2001 Fiscal Year Final Research Report Summary
Characterization of Constituents of Soluble Microbial Products in Wastewatar Treatment Processes
| Project/Area Number |
11558078
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
環境保全
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| Research Institution | Nagaoka National College of Technology |
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Principal Investigator |
ARAKI Nobuo Nagaoka College of Technology, Dept. of Civil Engineering, Associate Professor, 環境都市工学科, 助教授 (30193072)
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| Co-Investigator(Kenkyū-buntansha) |
MUROTANI Norio Sanki Engineering Co., LTD, Research Manager, 技術研究所, 課長
HARADA Hideki Nagaoka University of Technology, Dept. of Environ. Systems Engineering, Professor, 工学部, 教授 (70134971)
TANAKA Kazuhiro Nagaoka College of Technology, Dept. of Civil Engineering, Research Associate, 環境都市工学科, 助手 (40259841)
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| Project Period (FY) |
1999 – 2000
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| Keywords | Biofilter / Odor control / Composting / Odorous compounds / Ammonia oxidizing bacteria |
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| Research Abstract |
A biofilter that installs in the inside of composting reactor was investigated for controlling odorous substances, such as ammonia and amine compounds. Ammonia oxidizing bacteria and sulfur oxidizing bacteria grew in the biofilter was enumerated by applying new tools of molecular biotechnology. In model composting reactor experiment, the biofiter achieved to 0.9 mg-N/cm^3/d in ammonia oxidation activities, while ammonia oxidizer and nitrite oxidizer contained 10^9 cells/mL-biofilter, respectively. 16S rDNA cloning analysis revealed that dominant ammonia oxidizer in the biofilter was Nitrosomonas oligotropha. However the biofilter installed in composting reactor fed with garbages from a dining room had low ammonia oxidation activities. At that time Nitrifiers kept their cell number less than 10^7 cells/mL. High temperature in biofilter inhibited the growth of odorous compound degrading bacteria. PCR-DGGE methods suggested thai Halothiobacillus and Thiomonas play a key role in the oxidation of sulfur compounds released from the composts.
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