Effect of wastewater step-feeding on a DHS reactor treating nitrogen rich wastewater
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- DANSHITA Tsuyoshi
- 長岡技術科学大学大学院 工学研究科 エネルギー・環境工学専攻
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- DAO Hoang T. N.
- 長岡技術科学大学大学院 工学研究科 エネルギー・環境工学専攻
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- HATAMOTO Masashi
- 長岡技術科学大学 産学融合トップランナー養成センター
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- TAKAHASHI Masanobu
- 東北大学大学院 工学研究科
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- MAKI Shinya
- 長岡技術科学大学技学研究院 技術科学イノベーション専攻
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- YAMAGUCHI Takashi
- 長岡技術科学大学技学研究院 技術科学イノベーション専攻
Bibliographic Information
- Other Title
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- ステップ流入が窒素含有廃水を処理するDHSリアクターに与える効果
- ステップ リュウニュウ ガ チッソ ガンユウ ハイスイ オ ショリ スル DHS リアクター ニ アタエル コウカ
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Description
In this study, DHS (Down-flow Hanging Sponge) reactor was used for partial nitrification of ammonium rich actual wastewater. To prevent pH decrease with nitrification, step-feeding was applied to DHS reactor and evaluated its effect on partial nitrification. The conventional one point feeding, 2 step feeding, and 4 step feeding were applied under constant nitrogen volumetric loading. Under the one point and 2 point feeding condition, about 40% of ammonium was oxidized and effluent pH was decreased to around 6.0. But for 4 step feeding condition, the pH was maintained around 7.5 despite the about 50% of ammonium was oxidized. Retained sludge of the DHS reactor had 26~49 mg-N/g-VSS/day of denitrification activity on day 516. From the profile of denitrification activity, step-feeding could be enhance the denitrification not only prevention of the pH decrease.
Journal
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- Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)
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Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 72 (7), III_1-III_8, 2016
Japan Society of Civil Engineers