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Effective use of carbon dioxide in waste management

Research Project

Project/Area Number 16K06555
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Civil and environmental engineering
Research InstitutionPrefectural University of Hiroshima

Principal Investigator

SAKITA Shogo  県立広島大学, 生命環境学部, 准教授 (80398099)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords廃棄物 / 二酸化炭素 / 重金属 / 都市ごみ焼却灰 / 炭酸化 / ウルトラファインバブル / 都市ごみ / 焼却灰
Outline of Final Research Achievements

Carbonation of MSWI (Municipal Solid Waste Incineration) residues have been studied as a method of making the contained heavy metal less soluble by reacting the incineration residue exhibiting alkalinity with CO2. The merit of carbonation of MSWI bottom ash is that it can be done using the actual waste gas (containing about 5-10% of CO2) of the incineration plant.
In this study, for the purpose of more effective use of CO2, improvement measures of incineration bottom ash carbonation reaction efficiency, shortening of time to disposal site abolition by incineration ash carbonation processing as landfill pretreatment, and possibility and examination of the pH reduction measures of the leachate were conducted. As a result, CO2 content in water, carbonation of landfill waste using CO2-containing water, grasping the state of leaching aqueous state by new column water flow test combining three layers, pH reduction when using real leachate.

Academic Significance and Societal Importance of the Research Achievements

焼却灰の炭酸化処理の主たる目的である含有重金属不溶化に加え,埋立前処理としての利用や浸出水pHの低減といった新たな活用策をシステマティックに提案する点に特色を有する。また,独創的な点は,処理時間の短縮や操作性の向上を目的として,直接,CO2溶解水を焼却残渣に含水させて炭酸化処理を実行する点である。
3Rの推進によって,最終処分量は減少傾向にあるが,より安全かつ温室効果ガスの排出削減に寄与できる対策が求められている。また,現在,焼却残渣のリサイクルとしてセメント原料化の貢献が大きいが,長期的にはセメント需要量の低下が懸念されるため,本研究のような別の手法を検討する意義もあると考えられる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (4 results)

All 2018 2017 2016

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (2 results)

  • [Journal Article] Sediment Oxygen Demand of a Leachate Pond at an Offshore Municipal Solid Waste Disposal Site 2 Years after the Site Was Closed2018

    • Author(s)
      Sakita, S., Nishimoto, J., Nishimura, K.
    • Journal Title

      Journal of Geoscience and Environment Protection

      Volume: 6 Issue: 04 Pages: 181-193

    • DOI

      10.4236/gep.2018.64011

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Porous structure of municipal solid waste incineration bottom ash in initial stage of landfill2017

    • Author(s)
      Shogo Sakita, Jun Nishimoto, Kazuyuki Nishimura
    • Journal Title

      Journal of Geoscience and Environment Protection

      Volume: 5 Issue: 09 Pages: 9-20

    • DOI

      10.4236/gep.2017.59002

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 複数層に充填した都市ごみ焼却灰カラム通水試験による浸出水水質の経時変化(2)2017

    • Author(s)
      山崎 享,崎田 省吾,西村 和之
    • Organizer
      第28回廃棄物資源循環学会研究発表会
    • Related Report
      2017 Research-status Report
  • [Presentation] 複数層に充填した都市ごみ焼却灰カラム通水試験による浸出水水質の経時変化2016

    • Author(s)
      金澤 勇弥,崎田 省吾,西村 和之
    • Organizer
      第27回廃棄物資源循環学会研究発表会
    • Place of Presentation
      和歌山大学
    • Year and Date
      2016-09-27
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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