Bio-electrochemical conversion of atmospheric N2 to ammonium using free-living diazotrophs

Jung, Il Lae; Park, Young Chan; Park, Doo Hyun

doi:10.1007/s11814-016-0011-z

Cited by 2 publications

(1 citation statement)

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“…Jung et al built a conventional bioreactor and an electrochemical bioreactor, and evaluated the effect of using autogenous nitrogen-fixing bacteria to biochemically convert nitrogen in the atmosphere into ammonia nitrogen using electrochemical reduction. The biomass and ammonia nitrogen content in the bacterial culture discharged from the electrochemical bioreactor are 1.6 times and 6 times that of the conventional bioreactor, respectively, and the analysis suggests that the electrochemical reducing power may activate the nitrogen-fixing effect of nitrogen-fixing bacteria (57). Taking into account that the extracellular electron transport capacity of electro-producing bacteria in plants may also provide a certain electrochemical reduction force for the nitrogen-fixing bacteria's nitrogen-fixing effect.…”

Section: Morphological Characteristicsmentioning

confidence: 97%

Plant endophytic bacteria: a potential resource pool of electroactive microorganisms

Ling

Yang

et al. 2020

Preprint

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Electroactive microorganisms play a significant role in microbial fuel cells (MFCs). These devices, which are based on a wide microbial diversity, can convert a large array of organic matter components into sustainable and renewable energy. At present, electricity-producing microorganisms are mostly isolated from sewage, anaerobic sediments and soil, however, the sources are very limited. For a more comprehensive understanding of the electron transfer mechanism of the electricity-producing microorganisms and the interaction with the environment, it is necessary to obtain a thorough understanding of their resource distribution and discover potential resources. In this study, plant tissues were selected to isolate endophytic bacteria, and the electrochemical activity potential of those bacteria was evaluated by high-throughput screening with a WO3 nanoprobe. Twenty-six strains of endophytic bacteria were isolated from plant tissues belonging to Angelica and Sweet Potato, of which 17 strains from 6 genera had electrochemical activity, including Bacillus sp., Pleomorphomonas sp., Rahnella sp., Shinella sp., Paenibacillus sp. and Staphylococcus sp.. Moreover, the electricity-producing microorganisms in the plant tissue are enriched. Microbial community analysis by high-throughput sequence indicated that Pseudomonas and Clostridioides are the dominant genera of MFC anode inoculated with angelica tissue.Staphylococcus and Lachnoclostridium 5 are the dominant genera in MFC anode inoculated with sweet potato tissue. And the most representative Gram-positive strain Staphylococcus succinus subsp. succinus H6 and plant tissue-inoculated MFC were further analyzed for electrochemical activity. After nearly 1500 h of voltage monitoring and cyclic voltammetry analysis, the results showed that a strain numbered H6 and plant tissue-inoculated MFC had a good electrogenerating activity.

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Section: Morphological Characteristicsmentioning

confidence: 97%