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Abufalgha AA, Curson ARJ, Lea-Smith DJ, Pott RWM. The effect of Alcanivorax borkumensis SK2, a hydrocarbon-metabolising organism, on gas holdup in a 4-phase bubble column bioprocess. Bioprocess Biosyst Eng 2023; 46:635-644. [PMID: 36757455 DOI: 10.1007/s00449-023-02849-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 01/21/2023] [Indexed: 02/10/2023]
Abstract
To design bioprocesses utilising hydrocarbon-metabolising organisms (HMO) as biocatalysts, the effect of the organism on the hydrodynamics of bubble column reactor (BCR), such as gas holdup, needs to be investigated. Therefore, this study investigates the first use of an HMO, Alcanivorax borkumensis SK2, as a solid phase in the operation and hydrodynamics of a BCR. The study investigated the gas holdup in 3-phase and 4-phase systems in a BCR under ranges of superficial gas velocities (UG) from 1 to 3 cm/s, hydrocarbon (chain length C13-21) concentrations (HC) of 0, 5, and 10% v/v and microbial concentrations (MC) of 0, 0.35, 0.6 g/l. The results indicated that UG was the most significant parameter, as gas holdup increases linearly with increasing UG from 1 to 3 cm/s. Furthermore, the addition of hydrocarbons into the air-deionized water -SK2 system showed the highest increase in the gas holdup, particularly at high UG (above 2 cm/s). The solids (yeast, cornflour, and SK2) phases had differing effects on gas holdup, potentially due to the difference in surface activity. In this work, SK2 addition caused a reduction in the fluid surface tension in the bioprocess which therefore resulted in an increase in the gas holdup in BCR. This work builds upon previous investigations in optimising the hydrodynamics for bubble column hydrocarbon bioprocesses for the application of alkane bioactivation.
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Affiliation(s)
- Ayman A Abufalgha
- Department of Process Engineering, Stellenbosch University, Banghoek Road, Stellenbosch, 7600, South Africa.,School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.,DST-NRF Centre of Excellence in Catalysis (C* Change), Rondebosch, South Africa
| | - Andrew R J Curson
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.,DST-NRF Centre of Excellence in Catalysis (C* Change), Rondebosch, South Africa
| | - David J Lea-Smith
- School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich, NR4 7TJ, UK.,DST-NRF Centre of Excellence in Catalysis (C* Change), Rondebosch, South Africa
| | - Robert W M Pott
- Department of Process Engineering, Stellenbosch University, Banghoek Road, Stellenbosch, 7600, South Africa. .,DST-NRF Centre of Excellence in Catalysis (C* Change), Rondebosch, South Africa.
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2
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Hua X, Han J, Zhou X, Xu Y. Gas pressure intensifying oxygen transfer to significantly improving the bio‐oxidation productivity of whole‐cell catalysis. AIChE J 2022. [DOI: 10.1002/aic.18005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Xia Hua
- Key Laboratory of Forestry Genetics & Biotechnology (Nanjing Forestry University), Ministry of Education Nanjing People's Republic of China
- Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering, Nanjing Forestry University Nanjing People's Republic of China
- Jiangsu Province Key Laboratory of Green Biomass‐based Fuels and Chemicals Nanjing People's Republic of China
| | - Jian Han
- Key Laboratory of Forestry Genetics & Biotechnology (Nanjing Forestry University), Ministry of Education Nanjing People's Republic of China
- Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering, Nanjing Forestry University Nanjing People's Republic of China
- Jiangsu Province Key Laboratory of Green Biomass‐based Fuels and Chemicals Nanjing People's Republic of China
| | - Xin Zhou
- Key Laboratory of Forestry Genetics & Biotechnology (Nanjing Forestry University), Ministry of Education Nanjing People's Republic of China
- Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering, Nanjing Forestry University Nanjing People's Republic of China
- Jiangsu Province Key Laboratory of Green Biomass‐based Fuels and Chemicals Nanjing People's Republic of China
| | - Yong Xu
- Key Laboratory of Forestry Genetics & Biotechnology (Nanjing Forestry University), Ministry of Education Nanjing People's Republic of China
- Jiangsu Co‐Innovation Center of Efficient Processing and Utilization of Forest Resources College of Chemical Engineering, Nanjing Forestry University Nanjing People's Republic of China
- Jiangsu Province Key Laboratory of Green Biomass‐based Fuels and Chemicals Nanjing People's Republic of China
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3
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Abufalgha AA, Pott RWM, Clarke KG. Quantification of oxygen transfer coefficients in simulated hydrocarbon-based bioprocesses in a bubble column bioreactor. Bioprocess Biosyst Eng 2021; 44:1913-1921. [PMID: 33893834 DOI: 10.1007/s00449-021-02571-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 04/09/2021] [Indexed: 12/01/2022]
Abstract
This study investigates the overall volumetric oxygen transfer coefficient (KLa) in multiphase hydrocarbon-based bioprocess under a range of hydrocarbon concentrations (HC), solid loadings (deactivated yeast) (SL) and superficial gas velocities (UG) in a bubble column reactor (BCR). KLa increased with increasing UG in the air-water system; due to an increase in the number of small bubbles which enhanced gas holdup. In air-water-yeast systems, the initial addition of yeast increased KLa significantly. Further increases in SL reduced KLa, due to increases in the bubble size with increasing SL. KLa decreased when HC was added in air-water-hydrocarbon systems. However, UG, SL and HC affected KLa differently in air-water-yeast-hydrocarbon systems: an indication of the complex interactions between the yeast and hydrocarbon phases which changed the system's hydrodynamics and therefore affected KL. This work illustrates the effect of the operating conditions (SL, HC and UG) on oxygen transfer behaviour in multiphase systems.
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Affiliation(s)
- Ayman A Abufalgha
- DST-NRF Centre of Excellence in Catalysis (c* Change), Pretoria, South Africa.,Department of Process Engineering, Stellenbosch University, Banghoek Road, Stellenbosch, 7600, South Africa
| | - Robert W M Pott
- DST-NRF Centre of Excellence in Catalysis (c* Change), Pretoria, South Africa. .,Department of Process Engineering, Stellenbosch University, Banghoek Road, Stellenbosch, 7600, South Africa.
| | - Kim G Clarke
- DST-NRF Centre of Excellence in Catalysis (c* Change), Pretoria, South Africa.,Department of Process Engineering, Stellenbosch University, Banghoek Road, Stellenbosch, 7600, South Africa
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Abufalgha AA, Clarke KG, Pott RW. Characterisation of bubble diameter and gas hold-up in simulated hydrocarbon-based bioprocesses in a bubble column reactor. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107577] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Gakingo G, Clarke K, Louw T. A numerical investigation of the hydrodynamics and mass transfer in a three-phase gas-liquid-liquid stirred tank reactor. Biochem Eng J 2020. [DOI: 10.1016/j.bej.2020.107522] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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6
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Liu LY, Xie GJ, Xing DF, Liu BF, Ding J, Ren NQ. Biological conversion of methane to polyhydroxyalkanoates: Current advances, challenges, and perspectives. ENVIRONMENTAL SCIENCE AND ECOTECHNOLOGY 2020; 2:100029. [PMID: 36160923 PMCID: PMC9487992 DOI: 10.1016/j.ese.2020.100029] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Revised: 04/20/2020] [Accepted: 04/22/2020] [Indexed: 05/13/2023]
Abstract
Methane emissions and plastic pollution are critical global challenges. The biological conversion of methane to poly-β-hydroxybutyrate (PHB) not only mitigates methane emissions but also provides biodegradable polymer substitutes for petroleum-based materials used in plastics production. This work provides an early overview of the methane-based PHB advances and discusses challenges and related strategies. Recent advances of PHB, including PHB biosynthetic pathways, methanotrophs, bioreactors, and the performances of PHB materials are introduced. Major challenges of methane-based PHB production are discussed in detail; these include low efficiency of methanotrophs, low gas-liquid mass transfer efficiency, and poor material properties. To overcome these limitations, various approaches are also explored, such as feast-famine regimes, engineered microorganisms, gas-permeable membrane bioreactors, two-phase partitioning bioreactors, poly-β-hydroxybutyrate-co-hydroxyvalerate synthesis, and molecular weight manipulation.
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Dutta A, Valdivia-Rivera S, Lizardi-Jiménez MA. Simultaneous Diesel and Oxygen Transfer Rate on the Production of an Oil-degrading Consortium in an Airlift Bioreactor: High-dispersed Phase Concentration. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2018. [DOI: 10.1515/ijcre-2017-0206] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
The aim of this study was to simultaneously evaluate diesel transfer rate (DTR) and oxygen transfer rate (OTR) on the production of an oil-degrading consortium in a three-phase airlift bioreactor (ALB) working at high hydrocarbon phase concentration with the purpose of determine whether the oxygen transfer rate is increased or diminished by an increase in the oil-phase concentration. Increase in hydrocarbon concentration allows an increase in DTR and a consequently higher DTR/OTR ratio thus avoiding hydrocarbon mass transfer limitations. This study demonstrates evidence that at high diesel concentrations, the main carbon fate is the production of biosurfactants.
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Amani H. Application of a Dynamic Method for the Volumetric Mass Transfer Coefficient Determination in the Scale-Up of Rhamnolipid Biosurfactant Production. J SURFACTANTS DETERG 2018. [DOI: 10.1002/jsde.12184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Hossein Amani
- Faculty of Chemical Engineering; Babol Noshirvani University of Technology; Babol Iran
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Shi K, Gao Z, Lin L, Wang WJ, Shi XQ, Yu X, Song P, Ren LJ, Huang H, Ji XJ. Manipulating the generation of reactive oxygen species through intermittent hypoxic stress for enhanced accumulation of arachidonic acid-rich lipids. Chem Eng Sci 2018. [DOI: 10.1016/j.ces.2018.04.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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10
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Chan LG, Cohen JL, de Moura Bell JMLN. Conversion of Agricultural Streams and Food-Processing By-Products to Value-Added Compounds Using Filamentous Fungi. Annu Rev Food Sci Technol 2018; 9:503-523. [DOI: 10.1146/annurev-food-030117-012626] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Lauryn G. Chan
- Department of Food Science and Technology, University of California, Davis, California 95616, USA
| | - Joshua L. Cohen
- Department of Food Science and Technology, University of California, Davis, California 95616, USA
| | - Juliana Maria Leite Nobrega de Moura Bell
- Department of Food Science and Technology, University of California, Davis, California 95616, USA
- Department of Biological and Agricultural Engineering, University of California, Davis, California 95616, USA
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11
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Enhancement of ergosterol production by Saccharomyces cerevisiae in batch and fed-batch fermentation processes using n -dodecane as oxygen-vector. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2017.12.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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12
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Hydrodynamic effect of dispersed phase fraction on the mass transfer and uptake rate of hexadecane by an oil-degrading microbial consortium in an airlift bioreactor. Biochem Eng J 2018. [DOI: 10.1016/j.bej.2017.11.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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Nur Asshifa MN, Zambry NS, Salwa MS, Yahya AR. The influence of agitation on oil substrate dispersion and oxygen transfer in Pseudomonas aeruginosa USM-AR2 fermentation producing rhamnolipid in a stirred tank bioreactor. 3 Biotech 2017; 7:189. [PMID: 28664380 DOI: 10.1007/s13205-017-0828-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 04/18/2017] [Indexed: 10/19/2022] Open
Abstract
Water-immiscible substrate, diesel, was supplied as the main substrate in the fermentation of Pseudomonas aeruginosa USM-AR2 producing rhamnolipid biosurfactant, in a stirred tank bioreactor. In addition to the typical gas-aqueous system, this system includes gas-hydrocarbon-aqueous phases and the presence of surfactant (rhamnolipid) in the fermentation broth. The effect of diesel dispersion on volumetric oxygen transfer coefficient, k L a, and thus oxygen transfer, was evaluated at different agitations of 400, 500 and 600 rpm. The oxygen transfer in this oil-water-surfactant system was shown to be affected by different oil dispersion at those agitation rates. The highest diesel dispersion was obtained at 500 rpm or impeller tip speed of 1.31 m/s, compared to 400 and 600 rpm, which led to the highest k L a, growth and rhamnolipid production by P. aeruginosa USM-AR2. This showed the highest substrate mixing and homogenization at this agitation speed that led to the efficient substrate utilization by the cells. The oxygen uptake rate of P. aeruginosa USM-AR2 was 5.55 mmol/L/h, which showed that even the lowest k L a (48.21 h-1) and hence OTR (57.71 mmol/L/h) obtained at 400 rpm was sufficient to fulfill the oxygen demand of the cells. The effect of rhamnolipid concentration on k L a showed that k L a increased as rhamnolipid concentration increased to 0.6 g/L before reaching a plateau. This trend was similar for all agitation rates of 400, 500 and 600 rpm, which might be due to the increase in the resistance to oxygen transfer (k L decrease) and the increase in the specific interfacial area (a).
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Szaferski W, Mitkowski PT. Aeration of Liquid-Liquid Systems Using Various Agitators in a Mixer Equipped with a Membrane Diffuser. Chem Eng Technol 2016. [DOI: 10.1002/ceat.201500248] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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15
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Viana Marques DA, Santos-Ebinuma VC, Pessoa-Júnior A, Porto ALF, Torres BR, Converti A. Effect of aeration and agitation on extractive fermentation of clavulanic acid by using aqueous two-phase system. Biotechnol Prog 2016; 32:1444-1452. [PMID: 27451982 DOI: 10.1002/btpr.2333] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 06/15/2016] [Indexed: 11/08/2022]
Abstract
In this work, the effects of agitation and aeration rates on aqueous two-phase system (ATPS)-based extractive fermentation of clavulanic acid (CA) by Streptomyces variabilis DAUFPE 3060 were investigated through a 22 full factorial design, where oxygen transfer rate (OTR) and oxygen uptake rate (OUR) were selected as the responses. Aeration rates significantly influenced cell growth, OUR, and CA yield, while OTR was practically the same in all the runs. Under the intermediate agitation (950 rpm) and aeration conditions (3.5 vvm) of the central point runs, it was achieved OTR of 1.617 ± 0.049 mmol L-1 h-1 , OUR of 0.132 ± 0.030 mmol L-1 h-1 , maximum CA production of 434 ± 4 mg L-1 , oxygen mass transfer coefficient of 33.40 ± 2.01 s-1 , partition coefficient of 66.5 ± 1.5, CA yield in the top and bottom phases of 75% ± 2% and 19% ± 1%, respectively, mass balance of 95% ± 4% and purification factor of 3.8 ± 0.1. These results not only confirmed the paramount role of O2 supply, broth composition and operational conditions in CA ATPS-extractive fermentation, but also demonstrated the possibility of effectively using this technology as a cheap tool to simultaneously produce and recover CA. © 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:1444-1452, 2016.
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Affiliation(s)
- Daniela A Viana Marques
- Serra Talhada Campus, University of Pernambuco, Serra Talhada-PE, Brazil, Serra Talhada, PE, Brazil
| | - Valéria C Santos-Ebinuma
- Dept. of Bioprocess and Biotechnology, School of Pharmaceutical Sciences, UNESP-Univ. Estadual Paulista, Rodovia Araraquara-Jaú Km 1, Araraquara-SP, 14801-902, Brazil
| | - Adalberto Pessoa-Júnior
- Dept. of Biochemical and Pharmaceutical Technology, University of São Paulo, Av. Prof. Lineu Prestes, 580, Bloco 16, Cidade Universitária, São Paulo-SP, 05508-000, Brazil
| | - Ana L F Porto
- Dept. of Animal Morphology and Physiology, Federal Rural University of Pernambuco, Av. Dom Manoel De Medeiros, S/N, Dois Irmãos-PE, 52171-900, Brazil
| | - Beatriz Rivas Torres
- Dept. of Civil, Chemical and Environmental Engineering, Pole of Chemical Engineering, University of Genoa, via Opera Pia 15, Genoa, 16145, Italy
| | - Attilio Converti
- Dept. of Civil, Chemical and Environmental Engineering, Pole of Chemical Engineering, University of Genoa, via Opera Pia 15, Genoa, 16145, Italy
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Pinho HJO, Alves SS. Semi-Empirical Modeling of Gas–Liquid Mass Transfer in Gas–Liquid–Liquid Systems in Stirred Tanks. CHEM ENG COMMUN 2016. [DOI: 10.1080/00986445.2014.929575] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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17
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Ordaz A, López JC, Figueroa-González I, Muñoz R, Quijano G. Assessment of methane biodegradation kinetics in two-phase partitioning bioreactors by pulse respirometry. WATER RESEARCH 2014; 67:46-54. [PMID: 25261627 DOI: 10.1016/j.watres.2014.08.054] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Revised: 08/22/2014] [Accepted: 08/30/2014] [Indexed: 06/03/2023]
Abstract
Biological methane biodegradation is a promising treatment alternative when the methane produced in waste management facilities cannot be used for energy generation. Two-phase partitioning bioreactors (TPPBs), provided with a non-aqueous phase (NAP) with high affinity for the target pollutant, are particularly suitable for the treatment of poorly water-soluble compounds such as methane. Nevertheless, little is known about the influence of the presence of the NAP on the resulting biodegradation kinetics in TPPBs. In this study, an experimental framework based on the in situ pulse respirometry technique was developed to assess the impact of NAP addition on the methane biodegradation kinetics using Methylosinus sporium as a model methane-degrading microorganism. A comprehensive mass transfer characterization was performed in order to avoid mass transfer limiting scenarios and ensure a correct kinetic parameter characterization. The presence of the NAP mediated significant changes in the apparent kinetic parameters of M. sporium during methane biodegradation, with variations of 60, 120, and 150% in the maximum oxygen uptake rate, half-saturation constant and maximum specific growth rate, respectively, compared with the intrinsic kinetic parameters retrieved from a control without NAP. These significant changes in the kinetic parameters mediated by the NAP must be considered for the design, operation and modeling of TPPBs devoted to air pollution control.
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Affiliation(s)
- Alberto Ordaz
- Department of Chemical Engineering and Environmental Technology, University of Valladolid, Spain; Universidad Politécnica de Quintana Roo, Av. Tulum, Manzana 1 Lote 40, SM2, Cancún, Quintana Roo, CP 77500, Mexico
| | - Juan C López
- Department of Chemical Engineering and Environmental Technology, University of Valladolid, Spain
| | - Ivonne Figueroa-González
- Department of Chemical Engineering and Environmental Technology, University of Valladolid, Spain
| | - Raúl Muñoz
- Department of Chemical Engineering and Environmental Technology, University of Valladolid, Spain
| | - Guillermo Quijano
- Department of Chemical Engineering and Environmental Technology, University of Valladolid, Spain.
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Qi H, Zhao S, Fu H, Wen J, Jia X. Coupled cell morphology investigation and metabolomics analysis improves rapamycin production in Streptomyces hygroscopicus. Biochem Eng J 2014. [DOI: 10.1016/j.bej.2014.08.015] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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19
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Nie ZK, Ji XJ, Shang JS, Zhang AH, Ren LJ, Huang H. Arachidonic acid-rich oil production by Mortierella alpina with different gas distributors. Bioprocess Biosyst Eng 2013; 37:1127-32. [DOI: 10.1007/s00449-013-1104-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2013] [Accepted: 10/18/2013] [Indexed: 11/28/2022]
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20
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Alves SS, Pinho HJO. GAS ABSORPTION IN STIRRED GAS-LIQUID-LIQUID SYSTEMS: EFFECT OF TRANSFERRED SOLUTE SOLUBILITY AND OIL PHASE SPREADING CHARACTERISTICS. CHEM ENG COMMUN 2013. [DOI: 10.1080/00986445.2012.751377] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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21
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Muñoz R, Daugulis AJ, Hernández M, Quijano G. Recent advances in two-phase partitioning bioreactors for the treatment of volatile organic compounds. Biotechnol Adv 2012; 30:1707-20. [DOI: 10.1016/j.biotechadv.2012.08.009] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 08/24/2012] [Accepted: 08/25/2012] [Indexed: 12/01/2022]
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22
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Nigam A, Phale PS, Wangikar PP. Assessment of the metabolic capacity and adaptability of aromatic hydrocarbon degrading strain Pseudomonas putida CSV86 in aerobic chemostat culture. BIORESOURCE TECHNOLOGY 2012; 114:484-491. [PMID: 22494573 DOI: 10.1016/j.biortech.2012.03.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2011] [Revised: 03/02/2012] [Accepted: 03/02/2012] [Indexed: 05/31/2023]
Abstract
Pseudomonas putida CSV86 utilizes aromatic compounds preferentially over sugars and co-metabolizes aromatics along with organic acids. In the present study, the metabolic capacity and adaptability of strain CSV86 were assessed in a chemostat at benzyl alcohol concentrations ranging from 1 g l(-1) to 3 g l(-1) and in the presence of glucose and succinate by systematically varying the dilution rate. Complete removal of benzyl alcohol was achieved for loadings up to 640 mg l(-1) h(-1) in presence of benzyl alcohol alone. The strain responded within 1 min towards step changes in substrate loading as indicated by an increase in the oxygen uptake rate, presumably as a result of excess metabolic capacity. These results suggest that CSV86 exhibits considerable metabolic elasticity upon increase in substrate load. Metabolic elasticity of the microorganism is an important parameter in wastewater treatment plants due to the changing substrate loads.
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Affiliation(s)
- Anshul Nigam
- Department of Biosciences and Bioengineering, Indian Institute of Technology Bombay, Powai, Mumbai 400 076, India
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Biosynthesis of high molecular weight hyaluronic acid by Streptococcus zooepidemicus using oxygen vector and optimum impeller tip speed. J Biosci Bioeng 2012; 114:286-91. [PMID: 22608992 DOI: 10.1016/j.jbiosc.2012.04.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 04/16/2012] [Accepted: 04/17/2012] [Indexed: 12/17/2022]
Abstract
The potential use of n-dodecane and n-hexadecane as oxygen vectors for enhancing hyaluronic acid (HA) biosynthesis by Streptococcus zooepidemicus ATCC 39920 was investigated using a 2-L stirred-tank bioreactor equipped with helical ribbon or Rushton turbine impellers. The volumetric fraction of the oxygen vector influenced the gas-liquid volumetric oxygen transfer coefficient (K(L)a) positively. Batch HA fermentation with 1% (v/v) n-dodecane or 0.5% (v/v) n-hexadecane addition was carried out at different impeller tip speeds. Even though cell growth was lower in the fermentation with oxygen vector addition, the HA productivity and molecular weight were higher when compared to the fermentation without oxygen vector at low impeller tip speed. The highest HA concentration (4.25 gHA/l) and molecular weight (1.54 × 10(7) Da) were obtained when 0.5% (v/v) n-hexadecane and 0.785 m/s impeller tip speed of helical ribbon were used.
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Ütkür FO, Thanh Tran T, Collins J, Brandenbusch C, Sadowski G, Schmid A, Bühler B. Integrated organic-aqueous biocatalysis and product recovery for quinaldine hydroxylation catalyzed by living recombinant Pseudomonas putida. J Ind Microbiol Biotechnol 2012; 39:1049-59. [PMID: 22383177 DOI: 10.1007/s10295-012-1106-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Accepted: 02/07/2012] [Indexed: 11/29/2022]
Abstract
In an earlier study, biocatalytic carbon oxyfunctionalization with water serving as oxygen donor, e.g., the bioconversion of quinaldine to 4-hydroxyquinaldine, was successfully achieved using resting cells of recombinant Pseudomonas putida, containing the molybdenum-enzyme quinaldine 4-oxidase, in a two-liquid phase (2LP) system (Ütkür et al. J Ind Microbiol Biotechnol 38:1067-1077, 2011). In the study reported here, key parameters determining process performance were investigated and an efficient and easy method for product recovery was established. The performance of the whole-cell biocatalyst was shown not to be limited by the availability of the inducer benzoate (also serving as growth substrate) during the growth of recombinant P. putida cells. Furthermore, catalyst performance during 2LP biotransformations was not limited by the availability of glucose, the energy source to maintain metabolic activity in resting cells, and molecular oxygen, a possible final electron acceptor during quinaldine oxidation. The product and the organic solvent (1-dodecanol) were identified as the most critical factors affecting biocatalyst performance, to a large extent on the enzyme level (inhibition), whereas substrate effects were negligible. However, none of the 13 alternative solvents tested surpassed 1-dodecanol in terms of toxicity, substrate/product solubility, and partitioning. The use of supercritical carbon dioxide for phase separation and an easy and efficient liquid-liquid extraction step enabled 4-hydroxyquinaldine to be isolated at a purity of >99.9% with recoveries of 57 and 84%, respectively. This study constitutes the first proof of concept on an integrated process for the oxyfunctionalization of toxic substrates with a water-incorporating hydroxylase.
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Affiliation(s)
- F Ozde Ütkür
- Laboratory of Chemical Biotechnology, Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Str. 66, 44227, Dortmund, Germany
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Ghribi D, Ellouze-Chaabouni S. Enhancement of Bacillus subtilis Lipopeptide Biosurfactants Production through Optimization of Medium Composition and Adequate Control of Aeration. BIOTECHNOLOGY RESEARCH INTERNATIONAL 2011; 2011:653654. [PMID: 21966596 PMCID: PMC3182341 DOI: 10.4061/2011/653654] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Revised: 07/26/2011] [Accepted: 07/29/2011] [Indexed: 11/20/2022]
Abstract
Interest in biosurfactants has increased considerably in recent years, as they are potentially used in many commercial applications in petroleum, pharmaceuticals, biomedical, and food processing industries. Since improvement of their production was of great importance to reduce the final coast, cultural conditions were analyzed to optimize biosurfactants production from Bacillus subtilis SPB1 strain. A high yield of biosurfactants was obtained from a culture of B. subtilis using carbohydrate substrate as a carbon source; among carbohydrates, glucose enhanced the best surfactin production. The optimum glucose concentration was 40 g/L. Higher amount of biosurfactants was obtained using 5 g/L of urea as organic nitrogen source and applying C/N ratio of 7 with ammonium chloride as inorganic nitrogen source. The highest amount of biosurfactants was recorded with the addition of 2% kerosene. Moreover, it was shown, using an automated full-controlled 2.6 L fermenter, that aeration of the medium, which affected strongly the growth regulated biosurfactants synthesis by the producing cell. So that, low or high aerations lead to a decrease of biosurfactants synthesis yields. It was found that when using dissolved oxygen saturation of the medium at 30%, biosurfactants production reached 4.92 g/L.
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Affiliation(s)
- Dhouha Ghribi
- Départment de Biotechnolgie, Institut Supérieur de Biotechnologie de Sfax, B.P. 261, Sfax 3038, Tunisia
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Borovkova IS, Vol’khin VV, Kazakov DA. Intensification of the biocatalytic oxidation of phenol with the use of activators of interface oxygen transfer. CATALYSIS IN INDUSTRY 2011. [DOI: 10.1134/s2070050411030020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Viana Marques DA, Pessoa-Júnior A, Lima-Filho JL, Converti A, Perego P, Porto ALF. Extractive fermentation of clavulanic acid by Streptomyces DAUFPE 3060 using aqueous two-phase system. Biotechnol Prog 2010; 27:95-103. [DOI: 10.1002/btpr.526] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2010] [Revised: 09/08/2010] [Indexed: 11/08/2022]
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Garcia-Ochoa F, Gomez E, Santos VE, Merchuk JC. Oxygen uptake rate in microbial processes: An overview. Biochem Eng J 2010. [DOI: 10.1016/j.bej.2010.01.011] [Citation(s) in RCA: 183] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Correia L, Aldrich C, Clarke K. Interfacial gas–liquid transfer area in alkane–aqueous dispersions and its impact on the overall volumetric oxygen transfer coefficient. Biochem Eng J 2010. [DOI: 10.1016/j.bej.2009.12.007] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Marques DDAV, Torres BR, Porto ALF, Pessoa-Júnior A, Converti A. Comparison of oxygen mass transfer coefficient in simple and extractive fermentation systems. Biochem Eng J 2009. [DOI: 10.1016/j.bej.2009.07.015] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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31
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Littlejohns JV, Daugulis AJ. Oxygen mass transfer and hydrodynamics in a multi-phase airlift bioscrubber system. Chem Eng Sci 2009. [DOI: 10.1016/j.ces.2009.06.058] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Quijano G, Hernandez M, Thalasso F, Muñoz R, Villaverde S. Two-phase partitioning bioreactors in environmental biotechnology. Appl Microbiol Biotechnol 2009; 84:829-46. [DOI: 10.1007/s00253-009-2158-6] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2009] [Revised: 07/17/2009] [Accepted: 07/18/2009] [Indexed: 11/28/2022]
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Garcia-Ochoa F, Gomez E. Bioreactor scale-up and oxygen transfer rate in microbial processes: an overview. Biotechnol Adv 2008; 27:153-76. [PMID: 19041387 DOI: 10.1016/j.biotechadv.2008.10.006] [Citation(s) in RCA: 709] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2008] [Revised: 10/18/2008] [Accepted: 10/26/2008] [Indexed: 11/16/2022]
Abstract
In aerobic bioprocesses, oxygen is a key substrate; due to its low solubility in broths (aqueous solutions), a continuous supply is needed. The oxygen transfer rate (OTR) must be known, and if possible predicted to achieve an optimum design operation and scale-up of bioreactors. Many studies have been conducted to enhance the efficiency of oxygen transfer. The dissolved oxygen concentration in a suspension of aerobic microorganisms depends on the rate of oxygen transfer from the gas phase to the liquid, on the rate at which oxygen is transported into the cells (where it is consumed), and on the oxygen uptake rate (OUR) by the microorganism for growth, maintenance and production. The gas-liquid mass transfer in a bioprocess is strongly influenced by the hydrodynamic conditions in the bioreactors. These conditions are known to be a function of energy dissipation that depends on the operational conditions, the physicochemical properties of the culture, the geometrical parameters of the bioreactor and also on the presence of oxygen consuming cells. Stirred tank and bubble column (of various types) bioreactors are widely used in a large variety of bioprocesses (such as aerobic fermentation and biological wastewater treatments, among others). Stirred tanks bioreactors provide high values of mass and heat transfer rates and excellent mixing. In these systems, a high number of variables affect the mass transfer and mixing, but the most important among them are stirrer speed, type and number of stirrers and gas flow rate used. In bubble columns and airlifts, the low-shear environment compared to the stirred tanks has enabled successful cultivation of shear sensitive and filamentous cells. Oxygen transfer is often the rate-limiting step in the aerobic bioprocess due to the low solubility of oxygen in the medium. The correct measurement and/or prediction of the volumetric mass transfer coefficient, (k(L)a), is a crucial step in the design, operation and scale-up of bioreactors. The present work is aimed at the reviewing of the oxygen transfer rate (OTR) in bioprocesses to provide a better knowledge about the selection, design, scale-up and development of bioreactors. First, the most used measuring methods are revised; then the main empirical equations, including those using dimensionless numbers, are considered. The possible increasing on OTR due to the oxygen consumption by the cells is taken into account through the use of the biological enhancement factor. Theoretical predictions of both the volumetric mass transfer coefficient and the enhancement factor that have been recently proposed are described; finally, different criteria for bioreactor scale-up are considered in the light of the influence of OTR and OUR affecting the dissolved oxygen concentration in real bioprocess.
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Affiliation(s)
- Felix Garcia-Ochoa
- Dept. Ingeniería Química. Facultad Químicas, Universidad Complutense, 28040-Madrid, Spain.
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Clarke K, Correia L. Oxygen transfer in hydrocarbon–aqueous dispersions and its applicability to alkane bioprocesses: A review. Biochem Eng J 2008. [DOI: 10.1016/j.bej.2007.11.020] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Amaral PFF, Freire MG, Rocha-Leão MHM, Marrucho IM, Coutinho JAP, Coelho MAZ. Optimization of oxygen mass transfer in a multiphase bioreactor with perfluorodecalin as a second liquid phase. Biotechnol Bioeng 2007; 99:588-98. [PMID: 17787007 DOI: 10.1002/bit.21640] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Oxygenation is an important parameter involved in the design and operation of mixing-sparging bioreactors and it can be analyzed by means of the oxygen mass transfer coefficient (k(L)a). The operational conditions of a stirred, submerged aerated 2-L bioreactor have been optimized by studying the influence of a second liquid phase with higher oxygen affinity (perfluorodecalin or olive oil) in the k(L)a. Using k(L)a measurements, the influence of the following parameters on the oxygen transfer rate was evaluated: the volume of working medium, the type of impellers and their position, the organic phase concentration, the aqueous phase composition, and the concentration of inactive biomass. This study shows that the best experimental conditions were achieved with a perfluorodecalin volume fraction of 0.20, mixing using two Rushton turbines with six vertical blades and in the presence of YPD medium as the aqueous phase, with a k(L)a value of 64.6 h(-1). The addition of 20% of perfluorodecalin in these conditions provided a k(L)a enhancement of 25% when pure water was the aqueous phase and a 230% enhancement when YPD medium was used in comparison to their respective controls (no perfluorodecalin). Furthermore it is shown that the presence of olive oil as a second liquid phase is not beneficial to the oxygen transfer rate enhancement, leading to a decrease in the k(L)a values for all the concentrations studied. It was also observed that the magnitude of the enhancement of the k(L)a values by perfluorodecalin depends on the biomass concentration present.
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Affiliation(s)
- Priscilla F F Amaral
- Departamento de Engenharia Bioquímica, Escola de Química/UFRJ, Centro de Tecnologia, Bl.E, lab.113, Rio de Janeiro, RJ 21949-900, Brazil
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