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Blunt W, Blanchard C, Morley K. Effects of environmental parameters on microbial rhamnolipid biosynthesis and bioreactor strategies for enhanced productivity. Biochem Eng J 2022. [DOI: 10.1016/j.bej.2022.108436] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Ahmad Z, Zhang X, Imran M, Zhong H, Andleeb S, Zulekha R, Liu G, Ahmad I, Coulon F. Production, functional stability, and effect of rhamnolipid biosurfactant from Klebsiella sp. on phenanthrene degradation in various medium systems. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 207:111514. [PMID: 33254394 DOI: 10.1016/j.ecoenv.2020.111514] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 10/10/2020] [Accepted: 10/13/2020] [Indexed: 06/12/2023]
Abstract
The present study investigated the stability and efficacy of a biosurfactant produced by Klebsiella sp. KOD36 under extreme conditions and its potential for enhancing the solubilization and degradation of phenanthrene in various environmental matrices. Klebsiella sp. KOD36 produced a mono-rhamnolipids biosurfactant with a low critical micelle concentration (CMC) value. The biosurfactant was stable under extreme conditions (60 °C, pH 10 and 10% salinity) and could lower surface tension by 30% and maintained an emulsification index of > 40%. The emulsion index was also higher (17-43%) in the presence of petroleum hydrocarbons compared to synthetic surfactant Triton X-100. Investigation on phenanthrene degradation in three different environmental matrices (aqueous, soil-slurry and soil) confirmed that the biosurfactant enhanced the solubilization and biodegradation of phenanthrene in all matrices. The high functional stability and performance of the biosurfactant under extreme conditions on phenanthrene degradation show the great potential of the biosurfactant for remediation applications under harsh environmental conditions.
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Affiliation(s)
- Zulfiqar Ahmad
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, China; Key Laboratory for Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Xuezhi Zhang
- Key Laboratory for Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Muhammad Imran
- Soil and Environmental Sciences Division, Nuclear Institute for Agriculture and Biology, Faisalabad 38000, Pakistan
| | - Hua Zhong
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, China.
| | - Shaista Andleeb
- School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan, Hubei 430070, China
| | - Rabail Zulekha
- Key Laboratory for Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Guansheng Liu
- State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, China
| | - Iftikhar Ahmad
- Department of Environmental Sciences, COMSATS Institute of Information Technology, Vehari 61100, Pakistan
| | - Frederic Coulon
- School of Water, Energy and Environment, Cranfield University, Cranfield, Bedfordshire MK43 0AL, UK
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Eslami P, Hajfarajollah H, Bazsefidpar S. Recent advancements in the production of rhamnolipid biosurfactants by Pseudomonas aeruginosa. RSC Adv 2020; 10:34014-34032. [PMID: 35519061 PMCID: PMC9056861 DOI: 10.1039/d0ra04953k] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Accepted: 08/24/2020] [Indexed: 01/10/2023] Open
Abstract
Rhamnolipid (RL) biosurfactant which is produced by Pseudomonas species is one of the most effective surface-active agents investigated in the literature. Over the years, many efforts have been made and an array of techniques has been developed for the isolation of RL produced strains as well as RL homolog characterization. Reports show that RL productivity by the best-known producer, Pseudomonas aeruginosa, is very diverse, from less than 1 gr/l to more than 200 g L-1. There are some major parameters that can affect RL productivity. These are culture conditions, medium composition, the mode of operation (batch, fed-batch and continuous), bioengineering/gene manipulation and finally extraction methods. The present paper seeks to provide a comprehensive overview on the production of rhamnolipid biosurfactant by different species of Pseudomonas bacteria. In addition, we have extensively reviewed their potential for possible future applications.
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Affiliation(s)
- Parisa Eslami
- Amirkabir University of Technology, Chemical Engineering Department Iran
| | - Hamidreza Hajfarajollah
- Amirkabir University of Technology, Chemical Engineering Department Iran
- Chemistry and Chemical Engineering Research Center of Iran, Chemical Engineering Department Iran +98 2122734406
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Abdel-Aziz MM, Al-Omar MS, Mohammed HA, Emam TM. In Vitro and Ex Vivo Antibiofilm Activity of a Lipopeptide Biosurfactant Produced by the Entomopathogenic Beauveria bassiana Strain against Microsporum canis. Microorganisms 2020; 8:microorganisms8020232. [PMID: 32050410 PMCID: PMC7074774 DOI: 10.3390/microorganisms8020232] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 02/04/2020] [Accepted: 02/06/2020] [Indexed: 01/24/2023] Open
Abstract
Microsporum canis is one of the most important dermatophyte causing tinea corporis and tinea capitis and its biofilm-form has a poor therapeutic response. The biosurfactant production by entomopathogenic fungi (EPF) has not been reported yet. The study aimed to investigate the potential usage of the EPF biosurfactant in the eradication of an ex vivo biofilm of Microsporum canis (M. canis) for the first time. An entomopathogenic fungus was isolated from the fungal-infected Vespa orientalis wasp and identified as Beauveria bassiana (MN173375). Chemical characterization revealed the lipopeptide nature of the B. bassiana biosurfactant (BBLP). Efficient antifungal and antibiofilm activities of BBLP against M. canis in vitro were detected. An ex vivo hair model was used to investigate the efficiency of BBLP against M. canis biofilm, in a scenario close to the in vivo conditions. M. canis ex vivo biofilm eradication was confirmed in stereo, scanning electron, and fluorescent images. Also, the ex vivo biofilm was less susceptible to BBLP treatment compared to its in vitro counterpart. In conclusion, BBLP showed significant eradication to the M. canis ex vivo biofilm and open horizons to use bio-resource derived from EPF in controlling microbial biofilm and holding great promise for combating recalcitrant dermatophytosis.
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Affiliation(s)
- Marwa M. Abdel-Aziz
- Regional Center for Mycology and Biotechnology (RCMB), Al-Azhar University, Cairo 11371, Egypt;
| | - Mohsen S. Al-Omar
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Qassim University, Buraydah 51452, Saudi Arabia;
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, JUST, Irbid 22110, Jordan
| | - Hamdoon A. Mohammed
- Department of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Qassim University, Buraydah 51452, Saudi Arabia;
- Department of Pharmacognosy, Faculty of Pharmacy, Al-Azhar University, Cairo 11371, Egypt
- Correspondence: ; Tel.: +96-6566-176-074
| | - Tamer M. Emam
- Department of Microbiology, Desert Research Center, Buraydah 51452, Saudi Arabia;
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Ram G, Melvin Joe M, Devraj S, Benson A. Rhamnolipid production using Shewanella seohaensis BS18 and evaluation of its efficiency along with phytoremediation and bioaugmentation for bioremediation of hydrocarbon contaminated soils. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2019; 21:1375-1383. [PMID: 31359777 DOI: 10.1080/15226514.2019.1633254] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study reports the combined use of a rhamnolipid type biosurfactant (BS) along with phytoremediation and bioaugmentation (BA) for bioremediation of hydrocarbon-contaminated soils. Bacterial isolates obtained from hydrocarbon contaminated soil were screened for rhamnolipid production and isolate BS18, identified as Shewanella seohaensis, was selected for bioremediation experiments. Growth of BS18 in mineral salt medium (MSM) with diesel oil as the carbon source showed a maximum biomass of 8.2 g L-1, rhamnolipid production of 2.2 mg g-1 cell dry weight, surface tension reduction of 28.6 mN/m and emulsification potential (EI24%) of 65.6. Characterization of rhamnolipid based on Fourier transmittance infrared (FTIR) analysis confirmed the presence of OH, CH2/CH3, C=O, and COO stretching vibrations, respectively, which are distinctive features of rhamnolipid type BSs. In bioremediation experiments, the lowest hydrocarbon concentration of 2.1 mg g-1 of soil for non-sterilized soil and 4.3 mg g-1 of soil for sterilized soil was recorded in the combined application of rhamnolipid, phytoremediation, and BA. This treatment also yielded the highest hydrocarbon degrading bacterial population (6.4 Log Cfu g-1 of soil), highest plant biomass (8.3 g dry weight plant-1), and the highest hydrocarbon uptake (512.3 mg Kg-1 of plant).
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Affiliation(s)
- Gomathi Ram
- Department of Microbiology, School of Life Sciences, VELS University, Chennai, India
| | - Manoharan Melvin Joe
- Department of Microbiology, School of Life Sciences, VELS University, Chennai, India
- Department of Industrial Microbiology, Sam Higginbottom University of Agriculture, Technology and Sciences, Allahabad, India
| | - Shalini Devraj
- Department of Microbiology, School of Life Sciences, VELS University, Chennai, India
| | - Abitha Benson
- School of Biosciences and Technology, VIT University, Vellore, India
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Christopher FC, Ponnusamy SK, Ganesan JJ, Ramamurthy R. Investigating the prospects of bacterial biosurfactants for metal nanoparticle synthesis - a comprehensive review. IET Nanobiotechnol 2019; 13:243-249. [PMID: 31053685 PMCID: PMC8676648 DOI: 10.1049/iet-nbt.2018.5184] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 12/04/2018] [Accepted: 12/16/2018] [Indexed: 11/04/2023] Open
Abstract
Establishing biological synthesis of nanoparticles is increasing nowadays in the field of nanotechnology. The search for an optimal source with durability, stability, capacity to withstand higher environmental conditions with excellent characteristics is yet to meet. Consequently, there is need to create an eco-friendly strategy for metal nanoparticle synthesis. One approach investigated in this review is the use of biosurfactants to enhance the synthesis biologically. In comparison with the other technologies, biosurfactants are less toxic and exhibit higher properties. This method is different from the conventional practice like physical and chemical methods. Several research studies represented that the biosurfactant influences the production of nanoparticles about 2-50 nm. In this manner, the research towards the biosurfactant has raised. This review also addressed the feasibility of biosurfactant and their benefits in the synthesis of metallic nanoparticles. The findings from this review can recommend a conceivable use of biosurfactant as a source for metal nanoparticle synthesis.
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Affiliation(s)
| | - Senthil Kumar Ponnusamy
- SSN-Centre for Radiation, Environmental Science and Technology (SSN-CREST), SSN College of Engineering, Chennai 603110, India.
| | - Janet Joshiba Ganesan
- Department of Chemical Engineering, SSN College of Engineering, Chennai 603110, India
| | - Racchana Ramamurthy
- Department of Chemical Engineering, SSN College of Engineering, Chennai 603110, India
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Hajfarajollah H, Eslami P, Mokhtarani B, Akbari Noghabi K. Biosurfactants from probiotic bacteria: A review. Biotechnol Appl Biochem 2018; 65:768-783. [PMID: 30120889 DOI: 10.1002/bab.1686] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 08/02/2018] [Accepted: 08/11/2018] [Indexed: 01/17/2023]
Abstract
Among microorganisms, bacteria are the main group of biosurfactant-producing organisms. Different types of bacteria including Pseudomonas sp., Acinetobacter sp., Bacillus sp., and Arthrobacter sp. are among the most commonly studied bacteria in the realm of scientific research. However, due to the pathogenic nature of the producing organisms, the application of these compounds is restricted, therefore, not suitable for use in food-related industries. Given that probiotic bacteria impact human health, applying probiotics as nonpathogenic and safe organisms have gained much attention for the production of biosurfactants in recent years. Most biosurfactants obtained from probiotic bacteria are related to a number of lactic acid bacteria (LAB). These types of biosurfactants are classified based on their structures as protein-carbohydrate complexes, lipids, or fatty acids. The present paper seeks to provide comprehensive and useful information about the production of various kinds of biosurfactants by different probiotic bacteria. In addition, we have extensively reviewed their potential for possible future applications.
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Affiliation(s)
- Hamidreza Hajfarajollah
- National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Iran.,Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran.,Chemical Engineering Department, Amirkabir University of Technology, Tehran, Iran
| | - Parisa Eslami
- Chemical Engineering Department, Amirkabir University of Technology, Tehran, Iran
| | - Babak Mokhtarani
- Chemistry and Chemical Engineering Research Center of Iran, Tehran, Iran
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Shalini D, Benson A, Gomathi R, John Henry A, Jerritta S, Melvin Joe M. Isolation, characterization of glycolipid type biosurfactant from endophytic Acinetobacter sp. ACMS25 and evaluation of its biocontrol efficiency against Xanthomonas oryzae. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2017. [DOI: 10.1016/j.bcab.2017.07.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Zhan Y, Wang Q, Chen C, Kim JB, Zhang H, Yoza BA, Li QX. Potential of wheat bran to promote indigenous microbial enhanced oil recovery. J Ind Microbiol Biotechnol 2017; 44:845-855. [PMID: 28190109 DOI: 10.1007/s10295-017-1909-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 01/29/2017] [Indexed: 11/29/2022]
Abstract
Microbial enhanced oil recovery (MEOR) is an emerging oil extraction technology that utilizes microorganisms to facilitate recovery of crude oil in depleted petroleum reservoirs. In the present study, effects of wheat bran utilization were investigated on stimulation of indigenous MEOR. Biostimulation conditions were optimized with the response surface methodology. The co-application of wheat bran with KNO3 and NH4H2PO4 significantly promoted indigenous MEOR (IMEOR) and exhibited sequential aerobic (O-), facultative (An-) and anaerobic (A0-) metabolic stages. The surface tension of fermented broth decreased by approximately 35%, and the crude oil was highly emulsified. Microbial community structure varied largely among and in different IMEOR metabolic stages. Pseudomonas sp., Citrobacter sp., and uncultured Burkholderia sp. dominated the O-, An- and early A0-stages. Bacillus sp., Achromobacter sp., Rhizobiales sp., Alcaligenes sp. and Clostridium sp. dominated the later A0-stage. This study illustrated occurrences of microbial community succession driven by wheat bran stimulation and its industrial potential.
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Affiliation(s)
- Yali Zhan
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
| | - Qinghong Wang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
| | - Chunmao Chen
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China.,Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI, 96822, USA
| | - Jung Bong Kim
- Department of Agro-Food Resources, National Institute of Agricultural Sciences, Rural Development Administration, Jeonju, 55365, Republic of Korea
| | - Hongdan Zhang
- State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing, 102249, China
| | - Brandon A Yoza
- Hawaii Natural Energy Institute, University of Hawaii at Manoa, Honolulu, HI, 96822, USA
| | - Qing X Li
- Department of Molecular Biosciences and Bioengineering, University of Hawaii at Manoa, Honolulu, HI, 96822, USA.
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Long X, Shen C, He N, Zhang G, Meng Q. Enhanced rhamnolipids production via efficient foam-control using stop valve as a foam breaker. BIORESOURCE TECHNOLOGY 2017; 224:536-543. [PMID: 27839682 DOI: 10.1016/j.biortech.2016.10.072] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 10/21/2016] [Accepted: 10/22/2016] [Indexed: 06/06/2023]
Abstract
In this study, a stop valve was used as a foam breaker for dealing with the massive overflowing foam in rhamnolipid fermentation. As found, a stop valve at its tiny opening could break over 90% of the extremely stable rhamnolipid foam into enriched liquid when foam flows through the sharp gap in valve. The efficient foam-control by the stop valve considerably improved the rhamnolipid fermentation and significantly enhanced the rhamnolipid productivity by 83% compared to the regular fermentation. This efficient foam breaking was mainly achieved by a high shear rate in combination with fast separation of air from the collapsed foam. Altogether, the stop valve possessed a great activity in breaking rhamnolipid foam, and the involving mechanism holds the potential for developing efficient foam breakers for industrial rhamnolipid fermentation.
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Affiliation(s)
- Xuwei Long
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, PR China; School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, PR China
| | - Chong Shen
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, PR China
| | - Ni He
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, PR China
| | - Guoliang Zhang
- Institute of Oceanic and Environmental Chemical Engineering, Zhejiang University of Technology, Hangzhou, PR China
| | - Qin Meng
- College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, PR China.
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Al-Mailem DM, Eliyas M, Radwan S. Enhanced bioremediation of oil-polluted, hypersaline, coastal areas in Kuwait via vitamin-fertilization. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2014; 21:3386-94. [PMID: 24243095 DOI: 10.1007/s11356-013-2293-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 10/24/2013] [Indexed: 05/15/2023]
Abstract
There is no research published sofar on managements that could bioremediate hypersaline soils and water polluted with hydrocarbons. The objective of this study was to assess the effect of vitamin amendment on hydrocarbon removal by microorganisms indigenous to such hypersaline environments. We used in this study ten hydrocarbonoclastic bacterial species and five archaeal species that had been isolated by the conventional plating method on media containing oil as a sole carbon source, from a hypersaline (3-4 M NaCl) coastal area in Kuwait, and characterized by sequencing of their 16S rRNA coding genes. The oil and pure hydrocarbon consumption was measured by gas-liquid chromatography. The oil and pure hydrocarbon consumption potential of all microorganisms in media with hypersalinity was enhanced by vitamin fertilization. This was true for individual microorganisms in pure cultures as well as for microbial consortia in hypersaline soil and water samples used as inocula. Most effective vitamins were thiamin, pyridoxine and vitamin B12. Vitamin fertilization using vitamin rich wastes or byproducts could be an effective practice for enhancing bioremediation of oil contaminated hypersaline environments.
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Affiliation(s)
- Dina M Al-Mailem
- Department of Biological Sciences, Faculty of Science, Kuwait University, PO Box 5969, Safat, 13060, Kuwait City, Kuwait
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Candida Biofilm Disrupting Ability of Di-rhamnolipid (RL-2) Produced from Pseudomonas aeruginosa DSVP20. Appl Biochem Biotechnol 2013; 169:2374-91. [DOI: 10.1007/s12010-013-0149-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2012] [Accepted: 02/18/2013] [Indexed: 10/27/2022]
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Chen J, Huang PT, Zhang KY, Ding FR. Isolation of biosurfactant producers, optimization and properties of biosurfactant produced by Acinetobacter sp. from petroleum-contaminated soil. J Appl Microbiol 2012; 112:660-71. [PMID: 22268814 DOI: 10.1111/j.1365-2672.2012.05242.x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To screen and identify biosurfactant producers from petroleum-contaminated soil; to use response surface methodology (RSM) for medium optimization to enhance biosurfactant production; and to study the properties of the newly obtained biosurfactant towards pH, temperature and salinity. METHODS AND RESULTS We successfully isolated three biosurfactant producers from petroleum-contaminated soil and identified them through 16S rRNA sequence analysis, which exhibit the highest similarities to Acinetobacter beijerinckii (100%), Kocuria marina (99%) and Kineococcus marinus (99%), respectively. A quadratic response model was constructed through RSM designs, leading to a 57·5% increase of the growth-associated biosurfactant production by Acinetobacter sp. YC-X 2 with an optimized medium: beef extract 3·12 g l(-1) ; peptone 20·87 g l(-1) ; NaCl 1·04 g l(-1); and n-hexadecane 1·86 g l(-1). Biosurfactant produced by Acinetobacter sp. YC-X 2 retained its properties during exposure to a wide range of pH values (5-11), high temperatures (up to 121°C) and high salinities [up to 18% (w/v) Na(+) and Ca(2+) ], which was more sensitive to Ca(2+) than Na(+). CONCLUSIONS Two novel biosurfactant producers were isolated from petroleum-contaminated soil. Biosurfactant from Acinetobacter sp. YC-X 2 has good properties to a wide range of pH, high temperature and high salinity, and its production was optimized successfully through RSM. SIGNIFICANCE AND IMPACT OF THE STUDY The fact, an increasing demand of high-quality surfactants and the lack of cost-competitive bioprocesses of biosurfactants for commercial utilization, motivates researchers to develop cost-effective strategies for biosurfactant production through isolating new biosurfactant producers with special surface-active properties and optimizing their cultural conditions. Two novel biosurfactant producers in this study will widen our knowledge about this kind of micro-organism. This work is the first application of RSM designs for cultural optimization of biosurfactant produced by Acinetobacter genus and the first report that biosurfactant may be more sensitive to Ca(2+) than Na(+) .
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Affiliation(s)
- J Chen
- Department of Pharmaceutical and Biological Engineering, School of Chemical Engineering, Sichuan University, Chengdu, China
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Górna H, Ławniczak Ł, Zgoła-Grześkowiak A, Kaczorek E. Differences and dynamic changes in the cell surface properties of three Pseudomonas aeruginosa strains isolated from petroleum-polluted soil as a response to various carbon sources and the external addition of rhamnolipids. BIORESOURCE TECHNOLOGY 2011; 102:3028-3033. [PMID: 21030252 DOI: 10.1016/j.biortech.2010.09.124] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2010] [Revised: 09/28/2010] [Accepted: 09/29/2010] [Indexed: 05/28/2023]
Abstract
Three Pseudomonas aeruginosa strains isolated from petroleum-polluted soil were the subject of studies concerning changes in cell surface properties. Fundamentally different reactions could be observed for each of the studied strains after a cultivation on various carbon sources. The experiments carried out during the logarithmic growth phase showed, that the changes in the cell surface hydrophobocity values were dynamic and substrate dependant. An external addition of rhamnolipids to the tested systems resulted in further shifts in the CSH values. All of the strains displayed miscellaneous phenotypic properties during MATH, sedimentation profile, Zeta potential and surface tension measurements. The obtained results lead to a conclusion, that the presence of rhamnolipids seems to be the key factor to this phenomenon, as all of the studied strains exhibited the ability to produce this biosurfactant in a different degree.
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Affiliation(s)
- Hanna Górna
- Institute of Chemical Technology and Engineering, Poznan University of Technology, Poznań, Poland
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Yu S, Zou P, Zhu W, Yang L, Xiao L, Jiang L, Wang X, Wu J, Yuan Y. Effects of humic acids and microorganisms on decabromodiphenyl ether, 4,4′-dibromodiphenyl ether and anthracene transportation in soil. Sci China Chem 2010. [DOI: 10.1007/s11426-010-0126-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Biosurfactant production by Pseudomonas aeruginosa SP4 using sequencing batch reactors: Effect of oil-to-glucose ratio. Biochem Eng J 2010. [DOI: 10.1016/j.bej.2009.12.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Wang H, Xu R, Li F, Qiao J, Zhang B. Efficient degradation of lube oil by a mixed bacterial consortium. J Environ Sci (China) 2010; 22:381-388. [PMID: 20614780 DOI: 10.1016/s1001-0742(09)60119-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A laboratory study was performed to assess the biodegradation of lube oil in bio-reactor with 304# stainless steel as a biofilm carrier. Among 164 oil degrading bacterial cultures isolated from oil contaminated soil samples, Commaonas acidovorans Pxl, Bacillus sp. Px2, Pseudomonas sp. Px3 were selected to prepare a mixed consortium for the study based on the efficiency of lube oil utilization. The percentage of oil degraded by the mixed bacterial consortium decreased slightly from 99% to 97.2% as the concentration of lube oil was increased from 2000 to 10,000 mg/L. The degradation of TDOC (total dissolved organic carbon) showed a similar tendency compared with lube oil removal, which indicated that the intermediates in degradation process hardly accumulated. Selected mixed bacterial consortium showed their edge compared to activated sludge. Scanning electron microscopy (SEM) photos showed that biofilms on stainless steel were robust and with a dimensional framework constructed by EPS (extracellular polymeric substances), which could promote the biodegradation of hydrocarbons. The increase of biofilm followed first-order kinetics with rate of 0.216 microg glucose/(cm2-day) in logarithm phase. With analysis of Fourier transform infrared spectroscopy (FT-IR) and gas chromatography-mass spectrometry (GC-MS) combined with removal of lube oil and TDOC, mixed bacterial consortium could degrade benzene and its derivatives, aromatic ring organic matters with a percentage over 97%.
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Affiliation(s)
- Haifeng Wang
- State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, Shanghai 200092, China.
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18
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Mulligan CN. Recent advances in the environmental applications of biosurfactants. Curr Opin Colloid Interface Sci 2009. [DOI: 10.1016/j.cocis.2009.06.005] [Citation(s) in RCA: 227] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Rapid quantification of a microbial surfactant by a simple turbidometric method. J Microbiol Methods 2008; 76:38-42. [PMID: 18840480 DOI: 10.1016/j.mimet.2008.09.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2008] [Revised: 09/09/2008] [Accepted: 09/12/2008] [Indexed: 11/21/2022]
Abstract
Quantification of the biosurfactants produced by a variety of microorganisms is a time taking and difficult task due to the lack of rapid, efficient and accurate methods. This work presents a simple turbidometric method for quantification of crude biosurfactants based on their property to become insoluble at low pH values. Biosurfactants obtained from a Bacillus sp. using different carbon substrates showed a good linear correlation (R(2)>0.99) between biosurfactant concentrations and turbidity in the range of 1 to 10 g L(-1) of crude biosurfactants. The substrate specific equations (SSE) and generalized equations (GE) developed in this work effectively predicted the amount of crude biosurfactant produced in different sets of fermentation experiments validating the method. A similar linear correlation was also observed with biosurfactants obtained from two other strains, Bacillus circulans and Pseudomonas sp. This simple method may prove to be effective in fast, accurate and inexpensive quantification of crude biosurfactants produced by diverse bacteria.
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