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DOI : 10.17640/KSWST.2019.27.4.3 ,    Vol.27, No.4, 3 ~ 14, 2019
Two-phase Anaerobic Digestion of Food Waste Leachate Due to Organic Loading Rate at Thermophilic and Mesophilic Temperature
박혜린 Hye-lin Park , 박준규 Jun-gyu Park , 홍의환 Eui-hwan Hong , 전항배 Hang-bae Jun
This study demonstrates effects of temperature and organic loading rate (OLR) on performance of anaerobic digestion of food waste leachate. Thermophilic and mesophilic two-phase anaerobic digestion reactors were constructed to compare performance by increasing OLR. Thermophilic two-phase anaerobic digestion reactor shows a higher solubilization efficiency and operational stability than those of mesophilic two-phase anaerobic digestion reactor. Methane was efficiently produced in thermophilic two-phase anaerobic digestion reactor by high hydrolysis and acidogenesis efficiencies. At run 3 (OLR 10kg/㎥·d), specific methane production (SMP) was decreased in both of thermophilic and mesophilic two-phase anaerobic digestion reactors because ammonium ion concentration was sharply increased in reactors. However, operational stability of thermophilic reactor was higher than that of mesophilic one. These results show that the thermophilic reactor is advantageous in operation at high OLR.
Key Words
Anaerobic digestion, Mesophilic, Supernatant, Thermophilic anaerobic digestion, Two phase
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