Cultivation and in situ detection of a thermophilic bacterium capable of oxidizing propionate in syntrophic association with hydrogenotrophic methanogens in a thermophilic methanogenic granular sludge

Article Abstract:

Researchers have identified a bacterium in methanogenic granular sludge related to Desulfotomaculum that can oxidize propionate, ethanol, and lactate in coculture with Methanobacterium thermoautotrophicum. It ferments pyruvate in pure culture.

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Diversity, localization, and physiological properties of filamentous microbes belonging to Chloroflexi subphylum I in mesophilic and thermophilic methanogenic sludge granules

Article Abstract:

A polyphasic approach based on molecular methods and cultivation is used to elucidate the diversity, distribution, and roles of Chloroflexi subphylum I-type bacteria involved in upflow anaerobic sludge blanket sludge granules. The findings reveal that organisms affiliated with the bacterial taxon Chloroflexi subphylum I are ubiquitous microbial populations in mesophilic and thermophilic sludge granules.

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Non-sulfate-reducing, syntrophic bacteria affiliated with Desulfotomaculum cluster I are widely distributed in methanogenic environments

Article Abstract:

A study is conducted to analyze the distribution and abundance of Desulfotomaculum subcluster Ih bacteria in low-sulfate, methanogenic environments. The findings indicate that members of Desulfotomaculum subcluster Ih have adopted a syntrophic lifestyle to thrive in low-sulfate, methanogenic environments and thus have lost their ancestral ability for dissmilatory sulfate/sulfite reduction.

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