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Environmental Engineering Research 2003;8(5): 229-235. DOI: https://doi.org/10.4491/eer.2003.8.5.229
Jeong-Hoon Im1, Hae-jin Woo1, Tae-Ho Lee2, Hae-Ill Lee1, and Chang-Won Kim1
1Department of Environmental Engineering, Pusan National University, Pusan 609-735, Korea
2Institute for Environmental Technology and Industry, Pusan National University, Pusan 609-735, Korea
Corresponding Author: Chang-Won Kim ,Tel: +82-51-510-2416, Fax: +82-51-514-9574, Email: cwkim@pusan.ac.kr
Received: March 16, 2003;  Accepted: September 16, 2003.
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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 kg COD/m3/day while it was 1.6 kg COD/m3/day in the methanogenesis/denitrification process. Denitrification efficiency reached to approximately 100% in methanogenesis/denitrification process. The biogas compositions in methanogenesis/ denitrification process were Cm of 71%, CO? of 25%, and N2 of 4%, while its compositions in methanogenesis only process were CH> 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.
Keywords: methanogenesis | denitrification | anaerobic-aerobic system | gas production
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