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Estimate of $CH_4$ Emission Factors in Municipal Wastewater Treatment Plants  

Yang, Hyung-Jae (Environmental Cap System Research Department, National Institute of Environmental Research)
Park, Jung-Min (Environmental Cap System Research Department, National Institute of Environmental Research)
Publication Information
Journal of environmental and Sanitary engineering / v.23, no.3, 2008 , pp. 39-46 More about this Journal
Abstract
In order to study the estimate of $CH_4$ emission factors in the municipal wastewater treatment plants, the active sludge process, 5-stage process, Denipho process, and SBR process were investigated. When active sludge process, 5-stage process, and Denipho process were used in wastewater treatment plant, the $CH_4$ emission factors were 2.88, 1.61, and 0.57 g-$CH_4/kg$-BOD, respectively. On the other hand, in the case of SBR process, it was 4.14 g-$CH_4/kg$-BOD. These results indicate that SBR process was effective for $CH_4$ emission in municipal wastewater treatment plants. Using the above processes, the methane emission factor and amount of waste water sludge were $4.78m^3/t$ and $12,204,506m^3/yr$, respectively. The remove of BOD was a range of $93.91{\sim}98.63%$.
Keywords
$CH_4$; emission factor; sludge; wastewater treatment;
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