生物学的脱窒装置

Biological denitrification equipment

Abstract

PROBLEM TO BE SOLVED: To provide biological denitrification equipment which enables stable nitrogen removal in a USB denitrification tank and suffices with a smaller reaction chamber capacity considered necessary in post denitrification and reaeration of post stages. SOLUTION: The raw water from raw water piping 1 is added with organic matter and a pH control agent respectively from piping 2 and 3 for addition and is then introduced from the lower part of a first denitrification tank 10 into a column from which the treated water is taken out through piping 12 for take-out. A granular sludge bed 11 is formed within the denitrification tank 10. The piping 12 is provided with a valve and a discharge variable pump capable regulating an opening degree, by which the amount of the organic matter to be added is controlled in such a manner that nitrate nitrogen and/or nitrite nitrogen remains in the outflow water flowing out to the piping 12. The treated water from the first denitrification tank 10 is subjected to addition of the organic matter from the piping 13 and is than introduced into a second denitrification tank 20. COPYRIGHT: (C)2002,JPO
(57)【要約】 【課題】 USB脱窒槽での安定した窒素除去を可能と し、また、後段の後脱窒、再曝気で必要とされる反応槽 容積が小さくて足りる生物学的脱窒装置を提供する。 【解決手段】 原水配管1からの原水は添加用の配管 2,3よりそれぞれ有機物及びpH調製剤が添加された 後、第1脱窒槽10の下部から塔内に導入され、処理水 が取出用配管12を介して取り出される。脱窒槽10の 内部にはグラニュールの汚泥床11が形成される。配管 2には開度調整可能なバルブや吐出量可変ポンプが設け られており、配管12へ流出する流出水中に硝酸性窒素 及び/又は亜硝酸性窒素が残留するように有機物の添加 量が制御される。第1脱窒槽10からの処理水は、配管 13から有機物の添加を受けた後、第2脱窒槽20へ導 入される。

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