scholarly journals Syntrophic Degradation of Lactate in Methanogenic Co-cultures

2010 ◽  
Author(s):  
Birte Meyer ◽  
David Stahl
Keyword(s):  
Syntrophic Degradation

scholarly journals More than 2500 years of oil exposure shape sediment microbiomes with the potential for syntrophic degradation of hydrocarbons linked to methanogenesis

Microbiome ◽  
2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Antonios Michas ◽  
Gisle Vestergaard ◽  
Kathleen Trautwein ◽  
Pavlos Avramidis ◽  
Dimitris G. Hatzinikolaou ◽  
...  
Keyword(s):  
Syntrophic Degradation ◽  
Oil Exposure

scholarly journals Syntrophic Degradation of Cadaverine by a Defined Methanogenic Coculture

2009 ◽  
Vol 75 (14) ◽  
pp. 4821-4828 ◽  
Author(s):  
Julia Roeder ◽  
Bernhard Schink
Keyword(s):  
16S Rrna ◽  
16S Rrna Gene ◽  
Electron Acceptor ◽  
Rrna Gene ◽  
Strictly Anaerobic ◽  
16S Rrna Gene Analysis ◽  
Sulfate Reducing ◽  
Cell Extracts ◽  
Syntrophic Degradation ◽  
Acetate Butyrate

ABSTRACT A novel, strictly anaerobic, cadaverine-oxidizing, defined coculture was isolated from an anoxic freshwater sediment sample. The coculture oxidized cadaverine (1,5-diaminopentane) with sulfate as the electron acceptor. The sulfate-reducing partner could be replaced by a hydrogenotrophic methanogenic partner. The defined coculture fermented cadaverine to acetate, butyrate, and glutarate plus sulfide or methane. The key enzymes involved in cadaverine degradation were identified in cell extracts. A pathway of cadaverine fermentation via 5-aminovaleraldehyde and crotonyl-coenzyme A with subsequent dismutation to acetate and butyrate is suggested. Comparative 16S rRNA gene analysis indicated that the fermenting part of the coculture belongs to the subphylum Firmicutes but that this part is distant from any described genus. The closest known relative was Clostridium aminobutyricum, with 95% similarity.

scholarly journals Syntrophic Degradation of Fatty Acids by Methanogenic Communities

2011 ◽  
pp. 127-142 ◽  
Author(s):  
Alfons J. M. Stams ◽  
Petra Worm ◽  
Diana Z. Sousa ◽  
M. Madalena Alves ◽  
Caroline M. Plugge
Keyword(s):  
Fatty Acids ◽  
Syntrophic Degradation

scholarly journals Effects of High Sludge Cycle Frequency on Performance and Syntrophic Metabolism of Anaerobic Membrane Bioreactor for Treating High-Lipid Kitchen Waste Slurry

Energies ◽  
2019 ◽  
Vol 12 (14) ◽  
pp. 2673 ◽  
Author(s):  
Xiaolan Xiao ◽  
Wansheng Shi ◽  
Wenquan Ruan
Keyword(s):  
Membrane Bioreactor ◽  
Oxygen Demand ◽  
Long Chain Fatty Acids ◽  
Organic Loading ◽  
Kitchen Waste ◽  
Cycle Frequency ◽  
Sludge Flocs ◽  
Loading Rates ◽  
High Lipid ◽  
Syntrophic Degradation

The performance and syntrophic metabolism of the Anaerobic Membrane Bio-reactor (AnMBR) treating high-lipid kitchen waste slurry under different sludge cycle frequencies were investigated in this study. When the sludge cycle frequencies were 3.6 cycles/h, 9.0 cycles/h and 14.4 cycles/h, the obtained Organic Loading Rates (OLRs) were 10.3 kg-COD/m3d, 12.4 kg-COD/m3d and 18.1 kg-COD/m3d, while the corresponding biogas productions were 190 L/d, 310 L/d and 520 L/d. Moreover, with an increase of sludge cycle frequency, the Chemical Oxygen Demand (COD) removal efficiency improved from 86.2% to 90.4% and 96.3%. Additionally, the higher sludge cycle frequency did not break up the sludge flocs and further affect the syntrophic degradation of the toxic Long-Chain Fatty Acids (LCFAs). Conversely, the higher sludge cycle frequency enhanced LCFA degradation and decreased LCFA accumulation. Meanwhile, under higher sludge cycle frequencies, the abundance of syntrophic Methanobacterium, Syntrophomonas and Clostridium increased and favored the syntrophic metabolism of LCFAs.

scholarly journals Correction to: More than 2500 years of oil exposure shape sediment microbiomes with the potential for syntrophic degradation of hydrocarbons linked to methanogenesis

Microbiome ◽  
2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Antonios Michas ◽  
Gisle Vestergaard ◽  
Kathleen Trautwein ◽  
Pavlos Avramidis ◽  
Dimitris G. Hatzinikolaou ◽  
...  
Keyword(s):  
Syntrophic Degradation ◽  
Oil Exposure

scholarly journals Enhanced syntrophic propionate degradation and methane production by granular activated carbon in AnSBR

2021 ◽  
Vol 293 ◽  
pp. 03026
Author(s):  
Yiyang Fan ◽  
Qiyi Chen ◽  
Han Yan ◽  
Jianzheng Li
Keyword(s):  
Activated Carbon ◽  
Steady State ◽  
Methane Production ◽  
Volatile Fatty Acids ◽  
Batch Reactor ◽  
Granular Activated Carbon ◽  
Limiting Factor ◽  
Methane Formation ◽  
Syntrophic Degradation ◽  
Propionate Degradation

Syntrophic degradation of propionate has been regarded as a limiting factor for methane formation in anaerobic digestion (AD) processes, due to its easier production but harder degradation than other volatile fatty acids. In the present study, 20 g/L granular activated carbon (GAC) was introduced into an anaerobic sequence batch reactor (AnSBR) and the enhancement of propionate degradation and methane production was evaluated with another AnSBR without GAC as a control. Inoculated with the same excess activated sludge, both AnSBRs were synchronously started up at 35 °C with the fed propionate increased gradually from the initial 340 mg/L to the final 1700 mg/L. The results showed that the introduction of GAC made the AnSBR get steady state 6 days earlier. With the fed propionate of about 1700 mg/L in the steady state, the average specific methane production and biomass was enhanced from 0.20 to 0.25 L/L·d, and 7.72 to7.96 g/L, respectively, by the introduced GAC. The results suggested that the GAC had functioned in stimulating microbial growth and enhancing direct interspecies electron transfer between hydrogen-producing acetogens and methanogens, which had resulted in the enhanced propionate degradation and methane production.

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