Potential Methane Production on Anaerobic Co-digestion of Swine Manure and Food Waste



Shin, Joung-Du;Park, Sang-Won;Kim, Sang-Hyoun;Duangmanee, Jack;Lee, Po-Heng;Sung, Shi-Hwu;Lee, Bong-Hoon

  • 발행 : 2008.06.30


Anaerobic co-digestion of swine manure and food waste for biogas production was performed in serum bottles at various volatile solids(VS) contents and mixing ratios of two substrates(swine manure:food waste=$100:0{\sim}0:100$). Through kinetic mode of surface methodology, the methane production was fitted to a Gompertz equation. The ultimate methane production potential of swine manure alone was lower than that of food waste regardless of VS contents. However, it was appeared that maximum methane production potentials in 80 : 20 of the mixing rate at VS 3% was enhanced at 144.7%, compared to its only swine manure. The potential increased up to 815.71 ml/g VS fed as VS concentration and food composition increased up to 3.0% and 20%, respectively. The ultimate amount of methane produced had significantly a positive relationship with that of methane yield rate. Overall, it would be strongly recommended that feeding stocks use 20% of mixing ratio of food waste based on VS 3% contents when operating the anaerobic reactor on site at $35^{\circ}C$ if not have treatment of its anaerobic waste water.


Anaerobic co-digestion;Cumulative methane yield;Gompertz equation;Swine manure;Food waste;Methane production


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