Oxidation ditch method

Japanese: オキシデーションディッチ法 - おきしでーしょんでぃっちほう
Oxidation ditch method

...In the ultra-deep aeration method, the water depth is extended to about 50 to 100 m, and high-concentration oxygen is dissolved by using high pressure while the mixture of sewage and activated sludge descends from the ground and rises again through an iron tube, shortening the aeration time to about 30 minutes. Other variations on the activated sludge method include the pure oxygen aeration method, in which oxygen is selectively separated from the air and injected into the aeration tank, and the oxidation ditch method, in which an oval groove about 1 to 2 m deep is used as the aeration area. The trickling filter method is a type of treatment method that uses microorganisms attached to the surface, and another method that uses such attached microorganisms is called the rotating disk method. ...

*Some of the terminology used in reference to the "oxidation ditch method" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…さらに超深層エアレーション法では,水深を50~100m程度にまで延長し,鉄製チューブの中を下水と活性汚泥の混合液が地上より降下し再び地上へ上昇する間に,高圧を利用した高濃度酸素溶解が達成でき,エアレーションが30分間程度に短縮される。このほか,活性汚泥法の変形としては,空気から酸素だけを選択分離してエアレーションタンクに注入する純酸素エアレーション法,水深が1~2m程度の長円形の溝をエアレーション部分としたオキシデーションディッチ法(酸化溝法)などがある。散水ろ床法は表面に固着した微生物による処理法の一種であるが,このような固着微生物を利用した別の方法として回転円板法と呼ばれるものがある。…

※「オキシデーションディッチ法」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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