Liquid Recirculation System for Anaerobic Digestion using Source Sorted Food Waste
This work is supported by Sudokwon Landfill Site Management Corporation.
In this study, the experiment was carried out to produce methane by applying liquid recirculation system for anaerobic digestion with source sorted food waste. There were two systems and each system consisted of a bioreactor and leachate tank. Each bioreactor had a screen near the bottom of the reactor. 2.5L of separated liquid was transferred to the leachate tank for 30min each day and the liquid from the leachate tank was pumped to the bioreactor as soon as the transfer was ended. At the beginning of the experiment, food waste/inoculum anaerobic sludge volume ratio was 2:8. Feeding was conducted every two weeks. Two different food waste loading were studied. Experimental results showed that the average organic loading rates were 3.51g VS/d for System A and 3.86g VS/d for System B, respectively. The average produced methane based on food waste fed to bioreactor were observed as 6.30m3CH4/kgVS·d for system A and 4.94m3CH4/kgVS·d for System B, respectively.
