MISC

2014年11月15日

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

Bioresource Technology
  • Kazuyuki Oshita
  • ,
  • Takuya Okumura
  • ,
  • Masaki Takaoka
  • ,
  • Takashi Fujimori
  • ,
  • Lise Appels
  • ,
  • Raf Dewil

171
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
DOI
https://doi.org/10.1016/j.biortech.2014.08.081
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/25194911
ID情報
  • DOI : 10.1016/j.biortech.2014.08.081
  • ISSN : 1873-2976
  • ISSN : 0960-8524
  • PubMed ID : 25194911
  • SCOPUS ID : 84908092708

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