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Saharan BS, Dhanda D, Mandal NK, Kumar R, Sharma D, Sadh PK, Jabborova D, Duhan JS. Microbial contributions to sustainable paddy straw utilization for economic gain and environmental conservation. CURRENT RESEARCH IN MICROBIAL SCIENCES 2024; 7:100264. [PMID: 39205828 PMCID: PMC11350505 DOI: 10.1016/j.crmicr.2024.100264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024] Open
Abstract
Paddy straw is a versatile and valuable resource with multifaceted benefits for nutrient cycling, soil health, and climate mitigation. Its role as a rich nutrient source and organic matter significantly enhances soil vitality while improving soil structure and moisture retention. The impact of paddy straw extends beyond traditional agricultural benefits, encompassing the promotion of microbial activity, erosion control, and carbon sequestration, highlighting its crucial role in maintaining ecological balance. Furthermore, the potential of paddy straw in bioenergy is explored, encompassing its conversion into biogas, biofuels, and thermal energy. The inherent characteristics of paddy straw, including its high cellulose, hemicellulose, and lignin content, position it as a viable candidate for bioenergy production through innovative processes like pyrolysis, gasification, anaerobic digestion, and combustion. Recent research has uncovered state-of-the-art techniques and innovative technologies capable of converting paddy straw into valuable products, including sugar, ethanol, paper, and fiber, broadening its potential applications. This paper aims to underscore the possibilities for value creation through paddy straw, emphasizing its potential use in bioenergy, bio-products, and other environmental applications. Therefore, by recognizing and harnessing the value of paddy straw, we can advocate for sustainable farming practices, reduce waste, and pave the way for a resource-efficient circular economy. Incorporating paddy straw utilization into agricultural systems can pave the way for enhanced resource efficiency and a more sustainable circular economy.
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Affiliation(s)
- Baljeet Singh Saharan
- Department of Microbiology, Chaudhary Charan Singh Haryana Agricultural University, Hisar, 125004, India
- Department of Botany and Plant Physiology (Environmental Science), Chaudhary Charan Singh Haryana Agricultural University, Hisar, 125004, India
| | - Deepika Dhanda
- Department of Microbiology, Chaudhary Charan Singh Haryana Agricultural University, Hisar, 125004, India
- Department of Botany and Plant Physiology (Environmental Science), Chaudhary Charan Singh Haryana Agricultural University, Hisar, 125004, India
| | - Neelam Kumari Mandal
- Department of Botany, Government P.G. College, Panchkula, Haryana, 134112, India
| | - Ramesh Kumar
- Agriculture Extension, Krishi Vigyan Kendra, Ambala, 133104, India
| | - Deepansh Sharma
- Department of Life Sciences, J C Bose University of Science and Technology, YMCA, Faridabad, 121006, India
| | - Pardeep Kumar Sadh
- Department of Biotechnology, Chaudhary Devi Lal University, Sirsa, 125055, India
| | - Dilfuza Jabborova
- Institute of Genetics and Plant Experimental Biology, Uzbekistan Academy of Sciences, Kibray 111208, Uzbekistan
| | - Joginder Singh Duhan
- Department of Biotechnology, Chaudhary Devi Lal University, Sirsa, 125055, India
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Kumar N, Yadav A, Singh G, Singh A, Kumar P, Aggarwal NK. Comparative study of ethanol production from sodium hydroxide pretreated rice straw residue using Saccharomyces cerevisiae and Zymomonas mobilis. Arch Microbiol 2023; 205:146. [PMID: 36971832 DOI: 10.1007/s00203-023-03468-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Revised: 02/23/2023] [Accepted: 03/04/2023] [Indexed: 03/29/2023]
Abstract
Rice straw is a suitable alternative to a cheaper carbohydrate source for the production of ethanol. For pretreatment efficiency, different sodium hydroxide concentrations (0.5-2.5% w/v) were tested. When compared to other concentrations, rice straw processed with 2% NaOH (w/v) yielded more sugar (8.17 ± 0.01 mg/ml). An alkali treatment induces effective delignification and swelling of biomass. The pretreatment of rice straw with 2% sodium hydroxide (w/v) is able to achieve 55.34% delignification with 53.30% cellulose enrichment. The current study shows the effectiveness of crude cellulolytic preparation from Aspergillus niger resulting in 80.51 ± 0.4% cellulose hydrolysis. Rice straw hydrolysate was fermented using ethanologenic Saccharomyces cerevisiae (yeast) and Zymomonas mobilis (bacteria). Overall, superior efficiency of sugar conversion to ethanol 70.34 ± 0.3% was obtained with the yeast compared to bacterial strain 39.18 ± 0.5%. The current study showed that pretreatment with sodium hydroxide is an effective method for producing ethanol from rice straw and yeast strain S. cerevisiae having greater fermentative potential for bioethanol production than bacterial strain Z. mobilis.
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Affiliation(s)
- Naveen Kumar
- Laboratory of Fermentation Technology, Department of Microbiology, Kurukshetra University, Kurukshetra, Haryana, 136119, India
| | - Anita Yadav
- Department of Biotechnology, Kurukshetra University, Kurukshetra, Haryana, 136119, India
| | - Gulab Singh
- Department of Biotechnology, Maharaja Agrasen University, Baddi, Himachal Pradesh, 174103, India
| | - Ajay Singh
- Department of Food Technology, Mata Gujri College, Fatehgarh Sahib, Punjab, 140406, India
| | - Pankaj Kumar
- Department of Microbiology, Dolphin (PG) Institute of Biomedical and Natural Sciences, Dehradun, Uttarakhand, 248007, India.
| | - Neeraj K Aggarwal
- Laboratory of Fermentation Technology, Department of Microbiology, Kurukshetra University, Kurukshetra, Haryana, 136119, India.
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Shukla A, Kumar D, Girdhar M, Kumar A, Goyal A, Malik T, Mohan A. Strategies of pretreatment of feedstocks for optimized bioethanol production: distinct and integrated approaches. BIOTECHNOLOGY FOR BIOFUELS AND BIOPRODUCTS 2023; 16:44. [PMID: 36915167 PMCID: PMC10012730 DOI: 10.1186/s13068-023-02295-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 03/02/2023] [Indexed: 03/14/2023]
Abstract
Bioethanol is recognized as a valuable substitute for renewable energy sources to meet the fuel and energy demand of the nation, considered an environmentally friendly resource obtained from agricultural residues such as sugarcane bagasse, rice straw, husk, wheat straw and corn stover. The energy demand is sustained using lignocellulosic biomass to produce bioethanol. Lignocellulosic biomass (LCBs) is the point of attention in replacing the dependence on fossil fuels. The recalcitrant structure of the lignocellulosic biomass is disrupted using effective pretreatment techniques that separate complex interlinked structures among cellulose, hemicellulose, and lignin. Pretreatment of biomass involves various physical, chemical, biological, and physiochemical protocols which are of importance, dependent upon their individual or combined dissolution effect. Physical pretreatment involves a reduction in the size of the biomass using mechanical, extrusion, irradiation, and sonification methods while chemical pretreatment involves the breaking of various bonds present in the LCB structure. This can be obtained by using an acidic, alkaline, ionic liquid, and organosolvent methods. Biological pretreatment is considered an environment-friendly and safe process involving various bacterial and fungal microorganisms. Distinct pretreatment methods, when combined and utilized in synchronization lead to more effective disruption of LCB, making biomass more accessible for further processing. These could be utilized in terms of their effectiveness for a particular type of cellulosic fiber and are namely steam explosion, liquid hot water, ammonia fibre explosion, CO2 explosion, and wet air oxidation methods. The present review encircles various distinct and integrated pretreatment processes developed till now and their advancement according to the current trend and future aspects to make lignocellulosic biomass available for further hydrolysis and fermentation.
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Affiliation(s)
- Akanksha Shukla
- School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, 144411, India
| | - Deepak Kumar
- School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, 144411, India
| | - Madhuri Girdhar
- School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, 144411, India
| | - Anil Kumar
- Gene Regulation Laboratory, National Institute of Immunology, New Delhi, 110067, India
| | - Abhineet Goyal
- SAGE School of Science, SAGE University Bhopal, Sahara Bypass Road Katara Hills, Extension, Bhopal, Madhya Pradesh, 462022, India
| | - Tabarak Malik
- Department of Biomedical Sciences, Institute of Health, Jimma University, Jimma, Ethiopia.
| | - Anand Mohan
- School of Bioengineering and Biosciences, Lovely Professional University, Phagwara, 144411, India.
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Chen S, Davaritouchaee M. Nature-inspired pretreatment of lignocellulose - Perspective and development. BIORESOURCE TECHNOLOGY 2023; 369:128456. [PMID: 36503090 DOI: 10.1016/j.biortech.2022.128456] [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: 09/30/2022] [Revised: 12/02/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
As sustainability gains increasing importance in addition to cost-effectiveness as a criterion for evaluating engineering systems and practices, biological processes for lignocellulose pretreatment have attracted growing attention. Biological systems such as white and brown rot fungi and wood-consuming insects offer fascinating examples of processes and systems built by nature to effectively deconstruct plant cell walls under environmentally benign and energy-conservative environments. Research in the last decade has resulted in new knowledge that advanced the understanding of these systems, provided additional insights into these systems' functional mechanisms, and demonstrated various applications of these processes. The new knowledge and insights enable the adoption of a nature-inspired strategy aiming at developing technologies that are informed by the biological systems but superior to them by overcoming the inherent weakness of the natural systems. This review discusses the nature-inspired perspective and summarizes related advancements, including the evolution from biological systems to nature-inspired processes, the features of biological pretreatment mechanisms, the development of nature-inspired pretreatment processes, and future perspective. This work aims to highlight a different strategy in the research and development of novel lignocellulose pretreatment processes and offer some food for thought.
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Affiliation(s)
- Shulin Chen
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164, USA.
| | - Maryam Davaritouchaee
- Department of Biological Systems Engineering, Washington State University, Pullman, WA 99164, USA
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Assessment of the Pretreatments and Bioconversion of Lignocellulosic Biomass Recovered from the Husk of the Cocoa Pod. ENERGIES 2022. [DOI: 10.3390/en15103544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The production of biofuels (biogas, ethanol, methanol, biodiesel, and solid fuels, etc.), beginning with cocoa pod husk (CPH), is a way for obtaining a final product from the use of the principal waste product of the cocoa industry. However, there are limitations to the bioconversion of the material due to its structural components (cellulose, hemicellulose, and lignin). Currently, CPH pretreatment methods are considered a good approach towards the improvement of both the degradation process and the production of biogas or ethanol. The present document aims to set out the different methods for pretreating lignocellulosic material, which are: physical (grinding and extrusion, among others); chemical (acids and alkaline); thermochemical (pyrolysis); ionic liquid (salts); and biological (microorganism) to improve biofuel production. The use of CPH as a substrate in bioconversion processes is a viable and promising option, despite the limitations of each pretreatment method.
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Prasongsuk S, Bankeeree W, Lotrakul P, Abd‐Aziz S, Punnapayak H. Biological Pretreatment of Lignocellulosic Biomass. BIOREFINERY OF OIL PRODUCING PLANTS FOR VALUE‐ADDED PRODUCTS 2022:161-177. [DOI: 10.1002/9783527830756.ch9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Kalia S, Bhattacharya A, Prajapati SK, Malik A. Utilization of starch effluent from a textile industry as a fungal growth supplement for enhanced α-amylase production for industrial application. CHEMOSPHERE 2021; 279:130554. [PMID: 33873067 DOI: 10.1016/j.chemosphere.2021.130554] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Revised: 03/19/2021] [Accepted: 04/07/2021] [Indexed: 06/12/2023]
Abstract
Desizing process in textile industry produces large volume of starch effluent. This carbon-rich waste can be used for resource recovery, such as the production of industrially useful enzymes. The present work assesses the usability of starch effluent from textile industry as an additional carbon source for enhanced production of α-amylase during solid-state fermentation (SSF) of agro-wastes by Trichoderma reesei. A significant increase (p ≤ 0.05) in α-amylase activity (25.48 ± 1.12 U mL-1) was observed with supplementation of starch effluent in SSF. Partial purification of α-amylase by 80% ammonium sulphate precipitation produced a yield of 58.39% enzyme with purification fold of 1.89. The enzyme was thermally stable at 40 °C with 90% residual activity after 5 h and 70% residual activity at 50 °C after 3 h. Using Michaelis-Menten kinetics analysis, the estimated Km and Vmax values for the partially purified α-amylase were found to be 2.55 mg mL-1 and 53.47 U mg-1, respectively. For the rapid assessment of the industrial application, desizing of the fabric was attempted. The cotton fabric was efficiently desized using α-amylase (at a concentration of 1% on the weight of fabric basis) at 80 °C. The present work demonstrates starch effluent from desizing process as a resource for the production of amylase. The amylase can further be used in the desizing process. With in-depth research, the work may lead to the development of a closed-loop, waste-recycling process for the textile industry.
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Affiliation(s)
- Shweta Kalia
- Applied Microbiology Lab, Centre for Rural Development and Technology, Indian Institute of Technology Delhi, 110016, India.
| | - Arghya Bhattacharya
- Applied Microbiology Lab, Centre for Rural Development and Technology, Indian Institute of Technology Delhi, 110016, India; Department of Biotechnology, Gandhi Institute of Engineering and Technology University, Gunupur, Odisha, 765022, India.
| | - Sanjeev Kumar Prajapati
- Environment and Biofuel Research Lab, Department of Hydro and Renewable Energy, Indian Institute of Technology, Roorkee, Uttarakhand, 247667, India.
| | - Anushree Malik
- Applied Microbiology Lab, Centre for Rural Development and Technology, Indian Institute of Technology Delhi, 110016, India.
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Hans M, Lugani Y, Chandel AK, Rai R, Kumar S. Production of first- and second-generation ethanol for use in alcohol-based hand sanitizers and disinfectants in India. BIOMASS CONVERSION AND BIOREFINERY 2021; 13:1-18. [PMID: 34075327 PMCID: PMC8155184 DOI: 10.1007/s13399-021-01553-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2021] [Revised: 04/27/2021] [Accepted: 04/27/2021] [Indexed: 06/12/2023]
Abstract
Emergence of "severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2)" causing "COVID-19" or "coronavirus disease 19" as pandemic has got worldwide attention towards hygiene as the first line of defense for the infection control. It is first line of defense not only from COVID-19 but also from other infectious diseases caused by deadly pathogens such as cholera, hepatitis, tuberculosis, polio, etc. Absence of any particular vaccine or treatment let World Health Organization (WHO) recommend to the public to maintain social distancing along with regularly washing their hands with soap, sanitize their hands (where washing is not possible), and disinfect their belongings and buildings to avoid the infection. Out of various formulations available in the market, WHO has recommended alcohol-based hand sanitizers, which mainly comprise of ethanol, isopropyl alcohols, and hydrogen peroxides in different combinations due to their high potential to kill the broad range of pathogens including bacterial, viral, fungal, helminthes, etc. Therefore, alcohol-based sanitizers are in high demand since centuries to prevent infection from pathogenic diseases. Ethanol is the most common and popular alcohol in terms of vanishing wide range of pathogens, convenient to use and its production. Ethanol is produced worldwide and is used in various sectors, e.g., beauty and cosmetics, food and beverages, and as the most demanding gasoline additive. The present review is focused on the ethanol production in India, its diversified applications emphasizing hand sanitizers with discussions on formulation of sanitizer and disinfectants, and viability of lignocellulosic and food grain-based ethanol. The review article also emphasizes on the technological details of 1G and 2G ethanol production, their associated challenges, and inputs for the improved ethanol yields so as to strengthen the supply chain of ethanol in India, and making "Atmanirbhar Bharat" (Self-reliant India) campaign of Indian government successfully viable.
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Affiliation(s)
- Meenu Hans
- Biochemical Conversion Division, Sardar Swaran Singh National Institute of Bio-Energy, Jalandhar-Kapurthala Road, Wadala Kalan, Kapurthala, Punjab 144601 India
- Department of Microbiology, Guru Nanak Dev University, Amritsar, Punjab 143005 India
| | - Yogita Lugani
- Department of Agriculture and Environmental Sciences, National Institute of Food Technology Entrepreneurship and Management (NIFTEM), Sonepat, Haryana 131028 India
| | - Anuj K. Chandel
- Department of Biotechnology, Engineering School of Lorena (EEL), University of São Paulo, Lorena, SP Brazil
| | - Rohit Rai
- Faculty of Applied Medical Sciences, Lovely Professional University, Phagwara, Punjab 144411 India
| | - Sachin Kumar
- Biochemical Conversion Division, Sardar Swaran Singh National Institute of Bio-Energy, Jalandhar-Kapurthala Road, Wadala Kalan, Kapurthala, Punjab 144601 India
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Patel A, Shah AR. Integrated lignocellulosic biorefinery: Gateway for production of second generation ethanol and value added products. JOURNAL OF BIORESOURCES AND BIOPRODUCTS 2021. [DOI: 10.1016/j.jobab.2021.02.001] [Citation(s) in RCA: 79] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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Patiño MA, Ortiz JP, Velásquez M, Stambuk BU. d-Xylose consumption by nonrecombinant Saccharomyces cerevisiae: A review. Yeast 2019; 36:541-556. [PMID: 31254359 DOI: 10.1002/yea.3429] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 06/02/2019] [Accepted: 06/21/2019] [Indexed: 01/24/2023] Open
Abstract
Xylose is the second most abundant sugar in nature. Its efficient fermentation has been considered as a critical factor for a feasible conversion of renewable biomass resources into biofuels and other chemicals. The yeast Saccharomyces cerevisiae is of exceptional industrial importance due to its excellent capability to ferment sugars. However, although S. cerevisiae is able to ferment xylulose, it is considered unable to metabolize xylose, and thus, a lot of research has been directed to engineer this yeast with heterologous genes to allow xylose consumption and fermentation. The analysis of the natural genetic diversity of this yeast has also revealed some nonrecombinant S. cerevisiae strains that consume or even grow (modestly) on xylose. The genome of this yeast has all the genes required for xylose transport and metabolism through the xylose reductase, xylitol dehydrogenase, and xylulokinase pathway, but there seems to be problems in their kinetic properties and/or required expression. Self-cloning industrial S. cerevisiae strains overexpressing some of the endogenous genes have shown interesting results, and new strategies and approaches designed to improve these S. cerevisiae strains for ethanol production from xylose will also be presented in this review.
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Affiliation(s)
- Margareth Andrea Patiño
- Instituto de Biotecnología.,Departamento de Ingeniería Química y Ambiental, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Juan Pablo Ortiz
- Facultad de Ciencias e Ingeniería, Universidad de Boyacá, Tunja, Colombia
| | - Mario Velásquez
- Departamento de Ingeniería Química y Ambiental, Universidad Nacional de Colombia, Bogotá, Colombia
| | - Boris U Stambuk
- Departamento de Bioquímica, Universidad Federal de Santa Catarina, Florianópolis, Brazil
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Antunes FAF, Chandel AK, Terán-Hilares R, Ingle AP, Rai M, Dos Santos Milessi TS, da Silva SS, Dos Santos JC. Overcoming challenges in lignocellulosic biomass pretreatment for second-generation (2G) sugar production: emerging role of nano, biotechnological and promising approaches. 3 Biotech 2019; 9:230. [PMID: 31139545 DOI: 10.1007/s13205-019-1761-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 05/13/2019] [Indexed: 01/12/2023] Open
Abstract
Production of green chemicals and biofuels in biorefineries is the potential alternative for petrochemicals and gasoline in transitioning of petro-economy into bioeconomy. However, an efficient biomass pretreatment process must be considered for the successful deployment of biorefineries, mainly for use of lignocellulosic raw materials. However, biomass recalcitrance plays a key role in its saccharification to obtain considerable sugar which can be converted into ethanol or other biochemicals. In the last few decades, several pretreatment methods have been developed, but their feasibility at large-scale operations remains as a persistent bottleneck in biorefineries. Pretreatment methods such as hydrodynamic cavitation, ionic liquids, and supercritical fluids have shown promising results in terms of either lignin or hemicellulose removal, thus making remaining carbohydrate fraction amenable to the enzymatic hydrolysis for clean and high amount of fermentable sugar production. However, their techno-economic feasibility at industrial scale has not been yet studied in detail. Besides, nanotechnological-based technologies could play an important role in the economically viable 2G sugar production in future. Considering these facts, in the present review, we have discussed the existing promising pretreatment methods for lignocellulosic biomass and their challenges, besides this strategic role of nano and biotechnological approaches towards the viability and sustainability of biorefineries is also discussed.
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Affiliation(s)
- Felipe Antonio Fernandes Antunes
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
| | - Anuj Kumar Chandel
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
| | - Ruly Terán-Hilares
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
| | - Avinash P Ingle
- 3Nanotechnology Laboratory, Department of Biotechnology, SGB Amravati University, Amravati, 444 602 India
| | - Mahendra Rai
- 3Nanotechnology Laboratory, Department of Biotechnology, SGB Amravati University, Amravati, 444 602 India
| | | | - Silvio Silvério da Silva
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
| | - Júlio César Dos Santos
- 1Department of Biotechnology, Engineering School of Lorena, University of São Paulo, Estrada Municipal do Campinho, s/n-Campinho, Lorena, 12602-810 Brazil
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Pamidipati S, Ahmed A. Cellulase stimulation during biodegradation of lignocellulosic residues at increased biomass loading. BIOCATAL BIOTRANSFOR 2018. [DOI: 10.1080/10242422.2018.1508284] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Sirisha Pamidipati
- Department of Chemical Engineering, Birla Institute of Technology and Science Pilani - Hyderabad campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, India
| | - Asma Ahmed
- Department of Chemical Engineering, Birla Institute of Technology and Science Pilani - Hyderabad campus, Jawahar Nagar, Shameerpet Mandal, Hyderabad, India
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Sharma S, Varghese E, Arora A, Singh KN, Singh S, Nain L, Paul D. Augmenting Pentose Utilization and Ethanol Production of Native Saccharomyces cerevisiae LN Using Medium Engineering and Response Surface Methodology. Front Bioeng Biotechnol 2018; 6:132. [PMID: 30320081 PMCID: PMC6166573 DOI: 10.3389/fbioe.2018.00132] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Accepted: 09/04/2018] [Indexed: 12/31/2022] Open
Abstract
Economics of ethanol production from lignocellulosic biomass depends on complete utilization of constituent carbohydrates and efficient fermentation of mixed sugars present in biomass hydrolysates. Saccharomyces cerevisiae, the commercial strain for ethanol production uses only glucose while pentoses remain unused. Recombinant strains capable of utilizing pentoses have been engineered but with limited success. Recently, presence of endogenous pentose assimilation pathway in S. cerevisiae was reported. On the contrary, evolutionary engineering of native xylose assimilating strains is promising approach. In this study, a native strain S. cerevisiae LN, isolated from fruit juice, was found to be capable of xylose assimilation and mixed sugar fermentation. Upon supplementation with yeast extract and peptone, glucose (10%) fermentation efficiency was 78% with ~90% sugar consumption. Medium engineering augmented mixed sugars (5% glucose + 5% xylose) fermentation efficiency to ~50 and 1.6% ethanol yield was obtained with concomitant sugar consumption ~60%. Statistical optimization of input variables Glucose (5.36%), Xylose (3.30%), YE (0.36%), and peptone (0.25%) with Response surface methodology led to improved sugar consumption (74.33%) and 2.36% ethanol within 84 h. Specific activities of Xylose Reductase and Xylitol Dehydrogenase exhibited by S. cerevisiae LN were relatively low. Their ratio indicated metabolism diverted toward ethanol than xylitol and other byproducts. Strain was tolerant to concentrations of HMF, furfural and acetic acid commonly encountered in biomass hydrolysates. Thus, genetic setup for xylose assimilation in S. cerevisiae LN is not merely artifact of xylose metabolizing pathway and can be augmented by adaptive evolution. This strain showed potential for commercial exploitation.
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Affiliation(s)
- Shalley Sharma
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Eldho Varghese
- ICAR-Indian Agricultural Statistics Research Institute, New Delhi, India
| | - Anju Arora
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - K N Singh
- ICAR-Indian Agricultural Statistics Research Institute, New Delhi, India
| | - Surender Singh
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Lata Nain
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, India
| | - Debarati Paul
- Amity Institute of Biotechnology, Amity University, Noida, India
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Sharma S, Arora A, Sharma P, Singh S, Nain L, Paul D. Notable mixed substrate fermentation by native Kodamaea ohmeri strains isolated from Lagenaria siceraria flowers and ethanol production on paddy straw hydrolysates. Chem Cent J 2018; 12:8. [PMID: 29404706 PMCID: PMC5799091 DOI: 10.1186/s13065-018-0375-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Accepted: 01/20/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Bioethanol obtained by fermenting cellulosic fraction of biomass holds promise for blending in petroleum. Cellulose hydrolysis yields glucose while hemicellulose hydrolysis predominantly yields xylose. Economic feasibility of bioethanol depends on complete utilization of biomass carbohydrates and an efficient co-fermenting organism is a prerequisite. While hexose fermentation capability of Saccharomyces cerevisiae is a boon, however, its inability to ferment pentose is a setback. RESULTS Two xylose fermenting Kodamaea ohmeri strains were isolated from Lagenaria siceraria flowers through enrichment on xylose. They showed 61% glucose fermentation efficiency in fortified medium. Medium engineering with 0.1% yeast extract and peptone, stimulated co-fermentation potential of both strains yielding maximum ethanol 0.25 g g-1 on mixed sugars with ~ 50% fermentation efficiency. Strains were tolerant to inhibitors like 5-hydroxymethyl furfural, furfural and acetic acid. Both K. ohmeri strains grew well on biologically pretreated rice straw hydrolysates and produced ethanol. CONCLUSIONS This is the first report of native Kodamaea sp. exhibiting notable mixed substrate utilization and ethanol fermentation. K. ohmeri strains showed relevant traits like utilizing and co-fermenting mixed sugars, exhibiting excellent growth, inhibitor tolerance, and ethanol production on rice straw hydrolysates.
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Affiliation(s)
- Shalley Sharma
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Anju Arora
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India.
| | - Pankhuri Sharma
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Surender Singh
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Lata Nain
- Division of Microbiology, ICAR-Indian Agricultural Research Institute, New Delhi, 110012, India
| | - Debarati Paul
- Amity Institute of Biotechnology, Amity University, Noida, U.P., India
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16
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Synergistic effect of syringic acid and gallic acid supplements in fungal pretreatment of sweet sorghum bagasse for improved lignin degradation and enzymatic saccharification. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.02.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Mishra V, Jana AK. Fungal Pretreatment of Sweet Sorghum Bagasse with Combined CuSO4-Gallic Acid Supplement for Improvement in Lignin Degradation, Selectivity, and Enzymatic Saccharification. Appl Biochem Biotechnol 2017; 183:200-217. [DOI: 10.1007/s12010-017-2439-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Accepted: 02/13/2017] [Indexed: 11/29/2022]
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18
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Rastogi S, Soni R, Kaur J, Soni SK. Unravelling the capability of Pyrenophora phaeocomes S-1 for the production of ligno-hemicellulolytic enzyme cocktail and simultaneous bio-delignification of rice straw for enhanced enzymatic saccharification. BIORESOURCE TECHNOLOGY 2016; 222:458-469. [PMID: 27756023 DOI: 10.1016/j.biortech.2016.10.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 10/02/2016] [Accepted: 10/03/2016] [Indexed: 06/06/2023]
Abstract
A natural variant of Pyrenophora phaeocomes isolated from natural biodiversity was able to grow on various agricultural residues by co-producing laccase, xylanase and mannanase. Solid state fermentation of rice straw induced the highest productivities corresponding to 10,859.51±46.74, 22.01±1.00 and 10.45±0.128IUgds-1 for laccase, xylanase and mannanase respectively after 4days. Besides producing the ligno-hemicellulolytic enzyme cocktail, 40days cultivation of P. phaeocomes S-1 on rice straw brought about the 63 and 51% degradation of lignin and hemicellulose. These components were further removed with mild alkali extraction revealing the overall losses amounting to 78 and 60% respectively for lignin, and hemicellulose. The biologically pretreated straw upon enzymatic hydrolysis revealed 50% saccharification efficiency releasing 470mgg-1 sugars. Application of this knowledge will lead to efficient management of waste rice straw with low cost production of industrially important enzymes cocktail and its biological delignification for effective enzymatic hydrolysis to free sugars.
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Affiliation(s)
- Shubhangi Rastogi
- Department of Microbiology, Panjab University, Chandigarh 160014, India
| | - Raman Soni
- Department of Biotechnology, D.A.V. College, Chandigarh 160011, India
| | - Jaspreet Kaur
- Department of Biotechnology, University Institute of Engineering and Technology, Panjab University, Chandigarh 160014, India
| | - Sanjeev Kumar Soni
- Department of Microbiology, Panjab University, Chandigarh 160014, India.
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