Estimation of Nitrogen-Derived Energy Potential in Sewage Treatment Plants and Its Use

DOI Web Site 2 Citations
  • Kojima Keisuke
    清水建設株式会社 技術研究所 企画部
  • Kato Takahiro
    清水建設株式会社 技術研究所 環境基盤技術センター
  • Sumikura Mitsuhiro
    清水建設株式会社 技術研究所 環境基盤技術センター
  • Kawamoto Tohru
    国立研究開発法人 産業技術総合研究所 材料・化学領域 ナノ材料研究部門

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  • 下水処理場における窒素由来のエネルギーポテンシャルの試算とその利用に関する考察
  • ゲスイ ショリジョウ ニ オケル チッソ ユライ ノ エネルギーポテンシャル ノ シサン ト ソノ リヨウ ニ カンスル コウサツ

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<p>　Nitrogen component in sewerage treatment plants was noticed as a new energy source. Based on the statistics of sewerage systems(2017 edition), the nitrogen balance in sewerage treatment plants was investigated, and it was shown that the nitrogen component of about 0.484 million tons / years had flowed in, and when this nitrogen component was recycled(ammonification(about 0.588 million tos-NH3 / years)), the energy potential of about 3.68 billion kWh / years existed. This amount of energy was equivalent to about 57.1% of the amount of electricity used in sewage treatment plants (about 6.44 billion kWh / years), excluding sludge treatment plants and pumping plants, and it was considered significant to utilize the energy derived from nitrogen flowing into sewage treatment plants. However, since it is difficult at present to effectively utilize all nitrogen flowing into a sewage treatment plant, it has been shown that in order to efficiently recover and utilize energy derived from nitrogen in a sewage treatment plant, it is important to target sludge in which nitrogen components are concentrated and further recover nitrogen components present in a solid content of sludge.</p>

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