Metagenomic analysis of community, enzymes and metabolic pathways during corn straw fermentation with rumen microorganisms for volatile fatty acid production

2021 ◽  
pp. 126004
Author(s):  
Jinsong Liang ◽  
Wei Fang ◽  
Qingyan Wang ◽  
Muhammad Zubair ◽  
Guangming Zhang ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Metabolic Pathways ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Metagenomic Analysis ◽  
Corn Straw ◽  
Fatty Acid Production ◽  
Rumen Microorganisms

EFFECTS OF THIAMINE INHIBITORS ON CELLULOSE DIGESTION AND VOLATILE FATTY ACID PRODUCTION IN ARTIFICIAL RUMEN FERMENTATIONS

1965 ◽  
Vol 45 (2) ◽  
pp. 99-104 ◽  
Author(s):  
L. P. Milligan ◽  
J. M. Asplund ◽  
A. R. Robblee
Keyword(s):  
Fatty Acid ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Fermentation Medium ◽  
Rumen Fermentation ◽  
Fatty Acid Production ◽  
Rumen Microorganisms ◽  
Cellulose Digestion ◽  
Structural Analogues

The effect of the inclusion of thiamine inhibitors in a rumen fermentation medium on cellulose digestion and volatile fatty acid production by rumen microorganisms in vitro was studied. The addition of the structural analogues oxythiamine and neopyrithiamine to the fermentation medium at concentrations up to 4000 μM and 2000 μM, respectively, did not influence cellulose digestion or volatile fatty acid production. The addition of thiopental and hexetidine to the fermentation medium affected both cellulose digestion and volatile fatty acid production. Some inhibition of cellulose digestion and of volatile fatty acid production occurred with concentrations of thiopental and hexetidine in the fermentation medium as low as 720 μM and 15 μM respectively.

IN VITRO STUDIES ON THE ROLE OF BIOTIN IN THE METABOLISM OF RUMEN MICROORGANISMS

1967 ◽  
Vol 47 (1) ◽  
pp. 57-64 ◽  
Author(s):  
L. P. Milligan ◽  
J. M. Asplund ◽  
A. R. Robblee
Keyword(s):  
Fatty Acid ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Specific Effect ◽  
Biotin Deficiency ◽  
Fatty Acid Production ◽  
Rumen Microorganisms ◽  
Cellulose Digestion ◽  
Metabolic Intermediates

Four experiments, designed to study the role of biotin in cellulose digestion and volatile fatty acid production by rumen microorganisms, were conducted. These included trials to measure the effects of deletion of biotin from the fermentation medium, the addition of biotin antimetabolites to the medium, and the inclusion of metabolic intermediates on cellulose digestion and volatile fatty acid production.Omission of biotin from the medium markedly decreased cellulose digestion and volatile fatty acid production. Production of propionate was decreased approximately twice as much as was the production of acetate.Inclusion of the antimetabolite, desthiobiotin, at concentrations up to 0.47 mM had no effect, but 12 units of avidin per tube resulted in decreased cellulose digestion and reduced volatile fatty acid production. The latter effects were similar to those observed when biotin was omitted from the medium. The inhibitive effect of avidin was partially reversed by adding extra biotin. This suggests that the specific effect of a biotin deficiency on volatile fatty acid production probably involves a metabolic pathway concerned with propionate production.The addition of metabolic intermediates (glucose, 3-phosphoglycerate, pyruvate, lactate, oxaloacetate, malate, fumarate, and succinate) to biotin-containing and biotin-deficient systems failed to demonstrate that a deficiency of biotin resulted in blockage of a pathway of intermediary metabolism at any specific point.

A Techno-Economic case for Volatile Fatty Acid Production for Increased Sustainability in the Wastewater Treatment Industry

2021 ◽  
Author(s):  
Ganesh K Veluswamy ◽  
Andy Ball ◽  
Richard Dinsdale ◽  
Alan Guwy ◽  
Kalpit Shah
Keyword(s):  
Wastewater Treatment ◽  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Fugitive Emissions ◽  
Fatty Acid Production

Methane, the final product of methanogenesis during anaerobic digestion is a low value product (0.1$/m3). Concerns over fugitive emissions from methane coupled with recent reduction in costs of solar and...

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