日本污水处理设施中污泥厌氧消化后的甲烷和氧化亚氮排放。

Methane and nitrous oxide emissions following anaerobic digestion of sludge in Japanese sewage treatment facilities.

机构信息

Graduate School of Global Environmental Studies, Kyoto University, C-cluster, Kyotodaigaku-katsura, Nishikyo-ku, Kyoto 615-8540, Japan; Department of Chemical Engineering, KU Leuven, Jan De Nayerlaan 5, 2860 Sint-Katelijne-Waver, Belgium.

Graduate School of Engineering, Kyoto University, C-cluster, Kyotodaigaku-katsura, Nishikyo-ku, Kyoto 615-8540, Japan.

出版信息

Bioresour Technol. 2014 Nov;171:175-81. doi: 10.1016/j.biortech.2014.08.081. Epub 2014 Aug 23.

DOI:10.1016/j.biortech.2014.08.081

PMID:25194911

Abstract

Methane (CH4) and nitrous oxide (N2O) are potent greenhouse gases with global warming potentials (expressed in terms of CO2-equivalents) of 28 and 265, respectively. When emitted to the atmosphere, they significantly contribute to climate change. It was previously suggested that in wastewater treatment facilities that apply anaerobic sludge digestion, CH4 continues to be emitted from digested sludge after leaving the anaerobic digester. This paper studies the CH4 and N2O emissions from anaerobically digested sludge in the subsequent sludge treatment steps. Two full-scale treatment plants were monitored over a 1-year period. Average emissions of CH4 and N2O were 509±72 mg/m(3)-influent (wastewater) and 7.1±2.6 mg/m(3)-influent, respectively. These values accounted for 22.4±3.8% of the indirect reduction in CO2-emissions when electricity was generated using biogas. They are considered to be significant.

摘要

甲烷（CH4）和氧化亚氮（N2O）是两种强效温室气体，全球变暖潜能值（以二氧化碳当量表示）分别为 28 和 265。当排放到大气中时，它们会显著加剧气候变化。此前有研究表明，在应用厌氧污泥消化的废水处理设施中，CH4 会在离开厌氧消化池后继续从消化污泥中释放出来。本文研究了后续污泥处理步骤中厌氧消化污泥的 CH4 和 N2O 排放情况。对两个全规模处理厂进行了为期 1 年的监测。CH4 和 N2O 的平均排放量分别为 509±72 mg/m3-进水（废水）和 7.1±2.6 mg/m3-进水，分别占使用沼气发电时间接减少 CO2 排放量的 22.4±3.8%。这些排放量被认为是显著的。