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| Content Provider | Springer Nature Link |
|---|---|
| Author | Singleton, David R. Richardson, Stephen D. Aitken, Michael D. |
| Copyright Year | 2011 |
| Abstract | Two aerobic, lab-scale, slurry-phase bioreactors were used to examine the biodegradation of polycyclic aromatic hydrocarbons (PAHs) in contaminated soil and the associated bacterial communities. The two bioreactors were operated under semi-continuous (draw-and-fill) conditions at a residence time of 35 days, but one was fed weekly and the other monthly. Most of the quantified PAHs, including high-molecular-weight compounds, were removed to a greater extent in the weekly-fed bioreactor, which achieved total PAH removal of 76%. Molecular analyses, including pyrosequencing of 16S rRNA genes, revealed significant shifts in the soil bacterial communities after introduction to the bioreactors and differences in the abundance and types of bacteria in each of the bioreactors. The weekly-fed bioreactor displayed a more stable bacterial community with gradual changes over time, whereas the monthly-fed bioreactor community was less consistent and may have been more strongly influenced by the influx of untreated soil during feeding. Phylogenetic groups containing known PAH-degrading bacteria previously identified through stable-isotope probing of the untreated soil were differentially affected by bioreactor conditions. Sequences from members of the Acidovorax and Sphingomonas genera, as well as the uncultivated “Pyrene Group 2” were abundant in the bioreactors. However, the relative abundances of sequences from the Pseudomonas, Sphingobium, and Pseudoxanthomonas genera, as well as from a group of unclassified anthracene degraders, were much lower in the bioreactors compared to the untreated soil. |
| Starting Page | 1061 |
| Ending Page | 1073 |
| Page Count | 13 |
| File Format | |
| ISSN | 09239820 |
| Journal | Biodegradation |
| Volume Number | 22 |
| Issue Number | 6 |
| e-ISSN | 15729729 |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2011-03-03 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Bioreactor Bioremediation Polycyclic aromatic hydrocarbons Pyrosequencing Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Microbiology Soil Science & Conservation Geochemistry Waste Management/Waste Technology Terrestrial Pollution |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Pollution Environmental Engineering Bioengineering Microbiology |
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