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González-Peñas H, Eibes G, Lu-Chau T, Moreira M, Lema J. Altered Clostridia response in extractive ABE fermentation with solvents of different nature. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2019.107455] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Gamallo M, Moldes-Diz Y, Eibes G, Feijoo G, Lema JM, Moreira MT. Sequential reactors for the removal of endocrine disrupting chemicals by laccase immobilized onto fumed silica microparticles. BIOCATAL BIOTRANSFOR 2017. [DOI: 10.1080/10242422.2017.1316489] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- M. Gamallo
- Department of Chemical Engineering, Institute of Technology, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Y. Moldes-Diz
- Department of Chemical Engineering, Institute of Technology, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - G. Eibes
- Department of Chemical Engineering, Institute of Technology, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - G. Feijoo
- Department of Chemical Engineering, Institute of Technology, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - J. M. Lema
- Department of Chemical Engineering, Institute of Technology, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - M. T. Moreira
- Department of Chemical Engineering, Institute of Technology, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
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Arca-Ramos A, Kumar VV, Eibes G, Moreira MT, Cabana H. Recyclable cross-linked laccase aggregates coupled to magnetic silica microbeads for elimination of pharmaceuticals from municipal wastewater. Environ Sci Pollut Res Int 2016; 23:8929-8939. [PMID: 26817474 DOI: 10.1007/s11356-016-6139-x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 01/19/2016] [Indexed: 06/05/2023]
Abstract
In the present work, the use of magnetic mesoporous silica microbeads (MMSMB) as supports was proposed to produce magnetically-separable cross-linked enzyme aggregates (MCLEAs). The effects of cross linking time, addition of bovine serum albumin as protein feeder, pH, glutaraldehyde concentration, and laccase:MMSMB mass ratio on the immobilization yield and enzyme load were investigated. The best conditions allowed the rapid preparation of MCLEAs with high enzyme load, i.e., 1.53 U laccase/mg MCLEAs. The stability of MCLEAs was improved with regard to low pH, presence of chemical denaturants, and real wastewater matrix, compared to free laccase. In addition, the novel biocatalyst exhibited good operational stability, maintaining up to 70 % of its initial activity after 10 successive batch reactions. Finally, MCLEAs demonstrated its catalytic potential to transform acetaminophen and various non-phenolic pharmaceutical active compounds as mefenamic acid, fenofibrate, and indomethacin from biologically treated wastewater effluent, with similar or even higher efficiency than free laccase.
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Affiliation(s)
- A Arca-Ramos
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - V V Kumar
- Department of Biotechnology, School of Bioengineering, SRM University, Kattankulathur, Chennai, 603203, India
| | - G Eibes
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - M T Moreira
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - H Cabana
- Department of Civil Engineering, Université de Sherbrooke, 2500 Boulevard de l'Université, Sherbrooke, Québec, J1K 2R1, Canada.
- Environmental Engineering Laboratory, Department of Civil Engineering, Université de Sherbrooke, 2500 Boulevard de l'Université, Sherbrooke, Québec, J1K 2R1, Canada.
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Arca-Ramos A, Ammann EM, Gasser CA, Nastold P, Eibes G, Feijoo G, Lema JM, Moreira MT, Corvini PFX. Assessing the use of nanoimmobilized laccases to remove micropollutants from wastewater. Environ Sci Pollut Res Int 2016; 23:3217-3228. [PMID: 26490891 DOI: 10.1007/s11356-015-5564-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2015] [Accepted: 10/06/2015] [Indexed: 06/05/2023]
Abstract
Enzymes immobilization is a useful way to allow enzyme reuse and increase their stability. A high redox potential laccase from Trametes versicolor (TvL) and a low redox potential, but commercially available low-cost laccase from Myceliophthora thermophila (MtL), were successfully immobilized and co-immobilized onto fumed silica nanoparticles (fsNP). Enzyme loads of 1.78 ± 0.07, 0.69 ± 0.03, and 1.10 ± 0.01 U/mg fsNP were attained for the optimal doses of TvL, MtL, and co-immobilized laccases, respectively. In general, the laccase-fsNP conjugates showed a higher resistance against an acidic pH value (i.e., pH 3), and a higher storage stability than free enzymes. In addition, immobilized enzymes exhibited a superior long-term stability than free laccases when incubated in a secondary effluent from a municipal wastewater treatment plant (WWTP). For instance, the residual activity after 2 weeks for the co-immobilized laccases and the mixture of free laccases were 40.2 ± 2.5% and 16.8 ± 1.0%, respectively. The ability of the laccase-fsNP to remove a mixture of (14)C-bisphenol A (BPA) and (14)C-sodium diclofenac (DCF) from spiked secondary effluents was assessed in batch experiments. The catalytic efficiency was highly dependent on both the microbial source and state of the biocatalyst. The high redox potential TvL in free form attained a four-fold higher percentage of BPA transformation than the free MtL. Compared to free laccases, immobilized enzymes led to much slower rates of BPA transformation. For instance, after 24 h, the percentages of BPA transformation by 1000 U/L of a mixture of free laccases or co-immobilized enzymes were 67.8 ± 5.2 and 27.0 ± 3.9%, respectively. Nevertheless, the use of 8000 U/L of co-immobilized laccase led to a nearly complete removal of BPA, despite the unfavorable conditions for laccase catalysis (pH ~ 8.4). DCF transformation was not observed for any of the enzymatic systems, showing that this compound is highly recalcitrant toward laccase oxidation under realistic conditions.
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Affiliation(s)
- A Arca-Ramos
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain.
| | - E M Ammann
- Institute for Ecopreneurship, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Gründenstrasse 40, Muttenz, 4132, Switzerland
| | - C A Gasser
- Institute for Ecopreneurship, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Gründenstrasse 40, Muttenz, 4132, Switzerland
| | - P Nastold
- Institute for Ecopreneurship, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Gründenstrasse 40, Muttenz, 4132, Switzerland
| | - G Eibes
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - G Feijoo
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - J M Lema
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - M T Moreira
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, 15782, Santiago de Compostela, Spain
| | - P F-X Corvini
- Institute for Ecopreneurship, School of Life Sciences, University of Applied Sciences and Arts Northwestern Switzerland, Gründenstrasse 40, Muttenz, 4132, Switzerland
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University Xianlin Campus, Xianlin Avenue 163, Nanjing, 210023, China
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Arca-Ramos A, Eibes G, Feijoo G, Lema JM, Moreira MT. Potentiality of a ceramic membrane reactor for the laccase-catalyzed removal of bisphenol A from secondary effluents. Appl Microbiol Biotechnol 2015. [DOI: 10.1007/s00253-015-6826-4] [Citation(s) in RCA: 27] [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: 11/28/2022]
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Taboada-Puig R, Eibes G, Lloret L, Lú-Chau TA, Feijoo G, Moreira MT, Lema JM. Fostering the action of versatile peroxidase as a highly efficient biocatalyst for the removal of endocrine disrupting compounds. N Biotechnol 2015; 33:187-95. [PMID: 26028522 DOI: 10.1016/j.nbt.2015.05.003] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 04/03/2015] [Accepted: 05/20/2015] [Indexed: 11/28/2022]
Abstract
Response surface methodology (RSM) was used to optimize the removal of five endocrine disrupting compounds (EDCs) by the enzyme versatile peroxidase (VP): bisphenol A (BPA), triclosan (TCS), estrone (E1), 17β-estradiol (E2) and 17α-ethinylestradiol (EE2). The optimal variables of enzyme activity (90-100 U L(-1)), sodium malonate (29-43 mM) and MnSO4 (0.8-1 mM) led to very high removal rates of the five pollutants (2.5-5.0 mg L(-1) min(-1)). The structural elucidation of transformation products arising from the enzymatic catalysis of the EDCs was investigated by Gas Chromatography coupled to Mass Spectrometry (GC-MS) and Liquid Chromatography Electrospray Time-of-Flight Mass Spectrometry (LC-ESI-TOF-MS). The presence of dimers and trimers, indicative of oxidative coupling, was demonstrated.
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Affiliation(s)
- R Taboada-Puig
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - G Eibes
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
| | - L Lloret
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - T A Lú-Chau
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - G Feijoo
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - M T Moreira
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | - J M Lema
- Department of Chemical Engineering, Institute of Technology, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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Arca-Ramos A, Eibes G, Feijoo G, Lema J, Moreira M. Coupling extraction and enzyme catalysis for the removal of anthracene present in polluted soils. Biochem Eng J 2015. [DOI: 10.1016/j.bej.2014.10.015] [Citation(s) in RCA: 8] [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: 11/25/2022]
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Lloret L, Eibes G, Feijoo G, Moreira M, Lema J. Continuous operation of a fluidized bed reactor for the removal of estrogens by immobilized laccase on Eupergit supports. J Biotechnol 2012; 162:404-6. [DOI: 10.1016/j.jbiotec.2012.04.007] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Revised: 04/07/2012] [Accepted: 04/16/2012] [Indexed: 11/29/2022]
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Arca-Ramos A, Eibes G, Moreira M, Feijoo G, Lema J. Surfactant-assisted two phase partitioning bioreactors for laccase-catalyzed degradation of anthracene. Process Biochem 2012. [DOI: 10.1016/j.procbio.2012.04.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Lloret L, Eibes G, Feijoo G, Moreira MT, Lema JM. Degradation of estrogens by laccase from Myceliophthora thermophila in fed-batch and enzymatic membrane reactors. J Hazard Mater 2012; 213-214:175-183. [PMID: 22342900 DOI: 10.1016/j.jhazmat.2012.01.082] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2011] [Revised: 01/19/2012] [Accepted: 01/23/2012] [Indexed: 05/31/2023]
Abstract
Several studies reported that natural and synthetic estrogens are the major contributors to the estrogenic activity associated with the effluents of wastewater treatment plants. The ability of the enzyme laccase to degrade these compounds in batch experiments has been demonstrated in previous studies. Nevertheless, information is scarce regarding in vitro degradation of estrogens in continuous enzymatic bioreactors. The present work constitutes an important step forward for the implementation of an enzymatic reactor for the continuous removal of estrone (E1) and estradiol (E2) by free laccase from Myceliophthora thermophila. In a first step, the effect of the main process parameters (pH, enzyme level, gas composition (air or oxygen) and estrogen feeding rate) were evaluated in fed-batch bioreactors. E1 and E2 were oxidized by 94.1 and 95.5%, respectively, under the best conditions evaluated. Thereafter, an enzymatic membrane reactor (EMR) was developed to perform the continuous degradation of the estrogens. The configuration consisted of a stirred tank reactor coupled with an ultrafiltration membrane, which allowed the recovery of enzyme while both estrogens and degradation products could pass through it. The highest removal rates at steady state conditions were up to 95% for E1 and nearly complete degradation for E2. Furthermore, the residual estrogenic activity of the effluent was largely reduced up to 97%.
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Affiliation(s)
- L Lloret
- Dept. of Chemical Engineering, School of Engineering, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
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Eibes G, Moreira MT, Feijoo G, Lema JM. Enzymatic degradation of low soluble compounds in monophasic water: solvent reactors. Kinetics and modeling of anthracene degradation by MnP. Biotechnol Bioeng 2008; 100:619-26. [PMID: 18306424 DOI: 10.1002/bit.21806] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are toxic compounds presenting low water solubility and high hydrophobicity, which greatly hampers their natural biodegradation. The enzymatic degradation of a model compound, anthracene, was evaluated in presence of a miscible solvent for an increased solubility. Manganese peroxidase, a ligninolytic enzyme from white-rot fungi, was used as biocatalyst in a medium containing acetone. The kinetic parameters of the enzymatic degradation of anthracene, obtained from fed-batch experiments, were applied to model the operation of a continuous reactor. Kinetics comprised a Michaelis-Menten equation, modified with an autocatalytic term, assumed to the effect of quinones acting as electron carriers, and a logistic function related to enzyme activity. The continuous reactor has been operated for 108 h, attaining a 90% of anthracene degradation, which demonstrated the feasibility of the system for its application in the removal of poorly soluble compounds. The model of this reactor permitted to predict accurately anthracene degradation in different conditions, such as external addition of anthraquinone and different enzymatic activities.
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Affiliation(s)
- G Eibes
- Department of Chemical Engineering, School of Engineering, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain.
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Eibes G, Moreira MT, Feijoo G, Daugulis AJ, Lema JM. Operation of a two-phase partitioning bioreactor for the oxidation of anthracene by the enzyme manganese peroxidase. Chemosphere 2007; 66:1744-51. [PMID: 16904729 DOI: 10.1016/j.chemosphere.2006.07.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2006] [Revised: 06/29/2006] [Accepted: 07/03/2006] [Indexed: 05/11/2023]
Abstract
A study was conducted to determine the potential of a two-phase partitioning bioreactor (TPPB) for the treatment of a poorly soluble compound, anthracene, by the enzyme manganese peroxidase (MnP) from the fungus Bjerkandera sp. BOS55. Silicone oil was used as the immiscible solvent, which contained anthracene at high concentrations. The optimization of the oxidation process was conducted taking into account the factors which may directly affect the MnP catalytic cycle (the concentration of H(2)O(2) and malonic acid) and those that affect the mass transfer of anthracene between the organic and the aqueous phase (solvent and agitation speed). The main objective was carried out in terms of improved efficiency, i.e., maximizing the anthracene oxidized per unit of enzyme used. The TPPB reached nearly complete oxidation of anthracene at a conversion rate of 1.8mgl(-1)h(-1) in 56h, which suggests the application of enzymatic TPPBs for the removal of poorly soluble compounds.
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Affiliation(s)
- G Eibes
- Department of Chemical Engineering, ETSE-Rua Lope Gomez de Marzoa, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain
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Eibes G, Lú-Chau T, Feijoo G, Moreira M, Lema J. Complete degradation of anthracene by Manganese Peroxidase in organic solvent mixtures. Enzyme Microb Technol 2005. [DOI: 10.1016/j.enzmictec.2004.02.010] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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