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Pantoja-Guerra M, Burkett-Cadena M, Cadena J, Dunlap CA, Ramírez CA. Lysinibacillus spp.: an IAA-producing endospore forming-bacteria that promotes plant growth. Antonie Van Leeuwenhoek 2023:10.1007/s10482-023-01828-x. [PMID: 37138159 DOI: 10.1007/s10482-023-01828-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 03/29/2023] [Indexed: 05/05/2023]
Abstract
Lysinibacillus is a bacterial genus that has generated recent interest for its biotechnological potential in agriculture. Strains belonging to this group are recognized for their mosquitocidal and bioremediation activity. However, in recent years some reports indicate its importance as plant growth promoting rhizobacteria (PGPR). This research sought to provide evidence of the PGP activity of Lysinibacillus spp. and the role of the indole-3-acetic acid (IAA) production associated with this activity. Twelve Lysinibacillus spp. strains were evaluated under greenhouse conditions, six of which increased the biomass and root architecture of corn plants. In most cases, growth stimulation was evident at 108 CFU/mL inoculum concentration. All strains produced IAA with high variation between them (20-70 µg/mL). The bioinformatic identification of predicted genes associated with IAA production allowed the detection of the indole pyruvic acid pathway to synthesize IAA in all strains; additionally, genes for a tryptamine pathway were detected in two strains. Extracellular filtrates from all strain's cultures increased the corn coleoptile length in an IAA-similar concentration pattern, which demonstrates the filtrates had an auxin-like effect on plant tissue. Five of the six strains that previously showed PGPR activity in corn also promoted the growth of Arabidopsis thaliana (col 0). These strains induced changes in root architecture of Arabidopsis mutant plants (aux1-7/axr4-2), the partial reversion of mutant phenotype indicated the role of IAA on plant growth. This work provided solid evidence of the association of Lysinibacillus spp. IAA production with their PGP activity, which constitutes a new approach for this genus. These elements contribute to the biotechnological exploration of this bacterial genus for agricultural biotechnology.
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Affiliation(s)
- Manuel Pantoja-Guerra
- Universidad de Antioquia, Instituto de Biología, Medellín, Colombia.
- Facultad de Ciencias Agropecuarias, Unilasallista Corporación Universitaria, Caldas - Antioquia, Colombia.
| | | | | | - Christopher A Dunlap
- United States Department of Agriculture, Agricultural Research Service, National Center for Agricultural Utilization Research, Crop Bioprotection Research Unit, 1815 N University, Peoria, IL, USA
| | - Camilo A Ramírez
- Universidad de Antioquia, Instituto de Biología, Medellín, Colombia
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Khan J, Ali MI, Jamal A, Achakzai JK, Shirazi JH, Haleem A. Assessment of the dibenzothiophene desulfurization potential of indigenously isolated bacterial consortium IQMJ-5: a different approach to safeguard the environment. Arch Microbiol 2023; 205:95. [PMID: 36807206 DOI: 10.1007/s00203-023-03429-8] [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: 11/22/2022] [Revised: 01/26/2023] [Accepted: 01/30/2023] [Indexed: 02/21/2023]
Abstract
Biodesulfurization is emerging as a valuable technology for the desulfurization of dibenzothiophene (DBT) and its alkylated substitutes, which are otherwise regarded as refractory to other physical and chemical desulfurizing techniques. The inability of the currently identified pure cultures and artificial microbial consortia due to lower desulfurization rate and product inhibition issues has compelled the researcher to look for an alternative solution. Thus, in the present study, an indigenously isolated microbial consortium was employed to tackle the desulfurization issue. Herein, we isolated several kinds of DBT desulfurizing natural microbial consortia from hydrocarbon-contaminated soil samples by conventional enrichment technique. The most effective desulfurizing microbial consortium was sequenced through illumine sequencing technique. Finally, the effect of the products of the desulfurizing pathway (such as 2-hydroxybiphenyl (2-HBP) and sulfate (SO4-2) was evaluated on the growth and desulfurization capability of the isolated consortium. The outcomes of Gibb's assay analysis showed that six isolates followed the "4S" pathway and converted DBT to 2-HBP. Among the isolates, I5 showed maximum growth rate (1.078 g/L dry cell weight) and desulfurization activity (about 77% as indicated by HPLC analysis) and was considered for further in-depth experimentation. The analysis of 16S rRNA by high-throughput sequencing approach of the I5 isolate revealed five types of bacterial phyla including Proteobacteria, Bacteroidetes, Firmicutes, Patescibacteria, and Actinobacteria (in order of abundance). The isolate showed significant tolerance to the inhibitory effect of both 2-HBP and SO4-2 and maintained growth in the presence of even about 1.0 mM initial concentration of both products. This clearly suggests that the isolate can be an efficient candidate for future in-depth desulfurization studies of coal and other fossil fuels.
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Affiliation(s)
- Javed Khan
- Department of Microbiology, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan
| | - Muhammad Ishtiaq Ali
- Department of Microbiology, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan.
| | - Asif Jamal
- Department of Microbiology, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan
| | - Jahangir Khan Achakzai
- Discipline of Biochemistry, Department of Natural and Basic Sciences, University of Turbat (KECH), Turbat, 92600, Baluchistan, Pakistan
| | - Jafir Hussain Shirazi
- Department of Pharmaceutics, Faculty of Pharmacy, The Islamia University of Bahawalpur, Bahawalpur, 63100, Punjab, Pakistan
| | - Abdul Haleem
- School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang, 212013, China.
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Gonzáles M, Pucci G. Aislamientos de bacterias post tratamiento con gasoil - agua y centrifugación de fondo de tanques petroleros. REVISTA PERUANA DE BIOLOGÍA 2022. [DOI: 10.15381/rpb.v29i2.21526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Abstract
En la industria petrolera se almacenan grandes cantidades de hidrocarburos en tanques en las diferentes etapas de extracción y procesamiento del crudo hasta su refinamiento. Esto genera un residuo denominado fondo de tanque, es una emulsión estable de sedimentos agua e hidrocarburos. Este trabajo tuvo como objeto estudiar las bacterias que están presentes en el sedimento después de la primera etapa de tratamiento con gasoil, agua, temperatura y posterior centrifugación. El sedimento, considerado por la legislación como residuo peligroso se le realizo un estudio bacteriológico, que consistió en recuento, aislamiento e identifican de bacterias. Se obtuvieron 34 cepas de las cuales 86.1% pertenecieron al género Bacillus. Las mismas presentaron capacidad para desarrollar en alguno de los siguientes hidrocarburos o mezclas de hidrocarburos gasoil, kerosene, hexadecano y ciclohexano.
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Zargar AN, Kumar A, Sinha A, Kumar M, Skiadas I, Mishra S, Srivastava P. Asphaltene biotransformation for heavy oil upgradation. AMB Express 2021; 11:127. [PMID: 34491455 PMCID: PMC8423941 DOI: 10.1186/s13568-021-01285-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 08/19/2021] [Indexed: 11/24/2022] Open
Abstract
Globally, the reserves of heavy crude oil are seven times more abundant than that of light crude, and yet, they are underutilized because of their high viscosity and density, which is largely due to the presence of large amounts of asphaltenes. Biotransformation of heavy oil asphaltenes into smaller metabolites can be used for reducing their viscosity. Several microorganisms capable of asphaltene biodegradation have been reported but only few have been characterized for its biotransformation. In the present study, a 9-membered microbial consortium was isolated from an oil contaminated soil. About 72% and 75% asphaltene biotransformation was achieved by growing cells at shake flask level and in a 1.5 l bioreactor, respectively. A representative structure of asphaltene was constructed based on LC–MS, 1H-NMR, 13C-NMR, FT-IR, ICPMS and elemental analysis (CHNS) of n-heptane purified asphaltene from Maya crude oil. Biotransformation of asphaltene, as analyzed by performing 1H-NMR, FT-IR and elemental analysis, resulted in 80% decrease in S and N when compared to the control along with incorporation of oxygen in the structure of asphaltene. About 91% decrease in the viscosity of the Maya crude oil was observed after two weeks when oil: aqueous phase ratio was 1:9. The results suggest that the isolated microbial consortium can be used for biological upgradation of heavy crude oil. To our knowledge, this is the first report where a microbial consortium resulted in such high asphaltene biotransformation.
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Aderiye BI, Iteke UN, Akinyeye RO, Oluwole OA. Monitoring degradation of restaurant wastewater by Lysinibacillus sphaericus C3-41. ARAB JOURNAL OF BASIC AND APPLIED SCIENCES 2021. [DOI: 10.1080/25765299.2021.1969741] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- B. I. Aderiye
- Department of Microbiology, Ekiti State University, Ado-Ekiti, Nigeria
| | - U. N. Iteke
- Department of Microbiology, Ekiti State University, Ado-Ekiti, Nigeria
| | - R. O. Akinyeye
- Department of Applied Chemistry, Ekiti State University, Ado-Ekiti, Nigeria
| | - O. A. Oluwole
- Department of Microbiology, Ekiti State University, Ado-Ekiti, Nigeria
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Stylianou M, Vyrides I, Agapiou A. Oil biodesulfurization: A review of applied analytical techniques. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1171:122602. [PMID: 33744596 DOI: 10.1016/j.jchromb.2021.122602] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Revised: 02/09/2021] [Accepted: 02/12/2021] [Indexed: 12/26/2022]
Abstract
The wide use of fossil fuels and their associated environmental concerns, highlighted the importance of affordable and clean energy (goal 7), as adopted by the Sustainable Development Goals of the United Nations for 2030. For years now, the detection of sulfur components in liquid fuels is performed mainly for environmental and health purposes in compliance with the respective legislations. Towards this, the aerobic and anaerobic biodesulfurization (BDS) process, which entails the use of microorganisms to limit the sulfur concentration is followed. To ensure effective BDS, several traditional analytical methods are utilized, although they require bench-top, bulky, costly, and time-consuming instruments along with skilled personnel. The currently employed analytical methods are mostly chromatographic techniques (e.g. liquid and gas) coupled with various detectors. To start with, high-performance liquid chromatography with ultraviolet detector (HPLC-UV), as well as electrospray ionization-LC-mass spectrometry (ESI-LC-MS) were mostly reported. Additionally, many detectors were coupled to gas chromatography (CG) including atomic emission detector (GC-AED), flame ionization detector (GC-FID), flame photometric detector (GC-FPD), sulfur fluorescence detector (GC-SFD), mass selective detector (GC-MS), etc. The solid-phase microextraction (SPME) technique provides extra capabilities when added to the separation techniques. Towards the continuous interest in oil supercomplex synthesis, other atmospheric and surface desorption ionization techniques, as well as the multidimensional 2D chromatographic systems (GC × GC and LC × LC) were also investigated, due to their unsurpassed resolution power. The current review ends with final remarks per applied methodology and the necessity to respect and protect the human environment and life.
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Affiliation(s)
- Marinos Stylianou
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Ioannis Vyrides
- Department of Chemical Engineering, Cyprus University of Technology, 57 Anexartisias Str., P.O. BOX 50329, 3603 Limassol, Cyprus
| | - Agapios Agapiou
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus.
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Delegan Y, Kocharovskaya Y, Frantsuzova E, Streletskii R, Vetrova A. Characterization and genomic analysis of Gordonia alkanivorans 135, a promising dibenzothiophene-degrading strain. ACTA ACUST UNITED AC 2021; 29:e00591. [PMID: 33532248 PMCID: PMC7823215 DOI: 10.1016/j.btre.2021.e00591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Revised: 12/23/2020] [Accepted: 01/11/2021] [Indexed: 11/11/2022]
Abstract
Strain 135 is first dibenzothiophene-degrading Gordonia with genome fully assembled. This is the first strain of Gordonia absorbing thiophene sulfur without dsz genes. The strain utilized 45.26 % of dibenzothiophene within 150 h of growth at 26 °C.
Sulfur is the third most abundant element in crude oil. Up to 70 % of sulfur in petroleum is found in the form of dibenzothiophene (DBT) and substituted DBTs. The aim of this work was to study the physiological, biochemical and genetical characteristics of Gordonia alkanivorans 135 capable of using DBT as the sole source of sulfur. The genome of G. alkanivorans 135 consists of a 5,039,827 bp chromosome and a 164,963 bp circular plasmid. We found the absence of dsz operon present in most DBT degrading bacteria, but discovered other genes that are presumably involved in DBT utilization by G. alkanivorans 135. The strain utilized 45.26 % of DBT within 150 h of growth at 26 °C. This is the first strain of Gordonia capable of absorbing thiophene sulfur without the aid of the dsz genes.
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Affiliation(s)
- Yanina Delegan
- Federal Research Center "Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences", Pushchino, Moscow Region, 142290, Russian Federation
| | - Yulia Kocharovskaya
- Federal Research Center "Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences", Pushchino, Moscow Region, 142290, Russian Federation.,The Federal State Budget Educational Institution of Higher Education Pushchino State Institute of Natural Science, Pushchino, Moscow Region, 142290, Russian Federation
| | - Ekaterina Frantsuzova
- Federal Research Center "Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences", Pushchino, Moscow Region, 142290, Russian Federation.,The Federal State Budget Educational Institution of Higher Education Pushchino State Institute of Natural Science, Pushchino, Moscow Region, 142290, Russian Federation
| | - Rostislav Streletskii
- Faculty of Soil Science, Laboratory of Ecological Soil Science, Lomonosov Moscow State University, Moscow, 119991, Russian Federation
| | - Anna Vetrova
- Federal Research Center "Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences", Pushchino, Moscow Region, 142290, Russian Federation
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Nassar HN, Abu Amr SS, El-Gendy NS. Biodesulfurization of refractory sulfur compounds in petro-diesel by a novel hydrocarbon tolerable strain Paenibacillus glucanolyticus HN4. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:8102-8116. [PMID: 33048293 DOI: 10.1007/s11356-020-11090-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 10/01/2020] [Indexed: 06/11/2023]
Abstract
One of the main precursors of air pollution and acid rains is the presence of the recalcitrant thiophenic compounds, for example dibenzothiophene (DBT) and its derivatives in transportation fuels. In an attempt to achieve the worldwide regulations of ultra-low sulfur transportation fuels without affecting its hydrocarbon skeleton, a biphasic medium containing 100 mg/L DBT dissolved in n-hexadecane (1/4 oil/water v/v) used for enrichment and isolation of selective biodesulfurizing bacterium from an oil-polluted sediment sample collected from Egyptian Red Sea shoreline. The isolated bacterium is facultative anaerobe, motile, spore-former, and mesophile. It is genetically identified as Paenibacillus glucanolyticus strain HN4 (NCBI Gene Bank Accession No. MT645230). HN4 desulfurized DBT as a model of the recalcitrant thiophenic compounds without affecting its hydrocarbon skeleton via the 4S-pathway producing 2-hydroxybiphenyl (2-HBP) as a dead end product. HN4 substantiated to be a hydrocarbon tolerant, biosurfactants(s) producer, and endorsed unique enzymatic system capable of desulfurizing broad range of thiophenic compounds and expressed an efficient desulfurization activity against the recalcitrant alkylated DBTs. As far our knowledge, it is the first reported BDS study using P. glucanolyticus. Statistical optimization based on One-Factor-At-A-Time (OFAT) technique and response surface methodology (RSM) applied for elucidation of mathematical model correlations describing and optimizing the effect of different physicochemical parameters on batch biphasic BDS process. That illustrated an approximate increase in BDS efficiency by 1.34 fold and recorded 94% sulfur removal in biphasic batch process at optimum operation conditions of 120 h, 0.14 wt% S-content model oil (DBT dissolved in n-hexadecane), 33.5 °C, pH7 and 1/1 oil/water phase ratio, and 147 rpm. Resting cells of HN4 in a biphasic reactor (1/1 v/v) decreased the sulfur content of a refractory thiophenic model oil (thiophene, benzothiophene, DBT, and alkylated DBT dissolved in n-hexadecane) from 0.14 to 0.027 wt%, and petro-diesel from 0.2 to 0.04 wt%, within 120 h, keeping the calorific value of the treated fuel intact. Consequently, that novel strain could be recommended as a promising candidate for BDS as complementary to hydrodesulfurization process in oil refinery.
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Affiliation(s)
- Hussein N Nassar
- Petroleum Biotechnology Lab., Department of Process Design and Development, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, 11727, Egypt
- Department of Microbiology, Faculty of Pharmacy, October University for Modern Sciences and Arts (MSA), 6th of October City, Giza, 12566, Egypt
- Nanobiotechnology Program, Faculty of Nanotechnology for Postgraduate Studies, Cairo University, Sheikh Zayed Branch Campus, Sheikh Zayed City, Giza, 12588, Egypt
| | - Salem S Abu Amr
- Faculty of Engineering, Karabuk University, Demir Campus, 78050 Karabuk, Turkey
| | - Nour Sh El-Gendy
- Petroleum Biotechnology Lab., Department of Process Design and Development, Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, 11727, Egypt.
- Nanobiotechnology Program, Faculty of Nanotechnology for Postgraduate Studies, Cairo University, Sheikh Zayed Branch Campus, Sheikh Zayed City, Giza, 12588, Egypt.
- Center of Excellence, October University for Modern Sciences and Arts (MSA), 6th of October City, Giza, 12566, Egypt.
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Kayedi N, Samimi A, Asgari Bajgirani M, Bozorgian A. Enhanced oxidative desulfurization of model fuel: A comprehensive experimental study. SOUTH AFRICAN JOURNAL OF CHEMICAL ENGINEERING 2021. [DOI: 10.1016/j.sajce.2020.09.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Wu X, Zhou H, Li L, Wang E, Zhou X, Gu Y, Wu X, Shen L, Zeng W. Whole Genome Sequencing and Comparative Genomic Analyses of Lysinibacillus pakistanensis LZH-9, a Halotolerant Strain with Excellent COD Removal Capability. Microorganisms 2020; 8:microorganisms8050716. [PMID: 32408484 PMCID: PMC7284689 DOI: 10.3390/microorganisms8050716] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/07/2020] [Accepted: 05/08/2020] [Indexed: 11/26/2022] Open
Abstract
Halotolerant microorganisms are promising in bio-treatment of hypersaline industrial wastewater. Four halotolerant bacteria strains were isolated from wastewater treatment plant, of which a strain LZH-9 could grow in the presence of up to 14% (w/v) NaCl, and it removed 81.9% chemical oxygen demand (COD) at 96 h after optimization. Whole genome sequencing of Lysinibacillus pakistanensis LZH-9 and comparative genomic analysis revealed metabolic versatility of different species of Lysinibacillus, and abundant genes involved in xenobiotics biodegradation, resistance to toxic compound, and salinity were found in all tested species of Lysinibacillus, in which Horizontal Gene Transfer (HGT) contributed to the acquisition of many important properties of Lysinibacillus spp. such as toxic compound resistance and osmotic stress resistance as revealed by phylogenetic analyses. Besides, genome wide positive selection analyses revealed seven genes that contained adaptive mutations in Lysinibacillus spp., most of which were multifunctional. Further expression assessment with Codon Adaption Index (CAI) also reflected the high metabolic rate of L. pakistanensis to digest potential carbon or nitrogen sources in organic contaminants, which was closely linked with efficient COD removal ability of strain LZH-9. The high COD removal efficiency and halotolerance as well as genomic evidences suggested that L. pakistanensis LZH-9 was promising in treating hypersaline industrial wastewater.
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Affiliation(s)
- Xueling Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; (X.W.); (H.Z.); (L.L.); (E.W.); (X.Z.); (Y.G.); (X.W.); (L.S.)
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Han Zhou
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; (X.W.); (H.Z.); (L.L.); (E.W.); (X.Z.); (Y.G.); (X.W.); (L.S.)
| | - Liangzhi Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; (X.W.); (H.Z.); (L.L.); (E.W.); (X.Z.); (Y.G.); (X.W.); (L.S.)
| | - Enhui Wang
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; (X.W.); (H.Z.); (L.L.); (E.W.); (X.Z.); (Y.G.); (X.W.); (L.S.)
| | - Xiangyu Zhou
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; (X.W.); (H.Z.); (L.L.); (E.W.); (X.Z.); (Y.G.); (X.W.); (L.S.)
| | - Yichao Gu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; (X.W.); (H.Z.); (L.L.); (E.W.); (X.Z.); (Y.G.); (X.W.); (L.S.)
| | - Xiaoyan Wu
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; (X.W.); (H.Z.); (L.L.); (E.W.); (X.Z.); (Y.G.); (X.W.); (L.S.)
| | - Li Shen
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; (X.W.); (H.Z.); (L.L.); (E.W.); (X.Z.); (Y.G.); (X.W.); (L.S.)
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
| | - Weimin Zeng
- School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China; (X.W.); (H.Z.); (L.L.); (E.W.); (X.Z.); (Y.G.); (X.W.); (L.S.)
- Key Laboratory of Biometallurgy of Ministry of Education, Central South University, Changsha 410083, China
- Correspondence: ; Tel.: +86-0731-88877472
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Sharma R, Singh J, Verma N. A novel spectrophotometric method for simultaneous estimation of dibenzothiophene and 2-hydroxybiphenyl in their mixed spectrum and its application in screening of specific biodesulfurizing microbes. 3 Biotech 2020; 10:153. [PMID: 32181115 DOI: 10.1007/s13205-020-2138-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 02/14/2020] [Indexed: 10/24/2022] Open
Abstract
The desulfurization of fuel is currently enforced to meet environmental legislation and prevent pollution. The use of specific biodesulfurizing microbes with a unique 4S pathway allows the desulfurization without compromising the quality of fuel. These specific microbes can be screened by the detection of 2-hydroxybiphenol (2-HBP) in desulfurizing mixture of dibenzothiophene (DBT). At present, colorimetric Gibb's assay is the most commonly employed screening method which requires a specific reagent, i.e., 2,6-dichloroquninone-4-chloramide. In the present study, a novel and simple spectrophotometric method was developed for the detection of 2-HBP for screening purpose based on dual wavelength method. The developed method facilitates the simultaneous analysis of DBT desulfurization and 2-HBP production in a sample by merely measuring the absorbance differences at two specified wavelengths, i.e., ΔA (λ 320-λ 247) for DBT and ΔA (λ 286-λ 324) for 2-HBP. The developed method was used to screen 57 microbes and two specific desulfurizing microbes Bacillus flexus MS-5 and Bacillus cereus BR-31 were selected based on 2-HBP production. The outcomes of developed method were validated by HPLC analysis. The strains MS-5 and BR-31 were employed in biodesulfurization and resulted in 54.88 ± 1.12% and 55.72 ± 1.32% desulfurization of 1.0 mM DBT, respectively. The developed method for screening of specific desulfurizing microbes does not require any specific reagent or sophisticated instrument in spite of being quick and reliable. The microbes selected by developed method exhibited excellent potential for biodesulfurization of fuel.
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Fenibo EO, Ijoma GN, Selvarajan R, Chikere CB. Microbial Surfactants: The Next Generation Multifunctional Biomolecules for Applications in the Petroleum Industry and Its Associated Environmental Remediation. Microorganisms 2019; 7:E581. [PMID: 31752381 PMCID: PMC6920868 DOI: 10.3390/microorganisms7110581] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 09/24/2019] [Accepted: 09/24/2019] [Indexed: 11/30/2022] Open
Abstract
Surfactants are a broad category of tensio-active biomolecules with multifunctional properties applications in diverse industrial sectors and processes. Surfactants are produced synthetically and biologically. The biologically derived surfactants (biosurfactants) are produced from microorganisms, with Pseudomonas aeruginosa, Bacillus subtilis Candida albicans, and Acinetobacter calcoaceticus as dominant species. Rhamnolipids, sophorolipids, mannosylerithritol lipids, surfactin, and emulsan are well known in terms of their biotechnological applications. Biosurfactants can compete with synthetic surfactants in terms of performance, with established advantages over synthetic ones, including eco-friendliness, biodegradability, low toxicity, and stability over a wide variability of environmental factors. However, at present, synthetic surfactants are a preferred option in different industrial applications because of their availability in commercial quantities, unlike biosurfactants. The usage of synthetic surfactants introduces new species of recalcitrant pollutants into the environment and leads to undesired results when a wrong selection of surfactants is made. Substituting synthetic surfactants with biosurfactants resolves these drawbacks, thus interest has been intensified in biosurfactant applications in a wide range of industries hitherto considered as experimental fields. This review, therefore, intends to offer an overview of diverse applications in which biosurfactants have been found to be useful, with emphases on petroleum biotechnology, environmental remediation, and the agriculture sector. The application of biosurfactants in these settings would lead to industrial growth and environmental sustainability.
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Affiliation(s)
- Emmanuel O. Fenibo
- World Bank Africa Centre of Excellence, Centre for Oilfield Chemical Research, University of Port Harcourt, Port Harcourt 500272, Nigeria
| | - Grace N. Ijoma
- Institute for the Development of Energy for African Sustainability, University of South Africa, Roodepoort 1709, South Africa;
| | - Ramganesh Selvarajan
- Department of Environmental Science, University of South Africa, Florida Campus, Rooderpoort 1709, South Africa
| | - Chioma B. Chikere
- Department of Microbiology, Faculty of Science, University of Port Harcourt, Port Harcourt 500272, Nigeria;
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Sikarwar P, Gosu V, Subbaramaiah V. An overview of conventional and alternative technologies for the production of ultra-low-sulfur fuels. REV CHEM ENG 2019. [DOI: 10.1515/revce-2017-0082] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Environmental concerns have given a great deal of attention for the production of ultra-low-sulfur fuels. The conventional hydrodesulfurization (HDS) process has high operating cost and also encounters difficulty in removing sulfur compound with steric hindrance. Consequently, various research efforts have been made to overcome the limitation of conventional HDS process and exploring the alternative technologies for deep desulfurization. The alternative processes being explored for the production of ultra-low-sulfur content fuel are adsorptive desulfurization (ADS), biodesulfurization (BDS), oxidative desulfurization (ODS), and extractive desulfurization (EDS). The present article provided the comprehensive information on the basic principle, reaction mechanism, workability, advantages, and disadvantages of conventional and alternative technologies. This review article aims to provide valuable insight into the recent advances made in conventional HDS process and alternative techniques. For deep desulfurization of liquid fuels, integration of conventional HDS with an alternative technique is also proposed.
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Enzymatic Desulfurization of Crude Oil and Its Fractions: A Mini Review on the Recent Progresses and Challenges. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2019. [DOI: 10.1007/s13369-019-03800-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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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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Akhtar N, Akhtar K, Ghauri MA. Biodesulfurization of Thiophenic Compounds by a 2-Hydroxybiphenyl-Resistant Gordonia sp. HS126-4N Carrying dszABC Genes. Curr Microbiol 2017; 75:597-603. [PMID: 29264784 DOI: 10.1007/s00284-017-1422-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 12/15/2017] [Indexed: 12/23/2022]
Abstract
Microorganisms can metabolize or transform a range of known chemical compounds present in fossil fuels by naturally having highly specific metabolic activities. In this context, the microbial desulfurization of fuels is an attractive and alternative process to the conventional hydrodesulfurization (HDS) process, since the thiophenic sulfur containing compounds such as dibenzothiophene (DBT) and benzothiophene (BT) cannot be removed by HDS. A DBT desulfurizing mesophilic bacterium, identified on the basis of 16S rRNA gene sequence as Gordonia sp. HS126-4N (source: periphery soil of a coal heap) has been evaluated for its biodesulfurization traits and potential to desulfurize the thiophenic compounds. The HPLC and LC/MS analyses of the metabolites produced from DBT desulfurization and PCR-based nucleotide sequence confirmation of the key desulfurizing genes (dszA/dszB/dszC) proved that HS126-4N could convert DBT to 2-hydroxybiphenyl (2-HBP) via the 4S pathway. The isolate could convert 0.2 mM of DBT to 2-HBP within 48 h and was reasonably tolerant against the inhibitory effect of 2-HBP (retained 70% of growth at 0.5 mM 2-HBP). The isolated biocatalyst desulfurized/degraded 100% of 0.2 mM of 4-methyl DBT, 2,8-dimethyl DBT, BT and 3-methyl BT within 108 h. The capabilities to survive and desulfurize a broad range of thiophenic sulfur containing substrates as well as less inhibition by the 2-HBP suggest that HS126-4N could be a potential candidate for improved biodesulfurization/organic sulfur removal from fossil fuels.
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Affiliation(s)
- Nasrin Akhtar
- Industrial Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, Jhang Road, P.O. Box 577, Faisalabad, Pakistan.
| | - Kalsoom Akhtar
- Industrial Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, Jhang Road, P.O. Box 577, Faisalabad, Pakistan
| | - Muhammad A Ghauri
- Industrial Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, Jhang Road, P.O. Box 577, Faisalabad, Pakistan
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Gómez-Garzón C, Hernández-Santana A, Dussán J. A genome-scale metabolic reconstruction of Lysinibacillus sphaericus unveils unexploited biotechnological potentials. PLoS One 2017; 12:e0179666. [PMID: 28604819 PMCID: PMC5467902 DOI: 10.1371/journal.pone.0179666] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 06/01/2017] [Indexed: 01/25/2023] Open
Abstract
The toxic lineage (TL) of Lysinibacillus sphaericus has been extensively studied because of its potential biotechnological applications in biocontrol of mosquitoes and bioremediation of toxic metals. We previously proposed that L. sphaericus TL should be considered as a novel species based on a comparative genomic analysis. In the current work, we constructed the first manually curated metabolic reconstruction for this species on the basis of the available genomes. We elucidated the central metabolism of the proposed species and, beyond confirming the reported experimental evidence with genomic a support, we found insights to propose novel applications and traits to be considered in further studies. The strains belonging to this lineage exhibit a broad repertory of genes encoding insecticidal factors, some of them remain uncharacterized. These strains exhibit other unexploited biotechnological important traits, such as lactonases (quorum quenching), toxic metal resistance, and potential for aromatic compound degradation. In summary, this study provides a guideline for further research aimed to implement this organism in biocontrol and bioremediation. Similarly, we highlighted the unanswered questions to be responded in order to gain a deeper understanding of the L. sphaericus TL biology.
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Affiliation(s)
- Camilo Gómez-Garzón
- Centro de investigaciones microbiológicas (CIMIC), Universidad de los Andes, Bogotá, Colombia
| | | | - Jenny Dussán
- Centro de investigaciones microbiológicas (CIMIC), Universidad de los Andes, Bogotá, Colombia
- * E-mail:
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Eremina OE, Sidorov AV, Shekhovtsova TN, Goodilin EA, Veselova IA. Novel Multilayer Nanostructured Materials for Recognition of Polycyclic Aromatic Sulfur Pollutants and Express Analysis of Fuel Quality and Environmental Health by Surface Enhanced Raman Spectroscopy. ACS APPLIED MATERIALS & INTERFACES 2017; 9:15058-15067. [PMID: 28402098 DOI: 10.1021/acsami.7b02018] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A novel concept of advanced SERS (surface enhanced Raman spectroscopy) planar sensors is suggested for fast analysis of sulfur-containing hazardous oil components and persistent pollutants. The main advantage of the proposed sensors is the utilization of an additional preconcentrating layer of optically transparent chitosan gel, which is chemically modified with appropriate π-acceptor compounds to selectively form charge-transfer complexes (CTCs) at the interface with nanostructured silver coatings. The CTCs shift absorption bands of polycyclic aromatic sulfur heterocycles (PASHs) and other important analytes in a controllable way and thus provide a surplus enhancement of vibration modes due to resonant Raman scattering. This novel indicator system provides multiplex determination of PASHs in different forms in a small volume of oil without any tedious sample pretreatment steps. This approach opens new possibilities of increasing either spectral and concentration sensitivity or specificity of SERS-based sensors, allowing for new developments in the fields of ecology, advanced fuel analysis, and other prospective applications.
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Affiliation(s)
- Olga E Eremina
- Faculty of Chemistry, Moscow State University , Lenin Hills, 1-3, Moscow 119991, Russia
| | - Alexander V Sidorov
- Faculty of Materials Science, Moscow State University , Lenin Hills, 1-73, Moscow 119991, Russia
| | | | - Eugene A Goodilin
- Faculty of Chemistry, Moscow State University , Lenin Hills, 1-3, Moscow 119991, Russia
- Faculty of Materials Science, Moscow State University , Lenin Hills, 1-73, Moscow 119991, Russia
- Institute of General and Inorganic Chemistry , Leninskii prosp., 31, Moscow 119071, Russia
| | - Irina A Veselova
- Faculty of Chemistry, Moscow State University , Lenin Hills, 1-3, Moscow 119991, Russia
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Li L, Yang K, Lin J, Liu J. Operational aspects of SO 2 removal and microbial population in an integrated-bioreactor with two bioreaction zones. Bioprocess Biosyst Eng 2016; 40:285-296. [PMID: 27770202 DOI: 10.1007/s00449-016-1696-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 10/15/2016] [Indexed: 10/20/2022]
Abstract
An integrated-bioreactor, which consisted of a suspended zone and an immobilized zone, was applied to treat gases containing SO2. The removal of SO2 in suspended zone differed slightly from that in immobilized zone. The influences of operational aspects such as SO2 load, temperature, and pH on integrated-bioreactor performance and bacterial community composition were investigated. The synergistic action of the two zones led to effective reduction of SO2, and the total removal efficiencies with the inlet concentration of 91-117 mg/m3, were over 85 % in steady state. Paenibacillus sp. and Lysinibacillus sp. dominated both zones as desulfurization bacteria. Results of polymerase chain reaction-denaturing gradient gel electrophoresis followed by clone library analysis indicated that temporal shifts in bacterial community composition in both zones developed differently. Differences in the concentration of introduced SO2 and supported mode of microorganisms for survival, confirmed that bacterial community composition and abundance significantly differed among individual zones.
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Affiliation(s)
- Lin Li
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China. .,University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Kaixiong Yang
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Jian Lin
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Junxin Liu
- Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.,University of Chinese Academy of Sciences, Beijing, 100049, China
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Identification of a new operon involved in desulfurization of dibenzothiophenes using a metagenomic study and cloning and functional analysis of the genes. Enzyme Microb Technol 2016; 87-88:24-8. [DOI: 10.1016/j.enzmictec.2016.02.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Revised: 02/12/2016] [Accepted: 02/18/2016] [Indexed: 02/06/2023]
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21
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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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Mnif I, Mnif S, Sahnoun R, Maktouf S, Ayedi Y, Ellouze-Chaabouni S, Ghribi D. Biodegradation of diesel oil by a novel microbial consortium: comparison between co-inoculation with biosurfactant-producing strain and exogenously added biosurfactants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2015; 22:14852-61. [PMID: 25994261 DOI: 10.1007/s11356-015-4488-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Accepted: 04/02/2015] [Indexed: 05/21/2023]
Abstract
Bioremediation, involving the use of microorganisms to detoxify or remove pollutants, is the most interesting strategy for hydrocarbon remediation. In this aim, four hydrocarbon-degrading bacteria were isolated from oil-contaminated soil in Tunisia. They were identified by the 16S rDNA sequence analysis, as Lysinibacillus bronitolerans RI18 (KF964487), Bacillus thuringiensis RI16 (KM111604), Bacillus weihenstephanensis RI12 (KM094930), and Acinetobacter radioresistens RI7 (KJ829530). Moreover, a lipopeptide biosurfactant produced by Bacillus subtilis SPB1, confirmed to increase diesel solubility, was tested to increase diesel biodegradation along with co-inoculation with two biosurfactant-producing strains. Culture studies revealed the enhancement of diesel biodegradation by the selected consortium with the addition of SPB1 lipopeptide and in the cases of co-inoculation by biosurfactant-producing strain. In fact, an improvement of about 38.42 and 49.65 % of diesel degradation was registered in the presence of 0.1 % lipopeptide biosurfactant and when culturing B. subtilis SPB1 strain with the isolated consortium, respectively. Furthermore, the best improvement, evaluated to about 55.4 %, was recorded when using the consortium cultured with B. subtilis SPB1 and A. radioresistens RI7 strains. Gas chromatography analyses were correlated with the gravimetric evaluation of the residual hydrocarbons. Results suggested the potential applicability of the selected consortium along with the ex situ- and in situ-added biosurfactant for the effective bioremediation of diesel-contaminated water and soil.
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Affiliation(s)
- Inès Mnif
- Unit " Enzymes et Bioconversion," National School of Engineers of Sfax, University of Sfax, ENIS, BP W, 3038, Sfax, Tunisia.
- Higher Institute of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia.
| | - Sami Mnif
- Center of Biotechnology of Sfax, Sfax, Tunisia
| | - Rihab Sahnoun
- Unit " Enzymes et Bioconversion," National School of Engineers of Sfax, University of Sfax, ENIS, BP W, 3038, Sfax, Tunisia
- Higher Institute of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia
| | - Sameh Maktouf
- Unit " Enzymes et Bioconversion," National School of Engineers of Sfax, University of Sfax, ENIS, BP W, 3038, Sfax, Tunisia
| | | | - Semia Ellouze-Chaabouni
- Unit " Enzymes et Bioconversion," National School of Engineers of Sfax, University of Sfax, ENIS, BP W, 3038, Sfax, Tunisia
| | - Dhouha Ghribi
- Unit " Enzymes et Bioconversion," National School of Engineers of Sfax, University of Sfax, ENIS, BP W, 3038, Sfax, Tunisia
- Higher Institute of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia
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Pi Y, Xu N, Bao M, Li Y, Lv D, Sun P. Bioremediation of the oil spill polluted marine intertidal zone and its toxicity effect on microalgae. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2015; 17:877-885. [PMID: 25786771 DOI: 10.1039/c5em00005j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Custom-designed devices with 0.6 m (L) × 0.3 m (W) × 0.4 m (H) and a microbial consortium were applied to simulate bioremediation on the oil spill polluted marine intertidal zone. After the bioremediation, the removal efficiency of n-alkanes and polycyclic aromatic hydrocarbon homologues in crude oil evaluated by GC-MS were higher than 58% and 41% respectively. Besides, the acute toxicity effects of crude oil on three microalgae, i.e. Dicrateria sp., Skeletonema costatum and Phaeodactylum tricornutum, varied with concentration. The effects of microbe and surfactant treated water on the three microalgae followed a decreasing order: the microbial consortium plus Tween-80 > the microbial consortium > Tween-80. During 96 h, the cell densities of the three microalgae in treated seawater increased from 4.0 × 10(5), 1.0 × 10(5) and 2.5 × 10(5) cells per mL to 1.7 × 10(6), 8.5 × 10(5) and 2.5 × 10(6) cells per mL, respectively, which illustrated that the quality of seawater contaminated by crude oil was significantly improved by the bioremediation.
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Affiliation(s)
- Yongrui Pi
- Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 238 Songling Road, Qingdao 266100, Shandong, China.
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Bhasarkar JB, Dikshit PK, Moholkar VS. Ultrasound assisted biodesulfurization of liquid fuel using free and immobilized cells of Rhodococcus rhodochrous MTCC 3552: A mechanistic investigation. BIORESOURCE TECHNOLOGY 2015; 187:369-378. [PMID: 25863901 DOI: 10.1016/j.biortech.2015.03.102] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 02/01/2015] [Accepted: 03/09/2015] [Indexed: 06/04/2023]
Abstract
This paper attempts to gain mechanistic insight into enhancement effect of sonication on biodesulfurization. The approach has been to fit Haldane kinetics model to dibenzothiophene (DBT) metabolism and analyze trends in model parameters concurrently with simulations of cavitation bubble dynamics. Mechanistic synergy between sonication and biodesulfurization is revealed to be of both physical and chemical nature. Generation of micro-turbulence in medium by sonication leads to fine emulsification and enhancement of DBT transport across organic/aqueous interphase. Microturbulence also enhances transport of substrate and product across cell wall that increases reaction velocity (Vmax). Michaelis constant (Km) and inhibition constant (KI), being intrinsic parameters, remain unaffected by sonication. Radicals produced by transient cavitation oxidize DBT to DBT-sulfoxide and DBT-sulfone (intermediates of metabolism), which contributes enhancement of biodesulfurization. However, high shear generated by ultrasound and cavitation has adverse effect on action of surfactant β-cyclodextrin for enhancement of interphase transport of DBT.
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Affiliation(s)
- Jaykumar B Bhasarkar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Pritam Kumar Dikshit
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India
| | - Vijayanand S Moholkar
- Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India.
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Elmi F, Etemadifar Z, Emtiazi G. A novel metabolite (1,3-benzenediol, 5-hexyl) production by Exophiala spinifera strain FM through dibenzothiophene desulfurization. World J Microbiol Biotechnol 2015; 31:813-21. [PMID: 25752234 DOI: 10.1007/s11274-015-1835-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Accepted: 02/28/2015] [Indexed: 11/29/2022]
Abstract
Sulfur dioxide which is released from petroleum oil combustion causes pollution over the atmosphere and the soil. Biodesulfurization can be used as a complementary method of hydrodesulfurization, the common method of petroleum desulfurization in refineries. Many studies have been carried out to develop biological desulfurization of dibenzothiophene (DBT) with bacterial biocatalysts. However, fungi are capable to metabolize a wide range of aromatic hydrocarbons through cytochrome P450 and their extracellular enzymes. The aim of the present work was isolation and identification of fungi biocatalysts capable for DBT utilization as sulfur source and production of novel metabolites. DBT consumption and the related produced metabolites were analyzed by HPLC and GC-MS respectively. One of the isolated fungi that could utilize DBT as sole sulfur source was identified by both traditional and molecular experiments and registered in NCBI as Exophiala spinifera FM strain (accession no. KC952672). This strain could desulfurize 99 % of DBT (0.3 mM) as sulfur source by co-metabolism reaction with other carbon sources through the same pathway as 4S and produced 2-hydroxy biphenyl (2-HBP) during 7 days of incubation at 30 °C and 180 rpm shaking. However, the isolate was able to transform 2-HBP to 1,3-benzenediol, 5-hexyl. While biphenyl compounds are toxic to leaving cells, biotransformation of them can reduce their toxicity and the fungi will be more tolerant to the final product. These data are the first report about the desulfurization of DBT comparable to 4S-pathway and production of innovative metabolite by E. spinifera FM strain.
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Affiliation(s)
- Fatemeh Elmi
- Department of Biology, Faculty of Science, University of Isfahan, Hezarjarib St, Isfahan, Iran,
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Khedkar S, Shanker R. Isolation and classification of a soil actinomycete capable of sulphur-specific biotransformation of dibenzothiophene, benzothiophene and thianthrene. J Appl Microbiol 2014; 118:62-74. [PMID: 25319398 DOI: 10.1111/jam.12665] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Revised: 10/12/2014] [Accepted: 10/13/2014] [Indexed: 01/08/2023]
Abstract
AIM To isolate actinomycete spp with the ability to desulphurize sulphur-containing heterocyclic compounds present in petroleum. METHODS AND RESULTS Enrichment cultures were set up to select and isolate sulphur heterocycle metabolizing soil micro-organisms. Screening of the microbial isolates for the desulphurization property led to isolation of R3. The isolate was characterized by PCR screening of 16S rRNA genes and classical taxonomic investigations. HPLC analysis of the desulphurization assays with R3 showed ~85% transformation of dibenzothiophene (270 μmol l(-1)), present as the sole sulphur source in basal salt medium, in 4 days. Production of the desulphurized dibenzothiophene metabolite, 2-hydroxybiphenyl, was confirmed by GC/MS analyses. GC/MS analyses also established the ability of R3 to transform benzothiophene to benzothiophene-1-oxide and benzothiophene-1, 1-dioxide, and thianthrene to thianthrene-5-oxide. PCR primers computed based on the desulphurization operon (dszABC) of Rhodococcus erythropolis IGTS8 yielded the predicted amplification products with R3 genomic DNA as template. Southern hybridization and restriction endonuclease digestion profiles indicated that R3 amplicons were homologous to dsz AB. CONCLUSIONS The enrichment method used in this study yielded an environmental isolate with the ability to transform multiple sulphur heterocycles. The isolate R3 has taxonomic proximity to the Oerskovia sp, order Actinomycetales. The isolate R3 selectively removes sulphur from dibenzothiophene yielding 2-hydroxybiphenyl and sulphate. R3 also transforms benzothiophene and thianthrene in a sulphur-targeted manner. The desulphurization genes in R3 bear similarity to those in R. erythropolis IGTS8. SIGNIFICANCE AND IMPACT OF THE STUDY The actinomycetes present in soil can remove sulphur from different sulphur heterocycle substrates and have potential as biodesulphurization catalysts.
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Affiliation(s)
- S Khedkar
- CSIR-National Environmental Engineering Research Institute, Nagpur, Maharashtra, India
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Buzanello EB, Rezende RP, Sousa FMO, Marques EDLS, Loguercio LL. A novel Bacillus pumilus-related strain from tropical landfarm soil is capable of rapid dibenzothiophene degradation and biodesulfurization. BMC Microbiol 2014; 14:257. [PMID: 25293673 PMCID: PMC4197255 DOI: 10.1186/s12866-014-0257-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Accepted: 09/26/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The presence of organic sulfur-containing compounds in the environment is harmful to animals and human health. The combustion of these compounds in fossil fuels tends to release sulfur dioxide in the atmosphere, which leads to acid rain, corrosion, damage to crops, and an array of other problems. The process of biodesulfurization rationally exploits the ability of certain microorganisms in the removal of sulfur prior to fuel burning, without loss of calorific value. In this sense, we hypothesized that bacterial isolates from tropical landfarm soils can demonstrate the ability to degrade dibenzothiophene (DBT), the major sulfur-containing compound present in fuels. RESULTS Nine bacterial isolates previously obtained from a tropical landfarm soil were tested for their ability to degrade dibenzothiophene (DBT). An isolate labeled as RR-3 has shown the best performance and was further characterized in the present study. Based on physiological aspects and 16 s rDNA sequencing, this isolate was found to be very closely related to the Bacillus pumillus species. During its growth, high levels of DBT were removed in the first 24 hours, and a rapid DBT degradation within the first hour of incubation was observed when resting cells were used. Detection of 2-hydroxybiphenyl (HBP), a marker for the 4S pathway, suggests this strain has metabolical capability for DBT desulfurization. The presence of MgSO4 in growth medium as an additional sulfur source has interfered with DBT degradation. CONCLUSIONS To our knowledge, this is the first study showing that a Bacillus strain can metabolize DBT via the 4S pathway. However, further evidences suggest RR-3 can also use DBT (and/or its derivative metabolites) as carbon/sulfur source through another type of metabolism. Compared to other reported DBT-degrading strains, the RR-3 isolate showed the highest capacity for DBT degradation ever described in quantitative terms. The potential application of this isolate for the biodesulfurization of this sulfur-containing compound in fuels prior to combustion was discussed.
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Affiliation(s)
- Elizandra Bruschi Buzanello
- Department of Biological Sciences, State University of Santa Cruz - UESC, Rod. BR 415, Km 16, 45662-900, Ilhéus, BA, Brazil. .,Faculty São Miguel do Iguaçu - UNIGUAÇU/FAESI, Rua Valentin Celeste Palavro, 1501, Jardim Panorama, 85877-000, São Miguel do Iguaçu, PR, Brazil.
| | - Rachel Passos Rezende
- Department of Biological Sciences, State University of Santa Cruz - UESC, Rod. BR 415, Km 16, 45662-900, Ilhéus, BA, Brazil.
| | - Fernanda Maria Oliveira Sousa
- Department of Biological Sciences, State University of Santa Cruz - UESC, Rod. BR 415, Km 16, 45662-900, Ilhéus, BA, Brazil.
| | - Eric de Lima Silva Marques
- Department of Biological Sciences, State University of Santa Cruz - UESC, Rod. BR 415, Km 16, 45662-900, Ilhéus, BA, Brazil.
| | - Leandro Lopes Loguercio
- Department of Biological Sciences, State University of Santa Cruz - UESC, Rod. BR 415, Km 16, 45662-900, Ilhéus, BA, Brazil.
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Hu GP, Zhao Y, Song FQ, Liu B, Vasseur L, Douglas C, You MS. Isolation, identification and cyfluthrin-degrading potential of a novel Lysinibacillus sphaericus strain, FLQ-11-1. Res Microbiol 2013; 165:110-8. [PMID: 24287233 DOI: 10.1016/j.resmic.2013.11.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Accepted: 11/11/2013] [Indexed: 10/26/2022]
Abstract
Strain FLQ-11-1, isolated from sewage sludge, was able to degrade cyfluthrin and was identified as Lysinibacillus sphaericus based on its morphology, 16S rRNA sequence and fatty acid methyl ester (FAME) analyses. This strain could use cyfluthrin as its carbon or nitrogen source. Response surface methodology (RSM) analysis showed that the optimum conditions for degradation were at pH 7.0 and 35 °C, using an inoculum amount with an OD600nm value of 1.6. Under these conditions, approximately 80.4% of cyfluthrin (50 mgl(-1)) was degraded within five days (d) of incubation. Four metabolic compounds were detected during cyfluthrin degradation and identified as methyl-3-(2,2-dichlorovinyl)-2,2-dimethyl-(1-cyclopropane)-carboxylate, 4-fluoro-3-phenoxy-benzoic acid methyl ester, methyl-3-phenoxybenzoate, 3-phenoxy-benzaldehyde by gas chromatography-mass spectrometry (GC-MS) and tandem mass spectrum (MS/MS) analysis and no cyfluthrin was detected after seven days of incubation. A possible degradation pathway was proposed, and our data showed that cyfluthrin could be efficiently degraded by FLQ-11-1, indicating that this strain could potentially be used to eliminate the contamination of pyrethroid herbicides.
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Affiliation(s)
- Gui Ping Hu
- Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, China
| | - Yan Zhao
- Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, China
| | - Feng Qing Song
- Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, China
| | - Bo Liu
- Agricultural Bio-Resources Institute, Fujian Academy of Agricultural Sciences, Fuzhou 350003, China
| | - Liette Vasseur
- Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; Department of Biological Sciences, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario L2S 3A1, Canada
| | - Carl Douglas
- Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; Department of Botany, University of British Columbia, 3529-6270 University Blvd., Vancouver BC V6T 1Z4, Canada
| | - Min Sheng You
- Institute of Applied Ecology, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China; Key Laboratory of Integrated Pest Management for Fujian-Taiwan Crops, Ministry of Agriculture, China.
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Calzada J, Alcon A, Santos V, Garcia-Ochoa F. Extended kinetic model for DBT desulfurization using Pseudomonas Putida CECT5279 in resting cells. Biochem Eng J 2012. [DOI: 10.1016/j.bej.2012.04.018] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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