2012 Fiscal Year Final Research Report
Improvement of digestion and production of high phosphorus containingsludge using sulfate reducing microorganisms
| Project/Area Number |
23656327
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Civil and environmental engineering
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| Research Institution | Kanazawa University |
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Principal Investigator |
IKEMOTO Ryoko 金沢大学, 環境デザイン学系, 教授 (40159223)
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| Co-Investigator(Kenkyū-buntansha) |
TAKANO Morihiro 石川工業高等専門学校, 環境都市工学科, 講師 (00369969)
NAKAKIHARA Eri 金沢大学, 環境デザイン学系, 博士研究員 (00547193)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 下水汚泥 / 嫌気性消化 / 硫酸塩還元 / リン回収 |
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| Research Abstract |
Degradation of excess sludge and recovery of phosphorus by the addition of CaSO4were investigated in a laboratory scale reactor. When CaSO4 was added to the excess sludge and cultivated in the anaerobic conditions at 25 oC, acetate was produced and phosphorus was accumulated in the sludge according to sulfate reductio . However, the amount of methane production did not increase. The effects of the addition of CaSO4 on sludge digestion were also examined. Methane yield of raw sludge was increased by the addition of CaSO4. The activity of sulfate reduction which produce acetate was high in the digested sludge.
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