| Project/Area Number |
22560542
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Civil and environmental engineering
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
FUJITA Shoichi 長岡技術科学大学, 工学部, 研究員 (30359707)
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| Co-Investigator(Kenkyū-buntansha) |
KOMATSU Toshiya 長岡技術科学大学, 工学部, 准教授 (10234874)
HIMENO Shuji 長岡技術科学大学, 工学部, 准教授 (31150360)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2010: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Keywords | バイオマス / 下水汚泥 / メタン発酵 / 稲わら |
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| Research Abstract |
Anaerobic co-digestion of sewage sludge and currently unused biomass has been paid attention. In this study, we operated pilot-scale digesters for practical application of the co-digestion technology of sewage sludge and rice straw. Before the pilot-scale study, laboratory-scale anaerobic digestion experiments were conducted in order to determine the pretreatment conditions of rice straw in the pilot-scale experiments. Pilot-scale equipment was installed in a sewage treatment plant. Three digesters having 500 L working volume were operated. Two digesters were fed sewage sludge with (1) water solubilized rice straw, (2) enzyme-water solubilized rice straw. The feeding ratio of sewage sludge and rice straw was 1:0.2 based on TS. A digester fed sewage sludge alone was operated as a control. The digesters were operated for 9 weeks with hydraulic retention times of about 25 days.As the results, higher TS removal and biogas production were observed by mixing rice straw. In the apparent steady-state condition, methane conversion efficiency of water pretreated rice straw and enzyme pretreated rice straw were 48% and 72% (COD basis), respectively. This study demonstrated that rice straw is a feasible biomassapplicable to co-digestion technology in sewage treatment plants.
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