Recent advances in methanogenesis through direct interspecies electron transfer via conductive materials: A molecular microbiological perspective

Advantage of conductive materials on interspecies electron transfer-independent acetoclastic methanogenesis: A critical review

“…Biodegradation of biomass to methane is performed by hydrolytic bacteria, acid-producing bacteria, acetogenic bacteria and methanogens [5]. The efficiency of methanogenesis is controlled by syntrophic interactions between bacteria and methanogens, which have complementary metabolisms [13,39,64,124]. In particular, bacteria and methanogens share electrons using two mechanisms: transfer of small compounds, e.g.…”

“…DIET-CO 2 reduction has been systematically proposed to explain methane production in studies lacking specific experiments allowing to decipher the mechanisms (Tables 1 and 2). This mechanism has been extensively reviewed [39,64,68,129]. Yet insights from recent reports point to another mechanism.…”

Nickel Foam Promotes Syntrophic Metabolism of Propionate and Butyrate in Anaerobic Digestion

“…1−3 Anaerobic digestion is the combined action of multiple microorganisms and is usually divided into successive stages of hydrolysis acidification, acetic acid production, and methanogenesis, which are performed collaboratively by hydrolytic bacteria, acidproducing microorganisms, and methanogens. 4 In anaerobic digestion, propionate and butyrate are essential intermediate metabolites produced during the anaerobic digestion of organic compounds and can be used to study biological reactions. 5,6 Anaerobic digestion of propionate and butyrate proceeds as follows: (1) propionate and butyrate are oxidized by propionate/butyrate-oxidizing bacteria to bicarbonate, acetate, and hydrogen or formic acid salt; 7 (2) hydrotrophic methanogens use H 2 to reduce carbon dioxide (CO 2 ) to CH 4 , and acetate-degrading methanogens convert acetic acid to methane (CH 4 ).…”

“…Anaerobic digestion is a common process used to treat organic wastes and high-concentration wastewaters by converting and recovering energy from organic wastes. − Anaerobic digestion is the combined action of multiple microorganisms and is usually divided into successive stages of hydrolysis acidification, acetic acid production, and methanogenesis, which are performed collaboratively by hydrolytic bacteria, acid-producing microorganisms, and methanogens …”

Perspectives on Potential Applications of Nanometal Derivatives in Gaseous Bioenergy Pathways: Mechanisms, Life Cycle, and Toxicity

“…Additionally, NMDs were found to be able to provide functional ions that enhance microbial performance and enzymatic activity . Importantly, during DF, hydrogenase enzyme activity is boosted, thanks to a slow but significant iron release from nanosized iron oxides. − On the basis of their various merits, NMDs have been extensively employed for enhancing and accelerating the performance of AD and DF treatment systems. ,− Fruitful efforts have been dedicated in recent review articles for explaining the role played by NMDs in AD and DF. − Attention was paid to highlighting NMDs’ advantageous impact. However, full illustration for all possible NMDs–microbes reactions and the interactions between these reactions have not been synthesized yet, and this constitutes the primary objective of this review.…”