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Silva TP, Paixão SM, Tavares J, Paradela F, Crujeira T, Roseiro JC, Alves L. Streamlining the biodesulfurization process: development of an integrated continuous system prototype using Gordonia alkanivorans strain 1B. RSC Adv 2024; 14:725-742. [PMID: 38173596 PMCID: PMC10758933 DOI: 10.1039/d3ra07405f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 12/14/2023] [Indexed: 01/05/2024] Open
Abstract
Biodesulfurization is a biotechnological process that uses microorganisms as biocatalysts to actively remove sulfur from fuels. It has the potential to be cleaner and more efficient than the current industrial process, however several bottlenecks have prevented its implementation. Additionally, most works propose models based on direct cultivation on fuel, or batch production of biocatalysts followed by a processing step before application to batch biodesulfurization, which are difficult to replicate at a larger scale. Thus, there is a need for a model that can be adapted to a refining process, where fuel is being continuously produced to meet consumer needs. The main goal of this work was to develop the first bench-scale continuous biodesulfurization system that integrates biocatalyst production, biodesulfurization and fuel separation, into a single continuous process, taking advantage of the method for the continuous production of the biodesulfurization biocatalysts previously established. This system eliminates the need to process the biocatalysts and facilitates fuel separation, while mitigating some of the process bottlenecks. First, using the bacterium Gordonia alkanivorans strain 1B, continuous culture conditions were optimized to double biocatalyst production, and the produced biocatalysts were applied in batch biphasic biodesulfurization assays for a better understanding of the influence of different factors. Then, the novel integrated system was developed and evaluated using a model fuel (n-heptane + dibenzothiophene) in continuous biodesulfurization assays. With this system strain 1B surpassed its highest biodesulfurization rate, reaching 21 μmol h-1 g-1. Furthermore, by testing a recalcitrant model fuel, composed of n-heptane with dibenzothiophene and three alkylated derivatives (with 109 ppm of sulfur), 72% biodesulfurization was achieved by repeatedly passing the same fuel through the system, maintaining a constant response throughout sequential biodesulfurization cycles. Lastly, the system was also tested with real fuels (used tire/plastic pyrolysis oil; sweet and sour crude oils), revealing increased desulfurization activity. These results highlight the potential of the continuous biodesulfurization system to accelerate the transition from bench to commercial scale, contributing to the development of biodesulfurization biorefineries, centered on the valorization of sulfur-rich residues/biomasses for energy production.
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Affiliation(s)
- Tiago P Silva
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias Estrada do Paço do Lumiar, 22 1649-038 Portugal
| | - Susana M Paixão
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias Estrada do Paço do Lumiar, 22 1649-038 Portugal
| | - João Tavares
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias Estrada do Paço do Lumiar, 22 1649-038 Portugal
| | - Filipe Paradela
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias Estrada do Paço do Lumiar, 22 1649-038 Portugal
| | - Teresa Crujeira
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias Estrada do Paço do Lumiar, 22 1649-038 Portugal
| | - José C Roseiro
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias Estrada do Paço do Lumiar, 22 1649-038 Portugal
| | - Luís Alves
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias Estrada do Paço do Lumiar, 22 1649-038 Portugal
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A New Biosurfactant/Bioemulsifier from Gordonia alkanivorans Strain 1B: Production and Characterization. Processes (Basel) 2022. [DOI: 10.3390/pr10050845] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Biosurfactants and bioemulsifiers (BS/BE) are naturally synthesized molecules, which can be used as alternatives to traditional detergents. These molecules are commonly produced by microorganisms isolated from hydrocarbon-rich environments. Gordonia alkanivorans strain 1B was originally found in such an environment, however little was known about its abilities as a BS/BE producer. The goal of this work was to access the potential of strain 1B as a BS/BE producer and perform the initial characterization of the produced compounds. It was demonstrated that strain 1B was able to synthesize lipoglycoprotein compounds with BS/BE properties, both extracellularly and adhered to the cells, without the need for a hydrophobic inducer, producing emulsion in several different hydrophobic phases. Using a crude BS/BE powder, the critical micelle concentration was determined (CMC = 16.94 mg/L), and its capacity to reduce the surface tension to a minimum of 35.63 mN/m was demonstrated, surpassing many commercial surfactants. Moreover, after dialysis, emulsification assays revealed an activity similar to that of Triton X-100 in almond and sunflower oils. In benzene, the E24 value attained was 83.45%, which is 30% greater than that of the commercial alternative. The results obtained highlight for the presence of promising novel BS/BE produced by strain 1B.
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Tavares J, Alves L, Silva TP, Paixão SM. Design and validation of an expeditious analytical method to quantify the emulsifying activity during biosurfactants/bioemulsifiers production. Colloids Surf B Biointerfaces 2021; 208:112111. [PMID: 34560442 DOI: 10.1016/j.colsurfb.2021.112111] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 10/20/2022]
Abstract
Biosurfactants (BS) and bioemulsifiers (BE) are amphiphilic molecules that are produced by a wide range of microorganisms. Although the chemical composition of BS and BE is different, both BS/BE have recognized emulsifying properties, which are the focus of this study. Herein, a rapid and simple analytical method to quantify the emulsifying activity (EA) of a product produced by the actinomycete Gordonia alkanivorans strain 1B (BS/BE), which exhibits emulsifying properties, was developed. The analytical approach was based on the ability of a BS/BE solution to form a stable emulsion when mixed with n-heptane. So, using 4 mL screw cap glass tubes (10 × 75 mm, ND10 caps with PTFE septum), the EA was assessed by adding 1 mL of n-heptane to 1 mL of an aqueous solution containing the test product, mix by vortexing at high speed (2 min) and place the tube in an upright stable position for 10 min before analyzing. A set of emulsification tests with increasing volumes of test product solutions was carried out until 100% emulsion was obtained in the organic phase. One emulsification unit was defined as the minimum volume of product (Volmin of emulsifier/surfactant, up to 1 mL) needed to form and maintain 100% emulsion in the organic phase. The corresponding emulsifying activity value is presented in U/mL, and it is calculated as: EA (product) = 1 U/Volmin (mL). Further validation by testing several synthetic surfactants and industrial/domestic dishwashing detergents, in parallel with the bacterial crude BS/BE, towards emulsifying activity determination (U/mL) was performed demonstrating the wide range of the method applicability. Moreover, the specific emulsifying activity for each product tested was estimated though correlation analysis (linear regression) between volumetric emulsifying activity (U/mL) and product concentration (g/L). Indeed, this new analytical approach to quantify the emulsifying activity is accurate and reproducible, and consequently it can be a promising tool to apply in screening/monitorization studies on BS/BE production enabling reliable comparisons.
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Affiliation(s)
- João Tavares
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias, Estrada do Paço do Lumiar, 22, 1649-038, Lisboa, Portugal
| | - Luís Alves
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias, Estrada do Paço do Lumiar, 22, 1649-038, Lisboa, Portugal.
| | - Tiago P Silva
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias, Estrada do Paço do Lumiar, 22, 1649-038, Lisboa, Portugal
| | - Susana M Paixão
- LNEG - Laboratório Nacional de Energia e Geologia, IP, Unidade de Bioenergia e Biorrefinarias, Estrada do Paço do Lumiar, 22, 1649-038, Lisboa, Portugal.
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Zhang Y, Song Y, Chen YJ, Chen Y, Lu Y, Li R, Dong C, Hu D, Cai Z. Discovery of emerging sulfur-containing PAHs in PM 2.5: Contamination profiles and potential health risks. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:125795. [PMID: 33836324 DOI: 10.1016/j.jhazmat.2021.125795] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Revised: 03/21/2021] [Accepted: 03/27/2021] [Indexed: 06/12/2023]
Abstract
We reported the discovery and identification of emerging sulfur-containing polycyclic aromatic hydrocarbons, namely polycyclic aromatic sulfur heterocycles (PASHs), in PM2.5 collected from two typical regions of China, Taiyuan and Guangzhou. Until now, there is no research on contamination status, sources and potential health risks of this unexpected group of organic contaminants in PM2.5. High atmospheric concentrations (ngm-3) and significant time-dependent variations were determined in PM2.5 of Taiyuan from 2017 to 2018. Coal combustion/secondary formation and traffic emission/secondary formation were apportioned as possible pollution sources for the PM2.5-bound PASHs in Taiyuan and Guangzhou, respectively. Dithiothreitol and cell viability assays were applied for evaluations of PASH-induced reactive oxygen species (ROS) production and cell toxicity based on the determined real exposure levels for adults. The results illustrated that PASHs in PM2.5 possibly caused oxidative stress and inhibition of human bronchial epithelial cells in seriously polluted regions such as Taiyuan, suggesting that the pollutant-induced health concerns may need more investigations. This study provides new insights into PM2.5 pollution, and is beneficial for the development of effective contamination control strategies and reduction of risks on public health.
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Affiliation(s)
- Yanhao Zhang
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Yuanyuan Song
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Yi-Jie Chen
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China; Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Yanyan Chen
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Yan Lu
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Ruijin Li
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
| | - Chuan Dong
- Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
| | - Di Hu
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China
| | - Zongwei Cai
- State Key Laboratory of Environmental and Biological Analysis, Department of Chemistry, Hong Kong Baptist University, Hong Kong, China; Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
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Jumina, Kurniawan YS, Purwono B, Siswanta D, Priastomo Y, Winarno A, Waluyo J. Science and Technology Progress on the Desulfurization Process of Crude Oil. B KOREAN CHEM SOC 2021. [DOI: 10.1002/bkcs.12342] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Jumina
- Department of Chemistry, Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada Sekip Utara Sekip Utara Yogyakarta 55281 Indonesia
| | - Yehezkiel Steven Kurniawan
- Department of Chemistry, Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada Sekip Utara Sekip Utara Yogyakarta 55281 Indonesia
- Ma Chung Research Center for Photosynthetic Pigments Universitas Ma Chung Villa Puncak Tidar N 01 Malang 65151 Indonesia
| | - Bambang Purwono
- Department of Chemistry, Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada Sekip Utara Sekip Utara Yogyakarta 55281 Indonesia
| | - Dwi Siswanta
- Department of Chemistry, Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada Sekip Utara Sekip Utara Yogyakarta 55281 Indonesia
| | - Yoga Priastomo
- Department of Chemistry, Faculty of Mathematics and Natural Sciences Universitas Gadjah Mada Sekip Utara Sekip Utara Yogyakarta 55281 Indonesia
| | - Agustinus Winarno
- Department of Mechanical Engineering, Vocational College Universitas Gadjah Mada Sekip Utara Yogyakarta 55281 Indonesia
| | - Joko Waluyo
- Department of Mechanical and Industrial Engineering, Faculty of Engineering Universitas Gadjah Mada Jl. Grafika No 2 UGM Campus Yogyakarta 55281 Indonesia
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6
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Zhang Y, Chen YJ, Song Y, Dong C, Cai Z. Atmospheric pressure gas chromatography-tandem mass spectrometry analysis of fourteen emerging polycyclic aromatic sulfur heterocycles in PM2.5. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.07.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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7
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Yi Z, Ma X, Song J, Yang X, Tang Q. Investigations in enhancement biodesulfurization of model compounds by ultrasound pre-oxidation. ULTRASONICS SONOCHEMISTRY 2019; 54:110-120. [PMID: 30827908 DOI: 10.1016/j.ultsonch.2019.02.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 01/21/2019] [Accepted: 02/11/2019] [Indexed: 06/09/2023]
Abstract
In this study, complicated model sulfur compounds in crude oil were biodesulfurized in a batch process by microbial consortium enriched from oil contaminated soil. Dibenzothiophene (DBT) was selected as model sulfur compounds. Ultrasonic radiation was used to pre-oxidize the model sulfur compounds before the biodesulfurization (BDS) process. The enhancement mechanism of ultrasound pre-oxidation (UPO) on the biodesulfurization of DBT was investigated. The effects of initial conditions on the biodesulfurization of DBT in UPO/BDS system such as solution initial pH, DBT initial concentration, sulfur source, biocatalyst initial concentration, and incubation temperature were discussed. The results show that the application of UPO before BDS procedure significantly improved the efficiency of the biodesulfurization and allowed sulfur removal in shorter time through oxidizing DBT to DBT sulfone, resulting in shortening the "4S" pathway for biodesulfurization from 4 steps to 2 steps, enhancement in reaction velocity and enzyme-substrate affinity as well as reduction in substrate inhibition. The concentration of 2-HBP increased fast with the use of ultrasound pre-oxidation, which was dependent on solution initial pH, DBT initial concentration, sulfur source, biocatalyst initial concentration, and incubation temperature.
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Affiliation(s)
- Zhigang Yi
- Department of Chemistry, Leshan Normal University, Leshan 614004, PR China
| | - Xuguang Ma
- Department of Chemistry, Leshan Normal University, Leshan 614004, PR China
| | - Jiuhua Song
- Department of Chemistry, Leshan Normal University, Leshan 614004, PR China
| | - Xiaorong Yang
- Department of Chemistry, Leshan Normal University, Leshan 614004, PR China
| | - Qiong Tang
- Department of Chemistry, Leshan Normal University, Leshan 614004, PR China.
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Sowani H, Kulkarni M, Zinjarde S. Harnessing the catabolic versatility of Gordonia species for detoxifying pollutants. Biotechnol Adv 2019; 37:382-402. [DOI: 10.1016/j.biotechadv.2019.02.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 01/12/2019] [Accepted: 02/11/2019] [Indexed: 11/26/2022]
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Pacheco M, Paixão SM, Silva TP, Alves L. On the road to cost-effective fossil fuel desulfurization byGordonia alkanivoransstrain 1B. RSC Adv 2019; 9:25405-25413. [PMID: 35530089 PMCID: PMC9070030 DOI: 10.1039/c9ra03601f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 08/07/2019] [Indexed: 11/21/2022] Open
Abstract
Biodesulfurization (BDS) is an ecofriendly process that uses microorganisms to efficiently remove sulfur from fossil fuels. To make the BDS process economically competitive with the deep hydrodesulfurization process, which is currently used in the oil industry, it is necessary to improve several factors. One crucial limitation to be overcome, common within many other biotechnological processes, is the cost of the culture medium. Therefore, an important line of work to make BDS scale-up less costly is the optimization of the culture medium composition aiming to reduce operating expenses and maximize biocatalyst production. In this context, the main goal of this study was on the minimization of inorganic key components of sulfur-free mineral (SFM) medium in order to get the maximal production of efficient desulfurizing biocatalysts. Hence, a set of assays was carried out to develop an optimal culture medium containing minimal amounts of nitrogen (N) and magnesium (Mg) sources and trace elements solution (TES). These assays allowed the design of a SFMM (SFM minimum) medium containing 85% N-source, 25% Mg-source and 25% TES. Further validation consisted of testing this minimized medium using two carbon sources: the commercial C-source (glucose + fructose) versus Jerusalem artichoke juice (JAJ) as a cheaper alternative. SFMM medium allowed microbial cells to almost duplicate their specific desulfurization rate (q2-HBP) for both tested C-sources, namely from 2.15 to 3.39 μmoL g−1 (DCW) h−1 for Fru + Glu and from 1.91 to 3.58 μmoL g−1 (DCW) h−1 for JAJ, achieving a similar net 2-hydroxybiphenyl produced per g of consumed sugar (∼17 μmoL g−1). These results point out the great advantage of using cheaper culture medium that in addition enhances the bioprocess effectiveness, paving the way to a sustainable scale-up for fossil fuel BDS. The utilization of desulfurizing microorganisms that can grow in low nutrient culture media without vitamins and other growth promoters (e.g. yeast extract, peptone) is an advantage for BDS upgrade since it may reduce the biocatalyst production costs significantly![]()
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Affiliation(s)
- Marta Pacheco
- LNEG – Instituto Nacional de Energia e Geologia
- IP
- Unidade de Bioenergia
- Portugal
| | - Susana M. Paixão
- LNEG – Instituto Nacional de Energia e Geologia
- IP
- Unidade de Bioenergia
- Portugal
| | - Tiago P. Silva
- LNEG – Instituto Nacional de Energia e Geologia
- IP
- Unidade de Bioenergia
- Portugal
| | - Luís Alves
- LNEG – Instituto Nacional de Energia e Geologia
- IP
- Unidade de Bioenergia
- Portugal
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Dinamarca MA, Eyzaguirre J, Baeza P, Aballay P, Canales C, Ojeda J. A new functional biofilm biocatalyst for the simultaneous removal of dibenzothiophene and quinoline using Rhodococcus rhodochrous and curli amyloid overproducer mutants derived from Cobetia sp. strain MM1IDA2H-1. BIOTECHNOLOGY REPORTS (AMSTERDAM, NETHERLANDS) 2018; 20:e00286. [PMID: 30386734 PMCID: PMC6205334 DOI: 10.1016/j.btre.2018.e00286] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 10/05/2018] [Accepted: 10/05/2018] [Indexed: 12/13/2022]
Abstract
Biocatalyst systems based on biofilms were developed to remove nitrogen and sulfur-containing heterocyclic hydrocarbons using Cobetia sp. strain MM1IDA2H-1 and Rhodococcus rhodochrous. The curli overproducers mutants CM1 and CM4 were derived from Cobetia sp. strain and used to build monostrain biofilms to remove quinoline; and together with R. rhodochrous to simultaneously remove quinoline and dibenzothiophene using mixed biofilms. The quinoline removal using biofilms were 96% and 97% using CM1 or CM4 curli overproducers respectively, whereas bacterial suspensions assays yielded 19% and 24% with the same strains. At the other hand, the simultaneous removal of quinoline and dibenzothiophene using mixed biofilms were respectively 50% and 58% using strains R. rhodochrous with CM1 and 75% and 50% using R. rhodochrous with CM4. Results show that biofilms were more efficient than bacterial suspension assays and that in mixed biofilms the shared surface area by two or more bacteria could affect the final yield.
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Affiliation(s)
- M Alejandro Dinamarca
- Centro de Microbio-Innovación (CMBi) Universidad de Valparaíso, Casilla, 5001, Valparaíso, Chile
| | - Johana Eyzaguirre
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso Casilla 4059, Valparaíso, Chile
| | - Patricio Baeza
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso Casilla 4059, Valparaíso, Chile
| | - Paulina Aballay
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso Casilla 4059, Valparaíso, Chile
| | - Christian Canales
- Laboratorio de Ingeniería en Biotecnología, Facultad de Ingeniería y Tecnología, Universidad San Sebastián, Campus Las Tres Pascualas, Concepción, Lientur, 1457, Chile
| | - Juan Ojeda
- Escuela de Nutrición, Facultad de Farmacia, Universidad de Valparaíso, Casilla, 5001, Valparaíso, Chile
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Abstract
Since the sulfur specific cleavage is vital for the organic sulfur removal from fossil fuel, we explored potential bacterial strains of MTCC (Microbial Type Culture Collection) to desulfurize the Dibenzothiophene (DBT) through C-S bond cleavage (4-S pathway). MTCC strains Rhodococcus rhodochrous (3552), Arthrobacter sulfureus (3332), Gordonia rubropertincta (289), and Rhodococcus erythropolis (3951) capable of growing in 0.5 mM DBT were examined for their desulfurization ability. The presence of dsz genes as well as the metabolites was screened by polymerase chain reaction (PCR) and HPLC, respectively. All these strains showed > 99% DBT desulfurization with 10 days of incubation in minimal salt medium. From the HPLC analysis it was further revealed that these MTCC strains show differences in the end metabolites and desulfurize DBT differently following a variation in the regular 4-S pathway. These findings are also well corroborating with their respective organization of dszABC operons and their relative abundance. The above MTCC strains are capable of desulfurizing DBT efficiently and hence can be explored for biodesulfurization of petrochemicals and coal with an eco-friendly and energy economical process.
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Kilbane JJ. Biodesulfurization: How to Make it Work? ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2016. [DOI: 10.1007/s13369-016-2269-1] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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13
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Feng S, Yang H, Zhan X, Wang W. Enhancement of dibenzothiophene biodesulfurization by weakening the feedback inhibition effects based on a systematic understanding of the biodesulfurization mechanism by Gordonia sp. through the potential “4S” pathway. RSC Adv 2016. [DOI: 10.1039/c6ra14459d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Gordonia sp. JDZX13 (source: industrial petroleum soil) shows good potential for dibenzothiophene (DBT) biodesulfurization.
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Affiliation(s)
- Shoushuai Feng
- The Key Laboratory of Industrial Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi
| | - Hailin Yang
- The Key Laboratory of Industrial Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi
| | - Xiao Zhan
- The Key Laboratory of Industrial Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi
| | - Wu Wang
- The Key Laboratory of Industrial Biotechnology
- Ministry of Education
- School of Biotechnology
- Jiangnan University
- Wuxi
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14
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Silva TP, Paixão SM, Alves L. Ability of Gordonia alkanivorans strain 1B for high added value carotenoids production. RSC Adv 2016. [DOI: 10.1039/c6ra08126f] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
Currently, carotenoids are valuable bioactive molecules for several industries, such as chemical, pharmaceutical, food and cosmetics, due to their multiple benefits as natural colorants, antioxidants and vitamin precursors.
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Affiliation(s)
- Tiago P. Silva
- LNEG – Laboratório Nacional de Energia e Geologia, IP
- Unidade de Bioenergia
- 1649-038 Lisboa
- Portugal
| | - Susana M. Paixão
- LNEG – Laboratório Nacional de Energia e Geologia, IP
- Unidade de Bioenergia
- 1649-038 Lisboa
- Portugal
| | - Luís Alves
- LNEG – Laboratório Nacional de Energia e Geologia, IP
- Unidade de Bioenergia
- 1649-038 Lisboa
- Portugal
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15
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Teixeira AV, Paixão SM, da Silva TL, Alves L. Influence of the Carbon Source on Gordonia alkanivorans Strain 1B Resistance to 2-Hydroxybiphenyl Toxicity. Appl Biochem Biotechnol 2014; 173:870-82. [DOI: 10.1007/s12010-014-0902-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Accepted: 04/02/2014] [Indexed: 11/27/2022]
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16
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Alves L, Paixão SM. Fructophilic behaviour of Gordonia alkanivorans strain 1B during dibenzothiophene desulfurization process. N Biotechnol 2013; 31:73-9. [PMID: 24012483 DOI: 10.1016/j.nbt.2013.08.007] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Revised: 08/15/2013] [Accepted: 08/22/2013] [Indexed: 01/23/2023]
Abstract
Biodesulfurization (BDS) aims at the removal of recalcitrant sulfur from fossil fuels at mild operating conditions with the aid of microorganisms. These microorganisms can remove sulfur from dibenzothiphene (DBT), a model compound, or other polycyclic aromatic used as sulfur source, making BDS an easy and environmental friendly process. Gordonia alkanivorans strain 1B has been described as a desulfurizing bacterium, able to desulfurize DBT to 2-hydroxybiphenyl (2-HBP), the final product of the 4S pathway, using d-glucose as carbon source. However, both cell growth and desulfurization can be largely affected by the nutrient composition of the growth medium, due to cofactor requirements of many enzymes involved in the BDS biochemical pathway. In this study, the main goal was to investigate the influence of several sugars, as carbon source, on the growth and DBT desulfurization ability of G. alkanivorans strain 1B. The results of desulfurization tests showed that the lowest values for the growth rate (0.025 hour(-1)) and for the overall 2-HBP production rate (1.80 μm/hour) by the strain 1B were obtained in glucose grown cultures. When using sucrose, the growth rate increase exhibited by strain 1B led to a higher biomass productivity, which induced a slightly increase in the 2-HBP production rate (1.91 μm/hour), conversely in terms of 2-HBP specific production rate (q2-HBP) the value obtained was markedly lower (0.718 μmol/g/hour in sucrose versus 1.22 μmol/g/hour in glucose). When a mixture of glucose and fructose was used as carbon source, strain 1B reached a value of q2-HBP=1.90 μmol/g/hour, close to that in fructose (q2-HBP=2.12 μmol/g/hour). The highest values for both cell growth (μ=0.091 hour(-1)) and 2-HPB production (9.29μm/hour) were obtained when strain 1B was desulfurizing DBT in the presence of fructose as the only carbon source, indicating a fructophilic behaviour by this bacterium. This fact is in agreement with the highest value of biomass productivity by strain 1B be in fructose, which resulted in a higher amount cells fulfilling the DBT-desulfurization. The greater number of functional cells conducted to a more effectiveness BDS process by strain 1B, as they attained a q2-HBP about 74% higher than in glucose grown cultures. Moreover, this significant BDS enhancement can better be observed in terms of the overall 2-HBP production rate, which increased over 5-fold, from 1.80 μm/hour (in glucose) to 9.29 μm/hour (in fructose).
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Affiliation(s)
- Luís Alves
- LNEG - Instituto Nacional de Energia e Geologia, IP, Unidade de Bioenergia, Estrada do Paço do Lumiar, 22, 1649-038 Lisboa, Portugal.
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Czechowska K, Reimmann C, van der Meer JR. Characterization of a MexAB-OprM efflux system necessary for productive metabolism of Pseudomonas azelaica HBP1 on 2-hydroxybiphenyl. Front Microbiol 2013; 4:203. [PMID: 23882265 PMCID: PMC3715732 DOI: 10.3389/fmicb.2013.00203] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Accepted: 06/28/2013] [Indexed: 12/20/2022] Open
Abstract
Pseudomonas azelaica HBP1 is one of the few bacteria known to completely mineralize the biocide and toxic compound 2-hydroxybiphenyl (2-HBP), but the mechanisms of its tolerance to the toxicity are unknown. By transposon mutant analysis and screening for absence of growth on water saturating concentrations of 2-HBP (2.7 mM) we preferentially found insertions in three genes with high homology to the mexA, mexB, and oprM efflux system. Mutants could grow at 2-HBP concentrations below 100 μM but at lower growth rates than the wild-type. Exposure of the wild-type to increasing 2-HBP concentrations resulted in acute cell growth arrest and loss of membrane potential, to which the cells adapt after a few hours. By using ethidium bromide (EB) as proxy we could show that the mutants are unable to expel EB effectively. Inclusion of a 2-HBP reporter plasmid revealed that the wild-type combines efflux with metabolism at all 2-HBP concentrations, whereas the mutants cannot remove the compound and arrest metabolism at concentrations above 24 μM. The analysis thus showed the importance of the MexAB-OprM system for productive metabolism of 2-HBP.
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Affiliation(s)
- K Czechowska
- Department of Fundamental Microbiology, University of Lausanne, Bâtiment Biophore, Quartier UNIL-Sorge Lausanne, Switzerland
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Aggarwal S, Karimi IA, Reinaldi Ivan G. In silico modeling and evaluation of Gordonia alkanivorans for biodesulfurization. MOLECULAR BIOSYSTEMS 2013; 9:2530-40. [DOI: 10.1039/c3mb70132h] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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