- Title
- Efficient bioremediation of PAHs-contaminated soils by a methylotrophic enrichment culture
- Creator
- Dhar, Kartik; Panneerselvan, Logeshwaran; Venkateswarlu, Kadiyala; Megharaj, Mallavarapu
- Relation
- Biodegradation Vol. 33, Issue 6, p. 575-591
- Publisher Link
- http://dx.doi.org/10.1007/s10532-022-09996-9
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2022
- Description
- Bioaugmentation effectively enhances microbial bioremediation of hazardous polycyclic aromatic hydrocarbons (PAHs) from contaminated environments. While screening for pyrene-degrading bacteria from a former manufactured gas plant soil (MGPS), the mixed enrichment culture was found to be more efficient in PAHs biodegradation than the culturable pure strains. Interestingly, analysis of 16S rRNA sequences revealed that the culture was dominated by a previously uncultured member of the family Rhizobiaceae. The culture utilized C1 and other methylotrophic substrates, including dimethylformamide (DMF), which was used as a solvent for supplementing the culture medium with PAHs. In the liquid medium, the culture rapidly degraded phenanthrene, pyrene, and the carcinogenic benzo(a)pyrene (BaP), when provided as the sole carbon source or with DMF as a co-substrate. The efficiency of the culture in the bioremediation of PAHs from the MGPS and a laboratory waste soil (LWS) was evaluated in bench-scale slurry systems. After 28 days, 80% of Σ16 PAHs were efficiently removed from the inoculated MGPS. Notably, the bioaugmentation achieved 90% removal of four-ringed and 60% of highly recalcitrant five- and six-ringed PAHs from the MGPS. Likewise, almost all phenanthrene, pyrene, and 65% BaP were removed from the bioaugmented LWS. This study highlights the application of the methylotrophic enrichment culture dominated by an uncultured bacterium for the efficient bioremediation of PAHs.
- Subject
- polycyclic aromatic hydrocarbons (PAHs); bioremediation; methylotrophic bacteria; enrichment culture; Rhizobiaceae; soil slurry; SDG 15; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1482135
- Identifier
- uon:50864
- Identifier
- ISSN:0923-9820
- Rights
- This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
- Language
- eng
- Full Text
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Goal 15: Life on land
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