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Yao S, Lai J, Sun C, Zhao M, Duan J, Liao X, Pan Z. The microbial communities of the rust layer were influenced by seawater microbial communities. BIOFOULING 2024:1-18. [PMID: 39373126 DOI: 10.1080/08927014.2024.2411076] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 08/12/2024] [Accepted: 09/23/2024] [Indexed: 10/08/2024]
Abstract
To reveal the responsible microorganisms of microbiologically-influenced-corrosion (MIC), using 16S rRNA and ITS sequencing techniques, we investigated the bacterial and fungal communities in rust layer and seawater. Results show that the corrosion-related genera of Erythrobacter, norank_f__Rhodothermaceae, and Acinetobacter bacteria, as well as Aspergillus fungi, were overrepresented in the rust layer, along with the Pseudoalteromonas and Marinobacterium bacteria in seawater, and Ramlibacter, Aquimarina, and Williamsia bacteria were first detected in the rust layer. SourceTracker analysis revealed that approximately 23.08% of bacteria and 21.48% of fungi originated from seawater. Stochastic processes governed the rust layer and seawater microbial communities, and network analysis showed coexistence and interaction among bacterial and fungal communities. These results indicate that the composition of microbial communities in the rust layer was influenced by the marine environmental microbial communities, which can provide basic data support for the control of MIC in marine-related projects.
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Affiliation(s)
- Shengxun Yao
- Guangxi Key Laboratory of Marine Environmental Science, Guangxi Academy of Marine Sciences, Guangxi Academy of Sciences, Nanning, P.R. China
| | - Junxiang Lai
- Guangxi Key Laboratory of Marine Environmental Science, Guangxi Academy of Marine Sciences, Guangxi Academy of Sciences, Nanning, P.R. China
| | - Congtao Sun
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, P.R. China
| | - Maomi Zhao
- Guangxi Key Laboratory of Marine Environmental Science, Guangxi Academy of Marine Sciences, Guangxi Academy of Sciences, Nanning, P.R. China
| | - Jizhou Duan
- Key Laboratory of Marine Environmental Corrosion and Bio-fouling, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, P.R. China
| | - Xiufen Liao
- Guangxi Key Laboratory of Marine Environmental Science, Guangxi Academy of Marine Sciences, Guangxi Academy of Sciences, Nanning, P.R. China
| | - Zihan Pan
- Guangxi Key Laboratory of Marine Environmental Science, Guangxi Academy of Marine Sciences, Guangxi Academy of Sciences, Nanning, P.R. China
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Miller RB, Ghadimi H, Chinthala SP, Sadek A, Crouch AL, Floyd JG, Stevenson BS, Crookes-Goodson W, Senko JM, Monty CN. Evaluation of microbial corrosion in biofuel storage tanks using split-chamber zero resistance ammetry. J APPL ELECTROCHEM 2023. [DOI: 10.1007/s10800-022-01834-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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The car tank lid bacteriome: a reservoir of bacteria with potential in bioremediation of fuel. NPJ Biofilms Microbiomes 2022; 8:32. [PMID: 35484166 PMCID: PMC9050737 DOI: 10.1038/s41522-022-00299-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 04/04/2022] [Indexed: 11/08/2022] Open
Abstract
Bioprospecting of microorganisms suitable for bioremediation of fuel or oil spills is often carried out in contaminated environments such as gas stations or polluted coastal areas. Using next-generation sequencing (NGS) we analyzed the microbiota thriving below the lids of the fuel deposits of diesel and gasoline cars. The microbiome colonizing the tank lids differed from the diversity found in other hydrocarbon-polluted environments, with Proteobacteria being the dominant phylum and without clear differences between gasoline or diesel-fueled vehicles. We observed differential growth when samples were inoculated in cultures with gasoline or diesel as the main carbon source, as well as an increase in the relative abundance of the genus Pseudomonas in diesel. A collection of culturable strains was established, mostly Pseudomonas, Stenotrophomonas, Staphylococcus, and Bacillus genera. Strains belonging to Bacillus, Pseudomonas, Achromobacter, and Isoptericola genera showed a clear diesel degradation pattern when analyzed by GC-MS, suggesting their potential use for bioremediation and a possible new species of Isoptericola was further characterized as hydrocarbon degrader.
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Locating and Quantifying Carbon Steel Corrosion Rates Linked to Fungal B20 Biodiesel Degradation. Appl Environ Microbiol 2021; 87:e0117721. [PMID: 34586908 DOI: 10.1128/aem.01177-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Fungi that degrade B20 biodiesel in storage tanks have also been linked to microbiologically influenced corrosion (MIC). A member of the filamentous fungal genus Paecilomyces and a yeast from the genus Wickerhamomyces were isolated from heavily contaminated B20 storage tanks from multiple Air Force bases. Although these taxa were linked to microbiologically influenced corrosion in situ, precise measurement of their corrosion rates and pitting severity on carbon steel was not available. In the experiments described here, we directly link fungal growth on B20 biodiesel to higher corrosion rates and pitting corrosion of carbon steel under controlled conditions. When these fungi were growing solely on B20 biodiesel for carbon and energy, consumption of FAME and n-alkanes was observed. The corrosion rates for both fungi were highest at the interface between the B20 biodiesel and the aqueous medium, where they acidified the medium and produced deeper pits than abiotic controls. Paecilomyces produced the most corrosion of carbon steel and produced the greatest pitting damage. This study characterizes and quantifies the corrosion of carbon steel by fungi that are common in fouled B20 biodiesel through their metabolism of the fuel, providing valuable insight for assessing MIC associated with storing and dispensing B20 biodiesel. IMPORTANCE Biodiesel is widely used across the United States and worldwide, blended with ultra-low-sulfur diesel in various concentrations. In this study, we were able to demonstrate that the filamentous fungus Paecilomyces AF001 and the yeast Wickerhamomyces SE3 were able to degrade fatty acid methyl esters and alkanes in biodiesel, causing increases in acidity. Both fungi also accelerated the corrosion of carbon steel, especially at the interface of the fuel and water, where their biofilms were located. This research provides controlled, quantified measurements and the localization of microbiologically influenced corrosion caused by common fungal contaminants in biodiesel fuels.
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González-Benítez N, Bautista LF, Simarro R, Vargas C, Salmerón A, Murillo Y, Molina MC. Bacterial diversity in aqueous/sludge phases within diesel fuel storage tanks. World J Microbiol Biotechnol 2020; 36:180. [PMID: 33164118 DOI: 10.1007/s11274-020-02956-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2019] [Accepted: 10/27/2020] [Indexed: 10/23/2022]
Abstract
Diesel fuel storage tanks are not hostile environments for microorganisms and tend to form sludges in the water deposited at the bottom of the tanks. The lack of nutrient, carbon and energy limitations within these habitats boost the abundance and the metabolic activity of microorganisms providing microbial hotspots with high growing rates of diesel degradation (0.10 ± 0.021 d-1). Five different Phyla (Thermotogae, Spirochaetes, Firmicutes, Bacteroidetes Proteobacteria) were identified within the aqueous/sludge phase from in situ diesel storage tanks, by cultured independent molecular surveys using the 16S rDNA gene fragment. The identified dominant strains were Geotoga aestuarianus, Flavobacterium ceti, Spirochaeta thermophila, Propionispira arboris, Sporobacterium olearium and Dysgonomonas genera. The altitude where the storage tanks are located and the organic carbon concentration within the aqueous/sludge phases affected the bacterial diversity. Therefore, the more diverse the microbial communities are, the more probability of the presence of bacteria with capacity to metabolized diesel and eliminate organic matter. Despite, only phosphate showed an effect on the bacterial distribution within the storage tanks, there was an apparent lack of deterministic process in structuring microbial communities. Consequently, preventative protocols are a priority to avoid the microbial growth within diesel fuel storage tanks. A new focus of this worldwide problem within the oil industry would be to explore deeply the wide range of metabolic and adaptive capacities of these microorganisms. These microbial consortia are potential tools with new specific services to apply in bioremediation among others.
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Affiliation(s)
- Natalia González-Benítez
- Department of Biology, Geology, Physics and Inorganic Chemistry, ESCET, Universidad Rey Juan Carlos., 28933, Móstoles, Madrid, Spain.
| | - Luis Fernando Bautista
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, 28933, Móstoles, Madrid, Spain
| | - Raquel Simarro
- Department of Biology, Geology, Physics and Inorganic Chemistry, ESCET, Universidad Rey Juan Carlos., 28933, Móstoles, Madrid, Spain
| | - Carolina Vargas
- Department of Chemical and Environmental Technology, ESCET, Universidad Rey Juan Carlos, 28933, Móstoles, Madrid, Spain
| | - Armando Salmerón
- Repsol Technology Centre, C/ Agustín de Betancourt, s/n., 28935, Móstoles, Madrid, Spain
| | - Yolanda Murillo
- Repsol Technology Centre, C/ Agustín de Betancourt, s/n., 28935, Móstoles, Madrid, Spain
| | - María Carmen Molina
- Department of Biology, Geology, Physics and Inorganic Chemistry, ESCET, Universidad Rey Juan Carlos., 28933, Móstoles, Madrid, Spain
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Miller RB, Sadek A, Crouch AL, Floyd JG, Drake CA, Stevenson BS, Crookes-Goodson W, Monty CN, Senko JM. Novel Mechanism of Microbially Induced Carbon Steel Corrosion at an Aqueous/Non-aqueous Interface. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.0c02497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert B. Miller
- Department of Biology, The University of Akron, Akron, Ohio 44325, United States
- Integrated Bioscience Program, The University of Akron, Akron, Ohio 44325, United States
| | - Anwar Sadek
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Audra L. Crouch
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Dayton, Ohio 45433, United States
- UES, Inc., Beavercreek, Ohio 45432, United States
| | - James G. Floyd
- Department of Microbial and Plant Biology, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Carrie A. Drake
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Dayton, Ohio 45433, United States
- UES, Inc., Beavercreek, Ohio 45432, United States
| | - Bradley S. Stevenson
- Department of Microbial and Plant Biology, University of Oklahoma, Norman, Oklahoma 73019, United States
| | - Wendy Crookes-Goodson
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Dayton, Ohio 45433, United States
| | - Chelsea N. Monty
- Department of Chemical and Biomolecular Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - John M. Senko
- Department of Biology, The University of Akron, Akron, Ohio 44325, United States
- Integrated Bioscience Program, The University of Akron, Akron, Ohio 44325, United States
- Department of Geosciences, The University of Akron, Akron Ohio 44325, United States
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7
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Stamps BW, Bojanowski CL, Drake CA, Nunn HS, Lloyd PF, Floyd JG, Emmerich KA, Neal AR, Crookes-Goodson WJ, Stevenson BS. In situ Linkage of Fungal and Bacterial Proliferation to Microbiologically Influenced Corrosion in B20 Biodiesel Storage Tanks. Front Microbiol 2020; 11:167. [PMID: 32174893 PMCID: PMC7055474 DOI: 10.3389/fmicb.2020.00167] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Accepted: 01/23/2020] [Indexed: 11/13/2022] Open
Abstract
Renewable fuels hold great promise for the future yet their susceptibility to biodegradation and subsequent corrosion represents a challenge that needs to be directly assessed. Biodiesel is a renewable fuel that is widely used as a substitute or extender for petroleum diesel and is composed of a mixture of fatty acid methyl esters derived from plant or animal fats. Biodiesel can be blended up to 20% v/v with ultra-low sulfur diesel (i.e., B20) and used interchangeably with diesel engines and infrastructure. The addition of biodiesel, however, has been linked to increased susceptibility to biodegradation. Microorganisms proliferating via degradation of biodiesel blends have been linked to microbiologically influenced corrosion in the laboratory, but not measured directly in storage tanks (i.e., in situ). To measure in situ microbial proliferation, fuel degradation and microbially influenced corrosion, we conducted a yearlong study of B20 storage tanks in operation at two locations, identified the microorganisms associated with fuel fouling, and measured in situ corrosion. The bacterial populations were more diverse than the fungal populations, and largely unique to each location. The bacterial populations included members of the Acetobacteraceae, Clostridiaceae, and Proteobacteria. The abundant Eukaryotes at both locations consisted of the same taxa, including a filamentous fungus within the family Trichocomaceae, not yet widely recognized as a contaminant of petroleum fuels, and the Saccharomycetaceae family of yeasts. Increases in the absolute and relative abundances of the Trichocomaceae were correlated with significant, visible fouling and pitting corrosion. This study identified the relationship between fouling of B20 with increased rates of corrosion and the microorganisms responsible, largely at the bottom of the sampled storage tanks. To our knowledge this is the first in situ study of this scale incorporating community and corrosion measurements in an active biodiesel storage environment.
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Affiliation(s)
- Blake W Stamps
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, United States.,UES, Inc., Dayton, OH, United States.,711th Human Performance Wing, Airman Systems Directorate, Wright-Patterson AFB, Dayton, OH, United States
| | - Caitlin L Bojanowski
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Dayton, OH, United States
| | - Carrie A Drake
- UES, Inc., Dayton, OH, United States.,Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Dayton, OH, United States
| | - Heather S Nunn
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, United States
| | - Pamela F Lloyd
- UES, Inc., Dayton, OH, United States.,Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Dayton, OH, United States
| | - James G Floyd
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, United States
| | - Katelyn A Emmerich
- Air Force Life Cycle Management Center, Mobility Directorate, Wright Patterson AFB, Dayton, OH, United States
| | - Abby R Neal
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Dayton, OH, United States.,Azimuth Corporation, Dayton, OH, United States
| | - Wendy J Crookes-Goodson
- Soft Matter Materials Branch, Materials and Manufacturing Directorate, Air Force Research Laboratory, Wright-Patterson AFB, Dayton, OH, United States
| | - Bradley S Stevenson
- Department of Microbiology and Plant Biology, University of Oklahoma, Norman, OK, United States
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Liang R, Davidova I, Hirano SI, Duncan KE, Suflita JM. Community succession in an anaerobic long-chain paraffin-degrading consortium and impact on chemical and electrical microbially influenced iron corrosion. FEMS Microbiol Ecol 2019; 95:5529450. [DOI: 10.1093/femsec/fiz111] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2019] [Accepted: 07/06/2019] [Indexed: 11/12/2022] Open
Abstract
ABSTRACT
Community compositional changes and the corrosion of carbon steel in the presence of different electron donor and acceptor combinations were examined with a methanogenic consortium enriched for its ability to mineralize paraffins. Despite cultivation in the absence of sulfate, metagenomic analysis revealed the persistence of several sulfate-reducing bacterial taxa. Upon sulfate amendment, the consortium was able to couple C28H58 biodegradation with sulfate reduction. Comparative analysis suggested that Desulforhabdus and/or Desulfovibrio likely supplanted methanogens as syntrophic partners needed for C28H58 mineralization. Further enrichment in the absence of a paraffin revealed that the consortium could also utilize carbon steel as a source of electrons. The severity of both general and localized corrosion increased in the presence of sulfate, regardless of the electron donor utilized. With carbon steel as an electron donor, Desulfobulbus dominated in the consortium and electrons from iron accounted for ∼92% of that required for sulfate reduction. An isolated Desulfovibrio spp. was able to extract electrons from iron and accelerate corrosion. Thus, hydrogenotrophic partner microorganisms required for syntrophic paraffin metabolism can be readily substituted depending on the availability of an external electron acceptor and a single paraffin-degrading consortium harbored microbes capable of both chemical and electrical microbially influenced iron corrosion.
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Affiliation(s)
- Renxing Liang
- Department of Microbiology and Plant Biology, Institute for Energy and the Environment, University of Oklahoma, Norman, OK 73019, USA
| | - Irene Davidova
- Department of Microbiology and Plant Biology, Institute for Energy and the Environment, University of Oklahoma, Norman, OK 73019, USA
| | - Shin-ichi Hirano
- Department of Microbiology and Plant Biology, Institute for Energy and the Environment, University of Oklahoma, Norman, OK 73019, USA
| | - Kathleen E Duncan
- Department of Microbiology and Plant Biology, Institute for Energy and the Environment, University of Oklahoma, Norman, OK 73019, USA
| | - Joseph M Suflita
- Department of Microbiology and Plant Biology, Institute for Energy and the Environment, University of Oklahoma, Norman, OK 73019, USA
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Genome Sequence of a Byssochlamys sp. Strain Isolated from Fouled B20 Biodiesel. GENOME ANNOUNCEMENTS 2018; 6:6/9/e00085-18. [PMID: 29496830 PMCID: PMC5834322 DOI: 10.1128/genomea.00085-18] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Byssochlamys sp. strain AF001 is a filamentous fungus isolated from fouled B20 biodiesel. Its growth on B20 biodiesel results in the degradation and fouling of the fuel and higher rates of corrosion in affected storage tanks. The genome of Byssochlamys sp. AF001 is 35.9 Mbp and is composed of 10 scaffolds, with a G+C content of 45.89%.
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Parthipan P, Narenkumar J, Elumalai P, Preethi PS, Usha Raja Nanthini A, Agrawal A, Rajasekar A. Neem extract as a green inhibitor for microbiologically influenced corrosion of carbon steel API 5LX in a hypersaline environments. J Mol Liq 2017. [DOI: 10.1016/j.molliq.2017.05.059] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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11
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Leuchtle B, Xie W, Zambanini T, Eiden S, Koch W, Lucka K, Zimmermann M, Blank LM. Microbial challenges for domestic heating oil storage tanks. Eng Life Sci 2016. [DOI: 10.1002/elsc.201500127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Bernd Leuchtle
- Institute of Applied Microbiology-iAMB, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University; Aachen Germany
| | - Wei Xie
- Institute of Applied Microbiology-iAMB, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University; Aachen Germany
| | - Thiemo Zambanini
- Institute of Applied Microbiology-iAMB, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University; Aachen Germany
| | - Simon Eiden
- Oel-Waerme-Institut-OWI-Affiliated Institute RWTH Aachen; Herzogenrath Germany
| | - Winfried Koch
- Oel-Waerme-Institut-OWI-Affiliated Institute RWTH Aachen; Herzogenrath Germany
| | - Klaus Lucka
- Oel-Waerme-Institut-OWI-Affiliated Institute RWTH Aachen; Herzogenrath Germany
| | - Martin Zimmermann
- Institute of Applied Microbiology-iAMB, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University; Aachen Germany
| | - Lars M. Blank
- Institute of Applied Microbiology-iAMB, ABBt-Aachen Biology and Biotechnology, RWTH Aachen University; Aachen Germany
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12
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Microbiologically Influenced Corrosion of Carbon Steel Exposed to Biodiesel. INTERNATIONAL JOURNAL OF CORROSION 2016. [DOI: 10.1155/2016/4308487] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Environmental concerns over worsening air pollution problems caused by emissions from vehicles and depletion of fossil fuels have forced us to seek fuels such as biodiesel which can supplement petrofuels. Biodiesels have the ability to retain water and provide a conducive environment for microbiologically influenced corrosion (MIC) which may cause difficulties during transportation, storage, and their use. This paper analyses the influence of bacteria on the corrosivity of biodiesel obtained from Jatropha curcas on carbon steel using mass loss method. Carbon steel showed the highest corrosion rates in B100 (100% biodiesel) both in the presence and in absence of bacteria. The surface analysis of the metal was carried out using SEM.
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13
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Issues for storing plant-based alternative fuels in marine environments. Bioelectrochemistry 2014; 97:145-53. [DOI: 10.1016/j.bioelechem.2013.12.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Revised: 09/26/2013] [Accepted: 12/17/2013] [Indexed: 11/18/2022]
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Suflita JM, Aktas DF, Oldham AL, Perez-Ibarra BM, Duncan K. Molecular tools to track bacteria responsible for fuel deterioration and microbiologically influenced corrosion. BIOFOULING 2012; 28:1003-1010. [PMID: 22978494 DOI: 10.1080/08927014.2012.723695] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Investigating the susceptibility of various fuels to anaerobic biodegradation has become complicated with the recognition that the fuels themselves are not sterile. Bacterial DNA could be obtained when various fuels were filtered through a hydrophobic teflon (0.22 μm) membrane filter. Bacterial 16S rRNA genes from these preparations were PCR amplified, cloned, and the resulting libraries sequenced to identify the fuel-borne bacterial communities. The most common sequence, found in algal- and camelina-based biofuels as well as in ultra-low sulfur diesel (ULSD) and F76 diesel, was similar to that of a Tumebacillus. The next most common sequence was similar to Methylobacterium and was found in the biofuels and ULSD. Higher level phylogenetic groups included representatives of the Firmicutes (Bacillus, Lactobacillus and Streptococcus), several Actinobacteria, Deinococcus-Thermus, Chloroflexi, Cyanobacteria, Bacteroidetes, Alphaproteobacteria (Methylobacterium and Sphingomonadales), Betaproteobacteria (Oxalobacteraceae and Burkholderiales) and Deltaproteobacteria. All of the fuel-associated bacterial sequences, except those obtained from a few facultative microorganisms, were from aerobes and only remotely affiliated with sequences that resulted from anaerobic successional events evident when ULSD was incubated with a coastal seawater and sediment inoculum. Thus, both traditional and alternate fuel formulations harbor a characteristic microflora, but these microorganisms contributed little to the successional patterns that ultimately resulted in fuel decomposition, sulfide formation and metal biocorrosion. The findings illustrate the value of molecular approaches to track the fate of bacteria that might come in contact with fuels and potentially contribute to corrosion problems throughout the energy value chain.
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Affiliation(s)
- Joseph M Suflita
- The Biocorrosion Center, Institute for Energy and the Environment, University of Oklahoma, Norman, OK 73019, USA.
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15
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Sørensen G, Pedersen DV, Nørgaard AK, Sørensen KB, Nygaard SD. Microbial growth studies in biodiesel blends. BIORESOURCE TECHNOLOGY 2011; 102:5259-5264. [PMID: 21376581 DOI: 10.1016/j.biortech.2011.02.017] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2010] [Revised: 02/04/2011] [Accepted: 02/04/2011] [Indexed: 05/30/2023]
Abstract
Introduction of biofuels to the fuel matrix poses new questions and challenges. The present study investigates the microbiological stability of biodiesel blends in small scale microcosms. The study presents results from incubations of diesel-biodiesel blends with contaminated inoculation water collected from diesel storage tanks to ensure the presence of relevant fuel degrading bacteria. DAPI and qPCR analyses has subsequently shown an increased bacterial growth and activity in the microcosms containing biodiesel blends as the carbon source compared to those microcosms where neat fossil diesel made up the carbon source. Several anaerobic microorganisms have been identified after incubation. Presence of methanogens, sulfate-reducing bacteria and nitrate reducing bacteria has furthermore been confirmed by chemical analyses, supplemented by observations of methane formation in biodiesel incubations. The findings will contribute to the knowledge base for a safer introduction of biodiesel in the fuel matrix by employment of proper house-keeping and monitoring methods.
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Affiliation(s)
- Gitte Sørensen
- Danish Technological Institute, Kongsvang Alle 29, DK-8000 Aarhus C, Denmark.
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