Characteristics of DO, organic matter, and ammonium profile for practical-scale DHS reactor under various organic load and temperature conditions
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- Naoki Nomoto
- Department of Energy and Environment Science, Nagaoka University of Technology, Niigata, Japan
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- Muntjeer Ali
- New Industry Creation Hatchery Center, Tohoku University, Sendai, Japan
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- Komal Jayaswal
- Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee, India
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- Akinori Iguchi
- Faculty of Applied Life Sciences, Niigata University of Pharmacy and Applied Life Sciences, Niigata, Japan
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- Masashi Hatamoto
- Department of Civil and Environmental Engineering, Nagaoka University of Technology, Niigata, Japan
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- Tsutomu Okubo
- Department of Civil Engineering, National Institute of Technology, Kisarazu College, Kisarazu, Japan
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- Masanobu Takahashi
- New Industry Creation Hatchery Center, Tohoku University, Sendai, Japan
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- Kengo Kubota
- Department of Civil and Environmental Engineering, Tohoku University, Sendai, Japan
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- Tadashi Tagawa
- Department of Civil Engineering, National Institute of Technology, Kagawa College, Takamatsu, Japan
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- Shigeki Uemura
- Department of Civil Engineering, National Institute of Technology, Kisarazu College, Kisarazu, Japan
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- Takashi Yamaguchi
- Department of Science of Technology Innovation, Nagaoka University of Technology, Niigata, Japan
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- Hideki Harada
- New Industry Creation Hatchery Center, Tohoku University, Sendai, Japan
書誌事項
- 公開日
- 2017-04-20
- 資源種別
- journal article
- DOI
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- 10.1080/09593330.2017.1316319
- 10.6084/m9.figshare.4892621
- 10.6084/m9.figshare.4892621.v1
- 公開者
- Informa UK Limited
この論文をさがす
説明
Profile analysis of the down-flow hanging sponge (DHS) reactor was conducted under various temperature and organic load conditions to understand the organic removal and nitrification process for sewage treatment. Under high organic load conditions (3.21–7.89 kg-COD m−3 day−1), dissolved oxygen (DO) on the upper layer of the reactor was affected by organic matter concentration and water temperature, and sometimes reaches around zero. Almost half of the CODCr was removed by the first layer, which could be attributed to the adsorption of organic matter on sponge media. After the first layer, organic removal proceeded along the first-order reaction equation from the second to the fourth layers. The ammoniacal nitrogen removal ratio decreased under high organic matter concentration (above 100 mg L−1) and low DO (less than 1 mg L−1) condition. Ammoniacal nitrogen removal proceeded via a zero-order reaction equation along the reactor height. In addition, the profile results of DO, CODCr, and NH3-N were different in the horizontal direction. Thus, it is thought the concentration of these items and microbial activities were not in a uniform state even in the same sponge layer of the DHS reactor.
収録刊行物
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- Environmental Technology
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Environmental Technology 39 (7), 907-916, 2017-04-20
Informa UK Limited
