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Ling FWM, Abdulbari HA, Chin SY. Heterogeneous Microfluidic Reactors: A Review and an Insight of Enzymatic Reactions. CHEMBIOENG REVIEWS 2022. [DOI: 10.1002/cben.202100058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Fiona W. M. Ling
- Universiti Malaysia Pahang Centre for Research in Advanced Fluid & Processes (FLUID CENTRE) Lebuhraya Tun Razak 26300 Gambang, Kuantan Pahang Malaysia
- Universiti Malaysia Pahang Department of Chemical Engineering, College of Engineering Lebuhraya Tun Razak 26300 Gambang, Kuantan Pahang Malaysia
| | - Hayder A. Abdulbari
- Universiti Malaysia Pahang Centre for Research in Advanced Fluid & Processes (FLUID CENTRE) Lebuhraya Tun Razak 26300 Gambang, Kuantan Pahang Malaysia
- Universiti Malaysia Pahang Department of Chemical Engineering, College of Engineering Lebuhraya Tun Razak 26300 Gambang, Kuantan Pahang Malaysia
| | - Sim Yee Chin
- Universiti Malaysia Pahang Department of Chemical Engineering, College of Engineering Lebuhraya Tun Razak 26300 Gambang, Kuantan Pahang Malaysia
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Enzyme Immobilization and Co-Immobilization: Main Framework, Advances and Some Applications. Processes (Basel) 2022. [DOI: 10.3390/pr10030494] [Citation(s) in RCA: 54] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Enzymes are outstanding (bio)catalysts, not solely on account of their ability to increase reaction rates by up to several orders of magnitude but also for the high degree of substrate specificity, regiospecificity and stereospecificity. The use and development of enzymes as robust biocatalysts is one of the main challenges in biotechnology. However, despite the high specificities and turnover of enzymes, there are also drawbacks. At the industrial level, these drawbacks are typically overcome by resorting to immobilized enzymes to enhance stability. Immobilization of biocatalysts allows their reuse, increases stability, facilitates process control, eases product recovery, and enhances product yield and quality. This is especially important for expensive enzymes, for those obtained in low fermentation yield and with relatively low activity. This review provides an integrated perspective on (multi)enzyme immobilization that abridges a critical evaluation of immobilization methods and carriers, biocatalyst metrics, impact of key carrier features on biocatalyst performance, trends towards miniaturization and detailed illustrative examples that are representative of biocatalytic applications promoting sustainability.
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Macro-Batch and Continuously Operated Microfluidic Emulsification—Differences, Similarities and Optimization. Processes (Basel) 2022. [DOI: 10.3390/pr10030449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
Abstract
In this work, the emulsification of oil-in-water two-phase systems with three emulsifiers (PEG1500, 6000 and 20000) was studied in a batch macro system and in a continuously operated microfluidic system. The effect of emulsifier concentration, oil concentration and mixing rate on zeta potential and average Feret diameter was analyzed for the macro-batch system, while the effect of emulsifier concentration, oil concentration and total flow rate on zeta potential and average Feret diameter was analyzed for the microfluidic system. The emulsions prepared in batch system were more stable, had smaller droplet diameter but higher values of polydispersity index (PDI) compared to those prepared by continuous method. In both cases, batch and continuous, the use of PEG with higher molecular weight resulted in emulsions with lower zeta potential values. In batch emulsification, all three optimization parameters (emulsifier concentration, oil concentration and mixing rate) had a significant influence on the average Feret diameter and zeta potential (depending on the PEG, used for emulsification), while the emulsifier concentration had the most significant influence on the zeta potential and average Feret diameter of emulsions prepared in the continuous microsystem process.
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Lee SY, Kim D, Lee SH, Sung JH. Microtechnology-based in vitro models: Mimicking liver function and pathophysiology. APL Bioeng 2021; 5:041505. [PMID: 34703969 PMCID: PMC8520487 DOI: 10.1063/5.0061896] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 09/21/2021] [Indexed: 02/06/2023] Open
Abstract
The liver plays important roles in drug metabolism and homeostasis. The metabolism and biotransformation can not only affect the efficacy of drugs but also result in hepatotoxicity and drug-induced liver injury. Understanding the complex physiology of the liver and the pathogenetic mechanisms of liver diseases is essential for drug development. Conventional in vitro models have limitations in the ability to predict drug effects, due to the lack of physiological relevance. Recently, the liver-on-a-chip platform has been developed to reproduce the microarchitecture and in vivo environment of the liver. These efforts have improved the physiological relevance of the liver tissue used in the platform and have demonstrated its applicability to drug screening and disease models. In this review, we summarize the recent development of liver-on-a-chip models that closely mimic the in vivo liver environments and liver diseases.
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Affiliation(s)
- Seung Yeon Lee
- Department of Chemical Engineering, Hongik University, Seoul 04066, South Korea
| | - Donghyun Kim
- School of Electrical and Electronic Engineering, Yonsei University, Seoul 03722, South Korea
| | - Seung Hwan Lee
- Department of Bionano Engineering, Center for Bionano Intelligence Education and Research, Hanyang University, Ansan 15588, South Korea
| | - Jong Hwan Sung
- Department of Chemical Engineering, Hongik University, Seoul 04066, South Korea
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González-Fernández C, Gómez-Pastora J, Bringas E, Zborowski M, Chalmers JJ, Ortiz I. Recovery of Magnetic Catalysts: Advanced Design for Process Intensification. Ind Eng Chem Res 2021; 60:16780-16790. [PMID: 34866775 PMCID: PMC8630691 DOI: 10.1021/acs.iecr.1c03474] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Indexed: 11/28/2022]
Abstract
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The design of microdevices
in which components with magnetic character
must be separated and recovered from reactive media benefits from
the advantages of microfluidics and meets the criteria for process
intensification; however, there are open questions, such as the design
of the most appropriate magnet arrangement, that need further research
in order to increase the magnetic gradient exerted on the particles.
Herein, we focus on the continuous recovery of magnetic microparticles,
that can be used as support to facilitate the recovery of biocatalysts
(magnetic microcatalysts, MMCs) from biological fluids. We analyze
and compare the performance of two typical magnetophoretic microdevices
for addressing bead recovery: (i) annular channels with a quadrupole
orientation of the permanent magnets (quadrupole magnetic sorter,
QMS) and (ii) the standard design, which consists of rectangular channels
with a single permanent magnet to generate the magnetic field. To
this end, an experimentally validated computational fluid dynamics
(CFD) numerical model has been employed. Our results reveal that for
devices with the same width and length, the micro-QMS, in comparison
to a rectangular channel, could accomplish the complete particle retrieval
while (i) processing more than 4 times higher fluid velocities, treating
more than 360 times higher flow rates or (ii) working with smaller
particles, thus reducing by 55% the particle mass. Additionally, the
parallel performance of ≈300 micro-QMSs fulfills the processing
of flow rates as high as 200 L·h–1 while entirely
capturing the magnetic beads. Thereby, this work shows the potential
of the QMS advanced design in the intensification of the recovery
of catalysts supports of magnetic character.
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Affiliation(s)
- Cristina González-Fernández
- Department of Chemical and Biomolecular Engineering, ETSIIT, University of Cantabria, Avda. Los Castros s/n, 39005 Santander, Spain
| | - Jenifer Gómez-Pastora
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 W. Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Eugenio Bringas
- Department of Chemical and Biomolecular Engineering, ETSIIT, University of Cantabria, Avda. Los Castros s/n, 39005 Santander, Spain
| | - Maciej Zborowski
- Department of Biomedical Engineering Cleveland Clinic 9500 Euclid Avenue, Cleveland, Ohio 44195, United States
| | - Jeffrey J Chalmers
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, 151 W. Woodruff Avenue, Columbus, Ohio 43210, United States
| | - Inmaculada Ortiz
- Department of Chemical and Biomolecular Engineering, ETSIIT, University of Cantabria, Avda. Los Castros s/n, 39005 Santander, Spain
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Zhang H, Bai Y, Zhu N, Xu J. Microfluidic reactor with immobilized enzyme-from construction to applications: A review. Chin J Chem Eng 2021. [DOI: 10.1016/j.cjche.2020.12.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Continuous Integrated Process of Biodiesel Production and Purification—The End of the Conventional Two-Stage Batch Process? ENERGIES 2021. [DOI: 10.3390/en14020403] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this research, optimization of the integrated biodiesel production process composed of transesterification of edible sunflower oil, catalyzed by commercial lipase, with simultaneous extraction of glycerol from the reaction mixture was performed. Deep eutectic solvents (DESs) were used in this integrated process as the reaction and extraction media. For two systems, choline chloride:glycerol (ChCl:Gly) and choline chloride:ethylene glycol (ChCl:EG), respectively, the optimal water content, mass ratio of the phase containing the mixture of reactants (oil and methanol) with an enzyme and a DES phase (mass ratio of phases), and the molar ratio of deep eutectic solvent constituents were determined using response surface methodology (RSM). Experiments performed with ChCl:Gly resulted in a higher biodiesel yield and higher glycerol extraction efficiency, namely, a mass ratio of phases of 1:1, a mass fraction of water of 6.6%, and a molar ratio of the ChCl:Gly of 1:3.5 were determined to be the optimal process conditions. When the reaction was performed in a batch reactor under the optimal conditions, the process resulted in a 43.54 ± 0.2% yield and 99.54 ± 0.19% glycerol extraction efficiency (t = 2 h). Unfortunately, the free glycerol content was higher than the one defined by international standards (wG > 0.02%); therefore, the process was performed in a microsystem to enhance the mass transfer. Gaining the same yield and free glycerol content below the standards (wG = 0.0019 ± 0.003%), the microsystem proved to be a good direction for future process optimization.
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Šalić A, Jurinjak Tušek A, Gojun M, Zelić B. Biodiesel purification in microextractors: Choline chloride based deep eutectic solvents vs water. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116783] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Wiltschi B, Cernava T, Dennig A, Galindo Casas M, Geier M, Gruber S, Haberbauer M, Heidinger P, Herrero Acero E, Kratzer R, Luley-Goedl C, Müller CA, Pitzer J, Ribitsch D, Sauer M, Schmölzer K, Schnitzhofer W, Sensen CW, Soh J, Steiner K, Winkler CK, Winkler M, Wriessnegger T. Enzymes revolutionize the bioproduction of value-added compounds: From enzyme discovery to special applications. Biotechnol Adv 2020; 40:107520. [DOI: 10.1016/j.biotechadv.2020.107520] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 10/18/2019] [Accepted: 01/13/2020] [Indexed: 12/11/2022]
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Transesterification in Microreactors-Overstepping Obstacles and Shifting Towards Biodiesel Production on a Microscale. MICROMACHINES 2020; 11:mi11050457. [PMID: 32354086 PMCID: PMC7281739 DOI: 10.3390/mi11050457] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/24/2020] [Accepted: 04/24/2020] [Indexed: 12/03/2022]
Abstract
Biodiesel, which was earlier used only as an alternative fuel, is now an indispensable component of commercial diesel. Conventional production processes are unable to cope with the increasing demand for biodiesel, and therefore more and more work is being done to intensify the existing processes. The intensification of the biodiesel production process, taking into account the environmental and economic factors, is based on increasing productivity. One way to achieve that is by reducing the volume of production units. The application of the enzymatic reaction path, while reducing the volume of process equipment to the micro-level, has significantly magnified the productivity of the biodiesel production process, which is primarily due to better mass transfer in microsystems. Additional breakthrough is the use of deep eutectic solvents (DES) instead of buffers for enzyme stabilization. In this study, a lipase from Thermomyces lanuginosus (TlL) (both commercial and produced by solid-state fermentation) was used as a catalyst for biodiesel production. Edible and waste sunflower oil, as well as methanol, were used as substrates. The reaction mediums were buffer and DES. The transesterification reaction was carried out in a batch reactor and the emphasis was made on different microreactor configurations. The highest yield of 32% for residence time of only τ = 30 min was obtained in the microreactor system with an emulsion of waste oil and a commercial enzyme suspended in a buffer. This indicates that enzymatic transesterification could be a valuable reaction path for dealing with waste oils. Furthermore, biodiesel synthesis in DES showed somewhat lower yields, but by increasing the water content in the system, the reaction could prove much better results. In the end, the effects of reaction conditions on the volumetric productivity of the process were analyzed.
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De Santis P, Meyer LE, Kara S. The rise of continuous flow biocatalysis – fundamentals, very recent developments and future perspectives. REACT CHEM ENG 2020. [DOI: 10.1039/d0re00335b] [Citation(s) in RCA: 73] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Very recent developments in the field of biocatalysis in continuously operated systems. Special attention on the future perspectives in this key emerging technological area ranging from process analytical technologies to digitalization.
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Affiliation(s)
- Piera De Santis
- Aarhus University
- Department of Engineering, Biological and Chemical Engineering Section
- Biocatalysis and Bioprocessing Group
- DK 8000 Aarhus
- Denmark
| | - Lars-Erik Meyer
- Aarhus University
- Department of Engineering, Biological and Chemical Engineering Section
- Biocatalysis and Bioprocessing Group
- DK 8000 Aarhus
- Denmark
| | - Selin Kara
- Aarhus University
- Department of Engineering, Biological and Chemical Engineering Section
- Biocatalysis and Bioprocessing Group
- DK 8000 Aarhus
- Denmark
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Mařík K, Tichá L, Vobecká L, Přibyl M. Theoretical study on enzyme synthesis of cephalexin in a parallel-flow microreactor combined with electrically driven ATPS microextraction. REACT CHEM ENG 2020. [DOI: 10.1039/c9re00482c] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A mathematical model of a microfluidic device with two aqueous phases for the simultaneous cephalexin production and its separation from a reaction mixture was developed. The model anticipates the continuous cephalexin synthesis and enzyme recyclation.
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Affiliation(s)
- Karel Mařík
- Department of Chemical Engineering
- University of Chemistry and Technology, Prague
- 166 28 Praha 6
- Czech Republic
| | - Linda Tichá
- Department of Chemical Engineering
- University of Chemistry and Technology, Prague
- 166 28 Praha 6
- Czech Republic
| | - Lucie Vobecká
- Department of Chemical Engineering
- University of Chemistry and Technology, Prague
- 166 28 Praha 6
- Czech Republic
| | - Michal Přibyl
- Department of Chemical Engineering
- University of Chemistry and Technology, Prague
- 166 28 Praha 6
- Czech Republic
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