCase), β-glucosidase, and xylanase from Aspergillus fumigatus JCM 10253 in the hydrolysis of alkaline-pretreated sugarcane bagasse (SCB). The saccharification of pretreated SCB was optimised using a combination of CMCase and β-glucosidase (C + β; 1:1) and addition of xylanase (C + β + xyl; 1:1:1). Independent and dependent variables influencing enzymatic hydrolysis were investigated using response surface methodology (RSM). Hydrolysis using purified CMCase and β-glucosidase achieved yields of 18.72 mg/mL glucose and 6.98 mg/mL xylose. Incorporation of xylanase in saccharification increased the titres of glucose (22.83 mg/mL) and xylose (9.54 mg/mL). Furthermore, characterisation of SCB biomass by scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectroscopy respectively confirmed efficient structural disintegration and revealed the degree of crystallinity and spectral characteristics. Therefore, depolymerisation of lignin to produce high-value chemicals is essential for sustainable and competitive biorefinery development.
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Affiliation(s)
- Paramjeet Saroj
- Department of Biotechnology, National Institute of Technology Warangal, Hanamkonda, 506004, Telangana, India.
| | - Manasa P
- Department of Biotechnology, National Institute of Technology Andhra Pradesh, Tadepalligudem, 534101, India
| | - Korrapati Narasimhulu
- Department of Biotechnology, National Institute of Technology Warangal, Hanamkonda, 506004, Telangana, India
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2
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Palliprath S, Poolakkalody NJ, Ramesh K, Mangalan SM, Kabekkodu SP, Santiago R, Manisseri C. Pretreatment of sugarcane postharvest leaves by γ-valerolactone/water/FeCl3 system for enhanced glucan and bioethanol production. INDUSTRIAL CROPS AND PRODUCTS 2023; 197:116571. [DOI: 10.1016/j.indcrop.2023.116571] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
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3
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Poolakkalody NJ, Ramesh K, Palliprath S, Nittoor SN, Santiago R, Kabekkodu SP, Manisseri C. Understanding triethylammonium hydrogen sulfate ([TEA][HSO]) pretreatment induced changes in Pennisetum polystachion cell wall matrix and its implications on biofuel yield. RENEWABLE ENERGY 2023; 209:420-430. [DOI: 10.1016/j.renene.2023.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/02/2024]
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4
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Kumar R, Basak B, Pal P, Chakrabortty S, Park YK, Ali Khan M, Chung W, Chang S, Ahn Y, Jeon BH. Feasibility assessment of bioethanol production from humic acid-assisted alkaline pretreated Kentucky bluegrass (Poa pratensis L.) followed by downstream enrichment using direct contact membrane distillation. BIORESOURCE TECHNOLOGY 2022; 360:127521. [PMID: 35760251 DOI: 10.1016/j.biortech.2022.127521] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 06/22/2022] [Accepted: 06/23/2022] [Indexed: 06/15/2023]
Abstract
The effective fractionation of structural components of abundantly available lignocellulosic biomass is essential to unlock its full biorefinery potential. In this study, the feasibility of humic acid on the pretreatment of Kentucky bluegrass biomass in alkaline condition was assessed to separate 70.1% lignin and hydrolyzable biocomponents. The humic acid-assisted delignification followed by enzymatic saccharification yielded 0.55 g/g of reducing sugars from 7.5% (w/v) pretreated biomass loading and 16 FPU/g of cellulase. Yeast fermentation of the biomass hydrolysate produced 76.6% (w/w) ethanol, which was subsequently separated and concentrated using direct contact membrane distillation. The hydrophobic microporous flat-sheet membrane housed in a rectangular-shaped crossflow module and counter-current mode of flow of the feed (hot) and distillate (cold) streams yielded a flux of 11.6 kg EtOH/m2/24 h. A modular, compact, flexible, and eco-friendly membrane-integrated hybrid approach is used for the first time to effectively valorize Kentucky bluegrass biomass for sustainable production of biofuel.
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Affiliation(s)
- Ramesh Kumar
- Department of Earth Resources & Environmental Engineering, Hanyang University, 222-Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Bikram Basak
- Department of Earth Resources & Environmental Engineering, Hanyang University, 222-Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea; Petroleum and Mineral Research Institute, Hanyang University, 222-Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Parimal Pal
- Department of Chemical Engineering, National Institute of Technology Durgapur, Mahatma Gandhi Avenue, Durgapur 713209, India
| | - Sankha Chakrabortty
- School of Chemical Technology, Kalinga Institute of Industrial Technology, Bhubaneswar 751024, India
| | - Young-Kwon Park
- School of Environmental Engineering, University of Seoul, Seoul 02504, Republic of Korea
| | - Moonis Ali Khan
- Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - WooJin Chung
- Department of Environmental Energy Engineering, Kyonggi University, Suwon 16227, Republic of Korea
| | - SoonWoong Chang
- Department of Environmental Energy Engineering, Kyonggi University, Suwon 16227, Republic of Korea
| | - Yongtae Ahn
- Department of Earth Resources & Environmental Engineering, Hanyang University, 222-Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea
| | - Byong-Hun Jeon
- Department of Earth Resources & Environmental Engineering, Hanyang University, 222-Wangsimni-ro, Seongdong-gu, Seoul 04763, Republic of Korea.
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5
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Brazkova M, Koleva R, Angelova G, Yemendzhiev H. Ligninolytic enzymes in Basidiomycetes and their application in xenobiotics degradation. BIO WEB OF CONFERENCES 2022. [DOI: 10.1051/bioconf/20224502009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Variety of microorganisms have already proven their capabilities for degradation of wide range of wastes with anthropogenic nature. These pollutants, both liquid and solids, also include so called xenobiotics like phenol and its derivatives, PAHs, dyes, pesticides, pharmaceuticals, etc. Xenobiotics as bisphenol A (BPA), chlorhexidine (CHX), octenidine (OCT), other disinfectants and antiseptics have high ecotoxicological impact. Moreover, they can also impair our quality of life and our health interfering different metabolic and hormone receptors pathways in human body. Chemical treatment of such wastes is not a viable option because of its poor socio-economics and environmental merits. Therefore, applying effective, ecofriendly and cheap treatment methods is of great importance. Basidiomycetes are extensively investigated for their abilities to degrade numerous pollutants and xenobiotics. Through their extracellular ligninolytic enzymes they are capable of reducing or completely removing wide range of hazardous compounds. These enzymes can be categorized in two groups: oxidases (laccase) and peroxidases (manganese peroxidase, lignin peroxidase, versatile peroxidase). Due to the broad substrate specificity of the secreted enzymes Basidiomycetes can be applied as a powerful tool for bioremediation of diverse xenobiotics and recalcitrant compounds.
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Saini S, Sharma KK. Fungal lignocellulolytic enzymes and lignocellulose: A critical review on their contribution to multiproduct biorefinery and global biofuel research. Int J Biol Macromol 2021; 193:2304-2319. [PMID: 34800524 DOI: 10.1016/j.ijbiomac.2021.11.063] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 10/27/2021] [Accepted: 11/10/2021] [Indexed: 01/15/2023]
Abstract
The continuous increase in the global energy demand has diminished fossil fuel reserves and elevated the risk of environmental deterioration and human health. Biorefinery processes involved in producing bio-based energy-enriched chemicals have paved way to meet the energy demands. Compared to the thermochemical processes, fungal system biorefinery processes seems to be a promising approach for lignocellulose conversion. It also offers an eco-friendly and energy-efficient route for biofuel generation. Essentially, ligninolytic white-rot fungi and their enzyme arsenals degrade the plant biomass into structural constituents with minimal by-products generation. Hemi- or cellulolytic enzymes from certain soft and brown-rot fungi are always favoured to hydrolyze complex polysaccharides into fermentable sugars and other value-added products. However, the cost of saccharifying enzymes remains the major limitation, which hinders their application in lignocellulosic biorefinery. In the past, research has been focused on the role of lignocellulolytic fungi in biofuel production; however, a cumulative study comprising the contribution of the lignocellulolytic enzymes in biorefinery technologies is still lagging. Therefore, the overarching goal of this review article is to discuss the major contribution of lignocellulolytic fungi and their enzyme arsenal in global biofuel research and multiproduct biorefinery.
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Affiliation(s)
- Sonu Saini
- Laboratory of Enzymology and Recombinant DNA Technology, Department of Microbiology, Maharshi Dayanand University, Rohtak 124001, Haryana, India
| | - Krishna Kant Sharma
- Laboratory of Enzymology and Recombinant DNA Technology, Department of Microbiology, Maharshi Dayanand University, Rohtak 124001, Haryana, India.
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Loi M, Glazunova O, Fedorova T, Logrieco AF, Mulè G. Fungal Laccases: The Forefront of Enzymes for Sustainability. J Fungi (Basel) 2021; 7:1048. [PMID: 34947030 PMCID: PMC8708107 DOI: 10.3390/jof7121048] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 11/30/2021] [Accepted: 12/04/2021] [Indexed: 01/22/2023] Open
Abstract
Enzymatic catalysis is one of the main pillars of sustainability for industrial production. Enzyme application allows minimization of the use of toxic solvents and to valorize the agro-industrial residues through reuse. In addition, they are safe and energy efficient. Nonetheless, their use in biotechnological processes is still hindered by the cost, stability, and low rate of recycling and reuse. Among the many industrial enzymes, fungal laccases (LCs) are perfect candidates to serve as a biotechnological tool as they are outstanding, versatile catalytic oxidants, only requiring molecular oxygen to function. LCs are able to degrade phenolic components of lignin, allowing them to efficiently reuse the lignocellulosic biomass for the production of enzymes, bioactive compounds, or clean energy, while minimizing the use of chemicals. Therefore, this review aims to give an overview of fungal LC, a promising green and sustainable enzyme, its mechanism of action, advantages, disadvantages, and solutions for its use as a tool to reduce the environmental and economic impact of industrial processes with a particular insight on the reuse of agro-wastes.
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Affiliation(s)
- Martina Loi
- Institute of Sciences of Food Production, National Research Council, Via Amendola 122/O, 70126 Bari, Italy; (M.L.); (A.F.L.)
| | - Olga Glazunova
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (O.G.); (T.F.)
| | - Tatyana Fedorova
- A.N. Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russia; (O.G.); (T.F.)
| | - Antonio F. Logrieco
- Institute of Sciences of Food Production, National Research Council, Via Amendola 122/O, 70126 Bari, Italy; (M.L.); (A.F.L.)
| | - Giuseppina Mulè
- Institute of Sciences of Food Production, National Research Council, Via Amendola 122/O, 70126 Bari, Italy; (M.L.); (A.F.L.)
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Malhotra M, Suman SK. Laccase-mediated delignification and detoxification of lignocellulosic biomass: removing obstacles in energy generation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:58929-58944. [PMID: 33712950 DOI: 10.1007/s11356-021-13283-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 03/01/2021] [Indexed: 06/12/2023]
Abstract
The rising global population and worldwide industrialization have led to unprecedented energy demand that is causing fast depletion of fossil reserves. This has led to search for alternative energy sources that are renewable and environment friendly. Use of lignocellulosic biomass for energy generation is considered a promising approach as it does not compete with food supply. However, the lignin component of the biomass acts as a natural barrier that prevents its efficient utilization. In order to remove the lignin and increase the amount of fermentable sugars, the lignocellulosic biomass is pretreated using physical and chemical methods which are costly and hazardous for environment. Moreover, during the traditional pretreatment process, numerous inhibitory compounds are generated that adversely affect the growth of fermentative microbes. Alternatively, biological methods that use microbes and their enzymes disrupt lignin polymers and increase the accessibility of the carbohydrates for the sugar generation. Microbial laccases have been considered as an efficient biocatalyst for delignification and detoxification offering a green initiative for energy generation process. The present review aims to bring together recent studies in bioenergy generation using laccase biocatalyst in the pretreatment processes. The work provides an overview of the sustainable and eco-friendly approach of biological delignification and detoxification through whole-cell and enzymatic methods, use of laccase-mediator system, and immobilized laccases for this purpose. It also summarizes the advantages, associated challenges, and potential prospects to overcome the limitations.
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Affiliation(s)
- Manisha Malhotra
- CSIR-Indian Institute of Petroleum, Mohkampur, Dehradun, 248005, India
| | - Sunil Kumar Suman
- CSIR-Indian Institute of Petroleum, Mohkampur, Dehradun, 248005, India.
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9
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Roy S, Dikshit PK, Sherpa KC, Singh A, Jacob S, Chandra Rajak R. Recent nanobiotechnological advancements in lignocellulosic biomass valorization: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 297:113422. [PMID: 34351298 DOI: 10.1016/j.jenvman.2021.113422] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 07/15/2021] [Accepted: 07/26/2021] [Indexed: 05/22/2023]
Abstract
Increase in human population, rapid industrialization, excessive utilization of fossil fuel utilization and anthropogenic activities have caused serious threats to the environment in terms of greenhouse gas emissions (GHGs), global warming, air pollution, acid rain, etc. This destruction in sustainability can be averted by a paradigm shift in the fuel production from fossil resources to bioenergy. Amongst different forms of bioenergy, lignocellulosic biomass can be utilized as an attractive substrate for the production of several high-value products owing to its renewability, easy availability, and abundance. Additionally, utilization of these waste biomasses reduces the environmental hazards associated with its disposal. Impedance of lignin and crystalline nature of cellulose pose major bottlenecks in biomass based energy. Though, several physio-chemicals processes are recommended as mitigation route but none of them seems to be promising for large scale application. In recent years, a right fusion of biological treatment combined with nanotechnology for efficient pretreatment and subsequent hydrolysis of biomass by ubiquitous enzymes seems to be promising alternative. In addition, to overcome these difficulties, nanotechnology-based methods have been recently adopted in catalytic valorization of lignocellulosic biomass. The present review has critically discussed the application of nano-biotechnology in lignocellulosic biomass valorization in terms of pretreatment and hydrolysis. A detailed discussion on the application of various nanoparticles in these processes, enzyme immobilization and end-production utilization is presented in this review. Finally, the review emphasizes the major challenges of this process along with different routes and recommendations to address the issues.
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Affiliation(s)
- Sharmili Roy
- Division of Oncology, School of Medicine, Stanford University, CA, 94305, USA
| | - Pritam Kumar Dikshit
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Greater Noida, 201310, India
| | - Knawang Chhunji Sherpa
- Advanced Technology Development Centre, Indian Institute of Technology, Kharagpur, 721302, India
| | - Anshu Singh
- Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur, 721302, India
| | - Samuel Jacob
- Department of Biotechnology, School of Engineering, SRM Institute of Science and Technology, Kattankulathur, India
| | - Rajiv Chandra Rajak
- Department of Botany, Marwari College, Ranchi University, Ranchi, 834008, India.
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10
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de Freitas EN, Alnoch RC, Contato AG, Nogueira KMV, Crevelin EJ, de Moraes LAB, Silva RN, Martínez CA, Polizeli MDLTM. Enzymatic Pretreatment with Laccases from Lentinus sajor-caju Induces Structural Modification in Lignin and Enhances the Digestibility of Tropical Forage Grass ( Panicum maximum) Grown under Future Climate Conditions. Int J Mol Sci 2021; 22:ijms22179445. [PMID: 34502353 PMCID: PMC8431176 DOI: 10.3390/ijms22179445] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 08/22/2021] [Accepted: 08/24/2021] [Indexed: 01/25/2023] Open
Abstract
Since laccase acts specifically in lignin, the major contributor to biomass recalcitrance, this biocatalyst represents an important alternative to the pretreatment of lignocellulosic biomass. Therefore, this study investigates the laccase pretreatment and climate change effects on the hydrolytic performance of Panicum maximum. Through a Trop-T-FACE system, P. maximum grew under current (Control (C)) and future climate conditions: elevated temperature (2 °C more than the ambient canopy temperature) combined with elevated atmospheric CO2 concentration(600 μmol mol−1), name as eT+eC. Pretreatment using a laccase-rich crude extract from Lentinus sajor caju was optimized through statistical strategies, resulting in an increase in the sugar yield of P. maximum biomass (up to 57%) comparing to non-treated biomass and enabling hydrolysis at higher solid loading, achieving up to 26 g L−1. These increments are related to lignin removal (up to 46%) and lignin hydrophilization catalyzed by laccase. Results from SEM, CLSM, FTIR, and GC-MS supported the laccase-catalyzed lignin removal. Moreover, laccase mitigates climate effects, and no significant differences in hydrolytic potential were found between C and eT+eC groups. This study shows that crude laccase pretreatment is a potential and sustainable method for biorefinery solutions and helped establish P. maximum as a promising energy crop.
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Affiliation(s)
- Emanuelle Neiverth de Freitas
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14049-900, Brazil; (E.N.d.F.); (A.G.C.); (K.M.V.N.); (R.N.S.)
| | - Robson Carlos Alnoch
- Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14050-901, Brazil; (R.C.A.); (C.A.M.)
| | - Alex Graça Contato
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14049-900, Brazil; (E.N.d.F.); (A.G.C.); (K.M.V.N.); (R.N.S.)
| | - Karoline Maria V. Nogueira
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14049-900, Brazil; (E.N.d.F.); (A.G.C.); (K.M.V.N.); (R.N.S.)
| | - Eduardo José Crevelin
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14050-901, Brazil; (E.J.C.); (L.A.B.d.M.)
| | - Luiz Alberto Beraldo de Moraes
- Departamento de Química, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14050-901, Brazil; (E.J.C.); (L.A.B.d.M.)
| | - Roberto Nascimento Silva
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14049-900, Brazil; (E.N.d.F.); (A.G.C.); (K.M.V.N.); (R.N.S.)
| | - Carlos Alberto Martínez
- Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14050-901, Brazil; (R.C.A.); (C.A.M.)
| | - Maria de Lourdes T. M. Polizeli
- Departamento de Bioquímica e Imunologia, Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14049-900, Brazil; (E.N.d.F.); (A.G.C.); (K.M.V.N.); (R.N.S.)
- Departamento de Biologia, Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto 14050-901, Brazil; (R.C.A.); (C.A.M.)
- Correspondence:
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Rajeswari G, Jacob S. Saccharolysis of laccase delignified
Aloe vera
leaf rind and fermentation through free and immobilized yeast for ethanol production. J FOOD PROCESS ENG 2020. [DOI: 10.1111/jfpe.13514] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gunasekaran Rajeswari
- Department of Biotechnology, School of Bioengineering SRM Institute of Science and Technology Kattankulathur Tamil Nadu India
| | - Samuel Jacob
- Department of Biotechnology, School of Bioengineering SRM Institute of Science and Technology Kattankulathur Tamil Nadu India
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12
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Gou Z, Ma NL, Zhang W, Lei Z, Su Y, Sun C, Wang G, Chen H, Zhang S, Chen G, Sun Y. Innovative hydrolysis of corn stover biowaste by modified magnetite laccase immobilized nanoparticles. ENVIRONMENTAL RESEARCH 2020; 188:109829. [PMID: 32798948 DOI: 10.1016/j.envres.2020.109829] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 06/10/2020] [Accepted: 06/11/2020] [Indexed: 05/22/2023]
Abstract
Intensive studies have been performed on the improvement of bioethanol production by transformation of lignocellulose biomass. In this study, the digestibility of corn stover was dramatically improved by using laccase immobilized on Cu2+ modified recyclable magnetite nanoparticles, Fe3O4-NH2. After digestion, the laccase was efficiently separated from slurry. The degradation rate of lignin reached 40.76%, and the subsequent cellulose conversion rate 38.37% for 72 h at 35 °C with cellulase at 50 U g-1 of corn stover. Compared to those of free and inactivated mode, the immobilized laccase pre-treatment increased subsequent cellulose conversion rates by 23.98% and 23.34%, respectively. Moreover, the reusability of immobilized laccase activity remained 50% after 6 cycles. The storage and thermal stability of the fixed laccase enhanced by 70% and 24.1% compared to those of free laccase at 65 °C, pH 4.5, respectively. At pH 10.5, it exhibited 16.3% more activities than its free mode at 35 °C. Our study provides a new avenue for improving the production of bioethanol with immobilized laccase for delignification using corn stover as the starting material.
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Affiliation(s)
- Zechang Gou
- Key Laboratory of Straw Biology and Utilization, Ministry of Education, College of Life Science, JiLin Agricultural University, Changchun, 130000, JiLin, China; Innovation Platform of Straw Comprehensive Utilization Technology in Jilin Province, Changchun, 130000, Jilin, China
| | - Nyuk Ling Ma
- Faculty of Science and Marine Environment, University Malaysia Terengganu, 21030, Kuala Nerus, Terengganu, China
| | - Wenqi Zhang
- Key Laboratory of Straw Biology and Utilization, Ministry of Education, College of Life Science, JiLin Agricultural University, Changchun, 130000, JiLin, China; Innovation Platform of Straw Comprehensive Utilization Technology in Jilin Province, Changchun, 130000, Jilin, China
| | - Zhipeng Lei
- Key Laboratory of Straw Biology and Utilization, Ministry of Education, College of Life Science, JiLin Agricultural University, Changchun, 130000, JiLin, China; Innovation Platform of Straw Comprehensive Utilization Technology in Jilin Province, Changchun, 130000, Jilin, China
| | - Yingjie Su
- Key Laboratory of Straw Biology and Utilization, Ministry of Education, College of Life Science, JiLin Agricultural University, Changchun, 130000, JiLin, China; Innovation Platform of Straw Comprehensive Utilization Technology in Jilin Province, Changchun, 130000, Jilin, China
| | - Chunyu Sun
- Key Laboratory of Straw Biology and Utilization, Ministry of Education, College of Life Science, JiLin Agricultural University, Changchun, 130000, JiLin, China; Innovation Platform of Straw Comprehensive Utilization Technology in Jilin Province, Changchun, 130000, Jilin, China
| | - Gang Wang
- Key Laboratory of Straw Biology and Utilization, Ministry of Education, College of Life Science, JiLin Agricultural University, Changchun, 130000, JiLin, China; Innovation Platform of Straw Comprehensive Utilization Technology in Jilin Province, Changchun, 130000, Jilin, China
| | - Huan Chen
- Key Laboratory of Straw Biology and Utilization, Ministry of Education, College of Life Science, JiLin Agricultural University, Changchun, 130000, JiLin, China; Innovation Platform of Straw Comprehensive Utilization Technology in Jilin Province, Changchun, 130000, Jilin, China
| | - Sitong Zhang
- Key Laboratory of Straw Biology and Utilization, Ministry of Education, College of Life Science, JiLin Agricultural University, Changchun, 130000, JiLin, China; Innovation Platform of Straw Comprehensive Utilization Technology in Jilin Province, Changchun, 130000, Jilin, China
| | - Guang Chen
- Key Laboratory of Straw Biology and Utilization, Ministry of Education, College of Life Science, JiLin Agricultural University, Changchun, 130000, JiLin, China; Innovation Platform of Straw Comprehensive Utilization Technology in Jilin Province, Changchun, 130000, Jilin, China
| | - Yang Sun
- Key Laboratory of Straw Biology and Utilization, Ministry of Education, College of Life Science, JiLin Agricultural University, Changchun, 130000, JiLin, China; Innovation Platform of Straw Comprehensive Utilization Technology in Jilin Province, Changchun, 130000, Jilin, China.
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13
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Rastogi A, Banerjee R. Statistical optimization of bacterial cellulose production by Leifsonia soli and its physico-chemical characterization. Process Biochem 2020. [DOI: 10.1016/j.procbio.2019.12.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Roth JCG, Hoeltz M, Benitez LB. Current approaches and trends in the production of microbial cellulases using residual lignocellulosic biomass: a bibliometric analysis of the last 10 years. Arch Microbiol 2020; 202:935-951. [DOI: 10.1007/s00203-019-01796-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 11/19/2019] [Accepted: 12/15/2019] [Indexed: 12/30/2022]
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Ligninolytic Enzymes Mediated Ligninolysis: An Untapped Biocatalytic Potential to Deconstruct Lignocellulosic Molecules in a Sustainable Manner. Catal Letters 2020. [DOI: 10.1007/s10562-019-03096-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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16
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Thite VS, Nerurkar AS. Valorization of sugarcane bagasse by chemical pretreatment and enzyme mediated deconstruction. Sci Rep 2019; 9:15904. [PMID: 31685856 PMCID: PMC6828687 DOI: 10.1038/s41598-019-52347-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2019] [Accepted: 10/05/2019] [Indexed: 11/09/2022] Open
Abstract
After chemical pretreatment, improved amenability of agrowaste biomass for enzymatic saccharification needs an understanding of the effect exerted by pretreatments on biomass for enzymatic deconstruction. In present studies, NaOH, NH4OH and H2SO4 pretreatments effectively changed visible morphology imparting distinct fibrous appearance to sugarcane bagasse (SCB). Filtrate analysis after NaOH, NH4OH and H2SO4 pretreatments yielded release of soluble reducing sugars (SRS) in range of ~0.17–0.44%, ~0.38–0.75% and ~2.9–8.4% respectively. Gravimetric analysis of pretreated SCB (PSCB) biomass also revealed dry weight loss in range of ~25.8–44.8%, ~11.1–16.0% and ~28.3–38.0% by the three pretreatments in the same order. Release of soluble components other than SRS, majorly reported to be soluble lignins, were observed highest for NaOH followed by H2SO4 and NH4OH pretreatments. Decrease or absence of peaks attributed to lignin and loosened fibrous appearance of biomass during FTIR and SEM studies respectively further corroborated with our observations of lignin removal. Application of commercial cellulase increased raw SCB saccharification from 1.93% to 38.84%, 25.56% and 9.61% after NaOH, H2SO4 and NH4OH pretreatments. Structural changes brought by cell wall degrading enzymes were first time shown visually confirming the cell wall disintegration under brightfield, darkfield and fluorescence microscopy. The microscopic evidence and saccharification results proved that the chemical treatment valorized the SCB by making it amenable for enzymatic saccharification.
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Affiliation(s)
- Vihang S Thite
- Department of Microbiology and Biotechnology Centre, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, 390002, India.
| | - Anuradha S Nerurkar
- Department of Microbiology and Biotechnology Centre, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara, Gujarat, 390002, India.
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17
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Behbahani M, Nosrati M, Moradi M, Mohabatkar H. Using Chou's General Pseudo Amino Acid Composition to Classify Laccases from Bacterial and Fungal Sources via Chou's Five-Step Rule. Appl Biochem Biotechnol 2019; 190:1035-1048. [PMID: 31659712 DOI: 10.1007/s12010-019-03141-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Accepted: 09/12/2019] [Indexed: 01/28/2023]
Abstract
Laccases are a group of enzymes with a critical activity in the degradation process of both phenolic and non-phenolic compounds. These enzymes present in a diverse array of species, including fungi and bacteria. Since this enzyme is in the market for different usages from industry to medicine, having a better knowledge of its structures and properties from diverse sources will be useful to select the most appropriate candidate for different purposes. In the current study, sequence- and structure-based characteristics of these enzymes from fungi and bacteria, including pseudo amino acid composition (PseAAC), physicochemical characteristics, and their secondary structures, are being compared and classified. Autodock 4 software was used for docking analysis between these laccases and some phenolic and non-phenolic compounds. The results indicated that features including molecular weight, aliphatic, extinction coefficient, and random coil percentage of these protein groups present high degrees of diversity in most cases. Categorization of these enzymes by the notion of PseAAC, showed over 96% accuracy. The binding free energy between fungal laccases and their substrates showed to be considerably higher than those of bacterial ones. According to the outcomes of the current study, data mining methods by using different machine learning algorithms, especially neural networks, could provide valuable information for a fair comparison between fungal and bacterial laccases. These results also suggested an association between efficacy and physicochemical features of laccase enzymes from different sources.
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Affiliation(s)
- Mandana Behbahani
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Mokhtar Nosrati
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Mohammad Moradi
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran
| | - Hassan Mohabatkar
- Department of Biotechnology, Faculty of Biological Science and Technology, University of Isfahan, Isfahan, Iran.
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19
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Giacobbe S, Pezzella C, Lettera V, Sannia G, Piscitelli A. Laccase pretreatment for agrofood wastes valorization. BIORESOURCE TECHNOLOGY 2018; 265:59-65. [PMID: 29883847 DOI: 10.1016/j.biortech.2018.05.108] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 05/29/2018] [Accepted: 05/30/2018] [Indexed: 05/27/2023]
Abstract
Apple pomace, potato peels, and coffee silverskin are attractive agrofood wastes for the production of biofuels and chemicals, due to their abundance and carbohydrate content. As lignocellulosic biomasses, their conversion is challenged by the presence of lignin that prevents hydrolysis of polysaccharides, hence demanding a pretreatment step. In this work, the effectiveness of Pleurotus ostreatus laccases (with and without mediator) to remove lignin, improving the subsequent saccharification, was assessed. Optimized conditions for sequential protocol were set up for all agrofood wastes reaching delignification and detoxification yields correlated with high saccharification. Especially noteworthy were results for apple pomace and coffee silverskin for which 83% of and 73% saccharification yields were observed, by using laccase and laccase mediator system, respectively. The herein developed sequential protocol, saving soluble sugars and reducing the amount of wastewater, can improve the overall process for obtaining chemicals or fuels from agrofood wastes.
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Affiliation(s)
| | - Cinzia Pezzella
- Biopox srl, Via Salita Arenella 9, Naples, Italy; Dipartimento di Scienze Chimiche, Università di Napoli "Federico II", Via Cintia 4, 80126 Naples, Italy
| | | | - Giovanni Sannia
- Biopox srl, Via Salita Arenella 9, Naples, Italy; Dipartimento di Scienze Chimiche, Università di Napoli "Federico II", Via Cintia 4, 80126 Naples, Italy
| | - Alessandra Piscitelli
- Biopox srl, Via Salita Arenella 9, Naples, Italy; Dipartimento di Scienze Chimiche, Università di Napoli "Federico II", Via Cintia 4, 80126 Naples, Italy.
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20
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Mohapatra S, Padhy S, Das Mohapatra PK, Thatoi HN. Enhanced reducing sugar production by saccharification of lignocellulosic biomass, Pennisetum species through cellulase from a newly isolated Aspergillus fumigatus. BIORESOURCE TECHNOLOGY 2018; 253:262-272. [PMID: 29353755 DOI: 10.1016/j.biortech.2018.01.023] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 01/04/2018] [Accepted: 01/05/2018] [Indexed: 06/07/2023]
Abstract
A cellulose degrading fungus Aspergillus fumigatus (CWSF-7) isolated from decomposed lignocellulosic waste containing soil was found to produce high titer of cellulases. The optimum activity of CMCase and FPase were 1.9 U/mL and 0.9 U/mL respectively while the highest protein concentration was found to be 1.2 mg/mL. Saccharification of two Pennisetum grass varieties [dennanath (DG) and hybrid napier grass (HNG)] were optimized using partially purified CMCase and FPase in equal concentration, i.e. a ratios of 1:1 and further with addition of commercial xylanase using response surface methodology (RSM). The production of total reducing sugar (TRS) using isolated cellulase were 396.6 and 355.8 (mg/g), whereas further addition of xylanase had higher TRS titers of 478.7 and 483.3 (mg/g) for DG and HNG respectively as evident from HPLC analysis. Further, characterization of the enzyme saccharified DG and HNG by SEM and ATR-FTIR revealed efficient hydrolysis of cellulose and partially hydrolysis of hemicellulose.
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Affiliation(s)
- Sonali Mohapatra
- Department of Biotechnology, College of Engineering and Technology, Biju Pattnaik University of Technology, Bhubaneswar 751003, India
| | - Sameer Padhy
- Department of Biotechnology, College of Engineering and Technology, Biju Pattnaik University of Technology, Bhubaneswar 751003, India
| | | | - H N Thatoi
- Department of Biotechnology, North Orissa University, Sriram Chandra vihar, Takatpur, Baripada 757003, Odisha, India
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Bilal M, Iqbal HM, Hu H, Wang W, Zhang X. Metabolic engineering and enzyme-mediated processing: A biotechnological venture towards biofuel production – A review. RENEWABLE & SUSTAINABLE ENERGY REVIEWS 2018. [DOI: 10.1016/j.rser.2017.09.070] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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22
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Althuri A, Gujjala LKS, Banerjee R. Partially consolidated bioprocessing of mixed lignocellulosic feedstocks for ethanol production. BIORESOURCE TECHNOLOGY 2017; 245:530-539. [PMID: 28898853 DOI: 10.1016/j.biortech.2017.08.140] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 08/21/2017] [Accepted: 08/22/2017] [Indexed: 06/07/2023]
Abstract
Rapid urbanization and industrialization have accelerated the energy demand which cannot be met by decreasing fossil fuels thereby substantiate the need for lignocellulosic ethanol. The present study is one such attempt towards bioethanol production in an eco-friendly manner using enzymes in which a mixture of lignocellulosic biomass namely, Ricinus communis, Saccharum officinarum (tops) and Saccharum spontaneum were taken as a substrate. The mixed biomass was processed through partially consolidated bioprocessing (PCBP) approach which involves a non-isothermal simultaneous pretreatment and saccharification step where a concoction of laccase (Pleurotus djamor) and holocellulase (Trichoderma reseei RUT C30) was used followed by co-fermentation within the same reactor. The process parameters influencing PCBP were optimized using feed-forward ANN model which resulted in a maximum ethanol concentration of 7.86% (v/v) (62.01g/L) at pentose to hexose strain ratio of 0.696 (v/v), substrate loading of 27.54% (w/v) and incubation time of 21.96h.
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Affiliation(s)
- Avanthi Althuri
- Advanced Technology Development Centre, Indian Institute of Technology, Kharagpur 721 302, India
| | | | - Rintu Banerjee
- Agricultural & Food Engineering Department, Indian Institute of Technology, Kharagpur 721 302, India; Advanced Technology Development Centre, Indian Institute of Technology, Kharagpur 721 302, India.
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Laccases as a Potential Tool for the Efficient Conversion of Lignocellulosic Biomass: A Review. FERMENTATION-BASEL 2017. [DOI: 10.3390/fermentation3020017] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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