Study of Inorganic Precipitation in the Anaerobic Digester using the thermodynamic and hydrodynamic model
| Project/Area Number |
26870512
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental engineering and reduction of environmental burden
Civil and environmental engineering
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| Research Institution | The University of Kitakyushu |
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Principal Investigator |
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
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| Keywords | 嫌気性消化 / 無機物 / レオロジー / チクソトロピー / 反応速度 / 嫌気性消化槽 / アルカリ土類塩 / 溶解性イオン濃度 / 動的変化 / リン酸マグネシウムアンモニウム / 嫌気消化汚泥 / 数学モデル / 無機物析出 / ダイナミックモデル |
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| Outline of Final Research Achievements |
The objective of this research is to reveal the mechanism of precipitation and dissolution in the anaerobic digester. To investigate the thixotropic behavior of high concentration anaerobic digested sludge, effecting the mixing of anaerobic digestion sludge for the reaction, a mathematical model was developed to express the thixotropic behavior, abatement and recovery caused by past shear application and rest. A laboratory scale experiment was also operated where Mg and Ca ions were added to the digester. Based on the solution’s thermodynamic equilibrium the data was analyzed to determine the change in precipitation complexes with elapsed time. The mathematical model that expresses anaerobic digestion and dissolution and precipitation of the inorganic component was constructed.
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Report
(4 results)
Research Products
(19 results)
