2014年11月15日
Methane and nitrous oxide emissions following anaerobic digestion of sludge in Japanese sewage treatment facilities
Bioresource Technology
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- 巻
- 171
- 号
- 1
- 開始ページ
- 175
- 終了ページ
- 181
- 記述言語
- 英語
- 掲載種別
- 研究発表ペーパー・要旨(国際会議)
- DOI
- 10.1016/j.biortech.2014.08.081
- 出版者・発行元
- Elsevier Ltd
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±72mg/m3-influent (wastewater) and 7.1±2.6mg/m3-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.
- リンク情報
- ID情報
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- DOI : 10.1016/j.biortech.2014.08.081
- ISSN : 1873-2976
- ISSN : 0960-8524
- PubMed ID : 25194911
- SCOPUS ID : 84908092708