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Co-culture of Zymomonas mobilis and Scheffersomyces stipitis immobilized in polymeric membranes for fermentation of glucose and xylose to ethanol. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2019.02.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Stripping of ethanol with CO2 in bubble columns: Effects of operating conditions and modeling. Chem Eng Res Des 2015. [DOI: 10.1016/j.cherd.2015.06.022] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Pérez-Bibbins B, Torrado-Agrasar A, Salgado JM, Mussatto SI, Domínguez JM. Xylitol production in immobilized cultures: a recent review. Crit Rev Biotechnol 2015; 36:691-704. [DOI: 10.3109/07388551.2015.1004660] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Belinda Pérez-Bibbins
- Faculty of Sciences, Department of Chemical Engineering, University of Vigo (Campus Ourense), Ourense, Spain,
- Laboratory of Agro-food Biotechnology, CITI (University of Vigo)-Tecnópole, Technological Park of Galicia, San Cibrao das Viñas, Ourense, Spain,
| | - Ana Torrado-Agrasar
- Bromatology Group, Faculty of Sciences, Department of Analytical and Food Chemistry, University of Vigo (Campus Ourense), Ourense, Spain, and
| | - José Manuel Salgado
- Faculty of Sciences, Department of Chemical Engineering, University of Vigo (Campus Ourense), Ourense, Spain,
- Laboratory of Agro-food Biotechnology, CITI (University of Vigo)-Tecnópole, Technological Park of Galicia, San Cibrao das Viñas, Ourense, Spain,
| | - Solange I. Mussatto
- Department of Biotechnology, Delft University of Technology, Delft, The Netherlands
| | - José Manuel Domínguez
- Faculty of Sciences, Department of Chemical Engineering, University of Vigo (Campus Ourense), Ourense, Spain,
- Laboratory of Agro-food Biotechnology, CITI (University of Vigo)-Tecnópole, Technological Park of Galicia, San Cibrao das Viñas, Ourense, Spain,
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Fan S, Xiao Z, Zhang Y, Tang X, Chen C, Li W, Deng Q, Yao P. Enhanced ethanol fermentation in a pervaporation membrane bioreactor with the convenient permeate vapor recovery. BIORESOURCE TECHNOLOGY 2014; 155:229-234. [PMID: 24457307 DOI: 10.1016/j.biortech.2013.12.114] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2013] [Revised: 12/25/2013] [Accepted: 12/27/2013] [Indexed: 06/03/2023]
Abstract
A continuous and closed-circulating fermentation (CCCF) system with a pervaporation membrane bioreactor was built for ethanol fermentation without a refrigeration unit to condense the permeate vapor. Two runs of experiment with a feature of complete and continuous coupling of fermentation and pervaporation were carried out, lasting for 192h and 264h, respectively. The experimental measurement indicated that the enhanced fermentation could be achieved with additional advantages of convenient permeate recovery and energy saving of the process. During the second experiment, the average cell concentration, glucose consumption rate, ethanol productivity, ethanol yield and total ethanol amount produced reached 19.8gL(-1), 6.06gL(-1)h(-1), 2.31gL(-1)h(-1), 0.38, and 609.8gL(-1), respectively. During the continuous fermentation process, ethanol removal in situ promoted the cell second growth obviously, but the accumulation of the secondary metabolites in the broth became the main inhibitor against the cell growth and fermentation.
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Affiliation(s)
- Senqing Fan
- School of Chemical Engineering, Sichuan University, 610065 Chengdu, China
| | - Zeyi Xiao
- School of Chemical Engineering, Sichuan University, 610065 Chengdu, China.
| | - Yan Zhang
- School of Chemical Engineering, Sichuan University, 610065 Chengdu, China
| | - Xiaoyu Tang
- Biogas Institute of Ministry of Agriculture, 610041 Chengdu, China
| | - Chunyan Chen
- College of Chemistry and Chemical Engineering, Southwest Petroleum University, 610500 Chengdu, China
| | - Weijia Li
- School of Chemical Engineering, Sichuan University, 610065 Chengdu, China
| | - Qing Deng
- School of Chemical Engineering, Sichuan University, 610065 Chengdu, China
| | - Peina Yao
- School of Chemical Engineering, Sichuan University, 610065 Chengdu, China
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Pérez-Bibbins B, de Souza Oliveira RP, Torrado A, Aguilar-Uscanga MG, Domínguez JM. Study of the potential of the air lift bioreactor for xylitol production in fed-batch cultures by Debaryomyces hansenii immobilized in alginate beads. Appl Microbiol Biotechnol 2013; 98:151-61. [PMID: 24136467 DOI: 10.1007/s00253-013-5280-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 09/17/2013] [Accepted: 09/18/2013] [Indexed: 10/26/2022]
Abstract
Cell immobilization has shown to be especially adequate for xylitol production. This work studies the suitability of the air lift bioreactor for xylitol production by Debaryomyces hansenii immobilized in Ca-alginate operating in fed-batch cultures to avoid substrate inhibition. The results showed that the air lift bioreactor is an adequate system since the minimum air flow required for fluidization was even lower than that leading to the microaerobic conditions that trigger xylitol accumulation by this yeast, also maintaining the integrity of the alginate beads and the viability of the immobilized cells until 3 months of reuses. Maximum productivities and yields of 0.43 g/l/h and 0.71 g/g were achieved with a xylose concentration of 60 g/l after each feeding. The xylose feeding rate, the air flow, and the biomass concentration at the beginning of the fed-batch operation have shown to be critical parameters for achieving high productivities and yields. Although a maximum xylitol production of 139 g/l was obtained, product inhibition was evidenced in batch experiments, which allowed estimating at 200 and 275 g/l the IC50 for xylitol productivity and yield, respectively. The remarkable production of glycerol in the absence of glucose was noticeable, which could not only be attributed to the osmoregulatory function of this polyol in conditions of high osmotic pressure caused by high xylitol concentrations but also to the role of the glycerol synthesis pathway in the regeneration of NAD(+) in conditions of suboptimal microaeration caused by insufficient aeration or high oxygen demand when high biomass concentrations were achieved.
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Affiliation(s)
- Belinda Pérez-Bibbins
- Laboratory of Agro-Food Biotechnology, CITI (University of Vigo)-Tecnópole, Parque Tecnológico de Galicia, San Cibrao das Viñas, Ourense, Spain
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Lazarova M, Bösch P, Friedl A. POMS Membrane for Selective Separation of Ethanol from Dilute Alcohol-Aqueous Solutions by Pervaporation. SEP SCI TECHNOL 2012. [DOI: 10.1080/01496395.2012.658943] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Banerjee S, Mudliar S, Sen R, Giri B, Satpute D, Chakrabarti T, Pandey R. Commercializing lignocellulosic bioethanol: technology bottlenecks and possible remedies. BIOFUELS, BIOPRODUCTS AND BIOREFINING 2010; 4:77-93. [PMID: 0 DOI: 10.1002/bbb.188] [Citation(s) in RCA: 91] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
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Sampaio FC, de Faria JT, Coimbra JSR, Lopes Passos FM, Converti A, Minin LA. Xylose reductase activity in Debaryomyces hansenii UFV-170 cultivated in semi-synthetic medium and cotton husk hemicellulose hydrolyzate. Bioprocess Biosyst Eng 2009; 32:747-54. [PMID: 19184115 DOI: 10.1007/s00449-009-0299-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2008] [Accepted: 01/09/2009] [Indexed: 11/29/2022]
Abstract
To develop a new enzymatic xylose-to-xylitol conversion, deeper knowledge on the regulation of xylose reductase (XR) is needed. To this purpose, a new strain of Debaryomyces hansenii (UFV-170), which proved a promising xylitol producer, was cultivated in semi-synthetic media containing different carbon sources, specifically three aldo-hexoses (D-glucose, D-galactose and D-mannose), a keto-hexose (D-fructose), a keto-pentose (D-xylose), three aldo-pentoses (D-arabinose, L-arabinose and D-ribose), three disaccharides (maltose, lactose and sucrose) and a pentitol (xylitol). The best substrate was lactose on which cell concentration reached about 20 g l(-1) dry weight (DW), while the highest specific growth rates (0.58-0.61 h(-1)) were detected on lactose, D-mannose, D-glucose and D-galactose. The highest specific activity of XR (0.24 U mg(-1)) was obtained in raw extracts of cells grown on D-xylose and harvested in the stationary growth phase. When grown on cotton husk hemicellulose hydrolyzates, cells exhibited XR activities five to seven times higher than on semi-synthetic media.
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Affiliation(s)
- Fábio Coelho Sampaio
- Food Technology Department, Federal University of Viçosa, Viçosa, Minas Gerais 36571-000, Brazil
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Moya AJ, Bravo V, Mateo S, Sánchez S. Fermentation of acid hydrolysates from olive-tree pruning debris by Pachysolen tannophilus. Bioprocess Biosyst Eng 2008; 31:611-7. [PMID: 18347818 DOI: 10.1007/s00449-008-0211-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Accepted: 02/13/2008] [Indexed: 12/01/2022]
Abstract
The influence of the type and concentration of acid in the hydrolysis process and its effect on the subsequent fermentation by Pachysolen tannophilus (ATCC 32691) to produce ethanol and xylitol was studied. The hydrolysis experiments were performed using hydrochloric, sulphuric and trifluoroacetic acids in concentrations ranging from 0.1 to 1.0 N, a temperature of 90 degrees C, and a time of 240 min. The fermentation experiments were conducted on a laboratory scale in a batch-culture reactor at pH 4.5 and 30 degrees C. The hydrolysis with the highest acid concentration produced the complete solubilization of hemicellulose to monosaccharides. The highest values for the specific rate of ethanol production were registered in cultures hydrolyzed with trifluoroacetic acid, and values were found to decrease as the acid concentration increased. The highest values of overall ethanol yields (Y(E/s)G = 0.37 kg kg(-1)) were also found in the fermentation of the hydrolysates of trifluoroacetic acid.
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Affiliation(s)
- Alberto J Moya
- Department of Chemical, Environmental and Materials Engineering, University of Jaén, Jaen, Spain
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Govindaswamy S, Vane LM. Kinetics of growth and ethanol production on different carbon substrates using genetically engineered xylose-fermenting yeast. BIORESOURCE TECHNOLOGY 2007; 98:677-85. [PMID: 16563746 DOI: 10.1016/j.biortech.2006.02.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2004] [Revised: 01/05/2006] [Accepted: 02/01/2006] [Indexed: 05/08/2023]
Abstract
Saccharomyces cerevisiae 424A (LNH-ST) strain was used for fermentation of glucose and xylose. Growth kinetics and ethanol productivity were calculated for batch fermentation on media containing different combinations of glucose and xylose to give a final sugar concentration of 20+/-0.8 g/L. Growth rates obtained in pure xylose-based medium were less than those for media containing pure glucose and glucose-xylose mixtures. A maximum specific growth rate micro(max) of 0.291 h(-1) was obtained in YPD medium containing 20 g/L glucose as compared to 0.206 h(-1) in YPX medium containing 20 g/L xylose. In media containing combinations of glucose and xylose, glucose was exhausted first followed by xylose. Ethanol production on pure xylose entered log phase during the 12-24h period as compared to the 4-10h for pure glucose based medium using 2% inoculum. When glucose was added to fermentation flasks which had been initiated on a pure xylose-based medium, the rate of xylose usage was reduced indicating cosubstrate inhibition of xylose consumption by glucose.
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Affiliation(s)
- Shekar Govindaswamy
- National Risk Management Research Laboratory, US Environmental Protection Agency (MS 443), 26 W. Martin Luther King Dr., Cincinnati, OH 45268, USA
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Efficiency of a fixed-bed and a gas-lift three-column reactor for continuous production of ethanol by pectate-and alginate-immobilized Saccharomyces cerevisiae cells. CHEMICAL PAPERS 2006. [DOI: 10.2478/s11696-006-0028-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AbstractEthanol-tolerant and thermo-tolerant yeast strain Saccharomyces cerevisiae C11-3 cells immobilized in calcium pectate and calcium alginate gels were used for ethanol fermentation in a three-reactor system with a gradient temperature control. The fermentation process has been tested in a fixed-bed and a gas-lift arrangement. The gas-lift system was more efficient due to a better mass transport between the phases. Abrasion was more evident in calcium alginate particles, while calcium pectate beads were not significantly damaged. Two different concentrations of alginate were tested and calcium pectate gel was demonstrated to be more suitable as an immobilization material in comparison with calcium alginate due to its mechanical resistance and favourable diffusion parameters, providing an ethanol production of more than 7.5 g dm−3 h−1 over a period of 630 h.
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Löser C, Schröder A, Deponte S, Bley T. Balancing the Ethanol Formation in Continuous Bioreactors with Ethanol Stripping. Eng Life Sci 2005. [DOI: 10.1002/elsc.200520084] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Stark D, von Stockar U. In situ product removal (ISPR) in whole cell biotechnology during the last twenty years. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2003; 80:149-75. [PMID: 12747544 DOI: 10.1007/3-540-36782-9_5] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
This review sums up the activity in the field of in situ product removal in whole cell bioprocesses over the last 20 years. It gives a complete summary of ISPR operations with microbial cells and cites a series of interesting ISPR applications in plant and animal cell technology. All the ISPR projects with microbial cells are categorized according to their products, their ISPR techniques, and their applied configurations of the ISPR set-up. Research on ISPR application has primarily increased in the field of microbial production of aromas and organic acids such lactic acid over the last ten years. Apart from the field of de novo formation of bioproducts, ISPR is increasingly applied to microbial bioconversion processes. However, despite of the large number of microbial whole cell ISPR projects (approximately 250), very few processes have been transferred to an industrial scale. The proposed processes have mostly been too complex and consequently not cost effective. Therefore, this review emphasizes that the planning of a successful whole cell ISPR process should not only consider the choice of ISPR technique according to the physicochemical properties of the product, but also the potential configuration of the whole process set-up. Furthermore, additional process aspects, biological and legal constraint need to be considered from the very beginning for the design of an ISPR project. Finally, future trends of new, modified or improved ISPR techniques are given.
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Affiliation(s)
- Daniel Stark
- Laboratory of Chemical and Biochemical Engineering, Swiss Federal Institute of Technology (EPFL), 1015 Lausanne, Switzerland
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