Akita National College of Technology, Department of Civil and Environmental Engineering, Bunkyocho 1-1, Iijima, Akita, Japan.
Tohoku University, Department of Civil and Environmental Engineering, Aoba 6-6-06, Aobayama, Aoba-ku, Sendai, Japan.
Chemosphere. 2015 Dec;140:167-73. doi: 10.1016/j.chemosphere.2014.09.042. Epub 2014 Oct 22.
The seasonal variety of greenhouse gas (GHGs) emissions and the main emission source in a sewage treatment plant were investigated. The emission coefficient to treated wastewater was 291gCO2m(-3). The main source of GHGs was CO2 from the consumption of electricity, nitrous oxide from the sludge incineration process, and methane from the water treatment process. They accounted for 43.4%, 41.7% and 8.3% of the total amount of GHGs emissions, respectively. The amount of methane was plotted as a function of water temperature ranging between 13.3 and 27.3°C. An aeration tank was the main source of methane emission from all the units. Almost all the methane was emitted from the aeration tank, which accounted for 86.4% of the total gaseous methane emission. However, 18.4% of the methane was produced in sewage lines, 15.4% in the primary sedimentation tank, and 60.0% in the aeration tank.
研究了污水处理厂温室气体（GHG）排放的季节性变化和主要排放源。处理废水的排放系数为 291gCO2m(-3)。GHG 的主要来源是电力消耗产生的二氧化碳、污泥焚烧过程产生的氧化亚氮和水处理过程产生的甲烷。它们分别占 GHG 排放总量的 43.4%、41.7%和 8.3%。甲烷的排放量随水温在 13.3 至 27.3°C 之间呈线性变化。曝气池是所有单元中甲烷排放的主要来源。几乎所有的甲烷都是从曝气池中排放出来的，占总气态甲烷排放量的 86.4%。然而，18.4%的甲烷是在污水管道中产生的，15.4%是在初沉池产生的，60.0%是在曝气池中产生的。
