1
|
Mohamed M, Awad HM, Mostafa ESE. Purification, catalytic, kinetic, thermodynamic characterization and stability profile of alkalophilic lipase from Streptomyces sp. SBLWN_MH2. Biocatalysis and Agricultural Biotechnology 2021. [DOI: 10.1016/j.bcab.2021.102156] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
2
|
Mohammadi M, Najavand S, Pazhang M. Immobilization of endoglucanase Cel9A on chitosan nanoparticles leads to its stabilization against organic solvents: the use of polyols to improve the stability. 3 Biotech 2019; 9:269. [PMID: 31218180 DOI: 10.1007/s13205-019-1794-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Accepted: 06/03/2019] [Indexed: 12/21/2022] Open
Abstract
The immobilization of enzymes improves their stability in non-conventional media such as organic solvents. In this work, the effects of solvents (DMSO, methanol, ethanol, and n-propanol) on the endoglucanase Cel9A activity and stability were studied. Then, the enzymes were stabilized by its immobilization on chitosan nanoparticles and also using polyols (sorbitol and glycerol) against organic solvents. The SEM results illustrated that the chitosan nanoparticles had about 40 nm diameter. The results indicated that the organic solvents, especially n-propanol, decreased the activity of the free and immobilized enzymes. The reduced activity of the immobilized enzyme was less than that of the free enzyme. Our studies about the enzymes' stability showed that the free and immobilized enzymes in hydrophobic solvents (with high log P) had the lowest stability compared to other solvents as we observed the half-life of the free enzyme in n-propanol solvent was 2.84 min, and the half-life of the immobilized enzyme was 4.98 min in n-propanol and ethanol solvents 4.50 min. Analysis of the combinatory effects of polyols (sorbitol and glycerol) and the solvents on the stability revealed that sorbitol and glycerol had the most stabilizing effect on the free enzyme in hydrophilic (DMSO) and hydrophobic (n-propanol) solvents, respectively. However, the stabilizing effects of polyols in the immobilized enzyme were independent of the solvents' hydrophobicity (or log P) due to the hydrophilic properties of chitosan nanoparticles. Therefore, one can conclude that the physiochemical properties of nanoparticles (such as hydrophilicity) influence the stabilizing effects of polyols on immobilized enzyme.
Collapse
|
3
|
Sungkeeree P, Whangsuk W, Sallabhan R, Dubbs J, Mongkolsuk S, Loprasert S. Efficient removal of toxic phthalate by immobilized serine-type aldehyde-tagged esterase G. Process Biochem 2017. [DOI: 10.1016/j.procbio.2017.09.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
4
|
Adak S, Banerjee R. A green approach for starch modification: Esterification by lipase and novel imidazolium surfactant. Carbohydr Polym 2016; 150:359-68. [DOI: 10.1016/j.carbpol.2016.05.038] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 05/09/2016] [Accepted: 05/12/2016] [Indexed: 11/15/2022]
|
5
|
Ćorović M, Mihailović M, Banjanac K, Carević M, Milivojević A, Milosavić N, Bezbradica D. Immobilization of Candida antarctica lipase B onto Purolite® MN102 and its application in solvent-free and organic media esterification. Bioprocess Biosyst Eng 2017; 40:23-34. [DOI: 10.1007/s00449-016-1671-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 08/10/2016] [Indexed: 10/21/2022]
|
6
|
Jian H, Wang Y, Bai Y, Li R, Gao R. Site-Specific, Covalent Immobilization of Dehalogenase ST2570 Catalyzed by Formylglycine-Generating Enzymes and Its Application in Batch and Semi-Continuous Flow Reactors. Molecules 2016; 21:E895. [PMID: 27409601 DOI: 10.3390/molecules21070895] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Revised: 07/03/2016] [Accepted: 07/05/2016] [Indexed: 01/05/2023] Open
Abstract
Formylglycine-generating enzymes can selectively recognize and oxidize cysteine residues within the sulfatase sub motif at the terminus of proteins to form aldehyde-bearing formylglycine (FGly) residues, and are normally used in protein labeling. In this study, an aldehyde tag was introduced to proteins using formylglycine-generating enzymes encoded by a reconstructed set of the pET28a plasmid system for enzyme immobilization. The haloacid dehalogenase ST2570 from Sulfolobus tokodaii was used as a model enzyme. The C-terminal aldehyde-tagged ST2570 (ST2570CQ) exhibited significant enzymological properties, such as new free aldehyde groups, a high level of protein expression and improved enzyme activity. SBA-15 has widely been used as an immobilization support for its large surface and excellent thermal and chemical stability. It was functionalized with amino groups by aminopropyltriethoxysilane. The C-terminal aldehyde-tagged ST2570 was immobilized to SBA-15 by covalent binding. The site-specific immobilization of ST2570 avoided the chemical denaturation that occurs in general covalent immobilization and resulted in better fastening compared to physical adsorption. The site-specific immobilized ST2570 showed 3-fold higher thermal stability, 1.2-fold higher catalytic ability and improved operational stability than free ST2570. The site-specific immobilized ST2570 retained 60% of its original activity after seven cycles of batch operation, and it was superior to the ST2570 immobilized to SBA-15 by physical adsorption, which loses 40% of its original activity when used for the second time. It is remarkable that the site-specific immobilized ST2570 still retained 100% of its original activity after 10 cycles of reuse in the semi-continuous flow reactor. Overall, these results provide support for the industrial-scale production and application of site-specific, covalently immobilized ST2570.
Collapse
|
7
|
Adak S, Datta S, Bhattacharya S, Banerjee R. Role of spacer length in interaction between novel gemini imidazolium surfactants and Rhizopus oryzae lipase. Int J Biol Macromol 2015; 81:560-7. [DOI: 10.1016/j.ijbiomac.2015.08.051] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2015] [Revised: 08/06/2015] [Accepted: 08/23/2015] [Indexed: 11/30/2022]
|
8
|
Adak S, Datta S, Bhattacharya S, Banerjee R. Imidazolium based ionic liquid type surfactant improves activity and thermal stability of lipase of Rhizopus oryzae. ACTA ACUST UNITED AC 2015; 119:12-7. [DOI: 10.1016/j.molcatb.2015.05.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
9
|
Todero LM, Bassi JJ, Lage FA, Corradini MC, Barboza JC, Hirata DB, Mendes AA. Enzymatic synthesis of isoamyl butyrate catalyzed by immobilized lipase on poly-methacrylate particles: optimization, reusability and mass transfer studies. Bioprocess Biosyst Eng 2015; 38:1601-13. [PMID: 25935327 DOI: 10.1007/s00449-015-1402-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 04/14/2015] [Indexed: 02/05/2023]
Abstract
Isoamyl butyrate (banana flavor) was synthesized by esterification reaction of isoamyl alcohol and butyric acid in heptane medium. Immobilized Thermomyces lanuginosus lipase (TLL) prepared via physical adsorption on mesoporous poly-methacrylate particles (PMA) was used as biocatalyst. The factors that affect the esterification reaction were optimized by response surface methodology (RSM). Under optimal experimental conditions, maximum ester conversion percentage of 96.1 and 73.6% was reached after 50 and 90 min, respectively, for esterification reaction performed at equimolar ratio alcohol:acid at 500 and 2000 mM of each substrate. Under these experimental conditions, the esterification reaction was not controlled by external and intra-particle mass transfer effects. The product (isoamyl butyrate) was confirmed by proton nuclear magnetic resonance ((1)H NMR) spectroscopy. Reusability tests showed that the biocatalyst retained around 96 and 31% of its initial activity after eight successive esterification cycles performed at 500 and 2000 mM, respectively. The application of the biocatalyst prepared showed to be a promising strategy to catalyze flavor ester synthesis in a non-aqueous medium.
Collapse
|
10
|
Kühbeck D, Mayr J, Häring M, Hofmann M, Quignard F, Díaz Díaz D. Evaluation of the nitroaldol reaction in the presence of metal ion-crosslinked alginates. NEW J CHEM 2015. [DOI: 10.1039/c4nj02178a] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Calcium alginate hydrogel beads have been found to promote the Henry reaction under mild conditions.
Collapse
Affiliation(s)
- Dennis Kühbeck
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
| | - Judith Mayr
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
| | - Marleen Häring
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
| | - Martin Hofmann
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
| | - Françoise Quignard
- Institut Charles Gerhardt Montpellier-UMR 5253 CNRS-UMII-ENSCM-UMI
- Matériaux Avancés pour la Catalyse et la Santé
- 34296 Montpellier Cedex 5
- France
| | - David Díaz Díaz
- Institut für Organische Chemie
- Universität Regensburg
- 93053 Regensburg
- Germany
- IQAC-CSIC
| |
Collapse
|
11
|
Tang C, Saquing CD, Morton SW, Glatz BN, Kelly RM, Khan SA. Cross-linked polymer nanofibers for hyperthermophilic enzyme immobilization: approaches to improve enzyme performance. ACS Appl Mater Interfaces 2014; 6:11899-906. [PMID: 25058141 DOI: 10.1021/am5033633] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
We report an enzyme immobilization method effective at elevated temperatures (up to 105 °C) and sufficiently robust for hyperthermophilic enzymes. Using a model hyperthermophilic enzyme, α-galactosidase from Thermotoga maritima, immobilization within chemically cross-linked poly(vinyl alcohol) (PVA) nanofibers to provide high specific surface area is achieved by (1) electrospinning a blend of a PVA and enzyme and (2) chemically cross-linking the polymer to entrap the enzyme within a water insoluble PVA fiber. The resulting enzyme-loaded nanofibers are water-insoluble at elevated temperatures, and enzyme leaching is not observed, indicating that the cross-linking effectively immobilizes the enzyme within the fibers. Upon immobilization, the enzyme retains its hyperthermophilic nature and shows improved thermal stability indicated by a 5.5-fold increase in apparent half-life at 90 °C, but with a significant decrease in apparent activity. The loss in apparent activity is attributed to enzyme deactivation and mass transfer limitations. Improvements in the apparent activity can be achieved by incorporating a cryoprotectant during immobilization to prevent enzyme deactivation. For example, immobilization in the presence of trehalose improved the apparent activity by 10-fold. Minimizing the mat thickness to reduce interfiber diffusion was a simple and effective method to further improve the performance of the immobilized enzyme.
Collapse
Affiliation(s)
- Christina Tang
- Department of Chemical and Biomolecular Engineering North Carolina State University , Raleigh, North Carolina 27695, United States
| | | | | | | | | | | |
Collapse
|
12
|
Zeng HY, Liu XY, He P, Peng DH, Fan B, Xia K. Lipase adsorption on woven nylon-6 membrane: Optimization, kinetic and thermodynamic analyses. BIOCATAL BIOTRANSFOR 2014. [DOI: 10.3109/10242422.2014.895334] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
13
|
Garlapati VK, Banerjee R. Solvent-Free Synthesis of Flavour Esters through Immobilized Lipase Mediated Transesterification. Enzyme Res 2013; 2013:367410. [PMID: 23819043 DOI: 10.1155/2013/367410] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 04/20/2013] [Accepted: 05/13/2013] [Indexed: 11/17/2022] Open
Abstract
The synthesis of methyl butyrate and octyl acetate through immobilized Rhizopus oryzae NRRL 3562 lipase mediated transesterification was studied under solvent-free conditions. The effect of different transesterification variables, namely, molarity of alcohol, reaction time, temperature, agitation, addition of water, and enzyme amount on molar conversion (%) was investigated. A maximum molar conversion of 70.42% and 92.35% was obtained in a reaction time of 14 and 12 h with the transesterification variables of 0.6 M methanol in vinyl butyrate and 2 M octanol in vinyl acetate using 80 U and 60 U immobilized lipase with the agitation speed of 200 rpm and 0.2% water addition at 32°C and 36°C for methyl butyrate and octyl acetate, respectively. The immobilized enzyme has retained good relative activity (more than 95%) up to five and six recycles for methyl butyrate and octyl acetate, respectively. Hence, the present investigation makes a great impingement in natural flavour industry by introducing products synthesized under solvent-free conditions to the flavour market.
Collapse
|
14
|
Garlapati VK, Kumari A, Mahapatra P, Banerjee R. Modeling, Simulation, and Kinetic Studies of Solvent-Free Biosynthesis of Benzyl Acetate. J CHEM-NY 2013; 2013:1-9. [DOI: 10.1155/2013/451652] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Solvent-free biosynthesis of benzyl acetate through immobilized lipase-mediated transesterification has been modeled and optimized through statistical integrated artificial intelligence approach. A nonlinear response surface model has been successfully developed based on central composite design with transesterification variables, namely, molarity of alcohol, reaction time, temperature, and immobilized lipase amount as input variables and molar conversion (%) as an output variable. Statistical integrated genetic algorithm optimization approach results in an optimized molar conversion of 96.32% with the predicted transesterification variables of 0.47 M alcohol molarity in a reaction time of 13.1 h, at 37.5°C using 13.31 U of immobilized lipase. Immobilized lipase withstands more than 98% relative activity up to 6 recycles and maintains 50% relative activity until 12 recycles. The kinetic constants of benzyl acetate, namely,KmandVmaxwere found to be 310 mM and 0.10 mmol h−1 g−1, respectively.
Collapse
|
15
|
Affiliation(s)
- Xiaobing Zheng
- School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Qi Wang
- School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China
| | - Yanjun Jiang
- School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China
- National Key Laboratory of Biochemical
Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
| | - Jing Gao
- School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, China
| |
Collapse
|
16
|
Risso FVA, Mazutti MA, Treichel H, Costa F, Maugeri F, Rodrigues MI. Assessment of fructooligosaccharides production from sucrose in aqueous and aqueous-organic systems using immobilized inulinase from Kluyveromyces marxianus NRRL Y-7571. Food Sci Technol 2012. [DOI: 10.1590/s0101-20612012005000030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
This work investigated the fructooligosaccharides (FOS) synthesis by immobilized inulinase obtained from Kluyveromyces marxianus NRRL Y-7571 in aqueous and aqueous-organic systems using sucrose as substrate. The sequential strategy of experimental design was used to optimize the FOS conversion in both systems. For the aqueous-organic system, a 2(6-2) fractional design was carried out to evaluate the effects of temperature, sucrose concentration, pH, aqueous/organic ratio, enzyme activity, and polyethylene glycol concentration. For the aqueous system, a central composite design for the enzyme activity and the sucrose concentration was carried out. The highest fructooligosaccharides yield (Y FOS) for the aqueous-organic system was 18.2 ± S0.9 wt%, at 40 ºC, pH 5.0, sucrose concentration of 60% (w/w), enzyme activity of 4 U.mL-1, and aqueous/organic ratio of 25/75 wt%. The highest Y FOS for the aqueous system was 14.6 ± 0.9 wt% at 40 ºC, pH 5.0, sucrose concentration of 60 wt%, and enzyme activity of 4.0 U.mL-1.
Collapse
|
17
|
Shu C, Cai J, Huang L, Zhu X, Xu Z. Biocatalytic production of ethyl butyrate from butyric acid with immobilized Candida rugosa lipase on cotton cloth. ACTA ACUST UNITED AC 2011; 72:139-44. [DOI: 10.1016/j.molcatb.2011.05.011] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
18
|
Bayramoglu G, Karagoz B, Altintas B, Yakup Arica M, Bicak N. Poly(styrene–divinylbenzene) beads surface functionalized with di-block polymer grafting and multi-modal ligand attachment: performance of reversibly immobilized lipase in ester synthesis. Bioprocess Biosyst Eng 2011; 34:735-46. [DOI: 10.1007/s00449-011-0523-1] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2010] [Accepted: 02/04/2011] [Indexed: 10/18/2022]
|
19
|
Risso FVA, Mazutti MA, Costa F, Treichel H, Maugeri F, Rodrigues MI. Comparative studies of the stability of free and immobilized inulinase from Kluyveromyces marxianus NRRL Y-7571 in aqueous-organic solutions. Braz J Chem Eng 2010. [DOI: 10.1590/s0104-66322010000400002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
20
|
Kolling DJ, Suguino WA, Angonesi Brod FC, Arisi ACM. Immobilization of a Recombinant Esterase from Lactobacillus plantarum on Polypropylene Accurel MP1000. Appl Biochem Biotechnol 2011; 163:304-12. [DOI: 10.1007/s12010-010-9039-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2010] [Accepted: 07/05/2010] [Indexed: 10/19/2022]
|
21
|
|
22
|
Garlapati VK, Banerjee R. Evolutionary and swarm intelligence-based approaches for optimization of lipase extraction from fermented broth. Eng Life Sci 2010. [DOI: 10.1002/elsc.200900086] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
|
23
|
Riaz M, Shah AA, Hameed A, Hasan F. Characterization of lipase produced by Bacillus sp. FH5 in immobilized and free state. ANN MICROBIOL 2010; 60:169-75. [DOI: 10.1007/s13213-009-0012-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
|
24
|
Garlapati VK, Vundavilli PR, Banerjee R. Evaluation of lipase production by genetic algorithm and particle swarm optimization and their comparative study. Appl Biochem Biotechnol 2010; 162:1350-61. [PMID: 20099046 DOI: 10.1007/s12010-009-8895-2] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2009] [Accepted: 12/21/2009] [Indexed: 10/19/2022]
Abstract
This paper presents the nature-inspired genetic algorithm (GA) and particle swarm optimization (PSO) approaches for optimization of fermentation conditions of lipase production for enhanced lipase activity. The central composite non-linear regression model of lipase production served as the optimization problem for PSO and GA approaches. The overall optimized fermentation conditions obtained thereby, when verified experimentally, have brought about a significant improvement (more than 15 U/gds (gram dry substrate)) in the lipase titer value. The performance of both optimization approaches in terms of computational time and convergence rate has been compared. The results show that the PSO approach (96.18 U/gds in 46 generations) has slightly better performance and possesses better convergence and computational efficiency than the GA approach (95.34 U/gds in 337 generations). Hence, the proposed PSO approach with the minimal parameter tuning is a viable tool for optimization of fermentation conditions of enzyme production.
Collapse
Affiliation(s)
- Vijay Kumar Garlapati
- Microbial Biotechnology and Downstream Processing Laboratory, Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | | | | |
Collapse
|
25
|
Kumari A, Mahapatra P, Garlapati VK, Banerjee R. Enzymatic transesterification of Jatropha oil. Biotechnol Biofuels 2009; 2:1. [PMID: 19144158 PMCID: PMC2639572 DOI: 10.1186/1754-6834-2-1] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2008] [Accepted: 01/14/2009] [Indexed: 05/03/2023]
Abstract
BACKGROUND Transesterification of Jatropha oil was carried out in t-butanol solvent using immobilized lipase from Enterobacter aerogenes. The presence of t-butanol significantly reduced the negative effects caused by both methanol and glycerol. The effects of various reaction parameters on transesterification of Jatropha oil were studied. RESULTS The maximum yield of biodiesel was 94% (of which 68% conversion was achieved with respect to methyl oleate) with an oil:methanol molar ratio of 1:4, 50 U of immobilized lipase/g of oil, and a t-butanol:oil volume ratio of 0.8:1 at 55 degrees C after 48 h of reaction time. There was negligible loss in lipase activity even after repeated use for seven cycles. CONCLUSION To the best of our knowledge this is the first report on biodiesel synthesis using immobilized E. aerogenes lipase.
Collapse
Affiliation(s)
- Annapurna Kumari
- Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Paramita Mahapatra
- Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Vijay Kumar Garlapati
- Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| | - Rintu Banerjee
- Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur, West Bengal 721302, India
| |
Collapse
|