Improved Methanogenic Communities for Biogas Production

Nakayama, Cristina Rossi; Penteado, Eduardo Dellosso; Duarte, Rubens Tadeu Delgado; Giachini, Admir José; Saia, Flávia Talarico

doi:10.1007/978-3-030-10516-7_4

Cited by 5 publications

(1 citation statement)

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“…Bacteria and fungi are responsible for breaking down complex molecules during hydrolysis, such as polysaccharides, proteins, and their forming units (amino acids, fatty acids, and alcohols) [38]. In the acidogenesis stage, fermentative microorganisms convert simple substrates into volatile fatty acids (VFA) (e.g., acetate, propionate, and butyrate), alcohols (e.g., ethanol and butanol), H 2 , and CO 2 [39].…”

Section: Biogeochemical Cycle Of Chmentioning

confidence: 99%

Methane, Microbes and Models in Amazonian Floodplains: State of the Art and Perspectives

Barros¹,

Bento²,

Ferreira³

et al. 2020

Changing Ecosystems and Their Services

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Amazon floodplain ecosystems include open water and intermittent flood forest and agricultural systems with different water types. They are a significant natural source of methane (CH 4) in the tropics. When soils are flooded and become anoxic, CH 4 is produced by methanogenesis, while microbially mediated aerobic and anaerobic oxidation of CH 4 serves as the primary biological sink of this greenhouse gas. Measurements of rates and controls on CH 4 production and emission in the Amazon basin mainly come from studies on individual wetlands and floodplain lakes. Similarly, microbial communities in those Amazon floodplain habitats have been studied on individual lakes based on sequence-specific DNA analysis. Existing biogeochemical ecosystem models of CH 4 from the Amazon floodplains focus on soil properties or involve factors such as pH, redox potentials, or substrates. None of these models incorporate appropriate seasonal inundation; neither the microbiota does it as a component. In this sense, our chapter will highlight how the important efforts already contributed to understand the CH 4 emission and its connections with abiotic and biotic factors in Amazon floodplains, as well as emphasize the need of encouraging cooperation and exchange of experience between research teams by using different approaches and scientific methods.

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Section: Biogeochemical Cycle Of Chmentioning

confidence: 99%