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.

scholarly journals Influence of Performance and Microbial Community by Internal pH Control on Anaerobic Digestion of Food Waste Leachate

2013 ◽  
Vol 35 (8) ◽  
pp. 571-578 ◽  
Author(s):  
Yeo-Myeong Yun ◽  
Si-Kyung Cho ◽  
Da-Young Jeong ◽  
Eun-Jin Lee ◽  
Kwan-Yong Huh ◽  
...  
Keyword(s):  
Microbial Community ◽  
Anaerobic Digestion ◽  
Food Waste ◽  
Ph Control ◽  
Internal Ph ◽  
Food Waste Leachate ◽  
Waste Leachate

Contrast Experimental Studies on Mesophilic and Thermophilic Anaerobic Digestion of Residual Activated Sludge

2011 ◽  
Vol 396-398 ◽  
pp. 1932-1935
Author(s):  
Guo De Li ◽  
Na Li
Keyword(s):  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Acid Concentration ◽  
Volatile Fatty Acid ◽  
Municipal Wastewater ◽  
Experimental Studies ◽  
Treatment Plant ◽  
Fatty Acid Concentration ◽  
Dosage Rate ◽  
Volatile Fatty Acid Concentration

In order to study the reducing and reusing of residual sludge from municipal wastewater treatment plant and solve the technical limit for traditional anaerobic digestion, the contrast research was carried out between the mesophilic(33 °C) and thermophilic(57 °C) anaerobic digestion. The results show that the thermophilic digestive efficiency is one time bigger than mesophilic. When sludge dosage rate increased, volatile fatty acid concentration rises sharply and pH drooped; When the reaction becomes stable, the volatile fatty acid concentration begins to be lowered, the corresponding pH rise gradually. At each sludge dosage rate, the alkalinity drops firstly and then increases with the reaction carried on. Furthermore, the fluctuation of pH values, VFA and the alkalinity of thermophilic are less than that of mesophilic for different sludge dosage.

Effect of total solids content on methane and volatile fatty acid production in anaerobic digestion of food waste

2014 ◽  
Vol 32 (10) ◽  
pp. 947-953 ◽  
Author(s):  
Flavia Liotta ◽  
Giuseppe d’Antonio ◽  
Giovanni Esposito ◽  
Massimiliano Fabbricino ◽  
Eric D van Hullebusch ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Food Waste ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Fatty Acid Production ◽  
Total Solids ◽  
Solids Content

scholarly journals Substrate Type And Pretreatment Type Effects On VFA Production

2021 ◽  
Author(s):  
Gamsathvani Sivanantham
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Food Waste ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Volatile Fatty Acids ◽  
Carbohydrate Content ◽  
Substrate Type ◽  
Fatty Acid Production

In the following report, the effects of substrate type and pretreatment type on the production of volatile fatty acids during anaerobic digestion was analyzed. First, the effects on volatile fatty acid production due to substrate type were investigated. It was determined that wastes that consisted of higher concentrations of carbohydrates would generate higher concentrations of volatile fatty acids during anerobic digestion. In the investigation it was evident that food waste had higher volatile fatty acid yields compared to sludge due to the carbohydrate content. Furthermore, the effects on volatile fatty acid production due to pretreatment type were also investigated. Thermal, chemical, physical and combined pretreatments were analysed. The various types of the different pretreatments and their effects on volatile fatty acid production during anaerobic digestion were discussed in depth.

scholarly journals Substrate Type And Pretreatment Type Effects On VFA Production

2021 ◽  
Author(s):  
Gamsathvani Sivanantham
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Anaerobic Digestion ◽  
Food Waste ◽  
Acid Production ◽  
Volatile Fatty Acid ◽  
Volatile Fatty Acids ◽  
Carbohydrate Content ◽  
Substrate Type ◽  
Fatty Acid Production

In the following report, the effects of substrate type and pretreatment type on the production of volatile fatty acids during anaerobic digestion was analyzed. First, the effects on volatile fatty acid production due to substrate type were investigated. It was determined that wastes that consisted of higher concentrations of carbohydrates would generate higher concentrations of volatile fatty acids during anerobic digestion. In the investigation it was evident that food waste had higher volatile fatty acid yields compared to sludge due to the carbohydrate content. Furthermore, the effects on volatile fatty acid production due to pretreatment type were also investigated. Thermal, chemical, physical and combined pretreatments were analysed. The various types of the different pretreatments and their effects on volatile fatty acid production during anaerobic digestion were discussed in depth.

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