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Kemmer A, Cai L, Born S, Cruz Bournazou MN, Neubauer P. Enzyme-Mediated Exponential Glucose Release: A Model-Based Strategy for Continuous Defined Fed-Batch in Small-Scale Cultivations. Bioengineering (Basel) 2024; 11:107. [PMID: 38391593 PMCID: PMC10886149 DOI: 10.3390/bioengineering11020107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/05/2024] [Accepted: 01/18/2024] [Indexed: 02/24/2024] Open
Abstract
Miniaturized cultivation systems offer the potential to enhance experimental throughput in bioprocess development. However, they usually lack the miniaturized pumps necessary for fed-batch mode, which is commonly employed in industrial bioprocesses. An alternative are enzyme-mediated glucose release systems from starch-derived polymers, facilitating continuous glucose supply. Nevertheless, while the glucose release, and thus the feed rate, is controlled by the enzyme concentration, it also strongly depends on the type of starch derivative, and the culture conditions as well as pH and temperature. So far it was not possible to implement controlled feeding strategies (e.g., exponential feeding). In this context, we propose a model-based approach to achieve precise control over enzyme-mediated glucose release in cultivations. To this aim, an existing mathematical model was integrated into a computational framework to calculate setpoints for enzyme additions. We demonstrate the ability of the tool to maintain different pre-defined exponential growth rates during Escherichia coli cultivations in parallel mini-bioreactors integrated into a robotic facility. Although in this case study, the intermittent additions of enzyme and dextrin were performed by a liquid handler, the approach is adaptable to manual applications. Thus, we present a straightforward and robust approach for implementing defined continuous fed-batch processes in small-scale systems, where continuous feeding was only possible with low accuracy or high technical efforts until now.
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Affiliation(s)
- Annina Kemmer
- Institute of Biotechnology, Chair of Bioprocess Engineering, Technische Universität Berlin, 13355 Berlin, Germany
| | - Linda Cai
- Institute of Biotechnology, Chair of Bioprocess Engineering, Technische Universität Berlin, 13355 Berlin, Germany
| | - Stefan Born
- Institute of Biotechnology, Chair of Bioprocess Engineering, Technische Universität Berlin, 13355 Berlin, Germany
| | - M Nicolas Cruz Bournazou
- Institute of Biotechnology, Chair of Bioprocess Engineering, Technische Universität Berlin, 13355 Berlin, Germany
| | - Peter Neubauer
- Institute of Biotechnology, Chair of Bioprocess Engineering, Technische Universität Berlin, 13355 Berlin, Germany
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2
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Kinetic Model for Simultaneous Saccharification and Fermentation of Brewers’ Spent Grain Liquor Using Lactobacillus delbrueckii Subsp. lactis. BIOTECHNOL BIOPROC E 2021. [DOI: 10.1007/s12257-020-0153-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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3
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Wang D, Hou F, Ma X, Chen W, Yan L, Ding T, Ye X, Liu D. Study on the mechanism of ultrasound-accelerated enzymatic hydrolysis of starch: Analysis of ultrasound effect on different objects. Int J Biol Macromol 2020; 148:493-500. [PMID: 31923513 DOI: 10.1016/j.ijbiomac.2020.01.064] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 12/24/2019] [Accepted: 01/06/2020] [Indexed: 12/27/2022]
Abstract
Enzymatic hydrolysis of starch is an important process in the food industry. In the present work, ultrasound was introduced in glucoamylase pretreatment, starch pretreatment and mixed reaction system treatment to enhance starch hydrolysis efficiency. These different processes were studied to explore the mechanism of ultrasound in promoting enzymatic reactions. The hydrolysis degree of starch was determined via measuring the reducing sugar yield. Ultrasound caused enzyme inactivation under high temperatures, high ultrasonic power and long-time treatment, especially at high temperatures exceeding 65 °C. Ultrasound pretreatment of starch before enzymolysis led to the furtherance of starch hydrolysis degree. Meanwhile, sonicating the mixed enzymatic reaction system below 65 °C promoted starch hydrolysis significantly, inducing more than five- fold growth in the degree of starch hydrolysis as much as the ultrasound pretreatment caused. Molecular weights analysis conducted by the MALLS system reflected the enormous damage of starch molecules caused by ultrasound. The amylose contents and chain length distributions of samples were separately analyzed by iodine binding method and size exclusion chromatography. The results of the two experiments illustrate that ultrasound could promote the enzymatic hydrolysis of amylopectin, which is harder for glucoamylase to hydrolyze compared to amylose.
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Affiliation(s)
- Danli Wang
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Furong Hou
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Xiaobin Ma
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Weijun Chen
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Lufeng Yan
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China
| | - Tian Ding
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R & D Center for Food Technology and Equipment, Hangzhou 310058, China
| | - Xingqian Ye
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R & D Center for Food Technology and Equipment, Hangzhou 310058, China; Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, China
| | - Donghong Liu
- College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou 310058, China; National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R & D Center for Food Technology and Equipment, Hangzhou 310058, China; Fuli Institute of Food Science, Zhejiang University, Hangzhou 310058, China.
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Wu H, Li J, Yang H, Liao Q, Fu Q, Liu Z. Hydrothermal treatment of Chlorella sp.: Influence on biochemical methane potential, microbial function and biochemical metabolism. BIORESOURCE TECHNOLOGY 2019; 289:121746. [PMID: 31323709 DOI: 10.1016/j.biortech.2019.121746] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 06/28/2019] [Accepted: 06/29/2019] [Indexed: 06/10/2023]
Abstract
This study focused on the effect of hydrothermal treatment (HTT) on biochemical methane potential (BMP) of Chlorella sp. The BMP was in the range of 119.16-485.90 mLCH4/gVS, and increased by 80.31%-210.16% after HTT, while reduced 23.94% at hydrothermal treatment severity (HTS) 5.21. The cell wall was more greatly disrupted with increasing HTS, accompanied with the increase of volatile fatty acids (VFAs) and fermentation inhibitors (5-HMF and more complex chemical compositions) recoveries. The reducing sugar yields were 0.94-3.65% and obtained its maximum at a retention time of 30 min. Illumina MiSeq sequencing clarified that, the phylum Chloroflexi with functions of hydrolysis and acidogenesis, decreased with increasing HTS. The family Methanosaetaceae belonging to acetoclastic methanogens, had an unexpected decrease at HTS 5.21. As the response, VFAs concentration was less than 1 g/L after biochemical metabolism, while high concentrations of VFAs and inhibitors at HTS 5.21 led to the poor performance.
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Affiliation(s)
- Houkai Wu
- Laboratory of Environment-Enhancing Energy (E2E), College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing 100083, China
| | - Jiaming Li
- Laboratory of Environment-Enhancing Energy (E2E), College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing 100083, China
| | - Hao Yang
- Laboratory of Environment-Enhancing Energy (E2E), College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing 100083, China
| | - Qiang Liao
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China
| | - Qian Fu
- Key Laboratory of Low-grade Energy Utilization Technologies and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China
| | - Zhidan Liu
- Laboratory of Environment-Enhancing Energy (E2E), College of Water Resources and Civil Engineering, China Agricultural University, Beijing 100083, China; Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, Beijing 100083, China.
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Ghani M, Ansari A, Haider MS, Asif T, Ibrahim F, Qader SAU, Aman A. Purification and Characterization of a Thermostable Starch‐Saccharifying Alpha‐1,4‐Glucan‐Glucohydrolase Produced byBacillus licheniformis. STARCH-STARKE 2019. [DOI: 10.1002/star.201800352] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Maria Ghani
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE)University of Karachi Karachi 75270 Pakistan
| | - Asma Ansari
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE)University of Karachi Karachi 75270 Pakistan
| | - Muhammad Samee Haider
- Food and Marine Resource Research Centre, Pakistan Council of Scientific and Industrial Research (PCSIR) Laboratories Complex Karachi 75280 Pakistan
| | - Tayyaba Asif
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE)University of Karachi Karachi 75270 Pakistan
| | - Fariha Ibrahim
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE)University of Karachi Karachi 75270 Pakistan
| | - Shah Ali Ul Qader
- Department of BiochemistryUniversity of Karachi Karachi 75270 Pakistan
| | - Afsheen Aman
- The Karachi Institute of Biotechnology and Genetic Engineering (KIBGE)University of Karachi Karachi 75270 Pakistan
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6
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An Adaptive Fuzzy Feedforward-Feedback Control System Applied to a Saccharification Process. CHEMICAL PRODUCT AND PROCESS MODELING 2018. [DOI: 10.1515/cppm-2018-0014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In industrial bioprocess control, disturbance sources typically influences process variable regulation. These disturbances may reduce a system control performance or even affect the final bioproduct quality. Therefore, feedforward control is desired because it anticipates the effects caused by these disturbances in an attempt to keep the process variable at the setpoint value. However, designing a feedforward control law requires process modeling, which can be a tough task when dealing with bioprocesses that are intrinsically nonlinear and multivariable systems. Thus, an adaptive feedforward control law or other advanced control system is needed for satisfactory disturbance rejection. For this reason, a general fuzzy feedforward control system is proposed in this paper to replace the classical feedforward control, making it easier to implement the feedforward control action by avoiding nonlinear and multivariable process modeling. The adaptive fuzzy feedforward-feedback (A4FB) system was applied to a product concentration control loop in an enzymatic reactor, to reject disturbances caused by variations in the substrate and enzymatic solutions feed concentration. The results showed that the A4FB controller rejected much more disturbance effects than classical feedforward control law, demonstrating its advantage, supported by not only its simple implementation, but also its improved disturbance rejection.
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7
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Benavent-Gil Y, Román L, Gómez M, Rosell CM. Physicochemical Properties of Gels Obtained from Corn Porous Starches with Different Levels of Porosity. STARCH-STARKE 2018. [DOI: 10.1002/star.201800171] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Yaiza Benavent-Gil
- Institute of Agrochemistry and Food Technology (IATA-CSIC); C/ Agustin Escardino; 7, Paterna 46980 Valencia Spain
| | - Laura Román
- Food Technology Area; College of Agricultural Engineering; University of Valladolid; 34004 Palencia Spain
| | - Manuel Gómez
- Food Technology Area; College of Agricultural Engineering; University of Valladolid; 34004 Palencia Spain
| | - Cristina M. Rosell
- Institute of Agrochemistry and Food Technology (IATA-CSIC); C/ Agustin Escardino; 7, Paterna 46980 Valencia Spain
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8
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Towards improved predictions for the enzymatic chain-end scission of natural polymers by population balances: The need for a non-classical rate kernel. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2017.10.027] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Maltase entrapment approach as an efficient alternative to increase the stability and recycling efficiency of free enzyme within agarose matrix. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2016.04.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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10
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Izmirlioglu G, Demirci A. Strain selection and medium optimization for glucoamylase production from industrial potato waste by Aspergillus niger. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2016; 96:2788-2795. [PMID: 26333342 DOI: 10.1002/jsfa.7445] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Revised: 08/27/2015] [Accepted: 08/28/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND Glucoamylase is one of the most common enzymes used in the food industry to break down starch into its monomers. Glucoamylase production and its activity are highly dependent on medium composition. Starch is well known as a glucoamylase inducer, and utilization of industrial starchy potato waste is an inexpensive way of improving glucoamylase production. Since glucoamylase production is highly dependent on medium composition, in this study medium optimization for glucoamylase production was considered to enhance glucoamylase activity. RESULTS Among the evaluated microbial species, Aspergillus niger van Tieghem was found to be the best glucoamylase-producing fungus. The Plackett-Burman design was used to screen various medium ingredients, and malt extract, FeSO4 .7H2 O and CaCl2 ·2H2 O were found to have significant effects on glucoamylase production. Finally, malt extract, FeSO4 .7H2 O and CaCl2 .2H2 O were optimized by using a central composite design of response surface methodology. The results showed that the optimal medium composition for A. niger van Tieghem was 50 g L(-1) industrial waste potato mash supplemented with 51.82 g L(-1) malt extract, 9.27 g L(-1) CaCl2 ·2H2 O and 0.50 g L(-1) FeSO4 .7H2 O. CONCLUSION At the end of optimization, glucoamylase activity and glucose production were improved 126% and 98% compared to only industrial waste potato mash basal medium; 274.4 U mL(-1) glucoamylase activity and 41.7 g L(-1) glucose levels were achieved, respectively. © 2015 Society of Chemical Industry.
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Affiliation(s)
- Gulten Izmirlioglu
- Department of Agricultural and Biological Engineering, Pennsylvania State University, University Park, PA, 16802, USA
| | - Ali Demirci
- Department of Agricultural and Biological Engineering, Pennsylvania State University, University Park, PA, 16802, USA
- Huck Institutes of the Life Sciences, Pennsylvania State University, University Park, PA, 16802, USA
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11
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Celińska E, Borkowska M, Białas W. Evaluation of a recombinant insect-derived amylase performance in simultaneous saccharification and fermentation process with industrial yeasts. Appl Microbiol Biotechnol 2015; 100:2693-707. [PMID: 26545757 PMCID: PMC4761610 DOI: 10.1007/s00253-015-7098-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 10/11/2015] [Accepted: 10/13/2015] [Indexed: 12/18/2022]
Abstract
Starch is the dominant feedstock consumed for the bioethanol production, accounting for 60 % of its global production. Considering the significant contribution of bioethanol to the global fuel market, any improvement in its major operating technologies is economically very attractive. It was estimated that up to 40 % of the final ethanol unit price is derived from the energy input required for the substrate pre-treatment. Application of raw starch hydrolyzing enzymes (RSHE), combined with operation of the process according to a simultaneous saccharification and fermentation (SSF) strategy, constitutes the most promising solutions to the current technologies limitations. In this study, we expressed the novel RSHE derived from an insect in Saccharomyces cerevisiae strain dedicated for the protein overexpression. Afterwards, the enzyme performance was assessed in SSF process conducted by industrial ethanologenic or thermotolerant yeast species. Comparison of the insect-derived RSHE preparation with commercially available amylolytic RSH preparation was conducted. Our results demonstrate that the recombinant alpha-amylase from rice weevil can be efficiently expressed and secreted with its native signal peptide in S. cerevisiae INVSc-pYES2-Amy1 expression system (accounting for nearly 72 % of the strain’s secretome). Application of the recombinant enzyme-based preparation in SSF process secured sufficient amylolytic activity for the yeast cell propagation and ethanol formation from raw starch. (Oligo)saccharide profiles generated by the compared preparations differed with respect to homogeneity of the sugar mixtures. Concomitantly, as demonstrated by a kinetic model developed in this study, the kinetic parameters describing activity of the compared preparations were different.
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Affiliation(s)
- Ewelina Celińska
- Department of Biotechnology and Food Microbiology, Poznań University of Life Sciences, ul. Wojska Polskiego 48, 60-627, Poznań, Poland.
| | - Monika Borkowska
- Department of Biotechnology and Food Microbiology, Poznań University of Life Sciences, ul. Wojska Polskiego 48, 60-627, Poznań, Poland
| | - Wojciech Białas
- Department of Biotechnology and Food Microbiology, Poznań University of Life Sciences, ul. Wojska Polskiego 48, 60-627, Poznań, Poland
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12
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Ho YK, Doshi P, Yeoh HK, Ngoh GC. Interlinked population balance and cybernetic models for the simultaneous saccharification and fermentation of natural polymers. Biotechnol Bioeng 2015; 112:2084-105. [DOI: 10.1002/bit.25616] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Revised: 03/02/2015] [Accepted: 04/06/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Yong Kuen Ho
- Department of Chemical Engineering, Faculty of Engineering; University of Malaya; 50603 Kuala Lumpur Malaysia
| | - Pankaj Doshi
- National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 India
| | - Hak Koon Yeoh
- Department of Chemical Engineering, Faculty of Engineering; University of Malaya; 50603 Kuala Lumpur Malaysia
| | - Gek Cheng Ngoh
- Department of Chemical Engineering, Faculty of Engineering; University of Malaya; 50603 Kuala Lumpur Malaysia
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Nawaz MA, Karim A, Aman A, Marchetti R, Qader SAU, Molinaro A. Continuous degradation of maltose: improvement in stability and catalytic properties of maltase (α-glucosidase) through immobilization using agar-agar gel as a support. Bioprocess Biosyst Eng 2014; 38:631-8. [DOI: 10.1007/s00449-014-1302-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Accepted: 10/06/2014] [Indexed: 10/24/2022]
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14
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López-Pérez PA, Cuevas-Ortiz FA, Gómez-Acata RV, Aguilar-López R. Improving Bioethanol Production via Nonlinear Controller with Noisy Measurements. CHEM ENG COMMUN 2014. [DOI: 10.1080/00986445.2014.956737] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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15
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Yu HY, Li X. Characterization of an organic solvent-tolerant thermostable glucoamylase from a halophilic isolate, Halolactibacillus sp. SK71 and its application in raw starch hydrolysis for bioethanol production. Biotechnol Prog 2014; 30:1262-8. [PMID: 25138675 DOI: 10.1002/btpr.1978] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2014] [Revised: 06/14/2014] [Indexed: 11/10/2022]
Abstract
A halophilic bacterium Halolactibacillus sp. SK71 producing extracellular glucoamylase was isolated from saline soil of Yuncheng Salt Lake, China. Enzyme production was strongly influenced by the salinity of growth medium with maximum in the presence of 5% NaCl. The glucoamylase was purified to homogeneity with a molecular mass of 78.5 kDa. It showed broad substrate specificity and raw starch hydrolyzing activity. Analysis of hydrolysis products from soluble starch by thin-layer chromatography revealed that glucose was the sole end-product, indicating the enzyme was a true glucoamylase. Optimal enzyme activity was found to be at 70°C, pH 8.0, and 7.5% NaCl. In addition, it was highly active and stable over broad ranges of temperature (0-100°C), pH (7.0-12.0), and NaCl concentration (0-20%), showing excellent thermostable, alkali stable, and halotolerant properties. Furthermore, it displayed high stability in the presence of hydrophobic organic solvents. The purified glucoamylase was applied for raw corn starch hydrolysis and subsequent bioethanol production using Saccharomyces cerevisiae. The yield in terms of grams of ethanol produced per gram of sugar consumed was 0.365 g/g, with 71.6% of theoretical yield from raw corn starch. This study demonstrated the feasibility of using enzymes from halophiles for further application in bioenergy production.
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Affiliation(s)
- Hui-Ying Yu
- Life Science College, Yuncheng University, 1155 Fudan West Street, Yuncheng, 044000, Shanxi, China
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16
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Galanakis CM, Patsioura A, Gekas V. Enzyme Kinetics Modeling as a Tool to Optimize Food Industry: A Pragmatic Approach Based on Amylolytic Enzymes. Crit Rev Food Sci Nutr 2014; 55:1758-70. [DOI: 10.1080/10408398.2012.725112] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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Liu D, Zhang H, Xu B, Tan J. Development of Kinetic Model Structures for Glutinous Rice Saccharification by Different Enzymes. J FOOD PROCESS ENG 2014. [DOI: 10.1111/jfpe.12088] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Dengfeng Liu
- Key Laboratory of Industrial Advanced Process Control for Light Industry of Ministry of Education; Jiangnan University; Wuxi 214122 China
- Department of Bioengineering; University of Missouri; Columbia MO 65211
| | - Hongtao Zhang
- Key Laboratory of Industrial Biotechnology of Ministry of Education; Jiangnan University; Wuxi 214122 China
| | - Baoguo Xu
- Key Laboratory of Industrial Advanced Process Control for Light Industry of Ministry of Education; Jiangnan University; Wuxi 214122 China
| | - Jinglu Tan
- Department of Bioengineering; University of Missouri; Columbia MO 65211
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18
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Lyubenova V, Ochoa S, Repke J, Ignatova M, Wozny G. Control of one Stage Bio Ethanol Production by Recombinant Strain. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.1080/13102818.2007.10817476] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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19
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Saeed A, Iqbal M. Loofa (Luffa cylindrica) sponge: Review of development of the biomatrix as a tool for biotechnological applications. Biotechnol Prog 2013; 29:573-600. [DOI: 10.1002/btpr.1702] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 11/11/2012] [Indexed: 11/09/2022]
Affiliation(s)
- Asma Saeed
- Environmental Biotechnology Group; Biotechnology and Food Research Centre; Lahore 54600 Pakistan
| | - Muhammad Iqbal
- Environmental Biotechnology Group; Biotechnology and Food Research Centre; Lahore 54600 Pakistan
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20
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Awg-Adeni DS, Bujang KB, Hassan MA, Abd-Aziz S. Recovery of glucose from residual starch of sago hampas for bioethanol production. BIOMED RESEARCH INTERNATIONAL 2012; 2013:935852. [PMID: 23509813 PMCID: PMC3591117 DOI: 10.1155/2013/935852] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/10/2012] [Revised: 11/11/2012] [Accepted: 11/12/2012] [Indexed: 11/17/2022]
Abstract
Lower concentration of glucose was often obtained from enzymatic hydrolysis process of agricultural residue due to complexity of the biomass structure and properties. High substrate load feed into the hydrolysis system might solve this problem but has several other drawbacks such as low rate of reaction. In the present study, we have attempted to enhance glucose recovery from agricultural waste, namely, "sago hampas," through three cycles of enzymatic hydrolysis process. The substrate load at 7% (w/v) was seen to be suitable for the hydrolysis process with respect to the gelatinization reaction as well as sufficient mixture of the suspension for saccharification process. However, this study was focused on hydrolyzing starch of sago hampas, and thus to enhance concentration of glucose from 7% substrate load would be impossible. Thus, an alternative method termed as cycles I, II, and III which involved reusing the hydrolysate for subsequent enzymatic hydrolysis process was introduced. Greater improvement of glucose concentration (138.45 g/L) and better conversion yield (52.72%) were achieved with the completion of three cycles of hydrolysis. In comparison, cycle I and cycle II had glucose concentration of 27.79 g/L and 73.00 g/L, respectively. The glucose obtained was subsequently tested as substrate for bioethanol production using commercial baker's yeast. The fermentation process produced 40.30 g/L of ethanol after 16 h, which was equivalent to 93.29% of theoretical yield based on total glucose existing in fermentation media.
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Affiliation(s)
- D. S. Awg-Adeni
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Malaysia
- Department of Molecular Biology, Faculty of Resource Sciences and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Malaysia
| | - K. B. Bujang
- Department of Molecular Biology, Faculty of Resource Sciences and Technology, Universiti Malaysia Sarawak, 94300 Kota Samarahan, Malaysia
| | - M. A. Hassan
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Malaysia
| | - S. Abd-Aziz
- Department of Bioprocess Technology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, 43400 Serdang, Malaysia
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RAMAN DRAJ, ANEX ROBERTP. CONCEPTUAL AND MATHEMATICAL MODELS OF BATCH SIMULTANEOUS SACCHARIFICATION AND FERMENTATION: DIMENSIONLESS GROUPS FOR PREDICTING PROCESS DYNAMICS. J BIOL SYST 2012. [DOI: 10.1142/s0218339012500064] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This paper describes a modeling effort demonstrating that dimensionless groupings of classical process parameters can be used to predicting process dynamics of batch simultaneous saccharification and fermentation (SSF) processes. Michaelis–Menten enzyme kinetics and Monod growth kinetics were employed, and inhibition of enzyme action and inhibition of microbial growth were neglected. The SSF process was characterized by the relative durations of three phases: A microbially-limited phase, a hydrolysis-limited phase, and a monosaccharide-depletion phase. The duration of these three phases were interrelated, and well predicted by the dimensionless magnitude of the monosaccharide peak (MSP). Thus, the MSP could be used as a single-value descriptor of an SSF process. The dimensionless ratio of the initial hydrolysis rate to the initial substrate consumption rate was shown to predict MSP, and an overall system time constant was shown to predict the total run time of a batch SSF process.
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Affiliation(s)
- D. RAJ RAMAN
- Department of Agricultural and Biosystems Engineering, Iowa State University, 3222 NSRIC Building, Ames, IA 50011, USA
| | - ROBERT P. ANEX
- Department of Agricultural and Biosystems Engineering, Iowa State University, 3222 NSRIC Building, Ames, IA 50011, USA
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Mangat M, Kalra KL, Kocher GS, Phutela R, Sharma S. Comparative ethanol production for two corn varieties by commercial enzymes. STARCH-STARKE 2010. [DOI: 10.1002/star.200900253] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Silva RDN, Quintino FP, Monteiro VN, Asquieri ER. Production of glucose and fructose syrups from cassava (Manihot esculenta Crantz) starch using enzymes produced by microorganisms isolated from Brazilian Cerrado soil. FOOD SCIENCE AND TECHNOLOGY 2010. [DOI: 10.1590/s0101-20612010005000011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The high demands for sugars and the development of enzymatic technology have increased the production of sweeteners, especially for glucose and fructose syrups. This work describe a technology for glucose and fructose syrups from Brazilian cassava starch using enzymes produced by soil microrganisms isolated from the Brazilian Cerrado soil. Firstly, Aspergillus niger and Streptomyces sp. were isolated from the soil and used as glucoamylase (GA) and glucose isomerase (GI) producer sources. After characterization, GA and GI exhibited optimum pH 4.5 and 8.0, respectively. GA showed maximum activity at 60 ºC and GI at 85 ºC. GA and GI retained 65 and 80%, respectively, of initial activity after 180 minutes of incubation at 60 ºC. The kinetic parameters Km and Vmáx were 0.476 (mg.mL-1) and 8.58 (µmol/minute) for GA and 0.082 (M) and 48.20 (µmol/minute) for GI. The maximum glucose syrups production occurred after 24 hours of reaction with a 98% yield. The production of fructose syrups with 42% (w/v) was reached after 96 hours of reaction.
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Kumar P, Satyanarayana T. Microbial glucoamylases: characteristics and applications. Crit Rev Biotechnol 2009; 29:225-55. [DOI: 10.1080/07388550903136076] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Characterization of a Neutral and Thermostable Glucoamylase from the Thermophilic Mold Thermomucor indicae-seudaticae: Activity, Stability, and Structural Correlation. Appl Biochem Biotechnol 2009; 160:879-90. [DOI: 10.1007/s12010-009-8666-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2008] [Accepted: 05/04/2009] [Indexed: 11/26/2022]
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Sun HY, Wang L, Liu JW, Peng M. Improved Production of Raw Starch Degrading Enzyme by Aspergillus oryzae F-30 Using Methyl Glucoside Sesqui-Stearate. Appl Biochem Biotechnol 2008; 159:78-84. [DOI: 10.1007/s12010-008-8413-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2008] [Accepted: 10/24/2008] [Indexed: 11/24/2022]
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Kumar P, Satyanarayana T. Overproduction of glucoamylase by a deregulated mutant of a thermophilic mould Thermomucor indicae-seudaticae. Appl Biochem Biotechnol 2008; 158:113-25. [PMID: 18769880 DOI: 10.1007/s12010-008-8342-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2008] [Accepted: 08/06/2008] [Indexed: 11/29/2022]
Abstract
Thermomucor indicae-seudaticae, a glucoamylase-producing thermophilic mould, was mutagenised using nitrous acid and gamma ((60)Co) irradiation in a sequential manner to isolate deregulated mutants for enhanced production of glucoamylase. The mutants were isolated on Emerson YpSs agar containing a non-metabolisable glucose analogue 2-deoxy-D-glucose (2-DG) for selection. The preliminary screening for glucoamylase production using starch-iodine plate assay followed by quantitative confirmation in submerged fermentation permitted the isolation of several variants showing varying levels of derepression and glucoamylase secretion. The mutant strain T. indicae-seudaticae CR19 was able to grow in the presence of 0.5 g l(-1) 2-DG and produced 1.8-fold higher glucoamylase. As with the parent strain, glucoamylase production by T. indicae-seudaticae CR19 in 250-ml Erlenmeyer flasks attained a peak in 48 h of fermentation, showing higher glucoamylase productivity (0.67 U ml(-1) h(-1)) than the former (0.375 U ml(-1) h(-1)). A large-scale cultivation in 5-l laboratory bioreactor confirmed similar fermentation profiles, though the glucoamylase production peak was attained within 36 h attributable to the better control of process parameters. Although the mutant grew slightly slow in the presence of 2-DG and exhibited less sporulation, it showed faster growth on normal Emerson medium with a higher specific growth rate (0.138 h(-1)) compared to the parent strain (0.123 h(-1)). The glucoamylase produced by both strains was optimally active at 60 degrees C and pH 7.0 and displayed broad substrate specificity by cleaving alpha-1,4- and alpha-1,6-glycosidic linkages in starch, amylopectin, amylose and pullulan. Improved productivity and higher specific growth rate make T. indicae-seudaticae CR19 a useful strain for glucoamylase production.
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Affiliation(s)
- Pardeep Kumar
- Department of Microbiology, University of Delhi South Campus, New Delhi, India
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Application of maltitol to improve production of raw starch digesting glucoamylase by Aspergillus niger F-08. World J Microbiol Biotechnol 2008. [DOI: 10.1007/s11274-008-9785-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Morales S, Álvarez H, Sánchez C. Dynamic models for the production of glucose syrups from cassava starch. FOOD AND BIOPRODUCTS PROCESSING 2008. [DOI: 10.1016/j.fbp.2007.10.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kumar P, Satyanarayana T. Economical glucoamylase production by alginate-immobilized Thermomucor indicae-seudaticae in cane molasses medium. Lett Appl Microbiol 2007; 45:392-7. [PMID: 17897381 DOI: 10.1111/j.1472-765x.2007.02201.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS The present investigation is aimed at assessing the suitability of cane molasses as a cheaper carbon and energy source for glucoamylase production using alginate-immobilized Thermomucor indicae-seudaticae. METHODS AND RESULTS The culture variables for glucoamylase production were optimized by 'one-variable-at-a-time' strategy and response surface methodology (RSM). A high glucoamylase titre was attained when 40 alginate beads (c. 5x10(6) immobilized spores) were used to inoculate 50 ml of cane molasses (8%) medium in 250-ml Erlenmeyer flasks. Response surface optimization of fermentation parameters (cane molasses 7%, inoculum level 44 alginate beads per 50 ml of medium and ammonium nitrate 0.25%) resulted in 1.8-fold higher glucoamylase production (27 U ml(-1)) than that in the unoptimized medium (15 U ml(-1)). Enzyme production was also sustainable in 22 l of laboratory air-lift bioreactor. CONCLUSIONS Cane molasses served as an excellent carbon and energy source for the economical production of glucoamylase, which was almost comparable with that in sucrose yeast-extract broth. The statistical model developed using RSM allowed determination of optimum levels of the variables for improving glucoamylase production. SIGNIFICANCE AND IMPACT OF THE STUDY The cost of glucoamylase produced in cane molasses supplemented with ammonium nitrate was considerably lower (euro1.43 per million U) than in synthetic medium containing sucrose and yeast-extract (euro35.66 per million U). The reduction in fermentation time in air-lift bioreactor with sustainable glucoamylase titres suggested the feasibility of scale up of the process.
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Affiliation(s)
- P Kumar
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi, India
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Bryjak J, Aniulyte J, Liesiene J. Evaluation of man-tailored cellulose-based carriers in glucoamylase immobilization. Carbohydr Res 2007; 342:1105-9. [PMID: 17359947 DOI: 10.1016/j.carres.2007.02.014] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2006] [Revised: 01/23/2007] [Accepted: 02/12/2007] [Indexed: 11/29/2022]
Abstract
Covalent immobilization of glucoamylase on the cellulose-based carrier Granocel was optimized by changing the anchor groups and the methods of activation/immobilization. Binding of the enzyme was via its primary amino groups. It was shown that using carbodiimide and divinyl sulfone for the activation of -COOH and -OH groups on the carrier resulted in the preparations with very low activity. A third method, using pentaethylenehexamine with glutaraldehyde, led to the attachment through a long spacer arm and to the preparations with the highest activity. Further optimization of the carrier's structure consisted of changing pore diameters and amount of functional groups on the carrier surface. The highest activity of bound glucoamylase was obtained by linking the protein via glutaraldehyde on NH(2)-Granocel having high pore size and high number of functional groups. The immobilized enzyme was stable throughout extended storage and possessed higher thermal stability.
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Affiliation(s)
- Jolanta Bryjak
- Faculty of Chemistry, Wrocław University of Technology, Wybrzeze Wyspiańskiego 27, 50-373 Wrocław, Poland.
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Kumar P, Satyanarayana T. Optimization of culture variables for improving glucoamylase production by alginate-entrapped Thermomucor indicae-seudaticae using statistical methods. BIORESOURCE TECHNOLOGY 2007; 98:1252-9. [PMID: 16806908 DOI: 10.1016/j.biortech.2006.05.019] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2006] [Revised: 05/02/2006] [Accepted: 05/06/2006] [Indexed: 05/10/2023]
Abstract
Alginate-entrapped sporangiospores of Thermomucor indicae-seudaticae were used for the production of glucoamylase. The critical variables that affected glucoamylase production were identified by Plackett-Burman design (sucrose, yeast-extract, K(2)HPO(4) and asparagine) and further optimized by using a four factor central composite design (CCD) of response surface methodology (RSM). Immobilized sporangiospores secreted 41% and 60% higher glucoamylase titers in shake flasks and airlift fermenter, respectively, when the variables were used at their optimum levels (sucrose 3.0%, yeast-extract 0.2%, K(2)HPO(4) 0.1% and asparagine 0.35%). Glucoamylase production (26.3 U ml(-1)) in the optimized medium was in good agreement with the values predicted by the quadratic model (26.7 U ml(-1)), thereby confirming its validity. The enzyme production was sustainable in flasks of higher volume and also airlift fermenter, and attained a peak within 32 h in the fermenter as compared to that of 48 h in shake flasks.
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Affiliation(s)
- Pardeep Kumar
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi 110021, India
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Baş D, Dudak FC, Boyacı İH. Modeling and optimization III: Reaction rate estimation using artificial neural network (ANN) without a kinetic model. J FOOD ENG 2007. [DOI: 10.1016/j.jfoodeng.2006.02.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Kumar P, Satyanarayana T. Production of thermostable and neutral glucoamylase using immobilized Thermomucor indicae-seudaticae. World J Microbiol Biotechnol 2006. [DOI: 10.1007/s11274-006-9253-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Kroumov AD, Módenes AN, Tait MCDA. Development of new unstructured model for simultaneous saccharification and fermentation of starch to ethanol by recombinant strain. Biochem Eng J 2006. [DOI: 10.1016/j.bej.2005.11.008] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Devantier R, Scheithauer B, Villas-Bôas SG, Pedersen S, Olsson L. Metabolite profiling for analysis of yeast stress response during very high gravity ethanol fermentations. Biotechnol Bioeng 2005; 90:703-14. [PMID: 15812801 DOI: 10.1002/bit.20457] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
A laboratory strain and an industrial strain of Saccharomyces cerevisiae were grown at high substrate concentration, so-called very high gravity (VHG) fermentation. Simultaneous saccharification and fermentation (SSF) was applied in a batch process using 280 g/L maltodextrin as carbon source. It was shown that known ethanol and osmotic stress responses such as decreased growth rate, lower viability, higher energy consumption, and intracellular trehalose accumulation occur in VHG SSF for both strains when compared with standard laboratory medium (20 g/L glucose). The laboratory strain was the most affected. GC-MS metabolite profiling was applied for assessing the yeast stress response influence on cellular metabolism. It was found that metabolite profiles originating from different strains and/or fermentation conditions were unique and could be distinguished with the help of multivariate data analysis. Several differences in the metabolic responses to stressing conditions were revealed, particularly the increased energy consumption of stressed cells was also reflected in increased intracellular concentrations of pyruvate and related metabolites.
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Affiliation(s)
- Rasmus Devantier
- Starch, Applied Discovery, Research & Development, Novozymes A/S, Laurentsvej 51-53, DK-2880 Bagsvaerd, Denmark
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