Methanogenic potential of lignites in Poland
| Autor: | Anna Pytlak, Artur Banach, Mirosław Słowakiewicz, Andrzej Bieganowski, Zofia Stępniewska, Cezary Polakowski, Yanhong Zheng, Agnieszka Wolińska, Adam Kubaczyński, Anna Szafranek-Nakonieczna |
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| Rok vydání: | 2018 |
| Předmět: |
010504 meteorology & atmospheric sciences
biology Chemistry Methanogenesis business.industry Stable isotope ratio Stratigraphy Geology 010502 geochemistry & geophysics biology.organism_classification 01 natural sciences Decomposition Methane chemistry.chemical_compound Fuel Technology Environmental chemistry Economic Geology Coal Microbial biodegradation business Microcosm 0105 earth and related environmental sciences Archaea |
| Zdroj: | International Journal of Coal Geology. 196:201-210 |
| ISSN: | 0166-5162 |
| DOI: | 10.1016/j.coal.2018.07.010 |
| Popis: | Microbial coal gasification is of great interest due to the necessity to develop more environmentally friendly methods of energy production. The two main lignite deposits in Poland (Belchatow and Turow) have been studied for their natural methanogenic potential. The biological origin of gases occurring in the investigated strata was confirmed by carbon stable isotope fractionation. Methanogenesis was examined via long-term anaerobic microcosm incubations which were performed using coal extracted from upper- and lower- most parts of the deposits at 10 to 40 °C. Present-day methane formation was distinguished from physical desorption by application of 2-bromoethane sulphonate (BES), an inhibitor of terminal methane formation steps. Furthermore, glycerol dialkyl glycerol tetraethers (GDGTs), were used to reconstruct the palaeoenvironmental conditions and explain how the lignite environment affects the methanogenic consortia. The data obtained reveal that microbial degradation of lignite occurs in the uppermost layers of the coal seam at the Belchatow lignite mine. Methane release was up to 0.064 ng CH4 g−1 day−1 at 30 °C. Biomarker analysis shows high abundance of GDGT-0 confirming the presence of methanogenic Archaea and implies that pH was an important factor regulating the development and activity of organic matter-degrading microbiota under neutral conditions as the most favourable for the methanogens. Inactivation of methanogenic pathways by BES led to stimulation of bacterial respiration, which suggests the presence of an active bacterial community, putatively involved in the decomposition of lignin. The biomarker analysis, depicting metabolic capabilities of the microbiota (especially GDGT-0 and GDGT-0/crenarchaeol ratio) and recognition of palaeoenvironmental conditions, is a useful tool to determine the methanogenic potential of coals. |
| Databáze: | OpenAIRE |
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