Volatile Fatty Acid Anaerobic Degradation: Kinetic Modeling with an Inoculum under Controlled Conditions

2008 ◽  
Vol 47 (15) ◽  
pp. 5337-5345 ◽  
Author(s):  
Karina Boltes ◽  
Pedro Leton ◽  
Eloy Garcia-Calvo
Keyword(s):  
Fatty Acid ◽  
Kinetic Modeling ◽  
Anaerobic Degradation ◽  
Volatile Fatty Acid ◽  
Degradation Kinetic ◽  
Controlled Conditions

scholarly journals Effect of Volatile Fatty Acid Concentration on Anaerobic Degradation Rate from Field Anaerobic Digestion Facilities Treating Food Waste Leachate in South Korea

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Dong-Jin Lee ◽  
Su-Young Lee ◽  
Ji-Su Bae ◽  
Jung-Gu Kang ◽  
Ki-Heon Kim ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Food Waste ◽  
Anaerobic Degradation ◽  
Volatile Fatty Acid ◽  
Removal Rate ◽  
Volatile Solid ◽  
Volatile Fatty Acid Concentration ◽  
Food Waste Leachate ◽  
Waste Leachate

The purpose of this study was to investigate the effect of volatile fatty acid concentration on anaerobic degradation rate of food waste leachate in the anaerobic digestion facilities. The anaerobic digestion facilities treating food waste leachate (FWL), codigestion with food leachate and animal manure (A-MIX), and codigestion with food waste leachate and sewage sludge (S-MIX) were selected for this study. In accordance with the regulation under Wastes Control Act in South Korea, the guideline of volatile solid removal rate for anaerobic digestion facility is set as 65% for anaerobic degradation efficiency. Highest volatile solids removal rates were achieved from FWL (63.5%) than A-MIX (56.4%) and S-MIX (41.2%). Four out of eight FWLs met the guidelines. The concentration of volatile fatty acids, therefore, was analyzed to determine the relationship with volatile solid removal rate. The results showed that, in order to meet the Korean guideline of 65% volatile solid removal rate, volatile fatty acid concentrations should remain below 4,000 mg/L on the field anaerobic digestion facilities treating FWL. Volatile fatty acid concentrations should be used along with others as an operational parameter to control and manage the anaerobic digestion process.

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.

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