Two different processes such as the methanogenesis only process and the simultaneous methanogenesis/denitrification process were used in the single anaerobic reactor, and were compared by observing organic removal, biogas production, and its composition. Denitrification and methanogenesis were successfully occurred in a single anaerobic reactor of the anaerobic-aerobic system for treating leachate. In the methanogenesis only process, the maximum organic removal rate was 2.5 ㎏ COD/㎥/day while it was 1.6 ㎏ COD/㎥/day in the methanogenesis/denitrification process. Denitrification efficiency reached to approximately 100% in methanogenesis/denitrification process. The biogas compositions in methanogenesis/denitrification process were CH₄ of 71%, CO₂ of 25%, and N₂ of 4%, while its compositions in methanogenesis only process were CH₄ of 63%, CO₂ of 28%, and N₂ of 9%. The biogas production rates of methanogenesis only process and methanogenesis/denitrification process were 20 to 28 L/day and 7 to 13 L/day, respectively. The methanogenesis/denitrification process was presented as a feasible process in the anaerobic-aerobic system constructed for treating organic and nitrogen compounds in the leachate.
Abstract<BR>INTRODUCTION<BR>MATERIALS AND METHODS<BR>RESULTS AND DISCUSSIONS<BR>CONCLUSION<BR>ACKNOWLEDGEMENT<BR>REFERENCES<BR>
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