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http://dx.doi.org/10.17137/Korrae.2013.21.4.50

Preliminary Evaluation of Leachate Recirculation Anaerobic Digestion System to treat Source Separated Food Waste  

Lee, Byonghi (Dept. of Environmental Energy Eng., Kyonggi University)
Lee, Jeseung (Dept. of Environmental Energy Eng., Kyonggi University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.21, no.4, 2013 , pp. 50-61 More about this Journal
Abstract
In order to generate a renewable energy-Methane, anaerobic systems fed with source separated food waste from university cafeteria were studied. At first, four reactors were evaluated with same feed components; content non-mixing anaerobic reactor without leachate withdrawal/recirculation, content mixing anaerobic reactor without leachate withdrawal/recirculation, content non-mixing anaerobic reactor with leachate withdrawal/recirculation and content mixing anaerobic reactor with leachate withdrawal/recirculation. From the first study, content non-mixing anaerobic reactor with leachate withdrawal/recirculation showed the highest gas production. From further study with this system, it was observed that leachate permeation rate within anaerobic reactor was very important factor for gas generation. The higher permeation rate, the more gas production was observed. It is assumed that 1kg of gas collector weight and C/N ration above 10 in food waste may cause gas consumption in the anaerobic reactor. The gas consumption was estimated by negative pressure build-up at gas collector. The negative pressure build-up must be explained to produce Methane from Food Waste.
Keywords
Source Separated Food Waste; Anaerobic Digestion; Leachate Recirculation; Negative Pressure;
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