title: Characteristics of methane and nitrous oxide emissions from the wastewater treatment plant.
abstract: The nitrous oxide (N2O) and methane (CH4) emissions were measured from a municipal wastewater treatment plant (WWTP) using a flux chamber to determine the emission factors. The WWTP treats sewage using both the activated-sludge treatment and anaerobic/anoxic/aerobic (A(2)O) methods. Measurements were performed in the first settling, aeration, and secondary settling basins, as well as in the sludge thickener, sludge digestion tank, and A(2)O basins. The total emission factors of N2O and CH4 from the activated-sludge treatment were 1.256gN2O/kg total nitrogen (TN) and 3.734gCH4/kg biochemical oxygen demand (BOD5), respectively. Those of the advanced treatment (A(2)O) were 1.605gN2O/kg TN and 4.022gCH4/kgBOD5, respectively. These values are applicable as basic data to estimate greenhouse gas emissions.
authors.affiliation: Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul 08826, South Korea.
authors.forename: Kum-Lok
authors.initials: KL
authors.lastname: Hwang
authors.affiliation: Korea Environment Corporation, 42 Hwangyeong-ro, Seo-gu, Incheon 22689, South Korea.
authors.forename: Cheon-Hee
authors.initials: CH
authors.lastname: Bang
authors.affiliation: Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul 08826, South Korea. Electronic address: zohkd@snu.ac.kr.
authors.forename: Kyung-Duk
authors.initials: KD
authors.lastname: Zoh
mesh_terms: D008697:Methane / Q000032:analysis*; D009609:Nitrous Oxide / Q000032:analysis*; D012722:Sewage / Q000737:chemistry; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D008697:Methane; D009609:Nitrous Oxide; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Greenhouse gases; Methane; Nitrous oxide; Wastewater treatment plant