Biotransformation of coal linked to nitrification
| Autor: | Torsten Thomas, Mike Manefield, Matthew Lee, Maria-Luisa Gutierrez-Zamora |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
biology
business.industry Chemistry Ecology Stratigraphy technology industry and agriculture Heterotroph Geology respiratory system Biodegradation biology.organism_classification complex mixtures respiratory tract diseases Biostimulation Fuel Technology Biotransformation Nitrifying bacteria Environmental chemistry otorhinolaryngologic diseases Economic Geology Nitrification Coal Autotroph business |
| Zdroj: | International Journal of Coal Geology. 137:136-141 |
| ISSN: | 0166-5162 |
| DOI: | 10.1016/j.coal.2014.12.001 |
| Popis: | The microbial transformation of coal into methane for energy production has gathered considerable interest in the past decade. Bacteria and fungi have been shown to aerobically depolymerise and solubilise coal, the products of which can feed fermentative and methanogenic processes. Coal generally exists in subsurface environments that are low in nutrients and oxygen, which slows down the biological breakdown of the inherently recalcitrant coal. This study therefore aimed to understand how the addition of nutrients and oxygen to microbial communities influences coal degradation. Aerobic microbial cultures were set up in the laboratory and were followed over time for the production of coal-derived hydrocarbons, CO2 and nitrate. Microbial activity in the presence of coal was evident from the increased production of CO2 in cultures. After approximately 100 days, nitrification processes were also observed. Hydrocarbons derived from coal were below detectable limits, but apparently sufficient to sustain a community of putative hydrocarbon-degrading heterotrophs and autotrophic, nitrifying bacteria as shown by 16S rRNA-gene based community analysis. Our data suggest an interaction between nitrification and coal biodegradation processes, which has implications for engineered coal degradation through biostimulation. |
| Databáze: | OpenAIRE |
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