scholarly journals Silicone membrane contactor for selective volatile fatty acid and alcohol separation

2021 ◽  
Vol 148 ◽  
pp. 125-136
Author(s):  
Harish Ravishankar ◽  
Paolo Dessì ◽  
Stefano Trudu ◽  
Fabiano Asunis ◽  
Piet N.L. Lens
Keyword(s):  
Fatty Acid ◽  
Volatile Fatty Acid ◽  
Membrane Contactor ◽  
Silicone Membrane

Rumen Metabolite of Balinese Cows that Being Given Stewed Water of Lannea coromandelica Peel as Feed Additive

2017 ◽  
Vol 3 (5) ◽  
pp. 24 ◽  
Author(s):  
Sio Stefanus ◽  
I.G. Mahardika ◽  
I.B.G Partama ◽  
N.N. Suryani
Keyword(s):  
Acetic Acid ◽  
Fatty Acid ◽  
Rice Bran ◽  
Volatile Fatty Acid ◽  
Gliricidia Sepium ◽  
Feed Additive ◽  
Random Design ◽  
Lannea Coromandelica

The research has been conducted to find out rumen metabolite of Balinese cows that being given stewed water of Lannea coromandelica peel as a feed additive. The research used group random design (RAK) with 4 treatments of rations and 3 times repetition. Each repetition used three Balinese cows. The weight of cows being used ranging between 137.5 – 235 kg. Basic rations being given were equal, arranged based on a percentage of dry material (% DM) namely: 50% of arrow grass, 20% of gamal leaves (Gliricidia sepium), 1% of urea and 29% of rice bran. Whereas for treatment was feed additive level. The basic ratio of +0 was feed additive (A). The basic ration of +1000 ml was feed additive (B). The basic ration of +1500 ml was feed additive (C) and a basic ration of +2000 ml was feed additive (D). Variables being observed were: N-NH3, volatile fatty acid total and volatile fatty acid partial (acetic acid, propionate acid and butyrate acid). The result of research showed that the administration of 1000 ml-2000 ml of feed additive of stewed water of Lannea coromandelica peel in basic ration differed markedly (P<0.05) to increase the concentration of N-NH3, volatile fatty acid total and volatile fatty acid partial. The utilization of stewed water of Lannea coromandelica peel as a feed additive in basic ration was increasing rumen metabolite of Balinese cows.

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...

scholarly journals Exogenous enzymes and probiotics alter digestion kinetics, volatile fatty acid content and microbial interactions in the gut of Nile tilapia

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Roel M. Maas ◽  
Yale Deng ◽  
Yueming Dersjant-Li ◽  
Jules Petit ◽  
Marc C. J. Verdegem ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Acid Content ◽  
Nile Tilapia ◽  
Volatile Fatty Acid ◽  
Fatty Acid Content ◽  
Microbial Interactions ◽  
Gut Health ◽  
Negative Effects ◽  
Exogenous Enzymes ◽  
Digestion Kinetics

AbstractSustainable aquafeed production requires fishmeal replacement, leading to an increasing use of plant-derived ingredients. As a consequence, higher levels of antinutritional substances, such as non-starch polysaccharides and phytate, are present in aquafeeds, with negative effects on fish performance, nutrient digestibility and overall gut health. To alleviate these negative effects, providing exogenous digestive enzymes and/or probiotics can be an effective solution. In this study, we tested the effect of dietary supplementation of enzymes (phytase and xylanase) and probiotics (three strains of Bacillus amyloliquefaciens) on nutrient digestion kinetics and volatile fatty acid content along the gut, and the distal gut microbiome diversity in Nile tilapia. Chyme volatile fatty content was increased with probiotic supplementation in the proximal gut, while lactate content, measured for the first time in vivo in fish, decreased with enzymes along the gut. Enzyme supplementation enhanced crude protein, Ca and P digestibility in proximal and middle gut. Enzymes and probiotics supplementation enhanced microbial interactions as shown by network analysis, while increased the abundance of lactic acid bacteria and Bacillus species. Such results suggest that supplementation with exogenous enzymes and probiotics increases nutrient availability, while at the same time benefits gut health and contributes to a more stable microbiome environment.

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