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Saha S, Maji S, Ghosh SK, Maiti MK. Engineered Chlorella vulgaris improves bioethanol production and promises prebiotic application. World J Microbiol Biotechnol 2024; 40:271. [PMID: 39030369 DOI: 10.1007/s11274-024-04074-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Accepted: 07/04/2024] [Indexed: 07/21/2024]
Abstract
Microalgal biomass for biofuel production, integration into functional food, and feed supplementation has generated substantial interest worldwide due to its high growth rate, non-competitiveness for agronomic land, ease of cultivation in containments, and presence of several bioactive molecules. In this study, genetic engineering tools were employed to develop transgenic lines of freshwater microalga Chlorella vulgaris with a higher starch content, by up-regulating ADP-glucose pyrophosphorylase (AGPase), which is a rate-limiting enzyme in starch biosynthesis. Expression of the Escherichia coli glgC (AGPase homolog) gene in C. vulgaris led to an increase in total carbohydrate content up to 45.1% (dry cell weight, DCW) in the transgenic line as compared to 34.2% (DCW) in the untransformed control. The starch content improved up to 16% (DCW) in the transgenic alga compared to 10% (DCW) in the control. However, the content of total lipid, carotenoid, and chlorophyll decreased differentially in the transgenic lines. The carbohydrate-rich biomass from the transgenic algal line was used to produce bioethanol via yeast fermentation, which resulted in a higher ethanol yield of 82.82 mg/L as compared to 54.41 mg/L from the untransformed control. The in vitro digestibility of the transgenic algal starch revealed a resistant starch content of up to 7% of total starch. Faster growth of four probiotic bacterial species along with a lowering of the pH of the growth medium indicated transgenic alga to exert a positive prebiotic effect. Taken together, the study documents the utilization of genetically engineered C. vulgaris with enriched carbohydrates as bioethanol feedstock and functional food ingredients.
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Affiliation(s)
- Sumedha Saha
- Advanced Laboratory for Plant Genetic Engineering, Advanced Technology Development Centre, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Sachin Maji
- Department of Bioscience and Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Sudip K Ghosh
- Department of Bioscience and Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India
| | - Mrinal K Maiti
- Department of Bioscience and Biotechnology, Indian Institute of Technology Kharagpur, Kharagpur, 721302, India.
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Cai Y, Xu Z, Cui F, Pei S, Wei L, Weng Z, Li L. Innovative rapid liquid concentration measurement based on thermal lens effect and machine learning. OPTICS EXPRESS 2024; 32:17837-17852. [PMID: 38858954 DOI: 10.1364/oe.519746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 04/19/2024] [Indexed: 06/12/2024]
Abstract
This study addresses the critical need for rapid and online measurement of liquid concentrations in industrial applications. Although the thermal lens effect (TLE) is extensively explored in laser systems for determining thermal lens focal lengths, its application in quantifying solution concentrations remains underexplored. This research explores the relationship between various liquid concentrations and the interference fringes induced by the TLE. A novel approach is introduced, utilizing TLE to measure solution concentrations, with integration of image processing and discrete Fourier transform (DFT) techniques for feature extraction from interference rings. Further, machine learning, specifically backpropagation artificial neural network (BP-ANN), is employed to model concentration measurement. The model demonstrates high accuracy, evidenced by low root mean square error (RMSE) values of 3.055 and 5.396 for the training and test sets, respectively. This enables precise, real-time determination of soy sauce concentration, offering significant implications for industrial testing, environmental monitoring, and other related fields.
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Amaro-Reyes A, Marcial-Ramírez D, Vázquez-Landaverde PA, Utrilla J, Escamilla-García M, Regalado C, Macias-Bobadilla G, Campos-Guillén J, Ramos-López MA, Favela-Camacho SE. Electrostatic Fermentation: Molecular Response Insights for Tailored Beer Production. Foods 2024; 13:600. [PMID: 38397576 PMCID: PMC10887865 DOI: 10.3390/foods13040600] [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: 01/10/2024] [Revised: 02/11/2024] [Accepted: 02/14/2024] [Indexed: 02/25/2024] Open
Abstract
Electrostatic fermentation avoids the cellular redox imbalance of traditional fermentation, but knowledge gaps exist. This study explores the impact of electrostatic fermentation on the growth, volatile profile, and genetic response of Saccharomyces pastorianus Saflager S-23. The applied voltage (15 and 30 V) in the electrostatic fermentation system increased the growth and substrate utilization of S. pastorianus while decreasing ethanol production. The aromas typically associated with traditional fermentation, such as alcoholic, grape, apple, and sweet notes, were diminished, while aromas like roses, fruits, flowers, and bananas were augmented in electrostatic fermentation. RNA-seq analysis revealed upregulation of genes involved in cell wall structure, oxidoreductase activity, and iron ion binding, while genes associated with protein synthesis, growth control, homeostasis, and membrane function were downregulated under the influence of applied voltage. The electrostatic fermentation system modulates genetic responses and metabolic pathways in yeast, rendering it a promising method for tailored beer production. Demonstrating feasibility under industrial-scale and realistic conditions is crucial for advancing towards commercialization.
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Affiliation(s)
- Aldo Amaro-Reyes
- Faculty of Chemistry, Autonomous University of Queretaro, C.U., Cerro de las Campanas S/N, Las Campanas, Querétaro 76010, QRO, Mexico; (M.E.-G.); (J.C.-G.); (M.A.R.-L.)
- Department of Food Research and Postgraduate Studies, Faculty of Chemistry, Autonomous University of Queretaro, C.U., Cerro de las Campanas S/N, Las Campanas, Querétaro 76010, QRO, Mexico; (D.M.-R.); (C.R.)
| | - Diana Marcial-Ramírez
- Department of Food Research and Postgraduate Studies, Faculty of Chemistry, Autonomous University of Queretaro, C.U., Cerro de las Campanas S/N, Las Campanas, Querétaro 76010, QRO, Mexico; (D.M.-R.); (C.R.)
| | - Pedro Alberto Vázquez-Landaverde
- Center for Research in Applied Science and Advanced Technology, Querétaro Unit, National Polytechnic Institute, Cerro Blanco 141, Colinas del Cimatario, Querétaro 76090, QRO, Mexico;
| | - José Utrilla
- Synthetic Biology Program, Center for Genomic Sciences, National Autonomous University of Mexico, Avenida Universidad 2001, Chamilpa, Cuernavaca 62210, MOR, Mexico;
| | - Monserrat Escamilla-García
- Faculty of Chemistry, Autonomous University of Queretaro, C.U., Cerro de las Campanas S/N, Las Campanas, Querétaro 76010, QRO, Mexico; (M.E.-G.); (J.C.-G.); (M.A.R.-L.)
| | - Carlos Regalado
- Department of Food Research and Postgraduate Studies, Faculty of Chemistry, Autonomous University of Queretaro, C.U., Cerro de las Campanas S/N, Las Campanas, Querétaro 76010, QRO, Mexico; (D.M.-R.); (C.R.)
| | - Gonzalo Macias-Bobadilla
- Division of Postgraduate Studies, Faculty of Engineering, Autonomous University of Querétaro, Cerro de las Campanas S/N, Las Campanas, Querétaro 76010, QRO, Mexico;
| | - Juan Campos-Guillén
- Faculty of Chemistry, Autonomous University of Queretaro, C.U., Cerro de las Campanas S/N, Las Campanas, Querétaro 76010, QRO, Mexico; (M.E.-G.); (J.C.-G.); (M.A.R.-L.)
| | - Miguel Angel Ramos-López
- Faculty of Chemistry, Autonomous University of Queretaro, C.U., Cerro de las Campanas S/N, Las Campanas, Querétaro 76010, QRO, Mexico; (M.E.-G.); (J.C.-G.); (M.A.R.-L.)
| | - Sarai E. Favela-Camacho
- Institute of Engineering and Technology, Autonomous University of Ciudad Juárez, Avenida del Charro s/n y, Calle Henry Dunant, Omega, Cd Juárez 32584, CHIH, Mexico;
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Wen X, Yang H, Li Z, Chu W. Alcohol degradation, learning, and memory-enhancing effect of Acetobacter pasteurianus BP2201 in Caenorhabditis elegans model. J Appl Microbiol 2023; 134:lxad253. [PMID: 37934610 DOI: 10.1093/jambio/lxad253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2023] [Revised: 08/18/2023] [Accepted: 10/31/2023] [Indexed: 11/09/2023]
Abstract
AIMS This study aimed to investigate the probiotic effects of Acetobacter pasteurianus BP2201, isolated from brewing mass, for the treatment of alcohol-induced learning and memory ability impairments in a Caenorhabditis elegans model. METHODS AND RESULTS Acetobacter pasteurianus BP2201 was examined for probiotic properties, including acid and bile salt resistance, ethanol degradation, antioxidant efficacy, hemolytic activity, and susceptibility to antibiotics. The strain displayed robust acid and bile salt tolerance, efficient ethanol degradation, potent antioxidant activity, and susceptibility to specific antibiotics. Additionally, in the C. elegans model, administering A. pasteurianus BP2201 significantly improved alcohol-induced learning and memory impairments. CONCLUSIONS Acetobacter pasteurianus BP2201 proves to be a promising candidate strain for the treatment of learning and memory impairments induced by alcohol intake.
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Affiliation(s)
- Xin Wen
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210009, China
| | - Huazhong Yang
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210009, China
| | - Zhongqi Li
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210009, China
| | - Weihua Chu
- Department of Pharmaceutical Microbiology, School of Life Science and Technology, China Pharmaceutical University, Nanjing 210009, China
- State Key Laboratory of Natural Medicines, China Pharmaceutical University, Nanjing 210009, China
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Gord Noshahri N, Sharifi A, Seyedabadi M, Rudat J, Zare Mehrjerdi M. Development of two devices for high-throughput screening of ethanol-producing microorganisms by real-time CO 2 production monitoring. Bioprocess Biosyst Eng 2023:10.1007/s00449-023-02892-3. [PMID: 37338580 DOI: 10.1007/s00449-023-02892-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Accepted: 06/06/2023] [Indexed: 06/21/2023]
Abstract
Bioethanol's importance as a renewable energy carrier led to the development of new devices for the high-throughput screening (HTS) of ethanol-producing microorganisms, monitoring ethanol production, and process optimization. This study developed two devices based on measuring CO2 evolution (an equimolar byproduct of microbial ethanol fermentation) to allow for a fast and robust HTS of ethanol-producing microorganisms for industrial purposes. First, a pH-based system for identifying ethanol producers (Ethanol-HTS) was established in a 96-well plate format where CO2 emission is captured by a 3D-printed silicone lid and transferred from the fermentation well to a reagent containing bromothymol blue as a pH indicator. Second, a self-made CO2 flow meter (CFM) was developed as a lab-scale tool for real-time quantification of ethanol production. This CFM contains four chambers to simultaneously apply different fermentation treatments while LCD and serial ports allow fast and easy data transfer. Applying ethanol-HTS with various yeast concentrations and yeast strains displayed different colors, from dark blue to dark and light green, based on the amount of carbonic acid formed. The results of the CFM device revealed a fermentation profile. The curve of CO2 production flow among six replications showed the same pattern in all batches. The comparison of final ethanol concentrations calculated based on CO2 flow by the CFM device with the GC analysis showed 3% difference which is not significant. Data validation of both devices demonstrated their applicability for screening novel bioethanol-producer strains, determining carbohydrate fermentation profiles, and monitoring ethanol production in real time.
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Affiliation(s)
- Najme Gord Noshahri
- Industrial Microbial Biotechnology Department, Research Institute for Industrial Biotechnology, Academic Center for Education, Culture and Research (ACECR)-Khorasan Razavi Branch, P.O. Box 91775-1376, Mashhad, Iran
| | - Ahmad Sharifi
- Horticultural Plants Biotechnology Department, Research Institute for Industrial Biotechnology, Academic Center for Education, Culture and Research (ACECR)-Khorasan Razavi Branch, P.O. Box 91775-1376, Mashhad, Iran
| | - Mohsen Seyedabadi
- Industrial Microbial Biotechnology Department, Research Institute for Industrial Biotechnology, Academic Center for Education, Culture and Research (ACECR)-Khorasan Razavi Branch, P.O. Box 91775-1376, Mashhad, Iran
| | - Jens Rudat
- BLT 2: Technical Biology, Karlsruhe Institute of Technology (KIT), Fritz-Haber-Weg 4, 76131, Karlsruhe, Germany
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Langer M, Hilo A, Guan JC, Koch KE, Xiao H, Verboven P, Gündel A, Wagner S, Ortleb S, Radchuk V, Mayer S, Nicolai B, Borisjuk L, Rolletschek H. Causes and consequences of endogenous hypoxia on growth and metabolism of developing maize kernels. PLANT PHYSIOLOGY 2023; 192:1268-1288. [PMID: 36691698 PMCID: PMC10231453 DOI: 10.1093/plphys/kiad038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/13/2022] [Accepted: 12/19/2022] [Indexed: 06/01/2023]
Abstract
Maize (Zea mays) kernels are the largest cereal grains, and their endosperm is severely oxygen deficient during grain fill. The causes, dynamics, and mechanisms of acclimation to hypoxia are minimally understood. Here, we demonstrate that hypoxia develops in the small, growing endosperm, but not the nucellus, and becomes the standard state, regardless of diverse structural and genetic perturbations in modern maize (B73, popcorn, sweet corn), mutants (sweet4c, glossy6, waxy), and non-domesticated wild relatives (teosintes and Tripsacum species). We also uncovered an interconnected void space at the chalazal pericarp, providing superior oxygen supply to the placental tissues and basal endosperm transfer layer. Modeling indicated a very high diffusion resistance inside the endosperm, which, together with internal oxygen consumption, could generate steep oxygen gradients at the endosperm surface. Manipulation of oxygen supply induced reciprocal shifts in gene expression implicated in controlling mitochondrial functions (23.6 kDa Heat-Shock Protein, Voltage-Dependent Anion Channel 2) and multiple signaling pathways (core hypoxia genes, cyclic nucleotide metabolism, ethylene synthesis). Metabolite profiling revealed oxygen-dependent shifts in mitochondrial pathways, ascorbate metabolism, starch synthesis, and auxin degradation. Long-term elevated oxygen supply enhanced the rate of kernel development. Altogether, evidence here supports a mechanistic framework for the establishment of and acclimation to hypoxia in the maize endosperm.
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Affiliation(s)
- Matthias Langer
- Molecular Genetics Department, Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, Corrensstrasse, 06466 Seeland-Gatersleben, Germany
| | - Alexander Hilo
- Molecular Genetics Department, Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, Corrensstrasse, 06466 Seeland-Gatersleben, Germany
| | - Jiahn-Chou Guan
- University of Florida, Horticultural Sciences Department, Fifield Hall, 2550 Hull Rd., PO Box 110690, Gainesville, Florida, 32611, USA
| | - Karen E Koch
- University of Florida, Horticultural Sciences Department, Fifield Hall, 2550 Hull Rd., PO Box 110690, Gainesville, Florida, 32611, USA
| | - Hui Xiao
- Biosystems Department, KU Leuven—University of Leuven, BIOSYST-MeBioS, Willem de Croylaan 42, B-3001 Leuven, Belgium
| | - Pieter Verboven
- Biosystems Department, KU Leuven—University of Leuven, BIOSYST-MeBioS, Willem de Croylaan 42, B-3001 Leuven, Belgium
| | - Andre Gündel
- Molecular Genetics Department, Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, Corrensstrasse, 06466 Seeland-Gatersleben, Germany
| | - Steffen Wagner
- Molecular Genetics Department, Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, Corrensstrasse, 06466 Seeland-Gatersleben, Germany
| | - Stefan Ortleb
- Molecular Genetics Department, Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, Corrensstrasse, 06466 Seeland-Gatersleben, Germany
| | - Volodymyr Radchuk
- Molecular Genetics Department, Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, Corrensstrasse, 06466 Seeland-Gatersleben, Germany
| | - Simon Mayer
- Molecular Genetics Department, Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, Corrensstrasse, 06466 Seeland-Gatersleben, Germany
| | - Bart Nicolai
- Biosystems Department, KU Leuven—University of Leuven, BIOSYST-MeBioS, Willem de Croylaan 42, B-3001 Leuven, Belgium
| | - Ljudmilla Borisjuk
- Molecular Genetics Department, Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, Corrensstrasse, 06466 Seeland-Gatersleben, Germany
| | - Hardy Rolletschek
- Molecular Genetics Department, Leibniz-Institut für Pflanzengenetik und Kulturpflanzenforschung, Corrensstrasse, 06466 Seeland-Gatersleben, Germany
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Memon SF, Wang R, Strunz B, Chowdhry BS, Pembroke JT, Lewis E. Novel Corrugated Long Period Grating Surface Balloon-Shaped Heterocore-Structured Plastic Optical Fibre Sensor for Microalgal Bioethanol Production. SENSORS (BASEL, SWITZERLAND) 2023; 23:1644. [PMID: 36772687 PMCID: PMC9921262 DOI: 10.3390/s23031644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 01/16/2023] [Accepted: 01/31/2023] [Indexed: 06/18/2023]
Abstract
A novel long period grating (LPG) inscribed balloon-shaped heterocore-structured plastic optical fibre (POF) sensor is described and experimentally demonstrated for real-time measurement of the ultra-low concentrations of ethanol in microalgal bioethanol production applications. The heterocore structure is established by coupling a 250 μm core diameter POF between two 1000 μm diameter POFs, thus representing a large core-small core-large core configuration. Before coupling as a heterocore structure, the sensing region or small core fibre (SCF; i.e., 250 μm POF) is modified by polishing, LPG inscription, and macro bending into a balloon shape to enhance the sensitivity of the sensor. The sensor was characterized for ethanol-water solutions in the ethanol concentration ranges of 20 to 80 %v/v, 1 to 10 %v/v, 0.1 to 1 %v/v, and 0.00633 to 0.0633 %v/v demonstrating a maximum sensitivity of 3 × 106 %/RIU, a resolution of 7.9 × 10-6 RIU, and a limit of detection (LOD) of 9.7 × 10-6 RIU. The experimental results are included for the intended application of bioethanol production using microalgae. The characterization was performed in the ultra-low-level ethanol concentration range, i.e., 0.00633 to 0.03165 %v/v, that is present in real culturing and production conditions, e.g., ethanol-producing blue-green microalgae mixtures. The sensor demonstrated a maximum sensitivity of 210,632.8 %T/%v/v (or 5 × 106 %/RIU as referenced from the RI values of ethanol-water solutions), resolution of 2 × 10-4%v/v (or 9.4 × 10-6 RIU), and LOD of 4.9 × 10-4%v/v (or 2.3 × 10-5 RIU). Additionally, the response and recovery times of the sensor were investigated in the case of measurement in the air and the ethanol-microalgae mixtures. The experimentally verified, extremely high sensitivity and resolution and very low LOD corresponding to the initial rate of bioethanol production using microalgae of this sensor design, combined with ease of fabrication, low cost, and wide measurement range, makes it a promising candidate to be incorporated into the bioethanol production industry as a real-time sensing solution as well as in other ethanol sensing and/or RI sensing applications.
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Affiliation(s)
- Sanober Farheen Memon
- Optical Fibre Sensors Research Centre, University of Limerick, V94 T9PX Limerick, Ireland
- Department of Electronic and Computer Engineering, University of Limerick, V94 T9PX Limerick, Ireland
| | - Ruoning Wang
- Optical Fibre Sensors Research Centre, University of Limerick, V94 T9PX Limerick, Ireland
- Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
| | - Bob Strunz
- Department of Electronic and Computer Engineering, University of Limerick, V94 T9PX Limerick, Ireland
| | - Bhawani Shankar Chowdhry
- NCRA-CMS Lab, IICT, Mehran University of Engineering and Technology, Jamshoro 76062, Sindh, Pakistan
| | - J. Tony Pembroke
- Department of Chemical Sciences and Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland
| | - Elfed Lewis
- Optical Fibre Sensors Research Centre, University of Limerick, V94 T9PX Limerick, Ireland
- Department of Electronic and Computer Engineering, University of Limerick, V94 T9PX Limerick, Ireland
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Substrate concentration: A more serious consideration than the amount of 5-hydroxymethylfurfural in acid-catalyzed hydrolysis during bioethanol production from starch biomass. Heliyon 2022; 8:e12047. [PMID: 36561686 PMCID: PMC9763765 DOI: 10.1016/j.heliyon.2022.e12047] [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] [Received: 05/29/2022] [Revised: 08/16/2022] [Accepted: 11/24/2022] [Indexed: 12/12/2022] Open
Abstract
5-hydroxymethylfurfural (5-HMF) yield during bioethanol production from starch was determined using spectrophotometry and chromatography. Increasing acid concentration and time favored 5-HMF production with HCl while yield decreased after 45-minute hydrolysis time for HNO3 and H2SO4 hydrolyzed samples. Impacts of glucose (substrate) concentration and produced 5-HMF on bioethanol yield were studied with different sulphuric acid concentrations and different α-amylase and amyloglucosidase activities. A central composite rotational design was utilized to determine the conditions of hydrolysis for optimum glucose production. The results showed that maximum glucose yield occurred at 0.5 M acid concentration and 45-minute hydrolysis time, while maximum yield was achieved at 120 and 280 units of α-amylase and amyloglucosidase activities respectively. It was shown that 5-HMF did not exhibit much inhibition on ethanol yield at low acid concentrations but became pronounced at higher acid concentrations, while high glucose concentrations had a pronounced negative effect on ethanol yield and fermentation efficiency.
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Sherpa KC, Kundu D, Banerjee S, Ghangrekar MM, Banerjee R. An integrated biorefinery approach for bioethanol production from sugarcane tops. JOURNAL OF CLEANER PRODUCTION 2022. [DOI: 10.1016/j.jclepro.2022.131451] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Expression of the human antiapoptotic protein Bcl-2 increases nerolidol production in engineered yeast. Process Biochem 2022. [DOI: 10.1016/j.procbio.2022.05.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Saeed S, Samer M, Mohamed MSM, Abdelsalam E, Mohamed YMA, Abdel-Hafez SH, Attia YA. Implementation of graphitic carbon nitride nanomaterials and laser irradiation for increasing bioethanol production from potato processing wastes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:34887-34897. [PMID: 35040058 DOI: 10.1007/s11356-021-18119-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 12/10/2021] [Indexed: 05/09/2023]
Abstract
Agricultural and agro-industrial wastes (e.g., potato peel waste) are causing severe environmental problems. The processes of pretreatment, saccharification, and fermentation are the major obstacles in bioethanol production from wastes and must be overcome by efficient novel techniques. The effect of exposing the fungi (yeast) Saccharomyces cerevisiae to laser source with the addition of graphitic carbon nitride nanosheets (g-C3N4) with different concentrations on bioethanol production was investigated through the implementation of a batch anaerobic system and using potato peel waste (PPW). Dichromate test was implemented as quantitative analysis for quantification of the bioethanol yield. The benefits of this test were the appearance of green color indicating the identification of ethanol (C2H5OH) by bare eye and the ease to calculate the bioethanol yield through UV-visible spectrophotometry. The control sample (0.0 ppm of g-C3N4) showed only a 4% yield of bioethanol; however, by adding 150 ppm to PPW medium, 22.61% of ethanol was produced. Besides, laser irradiations (blue and red) as influencing parameters were studied with and without the addition of g-C3N4 nanomaterials aiming to increase the bioethanol. It was determined that the laser irradiation can trigger the bioethanol production (in case of red: 13.13% and in case of blue: 16.14% yields, respectively) compared to the control sample (in absence of g-C3N4). However, by adding different concentrations of g-C3N4 nanomaterials from 5 to 150 ppm, the bioethanol yield was increased as follows: in case of red: 56.11% and, in case of blue: 56.77%, respectively. It was found that using fungi and exposing it to the blue laser diode source having a wavelength of 450 nm and a power of 250 mW for a duration of 30 min with the addition of 150 mg L-1 of g-C3N4 nanomaterials delivered the highest bioethanol yield from PPW.
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Affiliation(s)
- Samar Saeed
- National Institute of Laser Enhanced Sciences, Cairo University, Giza, 12613, Egypt
| | - Mohamed Samer
- Department of Agricultural Engineering, Faculty of Agriculture, Cairo University, Giza, 12613, Egypt
| | - Mahmoud S M Mohamed
- Department of Botany and Microbiology, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Essam Abdelsalam
- National Institute of Laser Enhanced Sciences, Cairo University, Giza, 12613, Egypt
| | - Yasser M A Mohamed
- Photochemistry Department, National Research Center, Dokki, Giza, 12622, Egypt
| | - Shams H Abdel-Hafez
- Department of Chemistry, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Yasser A Attia
- National Institute of Laser Enhanced Sciences, Cairo University, Giza, 12613, Egypt.
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12
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Kaewnu K, Samoson K, Thiangchanya A, Phonchai A, Limbut W. A novel colorimetric indicator for ethanol detection in preserved baby mangoes. Food Chem 2022; 369:130769. [PMID: 34461509 DOI: 10.1016/j.foodchem.2021.130769] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 07/30/2021] [Accepted: 08/03/2021] [Indexed: 11/29/2022]
Abstract
A colorimetric indicator cube for use in smart packaging was designed and fabricated to detect ethanol produced by microbial fermentation in preserved baby mangoes. The presence and level of ethanol was indicated by color variations of the indicator cube, which consists of porous melamine foam (MF) that entraps an indicator solution of potassium dichromate and sulfuric acid. Within the packaging, the cube sits behind a gas-permeable membrane. The morphological structure of MF was studied by digital microscope and X-ray fluorescence analysis. In the optimal condition, the indicator cube exhibited distinct color changes from yellow to brown, green and blue over an ethanol concentration range from 0.25% to 5.0%. Color changes were clearly visible to the naked eye. The repeatability of the ethanol indicator cube was good and storage stability was maintained for up to 19 and 74 days at room and refrigeration temperatures, respectively. The smart packaging was applied to detect ethanol in preserved baby mangoes at different storage times.
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Affiliation(s)
- Krittapas Kaewnu
- Division of Health and Applied Sciences, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Forensic Innovation Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Kritsada Samoson
- Division of Health and Applied Sciences, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Forensic Innovation Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Adul Thiangchanya
- Division of Health and Applied Sciences, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Apichai Phonchai
- Division of Health and Applied Sciences, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Forensic Innovation Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
| | - Warakorn Limbut
- Division of Health and Applied Sciences, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Trace Analysis and Biosensor, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Center of Excellence for Innovation in Chemistry, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand; Forensic Innovation Center, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand.
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13
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Memon SF, Wang R, Strunz B, Chowdhry BS, Pembroke JT, Lewis E. A Review of Optical Fibre Ethanol Sensors: Current State and Future Prospects. SENSORS 2022; 22:s22030950. [PMID: 35161695 PMCID: PMC8840036 DOI: 10.3390/s22030950] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 01/14/2022] [Accepted: 01/21/2022] [Indexed: 12/04/2022]
Abstract
A range of optical fibre-based sensors for the measurement of ethanol, primarily in aqueous solution, have been developed and are reviewed here. The sensing approaches can be classified into four groups according to the measurement techniques used, namely absorption (or absorbance), external interferometric, internal fibre grating and plasmonic sensing. The sensors within these groupings can be compared in terms of their characteristic performance indicators, which include sensitivity, resolution and measurement range. Here, particular attention is paid to the potential application areas of these sensors as ethanol production is globally viewed as an important industrial activity. Potential industrial applications are highlighted in the context of the emergence of the internet of things (IoT), which is driving widespread utilization of these sensors in the commercially significant industrial and medical sectors. The review concludes with a summary of the current status and future prospects of optical fibre ethanol sensors for industrial use.
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Affiliation(s)
- Sanober Farheen Memon
- Optical Fibre Sensors Research Centre, University of Limerick, V94 T9PX Limerick, Ireland;
- Department of Electronic and Computer Engineering, University of Limerick, V94 T9PX Limerick, Ireland;
- Correspondence: (S.F.M.); (E.L.)
| | - Ruoning Wang
- Optical Fibre Sensors Research Centre, University of Limerick, V94 T9PX Limerick, Ireland;
- Key Laboratory of In-Fiber Integrated Optics of Ministry of Education, College of Physics and Optoelectronic Engineering, Harbin Engineering University, Harbin 150001, China
| | - Bob Strunz
- Department of Electronic and Computer Engineering, University of Limerick, V94 T9PX Limerick, Ireland;
| | - Bhawani Shankar Chowdhry
- NCRA-CMS Lab, IICT, Mehran University of Engineering and Technology, Jamshoro 76062, Sindh, Pakistan;
| | - J. Tony Pembroke
- Department of Chemical Sciences and Bernal Institute, University of Limerick, V94 T9PX Limerick, Ireland;
| | - Elfed Lewis
- Optical Fibre Sensors Research Centre, University of Limerick, V94 T9PX Limerick, Ireland;
- Department of Electronic and Computer Engineering, University of Limerick, V94 T9PX Limerick, Ireland;
- Correspondence: (S.F.M.); (E.L.)
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14
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Mukherjee S, Koramutla MK, Levin DB, Ayele BT. Genetic variation in transcriptional regulation of wheat seed starch content and its conversion to bioethanol. Food Energy Secur 2021. [DOI: 10.1002/fes3.339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Shalini Mukherjee
- Department of Plant Science University of Manitoba Winnipeg Manitoba Canada
| | | | - David B. Levin
- Department of Biosystems Engineering University of Manitoba Winnipeg Manitoba Canada
| | - Belay T. Ayele
- Department of Plant Science University of Manitoba Winnipeg Manitoba Canada
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15
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Mohanasundaram S, Ramirez-Asis E, Quispe-Talla A, Bhatt MW, Shabaz M. Experimental replacement of hops by mango in beer: production and comparison of total phenolics, flavonoids, minerals, carbohydrates, proteins and toxic substances. INTERNATIONAL JOURNAL OF SYSTEM ASSURANCE ENGINEERING AND MANAGEMENT 2021. [DOI: 10.1007/s13198-021-01308-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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16
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Nath BJ, Mishra AK, Sarma HK. Assessment of quorum sensing effects of tyrosol on fermentative performance by chief ethnic fermentative yeasts from northeast India. J Appl Microbiol 2020; 131:728-742. [PMID: 33103297 DOI: 10.1111/jam.14908] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 09/28/2020] [Accepted: 10/21/2020] [Indexed: 11/29/2022]
Abstract
AIM Tyrosol, a quorum sensing molecule in yeasts, was reported to reduce lag phase and induces hyphae formation during cell proliferation. However, evidence of any enhancing effect of tyrosol in cellular proliferation within fermentative environment is unclear. In this investigation, selected yeast cells were assessed for their ability to synthesize tyrosol followed by examining the role of the molecule during fermentation. METHODS AND RESULTS Tyrosols were characterized in four fermentative yeasts viz., Saccharomyces cerevisiae, Wickerhamomyces anomalus, Candida glabrata and Candida tropicalis isolated from traditional fermentative cakes of northeast India. All the isolates synthesized tyrosol while C. tropicalis exhibited filamentous growth in response to tyrosols retrieved from other isolates. Purified tyrosols showed protective behaviour in C. tropicalis and S. cerevisiae under ethanol mediated oxidative stress. During fermentation, tyrosol significantly enhanced growth of W. anomalus in starch medium while C. tropicalis exhibited growth enhancement in starch and glucose sources. The chief fermentative yeast S. cerevisiae showed notable enhancement in fermentative capacity in starch medium under the influence of tyrosol con-commitment of ethanol production. CONCLUSION The study concludes that tyrosol exerts unusual effect in cellular growth and fermentative ability of both Saccharomyces and non-Saccharomyces yeasts. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first report of expression of tyrosol by non-conventional yeasts, where the molecule was found to exert enhancing effect during fermentation, thereby augmenting the process of metabolite production during traditional fermentation.
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Affiliation(s)
- B J Nath
- Microbial Communication and Fungal Biology Group, Department of Biotechnology, Gauhati University, Guwahati, Assam, India
| | - A K Mishra
- Laboratory of Microbial Genetics, Department of Botany, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - H K Sarma
- Microbial Communication and Fungal Biology Group, Department of Biotechnology, Gauhati University, Guwahati, Assam, India
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17
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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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18
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Chandra N, Shukla P, Mallick N. Role of cultural variables in augmenting carbohydrate accumulation in the green microalga Scenedesmus acuminatus for bioethanol production. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2020. [DOI: 10.1016/j.bcab.2020.101632] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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19
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Nedumaran M, Singh S, Jamaldheen SB, Nath P, Moholkar VS, Goyal A. Assessment of combination of pretreatment of Sorghum durra stalk and production of chimeric enzyme (β-glucosidase and endo β-1,4 glucanase, CtGH1-L1- CtGH5-F194A) and cellobiohydrolase ( CtCBH5A) for saccharification to produce bioethanol. Prep Biochem Biotechnol 2020; 50:883-896. [PMID: 32425106 DOI: 10.1080/10826068.2020.1762214] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Optimization of pretreatment and saccharification of Sorghum durra stalk (Sds) was carried out. The chimeric enzyme (CtGH1-L1-CtGH5-F194A) having β-glucosidase (CtGH1) and endo β-1,4 glucanase activity (CtGH5-F194A) and cellobiohydrolase (CtCBH5A) from Clostridium thermocellum were used for saccharification. Chimeric enzyme will save production cost of two enzymes, individually. Stage 2 pretreatment by 1% (w/v) NaOH assisted autoclaving + 1.5% (v/v) dilute H2SO4 assisted oven heating gave lower total sugar yield (366.6 mg/g of pretreated Sds) and total glucose yield (195 mg/g of pretreated Sds) in pretreated hydrolysate with highest crystallinity index 55.6% than the other stage 2 pretreatments. Optimized parameters for saccharification of above stage 2 pretreated biomass were 3% (w/v) biomass concentration, enzyme (chimera: cellobiohydrolase) ratio, 2:3 (U/g) of biomass, total enzyme loading (350 U/g of pretreated biomass), 24 h and 30 °C. Best stage 2 pretreated Sds under optimized enzyme saccharification conditions gave maximum total reducing sugar yield 417 mg/g and glucose yield 285 mg/g pretreated biomass in hydrolysate. Best stage 2 pretreated Sds showed significantly higher cellulose, 71.3% and lower lignin, 2.0% and hemicellulose, 12.2% (w/w) content suggesting the effectiveness of method. This hydrolysate upon SHF using Saccharomyces cerevisiae under unoptimized conditions produced ethanol yield, 0.12 g/g of glucose. Abbreviation: Ct-Clostridium thermocellum, Sds-Sorghum durra stalk, TRS-Total reducing sugar, HPLC-High performance liquid chromatography, RI-Refractive index, ADL-acid insoluble lignin, GYE-Glucose yeast extract, MGYP-Malt glucose yeast extract peptone, SHF-separate hydrolysis and fermentation, OD-Optical density, PVDF-Poly vinylidene fluoride, TS-total sugar, FESEM-Field emission scanning electron microscopy, XRD-X-ray diffraction, FTIR-Fourier transform infra-red spectroscopy and CrI-Crystallinity index.
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Affiliation(s)
- Mohanapriya Nedumaran
- Carbohydrate Enzyme Biotechnology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India
| | - Shweta Singh
- Carbohydrate Enzyme Biotechnology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India.,DBT PAN-IIT Centre for Bioenergy, Indian Institute of Technology Guwahati, Guwahati, India
| | - Sumitha Banu Jamaldheen
- DBT PAN-IIT Centre for Bioenergy, Indian Institute of Technology Guwahati, Guwahati, India.,Centre for Energy, Indian Institute of Technology Guwahati, Guwahati, India
| | - Priyanka Nath
- Carbohydrate Enzyme Biotechnology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India.,DBT PAN-IIT Centre for Bioenergy, Indian Institute of Technology Guwahati, Guwahati, India
| | - Vijayanand Suryakant Moholkar
- Centre for Energy, Indian Institute of Technology Guwahati, Guwahati, India.,Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati, India
| | - Arun Goyal
- Carbohydrate Enzyme Biotechnology Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati, India.,DBT PAN-IIT Centre for Bioenergy, Indian Institute of Technology Guwahati, Guwahati, India.,Centre for Energy, Indian Institute of Technology Guwahati, Guwahati, India
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20
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Nath BJ, Verma E, Sarma HK, Mishra AK, Tanti B, Jha DK. Evaluation of Basic Fermentation Parameters and Effective Combinations of Predominant Yeasts from Traditional Starter Materials of Indigenous Communities from Northeast India. JOURNAL OF THE AMERICAN SOCIETY OF BREWING CHEMISTS 2020. [DOI: 10.1080/03610470.2020.1739601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Bhaskar Jyoti Nath
- Microbial Communication and Fungal Biology Group, Department of Biotechnology, Gauhati University, Guwahati, India
| | - Ekta Verma
- Laboratory of Microbial Genetics, Department of Botany, Banaras Hindu University, Varanasi, India
| | - Hridip Kumar Sarma
- Microbial Communication and Fungal Biology Group, Department of Biotechnology, Gauhati University, Guwahati, India
| | - Arun Kumar Mishra
- Laboratory of Microbial Genetics, Department of Botany, Banaras Hindu University, Varanasi, India
| | - Bhaben Tanti
- Department of Botany, Gauhati University, Guwahati, India
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21
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Bhagat AK, Buium H, Shmul G, Alfonta L. Genetically Expanded Reactive-Oxygen-Tolerant Alcohol Dehydrogenase II. ACS Catal 2020. [DOI: 10.1021/acscatal.9b03739] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Ashok Kumar Bhagat
- Departments of Life Sciences, Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Hadar Buium
- Departments of Life Sciences, Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Guy Shmul
- Department of Chemical Research Support, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Lital Alfonta
- Departments of Life Sciences, Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
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22
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Continuous production of bioethanol from sugarcane bagasse and downstream purification using membrane integrated bioreactor. Catal Today 2019. [DOI: 10.1016/j.cattod.2017.11.031] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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23
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Althuri A, Venkata Mohan S. Single pot bioprocessing for ethanol production from biogenic municipal solid waste. BIORESOURCE TECHNOLOGY 2019; 283:159-167. [PMID: 30903822 DOI: 10.1016/j.biortech.2019.03.055] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2019] [Revised: 03/07/2019] [Accepted: 03/09/2019] [Indexed: 06/09/2023]
Abstract
Burgeoning global energy demand and rapid diminution of fossil fuel reserves urged to seek for a sustainable energy source like bioethanol. Single pot bioprocessing (SPB) strategy employing in-house laccase, cellulase plus xylanase and amylase along with hexose and pentose sugar fermenting yeasts (Saccharomyces cerevisiae and Pichia stipitis) is designed in this study for ethanol production from biogenic municipal solid waste (BMSW). BMSW when subjected to simultaneous pretreatment and saccharification (SPS) resulted in 79.69% enzymatic digestibility and fared better compared to alkali pretreated counterparts (14.03%-51.10%). The maximum total sugar release in case of SPS was 146.9 g/L in 24 h. The maximum ethanol concentration of 5.24% (v/v) in 30 h was obtained from SPB of BMSW at 25% (w/v) solid loading. SPB for ethanol production from BMSW is an interesting and effective alternative to MSW going to landfill or incineration with an added perk of waste to wealth conversion.
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Affiliation(s)
- Avanthi Althuri
- Bioengineering and Environmental Sciences Lab, CEEFF, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, Telangana, India
| | - S Venkata Mohan
- Bioengineering and Environmental Sciences Lab, CEEFF, CSIR-Indian Institute of Chemical Technology, Tarnaka, Hyderabad 500007, Telangana, India.
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24
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Abstract
This is a PhD proposal defended in a 2012-2013 session at the Institute of Biological Sciences, Faculty of Science, University of Malaya, Malaysia. The proposal has been written in accordance with the requirements of the university under the sub-headings: background, problem statement, rationale, hypothesis and research questions, research objectives, literature review, methodology, scope, expected outcomes and concluding remarks, work schedule, and references. This proposal provides a comprehensive study on bioethanol production from corn. First, it discusses development and field experiments of high sugary genotypes (HSGs). Secondly, it provides a comparative evaluation of enzyme consumptions and ethanol production between normal and HSG corn genotypes. Finally, this proposal provides evaluation of the co-product quality for both groups of genotypes. The readers who are interested to conduct any further study on corn-based bioethanol would be benefited from this proposal.
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25
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Maithani M, Grover H, Raturi R, Gupta V, Bansal P. Ethanol content in traditionally fermented ayurvedic formulations: Compromised Good Manufacturing Practice regulations – compromised health. THE AMERICAN JOURNAL OF DRUG AND ALCOHOL ABUSE 2018; 45:208-216. [DOI: 10.1080/00952990.2018.1529181] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Mukesh Maithani
- Multidisciplinary Research Unit, University Centre of Excellence in Research, Baba Farid University of Health Sciences, Faridkot, India
| | - Harpreet Grover
- Multidisciplinary Research Unit, University Centre of Excellence in Research, Baba Farid University of Health Sciences, Faridkot, India
| | - Richa Raturi
- Multidisciplinary Research Unit, University Centre of Excellence in Research, Baba Farid University of Health Sciences, Faridkot, India
| | - Vikas Gupta
- Multidisciplinary Research Unit, University Centre of Excellence in Research, Baba Farid University of Health Sciences, Faridkot, India
| | - Parveen Bansal
- Multidisciplinary Research Unit, University Centre of Excellence in Research, Baba Farid University of Health Sciences, Faridkot, India
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26
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Hossain T, Miah AB, Mahmud SA, Mahin AA. Enhanced Bioethanol Production from Potato Peel Waste Via Consolidated Bioprocessing with Statistically Optimized Medium. Appl Biochem Biotechnol 2018; 186:425-442. [PMID: 29644595 DOI: 10.1007/s12010-018-2747-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Accepted: 03/21/2018] [Indexed: 01/15/2023]
Abstract
In this study, an extensive screening was undertaken to isolate some amylolytic microorganisms capable of producing bioethanol from starchy biomass through Consolidated Bioprocessing (CBP). A total of 28 amylolytic microorganisms were isolated, from which 5 isolates were selected based on high α-amylase and glucoamylase activities and identified as Candida wangnamkhiaoensis, Hyphopichia pseudoburtonii (2 isolates), Wickerhamia sp., and Streptomyces drozdowiczii based on 26S rDNA and 16S rDNA sequencing. Wickerhamia sp. showed the highest ethanol production (30.4 g/L) with fermentation yield of 0.3 g ethanol/g starch. Then, a low cost starchy waste, potato peel waste (PPW) was used as a carbon source to produce ethanol by Wickerhamia sp. Finally, in order to obtain maximum ethanol production from PPW, a fermentation medium was statistically designed. The effect of various medium ingredients was evaluated initially by Plackett-Burman design (PBD), where malt extracts, tryptone, and KH2PO4 showed significantly positive effect (p value < 0.05). Using Response Surface Modeling (RSM), 40 g/L (dry basis) PPW and 25 g/L malt extract were found optimum and yielded 21.7 g/L ethanol. This study strongly suggests Wickerhamia sp. as a promising candidate for bioethanol production from starchy biomass, in particular, PPW through CBP.
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Affiliation(s)
- Tahmina Hossain
- Department of Biotechnology and Genetic Engineering, Jahangirnagar University, Savar, Dhaka, 1342, Bangladesh
| | - Abdul Bathen Miah
- Microbiology and Industrial Irradiation Division, Institute of Food and Radiation Biology, Atomic Energy Research Establishment, Ganakbari, Savar, Dhaka, 1349, Bangladesh
| | - Siraje Arif Mahmud
- Department of Biotechnology and Genetic Engineering, Jahangirnagar University, Savar, Dhaka, 1342, Bangladesh
| | - Abdullah-Al- Mahin
- Microbiology and Industrial Irradiation Division, Institute of Food and Radiation Biology, Atomic Energy Research Establishment, Ganakbari, Savar, Dhaka, 1349, Bangladesh.
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27
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Paredes RDS, Vieira IPV, Mello VMD, Vilela LDF, Schwan RF, Eleutherio ECA. Identification of three robust and efficient Saccharomyces cerevisiae strains isolated from Brazilian's cachaça distilleries. ACTA ACUST UNITED AC 2018. [DOI: 10.1016/j.biori.2018.07.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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28
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Sherpa KC, Ghangrekar MM, Banerjee R. Optimization of saccharification of enzymatically pretreated sugarcane tops by response surface methodology for ethanol production. BIOFUELS-UK 2017. [DOI: 10.1080/17597269.2017.1409058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Knawang Chhunji Sherpa
- Advanced Technology Development Centre, Indian Institute of Technology, Kharagpur -721302, India
| | | | - Rintu Banerjee
- Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur -721302, India
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29
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Statistical optimization of acid catalyzed steam pretreatment of citrus peel waste for bioethanol production. RESOURCE-EFFICIENT TECHNOLOGIES 2017. [DOI: 10.1016/j.reffit.2017.04.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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30
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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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31
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Khan MI, Lee MG, Shin JH, Kim JD. Pretreatment optimization of the biomass of Microcystis aeruginosa for efficient bioethanol production. AMB Express 2017; 7:19. [PMID: 28063146 PMCID: PMC5218947 DOI: 10.1186/s13568-016-0320-y] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Accepted: 12/26/2016] [Indexed: 01/12/2023] Open
Abstract
Microalgae are considered to be the future promising sources of biofuels and bio products. The algal carbohydrates can be fermented to bioethanol after pretreatment process. Efficient pretreatment of the biomass is one of the major requirements for commercialization of the algal based biofuels. In present study the microalga, M. aeruginsa was used for pretreatment optimization and bioethanol production. Treatment of algal biomass with CaO before acid and/or enzymatic hydrolysis enhanced the degradation of algal cells. Monomeric sugars yield was increased more than twice when biomass was pretreated with CaO. Similarly, an increase was noted in the amount of fermentable sugars when biomass was subjected to invertase saccharification after acid or lysozyme pretreatment. Highest yield of fermentable sugars (16 mM/ml) in the centrifuged algal juice was obtained. 4 Different microorganisms' species were used individually and in combination for converting centrifuged algal juice to bioethanol. Comparatively higher yield of bioethanol (60 mM/ml) was obtained when the fermenter microorganisms were used in combination. The results demonstrated that M. arginase biomass can be efficiently pretreated to get higher yield of fermentable sugars for enhanced yield of bioethanol production.
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Affiliation(s)
- Muhammad Imran Khan
- Department of Biotechnology, Chonnam Natational University, San96-1, Dun-Duk Dong, Yeosu, Chonnam 550-749 Korea
| | - Moon Geon Lee
- Department of Biotechnology, Chonnam Natational University, San96-1, Dun-Duk Dong, Yeosu, Chonnam 550-749 Korea
| | - Jin Hyuk Shin
- Department of Biotechnology, Chonnam Natational University, San96-1, Dun-Duk Dong, Yeosu, Chonnam 550-749 Korea
| | - Jong Deog Kim
- Department of Biotechnology, Chonnam Natational University, San96-1, Dun-Duk Dong, Yeosu, Chonnam 550-749 Korea
- Research Center on Anti-Obesity and Health Care, Chonnam National University, San96-1, Dun-Duk Dong, Yeosu, Chonnam 550-749 Korea
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Enhancing the Feasibility of Microcystis aeruginosa as a Feedstock for Bioethanol Production under the Influence of Various Factors. BIOMED RESEARCH INTERNATIONAL 2016; 2016:4540826. [PMID: 27556034 PMCID: PMC4983350 DOI: 10.1155/2016/4540826] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 05/04/2016] [Indexed: 11/17/2022]
Abstract
Microcystis aeruginosa, a freshwater microalga, is capable of producing and accumulating different types of sugars in its biomass which make it a good feedstock for bioethanol production. Present study aims to investigate the effect of different factors increasing growth rate and carbohydrates productivity of M. aeruginosa. MF media (modified BG11 media) and additional ingredients such as aminolevulinic acid (2 mM), lysine (2.28 mM), alanine (1 mM), and Naphthalene acetic acid (1 mM) as cytokine promoted M. aeruginosa growth and sugar contents. Salmonella showed growth-assisting effect on M. aeruginosa. Enhanced growth rate and carbohydrates contents were observed in M. aeruginosa culture grown at 25°C under red LED light of 90 μmolm−2s−1 intensity. More greenish and carbohydrates rich M. aeruginosa biomass was prepared (final OD660 nm = 2.21 and sugar contents 10.39 mM/mL) as compared to control (maximum OD660 nm = 1.4 and sugar contents 3 mM/mL). The final algae biomass was converted to algae juice through a specific pretreatment method. The resulted algae Juice was used as a substrate in fermentation process. Highest yield of bioethanol (50 mM/mL) was detected when Brettanomyces custersainus, Saccharomyces cerevisiae, and Pichia stipitis were used in combinations for fermentation process as compared to their individual fermentation. The results indicated the influence of different factors on the growth rate and carbohydrates productivity of M. aeruginosa and its feasibility as a feedstock for fermentative ethanol production.
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Kannuchamy S, Mukund N, Saleena LM. Genetic engineering of Clostridium thermocellum DSM1313 for enhanced ethanol production. BMC Biotechnol 2016; 16 Suppl 1:34. [PMID: 27213504 PMCID: PMC4896269 DOI: 10.1186/s12896-016-0260-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Background The twin problem of shortage in fossil fuel and increase in environmental pollution can be partly addressed by blending of ethanol with transport fuel. Increasing the ethanol production for this purpose without affecting the food security of the countries would require the use of cellulosic plant materials as substrate. Clostridium thermocellum is an anaerobic thermophilic bacterium with cellulolytic property and the ability to produce ethanol. But its application as biocatalyst for ethanol production is limited because pyruvate ferredoxin oxidoreductase, which diverts pyruvate to ethanol production pathway, has low affinity to the substrate. Therefore, the present study was undertaken to genetically modify C. thermocellum for enhancing its ethanol production capacity by transferring pyruvate carboxylase (pdc) and alcohol dehydrogenase (adh) genes of the homoethanol pathway from Zymomonas mobilis. Results The pdc and adh genes from Z. mobilis were cloned in pNW33N, and transformed to Clostridium thermocellum DSM 1313 by electroporation to generate recombinant CTH-pdc, CTH-adh and CTH-pdc-adh strains that carried heterologous pdc, adh, and both genes, respectively. The plasmids were stably maintained in the recombinant strains. Though both pdc and adh were functional in C. thermocellum, the presence of adh severely limited the growth of the recombinant strains, irrespective of the presence or absence of the pdc gene. The recombinant CTH-pdc strain showed two-fold increase in pyruvate carboxylase activity and ethanol production when compared with the wild type strain. Conclusions Pyruvate decarboxylase gene of the homoethanol pathway from Z mobilis was functional in recombinant C. thermocellum strain and enhanced its ability to produced ethanol. Strain improvement and bioprocess optimizations may further increase the ethanol production from this recombinant strain.
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Affiliation(s)
- Saranyah Kannuchamy
- Department of Bioinformatics, School of Bioengineering, SRM University, Kattankulathur, 603203, Tamil Nadu, India
| | - Nisha Mukund
- Department of Bioinformatics, School of Bioengineering, SRM University, Kattankulathur, 603203, Tamil Nadu, India
| | - Lilly M Saleena
- Department of Bioinformatics, School of Bioengineering, SRM University, Kattankulathur, 603203, Tamil Nadu, India.
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Yaacob N, Mohamad Ali MS, Salleh AB, Abdul Rahman NA. Effects of glucose, ethanol and acetic acid on regulation of ADH2 gene from Lachancea fermentati. PeerJ 2016; 4:e1751. [PMID: 26989608 PMCID: PMC4793307 DOI: 10.7717/peerj.1751] [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] [Received: 08/04/2015] [Accepted: 02/12/2016] [Indexed: 12/05/2022] Open
Abstract
Background. Not all yeast alcohol dehydrogenase 2 (ADH2) are repressed by glucose, as reported in Saccharomyces cerevisiae. Pichia stipitis ADH2 is regulated by oxygen instead of glucose, whereas Kluyveromyces marxianus ADH2 is regulated by neither glucose nor ethanol. For this reason, ADH2 regulation of yeasts may be species dependent, leading to a different type of expression and fermentation efficiency. Lachancea fermentati is a highly efficient ethanol producer, fast-growing cells and adapted to fermentation-related stresses such as ethanol and organic acid, but the metabolic information regarding the regulation of glucose and ethanol production is still lacking. Methods. Our investigation started with the stimulation of ADH2 activity from S. cerevisiae and L. fermentati by glucose and ethanol induction in a glucose-repressed medium. The study also embarked on the retrospective analysis of ADH2 genomic and protein level through direct sequencing and sites identification. Based on the sequence generated, we demonstrated ADH2 gene expression highlighting the conserved NAD(P)-binding domain in the context of glucose fermentation and ethanol production. Results. An increase of ADH2 activity was observed in starved L. fermentati (LfeADH2) and S. cerevisiae (SceADH2) in response to 2% (w/v) glucose induction. These suggest that in the presence of glucose, ADH2 activity was activated instead of being repressed. An induction of 0.5% (v/v) ethanol also increased LfeADH2 activity, promoting ethanol resistance, whereas accumulating acetic acid at a later stage of fermentation stimulated ADH2 activity and enhanced glucose consumption rates. The lack in upper stream activating sequence (UAS) and TATA elements hindered the possibility of Adr1 binding to LfeADH2. Transcription factors such as SP1 and RAP1 observed in LfeADH2 sequence have been implicated in the regulation of many genes including ADH2. In glucose fermentation, L. fermentati exhibited a bell-shaped ADH2 expression, showing the highest expression when glucose was depleted and ethanol-acetic acid was increased. Meanwhile, S. cerevisiae showed a constitutive ADH2 expression throughout the fermentation process. Discussion. ADH2 expression in L. fermentati may be subjected to changes in the presence of non-fermentative carbon source. The nucleotide sequence showed that ADH2 transcription could be influenced by other transcription genes of glycolysis oriented due to the lack of specific activation sites for Adr1. Our study suggests that if Adr1 is not capable of promoting LfeADH2 activation, the transcription can be controlled by Rap1 and Sp1 due to their inherent roles. Therefore in future, it is interesting to observe ADH2 gene being highly regulated by these potential transcription factors and functioned as a promoter for yeast under high volume of ethanol and organic acids.
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Affiliation(s)
- Norhayati Yaacob
- Department of Biochemistry, Universiti Putra Malaysia, Malaysia; Enzyme and Microbial Technology Research Centre, Universiti Putra Malaysia, Serdang, Malaysia
| | - Mohd Shukuri Mohamad Ali
- Department of Biochemistry, Universiti Putra Malaysia, Malaysia; Enzyme and Microbial Technology Research Centre, Universiti Putra Malaysia, Serdang, Malaysia
| | - Abu Bakar Salleh
- Department of Biochemistry, Universiti Putra Malaysia, Malaysia; Enzyme and Microbial Technology Research Centre, Universiti Putra Malaysia, Serdang, Malaysia
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Chintagunta AD, Jacob S, Banerjee R. Integrated bioethanol and biomanure production from potato waste. WASTE MANAGEMENT (NEW YORK, N.Y.) 2016; 49:320-325. [PMID: 26316099 DOI: 10.1016/j.wasman.2015.08.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 07/23/2015] [Accepted: 08/10/2015] [Indexed: 06/04/2023]
Abstract
Disposal of potato processing waste and the problem of pollution associated with it is a vital issue that is being faced by the potato processing plants. The conventional peeling methods presently followed in the processing plants for removing the potato peel, also result in the loss of some portion of the mash which is rich in starch. Indiscriminate discharge of the waste causes detrimental effects in the environment, so this problem can be resolved by successful utilization of the waste for the generation of value added products. Hence, the present work focuses on integrated production of bioethanol and biomanure to utilize the waste completely leading to zero waste generation. The first part of the work describes a comparative study of ethanol production from potato peel and mash wastes by employing co-culture of Aspergillus niger and Saccharomyces cerevisiae at various incubation time (24-120 h) instead of application of enzymes. The solid state fermentation of potato peel and mash inoculated with co-culture, resulted in bioethanol production of 6.18% (v/v) and 9.30% (v/v) respectively. In the second part of the work, the residue obtained after ethanol production was inoculated with seven different microorganisms (Nostoc muscorum, Fischerella muscicola, Anabaena variabilis, Aulosira fertilissima, Cylindrospermum muscicola, Azospirillium lipoferum, Azotobacter chroococcum) and mixture of all the organisms in equal ratio for nitrogen (N), phosphorous (P) and potassium (K) enrichment. Among them, A. variabilis was found to enrich N, P and K content of the residue by nearly 7.66, 21.66 and 15 fold than that of the initial content, ultimately leading to improved N:P:K ratio of approximately 2:1:1. The application of simultaneous saccharification and fermentation (SSF) for the conversion of potato waste to ethanol and enrichment of residue obtained after ethanol production with microorganisms to be used as manure envisages environmental sustainability.
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Affiliation(s)
- Anjani Devi Chintagunta
- Advanced Technology Development Centre, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Samuel Jacob
- Agricultural & Food Engineering Department, Indian Institute of Technology, Kharagpur 721302, West Bengal, India
| | - Rintu Banerjee
- Agricultural & Food Engineering Department, Indian Institute of Technology, Kharagpur 721302, West Bengal, India.
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Optimization of Process Parameters for Formulation of Ayurvedic Fermented Medicine Arjunarishta by Response Surface Methodology. J Pharm Innov 2016. [DOI: 10.1007/s12247-015-9242-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Zabed H, Faruq G, Boyce AN, Sahu JN, Ganesan P. Evaluation of high sugar containing corn genotypes as viable feedstocks for decreasing enzyme consumption during dry-grind ethanol production. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2015.06.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Randive DS, Sayyad SF, Bhinge SD, Bhutkar MA. Preparation of Arjunāriṣṭa Using Microbes Isolated from Woodfordia fruticosa Flowers (Dhayati). Anc Sci Life 2016; 36:42-47. [PMID: 28182028 PMCID: PMC5255970 DOI: 10.4103/0257-7941.195405] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Objective: To verify the utility of isolated fermentative microbes from Woodfordia fruticosa flowers for preparation of Arjunāriṣṭa formulation and its comparative evaluation with the same formulation prepared by traditional method. Methodology: In the present technique, isolated colonies of microorganisms from Woodfordia fruticosa (Dhātakī) flowers on Saubroad dextrose media were separated and suspended in sterile water. This suspension was aseptically added in previously sterilized mixtures containing all intended ingredients for Arjunāriṣṭa which was thereafter incubated for 20 days at 37°C to achieve optimal fermentation. The formulation thus obtained was further subjected to various evaluation tests. Result: Arjunāriṣṭa was prepared using a new approach, and in that, isolated microorganisms from the flowers of Woodfordia fruticosa (Dhātakī) were used. It was found that the new approach was successful in generating approximately same quantities of alcohol content in comparison with traditional methods which have shown varying concentration of alcoholic content. Moreover, the new process prevents the growth of unwanted microbes thus, optimizing standards for purity and safety of the formulation. Conclusion: The formulation prepared by a new procedure showed marked uniformity for different parameters such as alcohol production, total phenol content, total solid content as compared to that prepared by the traditional method. Similarly, the results of thin layer chromatography, high performance thin layer chromatography showed marked uniformity related to quality, safety, efficacy, and reproducibility of the new method as compared to the traditional one. Thus, the modern technique was found to show reproducibility and facilitate easier quality assessment.
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Affiliation(s)
- Dheeraj S Randive
- Department of Pharmaceutics, Rajarambapu College of Pharmacy, Sangli, Maharashtra, India
| | - Sadik F Sayyad
- Department of Pharmaceutics, Amrutvahini College of Pharmacy, Ahmednagar, Maharashtra, India
| | - Somnath Devidas Bhinge
- Department of Pharmaceutical Chemistry, Rajarambapu College of Pharmacy, Sangli, Maharashtra, India
| | - Mangesh A Bhutkar
- Department of Pharmaceutical Chemistry, Rajarambapu College of Pharmacy, Sangli, Maharashtra, India
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Utilization of Scenedesmus obliquus biomass as feedstock for biodiesel and other industrially important co-products: An integrated paradigm for microalgal biorefinery. ALGAL RES 2015. [DOI: 10.1016/j.algal.2015.09.009] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Vilela LDF, de Araujo VPG, Paredes RDS, Bon EPDS, Torres FAG, Neves BC, Eleutherio ECA. Enhanced xylose fermentation and ethanol production by engineered Saccharomyces cerevisiae strain. AMB Express 2015; 5:16. [PMID: 25852993 PMCID: PMC4385029 DOI: 10.1186/s13568-015-0102-y] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 02/09/2015] [Indexed: 11/10/2022] Open
Abstract
We have recently demonstrated that heterologous expression of a bacterial xylose isomerase gene (xylA) of Burkholderia cenocepacia enabled a laboratorial Saccharomyces cerevisiae strain to ferment xylose anaerobically, without xylitol accumulation. However, the recombinant yeast fermented xylose slowly. In this study, an evolutionary engineering strategy was applied to improve xylose fermentation by the xylA-expressing yeast strain, which involved sequential batch cultivation on xylose. The resulting yeast strain co-fermented glucose and xylose rapidly and almost simultaneously, exhibiting improved ethanol production and productivity. It was also observed that when cells were grown in a medium containing higher glucose concentrations before being transferred to fermentation medium, higher rates of xylose consumption and ethanol production were obtained, demonstrating that xylose utilization was not regulated by catabolic repression. Results obtained by qPCR demonstrate that the efficiency in xylose fermentation showed by the evolved strain is associated, to the increase in the expression of genes HXT2 and TAL1, which code for a low-affinity hexose transporter and transaldolase, respectively. The ethanol productivity obtained after the introduction of only one genetic modification and the submission to a one-stage process of evolutionary engineering was equivalent to those of strains submitted to extensive metabolic and evolutionary engineering, providing solid basis for future applications of this strategy in industrial strains.
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Das SP, Ravindran R, Deka D, Jawed M, Das D, Goyal A. Bioethanol production from leafy biomass of mango (Mangifera indica) involving naturally isolated and recombinant enzymes. Prep Biochem Biotechnol 2014; 43:717-34. [PMID: 23768115 DOI: 10.1080/10826068.2013.773342] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
The present study describes the usage of dried leafy biomass of mango (Mangifera indica) containing 26.3% (w/w) cellulose, 54.4% (w/w) hemicellulose, and 16.9% (w/w) lignin, as a substrate for bioethanol production from Zymomonas mobilis and Candida shehatae. The substrate was subjected to two different pretreatment strategies, namely, wet oxidation and an organosolv process. An ethanol concentration (1.21 g/L) was obtained with Z. mobilis in a shake-flask simultaneous saccharification and fermentation (SSF) trial using 1% (w/v) wet oxidation pretreated mango leaves along with mixed enzymatic consortium of Bacillus subtilis cellulase and recombinant hemicellulase (GH43), whereas C. shehatae gave a slightly higher (8%) ethanol titer of 1.31 g/L. Employing 1% (w/v) organosolv pretreated mango leaves and using Z. mobilis and C. shehatae separately in the SSF, the ethanol titers of 1.33 g/L and 1.52 g/L, respectively, were obtained. The SSF experiments performed with 5% (w/v) organosolv-pretreated substrate along with C. shehatae as fermentative organism gave a significantly enhanced ethanol titer value of 8.11 g/L using the shake flask and 12.33 g/L at the bioreactor level. From the bioreactor, 94.4% (v/v) ethanol was recovered by rotary evaporator with 21% purification efficiency.
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Affiliation(s)
- Saprativ P Das
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam, India
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Statistical Optimization of Fermentation Process Parameters by Taguchi Orthogonal Array Design for Improved Bioethanol Production. ACTA ACUST UNITED AC 2014. [DOI: 10.1155/2014/419674] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The statistical optimization of different fermentation process parameters in SSF of mixed MAA and organosolv pretreated 1% (w v−1) wild grass, namely, recombinant Clostridium thermocellum hydrolytic enzymes’ volume (GH5 cellulase, GH43 hemicellulase), fermentative microbes’ inoculum volume (Saccharomyces cerevisiae, Candida shehatae), pH, and temperature, was accomplished by Taguchi orthogonal array design. The optimized parameters in 100 mL of fermentation medium were (%, v v−1) as follows: 1.0, recombinant GH5 cellulase (5.7 mg−1, 0.45 mg mL−1); 2.0, recombinant GH43 hemicellulase (3.7 U mg−1, 0.32 mg mL−1); 1.5, S. cerevisiae (3.9 × 108 cells mL−1); 0.25, C. shehatae (2.7 × 107 cells mL−1); pH, 4.3; and temperature, 35∘C. pH with p-value 0.001 was found to be the most significant factor affecting SSF. The ethanol titre obtained in Taguchi optimized shake flask SSF was 2.0 g L−1 implying a 1.3-fold increase as compared to ethanol titre of 1.5 g L−1 in unoptimized shake flask SSF. A 1.5-fold gain in ethanol titre (3.1 g L−1) was obtained with the same substrate concentration in lab scale bioreactor on scaling up the shake flask SSF with Taguchi optimized process parameters.
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Ghatak AA, Chaturvedi PA, Desai NS. Indian Grape Wines: A Potential Source of Phenols, Polyphenols, and Antioxidants. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2013. [DOI: 10.1080/10942912.2012.675608] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Das SP, Deka D, Ghosh A, Das D, Jawed M, Goyal A. Scale up and efficient bioethanol production involving recombinant cellulase (Glycoside hydrolase family 5) from Clostridium thermocellum. ACTA ACUST UNITED AC 2013. [DOI: 10.1186/2043-7129-1-19] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Abstract
Background
Lignocellulose degrading fungal enzymes have been in use at industrial level for more than three decades. However, the main drawback is the high cost of the commercially available Trichoderma reesei cellulolytic enzymes.
Results
The hydrolytic performance of a novel Clostridium thermocellum cellulolytic recombinant cellulase expressed in Escherichia coli cells was compared with the naturally isolated cellulases in different modes of fermentation trials using steam explosion pretreated thatch grass and Zymomonas mobilis. Fourier transform infrared (FT-IR) spectroscopic analysis confirmed the efficiency of steam explosion pretreatment in significant release of free glucose moiety from complex lignocellulosic thatch grass. The recombinant GH5 cellulase with 1% (w v-1) substrate and Z. mobilis in shake flask separate hydrolysis and fermentation (SHF) and simultaneous saccharification and fermentation (SSF) trials demonstrated highest ethanol titre (0.99 g L-1, 1.2 g L-1) as compared to Bacillus subtilis (0.51 g L-1, 0.72 g L-1) and Trichoderma reesei (0.67 g L-1, 0.94 g L-1). A 5% (w v-1) substrate with recombinant enzyme in shake flask SSF resulted in a 7 fold increment of ethanol titre (8.8 g L-1). The subsequent scale up in a 2 L bioreactor with 1 L working volume yielded 16.13 g L-1 ethanol titre implying a 2 fold upturn. The rotary evaporator based product recovery from bioreactor contributed 94.4 (%, v v-1) pure ethanol with purification process efficiency of 22.2%.
Conclusions
The saccharification of steam exploded thatch grass (Hyparrhenia rufa) by recombinant cellulase (GH5) along with Z. mobilis in bioethanol production was studied for the first time. The effective pretreatment released substantial hexose sugars from cellulose as confirmed by FT-IR studies. In contrast to two modes of fermentation, SSF processes utilizing recombinant C. thermocellum enzymes have the capability of yielding a value-added product, bioethanol with the curtailment of the production costs in industry.
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Lignocellulosic fermentation of wild grass employing recombinant hydrolytic enzymes and fermentative microbes with effective bioethanol recovery. BIOMED RESEARCH INTERNATIONAL 2013; 2013:386063. [PMID: 24089676 PMCID: PMC3782061 DOI: 10.1155/2013/386063] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Accepted: 08/04/2013] [Indexed: 11/18/2022]
Abstract
Simultaneous saccharification and fermentation (SSF) studies of steam exploded and alkali pretreated different leafy biomass were accomplished by recombinant Clostridium thermocellum hydrolytic enzymes and fermentative microbes for bioethanol production. The recombinant C. thermocellum GH5 cellulase and GH43 hemicellulase genes expressed in Escherichia coli cells were grown in repetitive batch mode, with the aim of enhancing the cell biomass production and enzyme activity. In batch mode, the cell biomass (A600 nm) of E. coli cells and enzyme activities of GH5 cellulase and GH43 hemicellulase were 1.4 and 1.6 with 2.8 and 2.2 U·mg−1, which were augmented to 2.8 and 2.9 with 5.6 and 3.8 U·mg−1 in repetitive batch mode, respectively. Steam exploded wild grass (Achnatherum hymenoides) provided the best ethanol titres as compared to other biomasses. Mixed enzyme (GH5 cellulase, GH43 hemicellulase) mixed culture (Saccharomyces cerevisiae, Candida shehatae) system gave 2-fold higher ethanol titre than single enzyme (GH5 cellulase) single culture (Saccharomyces cerevisiae) system employing 1% (w/v) pretreated substrate. 5% (w/v) substrate gave 11.2 g·L−1 of ethanol at shake flask level which on scaling up to 2 L bioreactor resulted in 23 g·L−1 ethanol. 91.6% (v/v) ethanol was recovered by rotary evaporator with 21.2% purification efficiency.
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Characterization of Indian beers: chemical composition and antioxidant potential. Journal of Food Science and Technology 2013; 52:1414-23. [PMID: 25745209 DOI: 10.1007/s13197-013-1152-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 08/08/2013] [Accepted: 08/15/2013] [Indexed: 10/26/2022]
Abstract
Chemical composition, antioxidant potential and corresponding lipid preoxidation of Indian commercial beers were evaluated. The presence of polyphenolic compounds such as tannic acid, gallic acid, catechol, vanillin, caffeic acid, quercetin, p-coumaric acid and rutin was quantified using LC-MS while the organic acids including tartaric, malic, acetic, citric and succinic acids were analysed using HPLC. Beer sample B8 had the greatest concentration of phenolic and flavonoid components (0.620 ± 0.084 mg/mL and 0.379 ± 0.020 mg/mL respectively) among the beer samples studied. The DPPH radical scavenging activity was observed in the range of 68.34 ± 0.85 % to 89.90 ± 0.71 % and ABTS radical cation scavenging activity was in the range of 59.75 ± 0.20 % to 76.22 ± 0.50 %. Percent protection in lipid peroxidation was quantified to be maximum (54.45 ± 3.39 %) in sample B5. Total phenolic content positively correlates with antioxidant assays, DPPH and ABTS (r = 0.35 and r = 0.58 respectively) with p < 0.001 and also with lipid peroxidation (r = 0.04) with p < 0.001. Negative correlation was observed between total flavonoid content with ABTS and lipid peroxidation (r = -0.1 and r = -0.05) respectively. The process of brewing warrants additional research to determine how the concentration of selected phenolic compounds can be increased.
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Zhu LW, Li XH, Zhang L, Li HM, Liu JH, Yuan ZP, Chen T, Tang YJ. Activation of glyoxylate pathway without the activation of its related gene in succinate-producing engineered Escherichia coli. Metab Eng 2013; 20:9-19. [PMID: 23876414 DOI: 10.1016/j.ymben.2013.07.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2012] [Revised: 04/05/2013] [Accepted: 07/11/2013] [Indexed: 10/26/2022]
Abstract
For the first time, glyoxylate pathway in the biosynthesis of succinate was activated without the genetic manipulations of any gene related with glyoxylate pathway. Furthermore, the inactivation of succinate biosynthesis by-products genes encoding acetate kinase (ackA) and phosphotransacetylase (pta) was proven to be the key factor to activate glyoxylate pathway in the metabolically engineered Escherichia coli under anaerobic conditions. In order to enhance the succinate biosynthesis specifically, the genes (i.e., ldhA, ptsG, ackA-pta, focA-pflB, adhE) that disrupt by-products biosynthesis pathways were combinatorially deleted, while the E. coli malate dehydrogenase (MDH) was overexpression. The highest succinate production of 150.78 mM was obtained with YJ003 (ΔldhA, ptsG, ackA-pta), which were 5-folds higher than that obtained with wild type control strain DY329 (25.13 mM). For further understand the metabolic response as a result of several genetic manipulations, an anaerobic stoichiometric model that takes into account the glyoxylate pathway have successfully been implemented to estimate the intracellular fluxes in various recombinant E. coli. The fraction to the glyoxylate pathway from OAA in DY329 was 0 and 31% in YJ003, which indicated that even without the absence of the iclR mutation; the glyoxylate pathway was also activated by deleting the by-products biosynthetic genes, and to be responsible for the higher succinate yields. For further strengthen glyoxylate pathway, a two-stage fed-batch fermentation process was developed by using a 600 g l(-1) glucose feed to achieve a cell growth rate of 0.07 h(-1) in aerobic fermentation, and using a 750 g l(-1) glucose feed to maintain the residual glucose concentration around 40 g l(-1) when its residual level decreased to 10gl(-1) in anaerobic fermentation. The best mutant strain YJ003/pTrc99A-mdh produces final succinate concentration of 274 mM by fed-batch culture, which was 10-folds higher than that obtained with wild type control strain DY329. This study discovered that glyoxylate pathway could be activated by deleting glyoxylate pathway irrelevant genes (i.e., genes encoding acetate and lactate) and consequently the succinate biosynthesis was effectively improved. This work provides useful information for the modification of metabolic pathway to improve succinate production.
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Affiliation(s)
- Li-Wen Zhu
- Key Laboratory of Fermentation Engineering (Ministry of Education), Hubei University of Technology, Wuhan 430068, China
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Deka D, Das SP, Sahoo N, Das D, Jawed M, Goyal D, Goyal A. Enhanced Cellulase Production from Bacillus subtilis by Optimizing Physical Parameters for Bioethanol Production. ISRN BIOTECHNOLOGY 2013; 2013:965310. [PMID: 25937985 PMCID: PMC4393054 DOI: 10.5402/2013/965310] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2012] [Accepted: 01/12/2013] [Indexed: 11/30/2022]
Abstract
Effect of physical parameters such as initial pH, agitation (rpm), and temperature (°C) for cellulase production from Bacillus subtilis AS3 was investigated. Central composite design of experiments followed by multiple desirability function was applied for the optimization of cellulase activity and cell growth. The effect of the temperature and agitation was found to be significant among the three independent variables. The optimum levels of initial pH, temperature, and agitation for alkaline carboxymethylcellulase (CMCase) production predicted by the model were 7.2, 39°C, and 121 rpm, respectively. The CMCase activity with unoptimized physical parameters and previously optimized medium composition was 0.43 U/mL. The maximum activity (0.56 U/mL) and cell growth (2.01 mg/mL) predicted by the model were in consensus with values (0.57 U/mL, 2.1 mg/mL) obtained using optimized medium and optimal values of physical parameters. After optimization, 33% enhancement in CMCase activity (0.57 U/mL) was recorded. On scale-up of cellulase production process in bioreactor with all the optimized conditions, an activity of 0.75 U/mL was achieved. Consequently, the bacterial cellulase employed for bioethanol production expending (5%, w/v) NaOH-pretreated wild grass with Zymomonas mobilis yielded an utmost ethanol titre of 7.56 g/L and 11.65 g/L at shake flask and bioreactor level, respectively.
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Affiliation(s)
- Deepmoni Deka
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Saprativ P Das
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Naresh Sahoo
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Debasish Das
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Mohammad Jawed
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
| | - Dinesh Goyal
- Department of Biotechnology and Environmental Sciences, Thapar University, Patiala, Punjab 147004, India
| | - Arun Goyal
- Centre for the Environment, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India ; Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, Assam 781039, India
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Navya PN, Pushpa SM. Production, statistical optimization and application of endoglucanase from Rhizopus stolonifer utilizing coffee husk. Bioprocess Biosyst Eng 2012; 36:1115-23. [DOI: 10.1007/s00449-012-0865-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Accepted: 11/19/2012] [Indexed: 10/27/2022]
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Bioethanol production involving recombinant C. thermocellum hydrolytic hemicellulase and fermentative microbes. Appl Biochem Biotechnol 2012; 167:1475-88. [PMID: 22383050 DOI: 10.1007/s12010-012-9618-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Accepted: 02/14/2012] [Indexed: 10/28/2022]
Abstract
The enhancement of the biomass productivity of Escherichia coli cells harbouring the truncated 903 bp gene designated as glycoside hydrolase family 43 (GH43) from Clostridium thermocellum showing hemicellulase activity along with its further use in simultaneous saccharification and fermentation (SSF) process is described. (Phosphoric acid) H(3)PO(4)-acetone treatment and ammonia fibre expansion (AFEX) were the pretreatment strategies employed on the leafy biomass of mango, poplar, neem and asoka among various substrates owing to their high hemicellulose content. GH43 showed optimal activity at a temperature of 50 °C, pH 5.4 with stability over a pH range of 5.0-6.2. A 4-fold escalation in growth of the recombinant E. coli cells was observed when grown using repeated batch strategy in LB medium supplemented with glucose as co-substrate. Candida shehatae utilizing pentose sugars was employed for bioethanol production. AFEX pretreatment proved to be better over acid-acetone technique. The maximum ethanol concentration (1.44 g/L) was achieved for AFEX pretreated mango (1%, w/v) followed by poplar with an ethanol titre (1.32 g/L) in shake flask experiments. A 1.5-fold increase in ethanol titre (2.11 g/L) was achieved with mango (1%, w/v) in a SSF process using a table top 2-L bioreactor with 1 L working volume.
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