<b>High-concentration Nitrogen Removal in Industrial Wastewater </b><b>Combining Biological Nitrite Reactions and </b><b>Subcritical Hydrothermal Reactions </b>
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- YAMASAKI Hirohito
- National Institute of Technology, Ube College
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- YOSHIYA Itoe
- National Institute of Technology, Ube College
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- TOKUNAGA Dai
- National Institute of Technology, Ube College
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- NEGORO Munetaka
- National Institute of Technology, Ube College
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- MIYAKOSHI Akihiko
- National Institute of Technology, Asahikawa College
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- FUKUNAGA Kimitoshi
- Graduate School of Science and Engineering, Yamaguchi University
Bibliographic Information
- Other Title
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- 生物亜硝酸化と水熱反応の組合せによる高濃度排アンモニア除去
- セイブツ アショウサンカ ト スイネツ ハンノウ ノ クミアワセ ニ ヨル コウノウドハイアンモニア ジョキョ
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Abstract
The removal of high-concentration nitrogen using subcritical hydrothermal reactions of equivalent mixtures of NO2- converted from the original NH4+ and NH4+ without a catalyst was studied. This reaction was carried out in a pressure bottle shaken for 1h with three kinds of initial substrate concentrations: 1,500, 3,000, and 5,000 ㎎/L of either NH4-N or NO2-N while setting the temperature at 140, 160, 180, or 200℃.<br>In the cases where the reaction temperatures were 180 and 200℃, over 90% of the total nitrogen successfully decomposed at the initial concentrations in the artificial water. Even if the reaction temperature was lowered to 140℃, over 90% was removed when the concentration of NH4-N and NO2-N were over 5,000 ㎎/L.<br>On the other hand, it was necessary to achieve above a 90% total nitrogen decomposition value when the initial concentration of NO2-N was 1.6 to 2.2 times higher than that of NH4-N when biologically treated water were used.<br>The combined treatment of a subcritical hydrothermal reaction followed by a biological nitrite reaction, can effectively remove high concentrations of nitrogen in industrial wastewater.
Journal
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- Journal of Environmental Conservation Engineering
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Journal of Environmental Conservation Engineering 44 (10), 568-573, 2015
Society of Environmental Conservation Engineering
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Keywords
Details 詳細情報について
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- CRID
- 1390282679571765888
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- NII Article ID
- 130005132225
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- NII Book ID
- AN00046213
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- ISSN
- 18828590
- 03889459
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- NDL BIB ID
- 026818000
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed