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The Treatment of Source Separated Food Waste by Mesophilic Anaerobic Digestion System with Leachate Recirculation
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 Title & Authors
The Treatment of Source Separated Food Waste by Mesophilic Anaerobic Digestion System with Leachate Recirculation
Cho, Chan-Hui; Lee, Byonghi; Lee, Yong-Woon;
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 Abstract
In this study, mesophilic anaerobic digestion of source separated food waste was carried out by leachate recirculation system and methane gas was produced. Two systems - system A and B were fabricated and placed within water bath to maintain . Each system was comprised of an anaerobic bioreactor and a leachate tank. Leachate in bioreactor was separated through the screen located at 30 mm above the bottom and a pump was installed to transfer collected leachate to the leachate tank. Everyday, 2.5 L of the leachate was pumped from the bioreactor to the leachate tank for 30 min and transferred leachate was pumped back to the top of the bioreactor for 30min, sequentially. Source separated food waste used for this experiment was washed by water before transferring to the laboratory. Transferred food waste was warmed to before being fed to bioreactors. System A was fed to 49.1 g VS (Volatile Solids) and System B was fed to 54.0 g VS at every two weeks, respectively. and salinity were monitored to see the inhibition toward anaerobic bioreaction and it was found that concentrations of these materials were not high enough to affect the bioreaction. Although the food waste was fed biweekly for 112 days and 140 days at system A and B, respectively, there was no sludge withdrawal from each system. Average methane productions rates were 0.439 L VS and 0.368 L VS for system A and B, respectively.
 Keywords
Leachate recirculation;Food waste;Anaerobic digestion;
 Language
Korean
 Cited by
1.
Comparison and Evaluation of Large-Scale and On-Site Recycling Systems for Food Waste via Life Cycle Cost Analysis, Sustainability, 2017, 9, 12, 2186  crossref(new windwow)
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