2010 Fiscal Year Final Research Report
Excess sludge suppression system under the high concentration of dissolved oxygen
| Project/Area Number |
20510086
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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 |
Environmental technology/Environmental materials
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| Research Institution | Ube National College of Technology |
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Principal Investigator |
YAMASAKI Hirohito Ube National College of Technology, 物質工学科, 教授 (20300618)
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| Co-Investigator(Kenkyū-buntansha) |
TAKEUCHI Masami 宇部工業高等専門学校, 物質工学科, 教授 (30043889)
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| Co-Investigator(Renkei-kenkyūsha) |
ITO Taiji 徳島大学, 疾患ゲノム研究センター, 講師 (60343109)
MURAKAMI Sadaaki 広島商船高等専門学校, 校長 (00035065)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 環境技術 / 環境材料 / 環境保全技術 |
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| Research Abstract |
Domestic wastewater is treated by conventional activated sludge process. In this system, a mass of excess sludge is generated. The sludge has been treated through a variety of processes and has been reused or landfilled. In this study, the activated sludge process was performed under the high concentration of dissolved oxygen (DO) to suppress the growth of microorganisms for building up the treatment process with lower amount of excess sludge. Under the high concentration of dissolved oxygen, the growth rate was reduced without decrease in the removal rate of the substrate. And, the sedimentation properties are better than those in the conventional process. The genetic engineering analysis has confirmed that different microbial species were cultured under the high DO condition from those in the conventional process.
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