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Screening and Characterization of Hydrocarbonoclastic Bacteria Isolated from Oil-contaminated Soils from Auto Garages

Received: 10 January 2018     Accepted: 1 February 2018     Published: 23 March 2018
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Abstract

Release of petroleum oil and its products into the environment is a worldwide concern. The present study focused on isolation, molecular identification, morphological and biochemical characterization of bacteria possessing hydrocarbon-degrading properties. The study also aimed at optimizing appropriate culture conditions for the isolates as well as screening for alkane hydroxylase enzyme. Out of twenty one microbes isolated, nine were selected based on their ability to utilize different hydrocarbons. The isolates were observed to mineralize heating oil, hexane, octane, toluene and diesel oil. PCR amplification of 16S rDNA gene revealed that the isolates belong to six different genera; Pseudomonas, Acinetobacter, Klebsiella, Enterobacter, Salmonella and Ochrobactrum. Based on their ability to degrade diesel oil, three isolates were selected and their growth conditions optimized. Optimum degradation was recorded at less than 1% substrate concentration, pH 7 and temperature range of between 30°C and 37°C and using yeast extract as nitrogen source. GC-MS analyses confirmed their diesel oil degrading properties. Alkane hydroxylase gene from one of the isolates (isolate 1C) was successfully amplified indicating its catabolic capabilities in degrading alkanes. Overall, the characterized isolates may constitute potential candidates for biotechnological application in environmental cleanup of petroleum contaminants.

Published in International Journal of Microbiology and Biotechnology (Volume 3, Issue 1)
DOI 10.11648/j.ijmb.20180301.13
Page(s) 11-24
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2018. Published by Science Publishing Group

Keywords

Oil-Contaminated Soils, Bacteria, Biodegradation, Petroleum Hydrocarbons

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Cite This Article
  • APA Style

    Agnes Njoki Mwaura, Betty Nyambura Mbatia, Edward Kirwa Muge, Patrick Wafula Okanya. (2018). Screening and Characterization of Hydrocarbonoclastic Bacteria Isolated from Oil-contaminated Soils from Auto Garages. International Journal of Microbiology and Biotechnology, 3(1), 11-24. https://doi.org/10.11648/j.ijmb.20180301.13

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    ACS Style

    Agnes Njoki Mwaura; Betty Nyambura Mbatia; Edward Kirwa Muge; Patrick Wafula Okanya. Screening and Characterization of Hydrocarbonoclastic Bacteria Isolated from Oil-contaminated Soils from Auto Garages. Int. J. Microbiol. Biotechnol. 2018, 3(1), 11-24. doi: 10.11648/j.ijmb.20180301.13

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    AMA Style

    Agnes Njoki Mwaura, Betty Nyambura Mbatia, Edward Kirwa Muge, Patrick Wafula Okanya. Screening and Characterization of Hydrocarbonoclastic Bacteria Isolated from Oil-contaminated Soils from Auto Garages. Int J Microbiol Biotechnol. 2018;3(1):11-24. doi: 10.11648/j.ijmb.20180301.13

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  • @article{10.11648/j.ijmb.20180301.13,
      author = {Agnes Njoki Mwaura and Betty Nyambura Mbatia and Edward Kirwa Muge and Patrick Wafula Okanya},
      title = {Screening and Characterization of Hydrocarbonoclastic Bacteria Isolated from Oil-contaminated Soils from Auto Garages},
      journal = {International Journal of Microbiology and Biotechnology},
      volume = {3},
      number = {1},
      pages = {11-24},
      doi = {10.11648/j.ijmb.20180301.13},
      url = {https://doi.org/10.11648/j.ijmb.20180301.13},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijmb.20180301.13},
      abstract = {Release of petroleum oil and its products into the environment is a worldwide concern. The present study focused on isolation, molecular identification, morphological and biochemical characterization of bacteria possessing hydrocarbon-degrading properties. The study also aimed at optimizing appropriate culture conditions for the isolates as well as screening for alkane hydroxylase enzyme. Out of twenty one microbes isolated, nine were selected based on their ability to utilize different hydrocarbons. The isolates were observed to mineralize heating oil, hexane, octane, toluene and diesel oil. PCR amplification of 16S rDNA gene revealed that the isolates belong to six different genera; Pseudomonas, Acinetobacter, Klebsiella, Enterobacter, Salmonella and Ochrobactrum. Based on their ability to degrade diesel oil, three isolates were selected and their growth conditions optimized. Optimum degradation was recorded at less than 1% substrate concentration, pH 7 and temperature range of between 30°C and 37°C and using yeast extract as nitrogen source. GC-MS analyses confirmed their diesel oil degrading properties. Alkane hydroxylase gene from one of the isolates (isolate 1C) was successfully amplified indicating its catabolic capabilities in degrading alkanes. Overall, the characterized isolates may constitute potential candidates for biotechnological application in environmental cleanup of petroleum contaminants.},
     year = {2018}
    }
    

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  • TY  - JOUR
    T1  - Screening and Characterization of Hydrocarbonoclastic Bacteria Isolated from Oil-contaminated Soils from Auto Garages
    AU  - Agnes Njoki Mwaura
    AU  - Betty Nyambura Mbatia
    AU  - Edward Kirwa Muge
    AU  - Patrick Wafula Okanya
    Y1  - 2018/03/23
    PY  - 2018
    N1  - https://doi.org/10.11648/j.ijmb.20180301.13
    DO  - 10.11648/j.ijmb.20180301.13
    T2  - International Journal of Microbiology and Biotechnology
    JF  - International Journal of Microbiology and Biotechnology
    JO  - International Journal of Microbiology and Biotechnology
    SP  - 11
    EP  - 24
    PB  - Science Publishing Group
    SN  - 2578-9686
    UR  - https://doi.org/10.11648/j.ijmb.20180301.13
    AB  - Release of petroleum oil and its products into the environment is a worldwide concern. The present study focused on isolation, molecular identification, morphological and biochemical characterization of bacteria possessing hydrocarbon-degrading properties. The study also aimed at optimizing appropriate culture conditions for the isolates as well as screening for alkane hydroxylase enzyme. Out of twenty one microbes isolated, nine were selected based on their ability to utilize different hydrocarbons. The isolates were observed to mineralize heating oil, hexane, octane, toluene and diesel oil. PCR amplification of 16S rDNA gene revealed that the isolates belong to six different genera; Pseudomonas, Acinetobacter, Klebsiella, Enterobacter, Salmonella and Ochrobactrum. Based on their ability to degrade diesel oil, three isolates were selected and their growth conditions optimized. Optimum degradation was recorded at less than 1% substrate concentration, pH 7 and temperature range of between 30°C and 37°C and using yeast extract as nitrogen source. GC-MS analyses confirmed their diesel oil degrading properties. Alkane hydroxylase gene from one of the isolates (isolate 1C) was successfully amplified indicating its catabolic capabilities in degrading alkanes. Overall, the characterized isolates may constitute potential candidates for biotechnological application in environmental cleanup of petroleum contaminants.
    VL  - 3
    IS  - 1
    ER  - 

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Author Information
  • Department of Biochemistry, University of Nairobi, Nairobi, Kenya

  • School of Pharmacy and Health Sciences, United States International University - Africa, Nairobi, Kenya

  • Department of Biochemistry, University of Nairobi, Nairobi, Kenya

  • Department of Biochemistry and Biotechnology, Technical University of Kenya, Nairobi, Kenya

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