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硫黄-石灰石粉混合造粒物を用いた畑地暗渠排水の脱窒処理
https://nodai.repo.nii.ac.jp/records/111
https://nodai.repo.nii.ac.jp/records/11189aba148-7635-4b09-9a56-938d89e3eebf
名前 / ファイル | ライセンス | アクション |
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KJ00004074130.pdf (974.9 kB)
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Item type | [ELS]紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2001-06-20 | |||||
タイトル | ||||||
タイトル | 硫黄-石灰石粉混合造粒物を用いた畑地暗渠排水の脱窒処理 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Denitrification of Underdrainage by Granulated Sulfur-limestone Mixture | |||||
言語 | ||||||
言語 | jpn | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 硝酸性窒素 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 独立栄養脱窒 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 硫黄石灰石ろ過法 | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | 暗渠排水 | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | nitrate-nitrogen | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | SLAD system | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | denitrification process | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | underdrainage | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
雑誌書誌ID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AN00164184 | |||||
論文名よみ | ||||||
タイトル | イオウ セッカイセキフン コンゴウ ゾウリュウブツ オ モチイタ ハタチ アンキョ ハイスイ ノ ダッチツ ショリ | |||||
著者 |
河原塚, 琢磨
× 河原塚, 琢磨× 谷田貝 敦× 増島 博× Kawaharazuka, Takuma× Yatagai Atsushi× Masujima Hiroshi |
|||||
著者所属(日) | ||||||
株式会社ニッチツ | ||||||
著者所属(日) | ||||||
株式会社ニッチツ | ||||||
著者所属(日) | ||||||
東京農業大学応用生物科学部生物応用化学科 | ||||||
著者所属(英) | ||||||
en | ||||||
Graduate School of Agricultural Chemistry, Tokyo University of Agriculture | ||||||
著者所属(英) | ||||||
en | ||||||
Nitchitsu Co. Ltd. | ||||||
著者所属(英) | ||||||
en | ||||||
Department of Applied Biology and Chemistry, Faculty of Applied Bioscience, Tokyo University of Agriculture | ||||||
記事種別(日) | ||||||
内容記述タイプ | Other | |||||
内容記述 | 論文 | |||||
記事種別(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | Article | |||||
抄録(日) | ||||||
内容記述タイプ | Other | |||||
内容記述 | 固体硫黄を用いた独立栄養脱窒(SLAD)法の問題点を改善した新しい脱窒資材である硫黄-石灰石粉混合造粒物(SC11)について脱窒温度特性の測定と畑地暗渠排水における現地脱窒実験を行い,次の結果を得た。1)SC11を用いた脱窒反応の温度特性では,15℃以上で脱窒が確認された。しかし20℃以下での脱窒能力の低下は著しく,実用には20℃以上が望ましい。2)SC11(2~50mm)を用いた暗渠排水脱窒実験では,硝酸性窒素の平均濃度75mg/lに対し,1日資材重量当たり2倍量(v/w)以下の流速,または1日資材1kg量当たり160mg以下の硝酸性窒素負荷量では99%以上の除去率が得られ,処理水中に亜硝酸性窒素は認められなかった。3)1日資材重量当たり2倍量以上の流速では,不完全な脱窒により処理水中に亜硝酸性窒素が残存した。このときの脱窒速度は,流速にかかわらずほぼ一定の値を示し,生成する硫酸の総量も一定であった。したがって流速を増すほど除去率は低下した。このことから硫黄を用いた脱窒処理は最適な流速の制御が重要であることが示された。4)処理水のpHはほぼ7.0±0.5の範囲に保たれ,生成する硫酸濃度に関係なく優れた中和応答を持続した。 | |||||
抄録(英) | ||||||
内容記述タイプ | Other | |||||
内容記述 | To improve the problem of the sulfur-limestone autotrophic denitrification (SLAD) process for treatment of nitrate-nitrogen contaminated water, novel material for denitrification bed was developed such as granulated sulfur-limestone mixture (SC11) which was made from sulfur and limestone of equal quantity in weight. The feasibility of the denitrification treatment by SC11 for underdrainage was studied. In batch experiments, the influence of temperature over the capacity of denitrification was examined with feed solution, SC11 and seed sediment. That capacity increased with the temperature in a range from 15℃ to 30℃. The decline of the denitrification ability was serious at lower temperatures. Therefore, the desirable temperature condition for SLAD process was higher than 20℃. In field experiment, nearly 100% of removal efficiency of NOx (NO_3^-+NO_2^-) was observed in the flow rate of twice as large as amount of SC11 (v/w) per day, on the effluent of the tile drain system, which contained approximately 75mg/l of NO_3^--N in average concentration. In this case, the maximum denitrification rate was 207mg of N per kilogram of SC11 per day. When the flow rate exceeded the level above, NO_2^- of the intermediate product was accumulated in the treated water, so that the removal efficiency of NOx decreased. Although the flow rate fluctuated, the pH level of the treated water was approximately neutral throughout the experiment period. The neutralization capacity of SC11 performed high responsibility independent of the concentration of SO_4^<2-> which was produced in the process. | |||||
書誌情報 | 巻 46, 号 1, p. 7-12 | |||||
レポート・講演番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | E | |||||
表示順 | ||||||
内容記述タイプ | Other | |||||
内容記述 | 2 | |||||
アクセション番号 | ||||||
内容記述タイプ | Other | |||||
内容記述 | KJ00004074130 |