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Efficient treatment and energy recovery for supercritical water oxidation of wastes

Research Project

Project/Area Number 09450294
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 反応・分離工学
Research InstitutionKumamoto University

Principal Investigator

GOTO Motonobu  Kumamoto University, Dept of Applied Chemistry and Biochemistry, Associate Professor, 工学部, 助教授 (80170471)

Co-Investigator(Kenkyū-buntansha) HIROSE Tsutomu  Kumamoto University, Dept of Applied Chemistry and Biochemistry, Professor, 工学部, 教授 (40037841)
KODAMA Akio  Kumamoto University, Dept of Applied Chemistry and Biochemistry, Assistant Profe, 工学部, 助手 (30274690)
GOTO Motonobu  Kumamoto University, Dept of Applied Chemistry and Biochemistry, Associate Profe (80170471)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥7,200,000 (Direct Cost: ¥7,200,000)
Fiscal Year 1998: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1997: ¥3,700,000 (Direct Cost: ¥3,700,000)
KeywordsSupercritical water oxidation / Wastes treatment / Sewage sludge / Distillery wastewater / Kinetic analysis / Activation energy / Catalyst / 超臨界水 / 流通反応器 / 速度解析
Research Abstract

Supercritical water oxidation has been focused as an environmentally attractive technology where organic materials are oxidized to carbon dioxide, water, and N_2. We have applied the supercritical water oxidation to municipal excess sludge and alcohol distillery wastewater of molasses. The reaction was carried out in a batch reactor or a flow reactor with hydrogen peroxide as an oxidant in the temperature range of 473K-873K.The liquid phase products were colorless and odorless. The reaction products were analyzed in terms of total organic carbon (TOG), organic acids, and ammonium ion. TOG decreased with temperature and the oxidant amount. Acetic acid and ammonia were detected as major refractory intermediates in the product. When more than stoichiometric demand of oxidant was used, organic carbon in liquid phase was almost completely destroyed. Complete destruction of ammonia produced in the reaction required higher temperature than that of acetic acid. A tube-type flow reactor (1/8 inch-l.7 m) was constructed for the continuous treatment of wastes. The sludge was efficiently destructed by the flow reactor. Total organic carbon was measured as a function of reaction time. The kinetic data were analyzed by a single first order reaction model and two generalized models including refractory intermediate such as acetic acid. The rate constant in first order reaction model coincides with those reported in literature. The reaction rate constant for the decomposition of refractory intermediate in the generalized model was comparable to decomposition rate of acetic acid.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (16 results)

All Other

All Publications (16 results)

  • [Publications] Motonobu Goto et al.: "Supercritical Water Oxidation for the destruction of Municipal Excess Sludge and Alcohol Distillery Waste Water of Molasses" J.Supercritical Fluids. 13. 277-282 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 後藤元信 他: "超臨界技術による廃棄物の資源化" ケミカルエンジニヤリング. 44. (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Motonobu Goto et al.: "Kinetic Analysis for Destruction of Municipal Sewage Sludge and Alcohol Distillery Wastewater by Supercritical Water Oxidation" Industrial & Engineering Chemistry Research. 38. (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Motonobu Goto et al.: "Decomposition of Municipal Sludge by Supercritical Water Oxidation" J.Chem.Eng.Japan. 30. 813-818 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 後藤元信: "抽出技術集覧" 化学工業社, 6 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Motonobu Goto et al.: "Kinetic Analysis for Destruction of Municipal Sewage Sludge and Alcohol Distillery Wastewater by Supercritical Water Oxidation" Ind.Eng.Chem.Res.(in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Motonobu Goto et al.: "Supercritical Water Oxidation for the Destruction of Municipal Excess Sludge and Alcohol Distillery Wastewater of Molasses" J.Supercritical Fluids. 13,1-3. 277-282 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Motonobu Goto: "Resource Generation from Wastes by Supercritical Fluid Technology" Chemical Engineering. 44. 220-225 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Motonobu Goto et al.: "Wastewater and Wastes Treatment by Supercritical Fluid" Chushutu Gijutu Shuran, Kagaku Kogyosha. 2.3. 96-101 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Motonobu Goto et al.: "Decomposition of Municipal Sludge by Supercritical Water Oxidation" J.Chem.Eng.Japan. 30,5. 813-818 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Motonobu Goto et al.: "Supercritical Water Oxidation for the destruction of Municipal Excess Sludge and Alcohol Distillery Wastewater of Mutation" J.Supercritical. 13・1-3. 277-282 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 後藤元信 他: "兆輪会技術による廃棄物の資源化" ケミカルエンジニヤリング. 44. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] Motonobu Goto et al.: "Kinetic Analysis for Destruction of Municipal Sewage Sludge and Alchol Distillery Wastewater by Supercritical Water Oxidatron" Industrial & Engineering Chemistry Research. 38. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 後藤元信: "超臨界流体を利用した廃水・廃棄物処理" 抽出技術集覧、化学工学会関東支部・分離技術会編、化学工業社. 96-101 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Motonobu Goto, Takatsugu Nada, Satoshi Kawajiri, Akio Kodama, Tsutomu Hirose: "Decomposition of municipal sludge by supercritical water oxidation" Journal of Chemical Engineering of Japan.30. 813-818 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Motonobu Goto, Takatsugu Nada, Akane Ogata, Akio Kodama, Tsutomu Hirose: "Supercritical water oxidation by hydrogen peroxide for destruction of alcohol distillery wastewater and municipal sludge" 4th Int. Symp. on Sapercritical Fluids. 91-94 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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